Re: [MBZ] Type III ACC Questions

[Dan Penoff via Mercedes]

Pulled the KLIMA this evening.  It was sealed with clear RTV around the base, 
which tells me it’s probably not the original.  I got it open pretty easily and 
didn’t find anything amiss inside. The solder joints on the main terminals were 
pretty tight and looked good, so I didn’t reflow them.  I put it back together 
after giving the relays a shot of contact cleaner and resealed the case.  I got 
AC when I was done, so it’s still working.

It had some non-MB stickers on it, so I’m guessing it’s a replacement.  Nothing 
that would identify who it came from, however.

I’ve got my hands full with the wife away tending to the mother in law, who had 
hip surgery today. I’ve got a conference all next week in Orlando, so I’m not 
digging into anything of substance right now.  I’ve got a meter of power 
steering return line I might install before the weekend, but that will be the 
extent of my tinkering for a week or so.

Dan

 
> On Mar 9, 2016, at 5:50 PM, WILTON via Mercedes <mercedes@okiebenz.com> wrote:
> 
> Yep, 'sounds like the intermittent compressor ops of my 124 'til I replaced 
> the KLIMA.
> 
> Wilt
> 
> - Original Message - From: "Dan Penoff via Mercedes" 
> <mercedes@okiebenz.com>
> To: "Mercedes Discussion List" <mercedes@okiebenz.com>
> Cc: "Dan Penoff" <dpen...@verizon.net>
> Sent: Wednesday, March 09, 2016 4:54 PM
> Subject: Re: [MBZ] Type III ACC Questions
> 
> 
>> Drove to the dealer at lunch today to pick up some windshield wiper shaft 
>> bushings and a couple of tubes of MB windshield washer concentrate.
>> 
>> Got AC and dash/center vents no problem, got pretty chilly.
>> 
>> On the drive home, I got center vents but no AC. Shut off the car at the dry 
>> cleaners. Got AC and center vents no problem upon restarting. Stopped at 
>> FLAPS to drop off the alternator core. After leaving, got center vents and 
>> AC all the way home.
>> 
>> I'm going to put my wiper arms back on this evening, so I'll pull the KLIMA 
>> and have a look, maybe even reflow the solder joints on it. If it's the 
>> original, as I suspect it is, I would be willing to bet that it needs 
>> reflowing and that this is the source of the intermittent compressor 
>> operation.
>> 
>> Got a meter of power steering return line today, so I'll be replacing the 
>> original/leaky lines on that, too.
>> 
>> Dan
>> 
>> Sent from my iPad
>> 


___
http://www.okiebenz.com

To search list archives http://www.okiebenz.com/archive/

To Unsubscribe or change delivery options go to:
http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com

Re: [MBZ] Type III ACC Questions

[WILTON via Mercedes]

Yep, 'sounds like the intermittent compressor ops of my 124 'til I replaced 
the KLIMA.


Wilt

- Original Message - 
From: "Dan Penoff via Mercedes" <mercedes@okiebenz.com>

To: "Mercedes Discussion List" <mercedes@okiebenz.com>
Cc: "Dan Penoff" <dpen...@verizon.net>
Sent: Wednesday, March 09, 2016 4:54 PM
Subject: Re: [MBZ] Type III ACC Questions


Drove to the dealer at lunch today to pick up some windshield wiper shaft 
bushings and a couple of tubes of MB windshield washer concentrate.


Got AC and dash/center vents no problem, got pretty chilly.

On the drive home, I got center vents but no AC. Shut off the car at the 
dry cleaners. Got AC and center vents no problem upon restarting. Stopped 
at FLAPS to drop off the alternator core. After leaving, got center vents 
and AC all the way home.


I'm going to put my wiper arms back on this evening, so I'll pull the 
KLIMA and have a look, maybe even reflow the solder joints on it. If it's 
the original, as I suspect it is, I would be willing to bet that it needs 
reflowing and that this is the source of the intermittent compressor 
operation.


Got a meter of power steering return line today, so I'll be replacing the 
original/leaky lines on that, too.


Dan

Sent from my iPad

On Mar 9, 2016, at 4:09 PM, Curly McLain via Mercedes 
<mercedes@okiebenz.com> wrote:


It is next to the OVP  They generally say KLIMA on top.

I wonder what's in the KLIMA relay that's rebuildable? Can't be much to 
them if Programa sells a rebuild for $65.


Anyone vet open one up? Maybe a resolver and cap replacement is what's 
necessary to bring them back into working order?


Also, is the KLIMA in the cowl behind the false firewall? I've seen the 
OVP there.


Dan

Sent from my iPad

On Mar 8, 2016, at 10:57 PM, Curly McLain via Mercedes 
<mercedes@okiebenz.com> wrote:
All my problems were the KLIMA relay.  The Beloved Herr Doktor argued 
with me, and said the Klimas never failed (in his experience).  My 
experience was that EVERY KLIMA fails.  OVP relay can cause wonky 
problems too.  I've never had an OVP relay failYET!

>



___
http://www.okiebenz.com

To search list archives http://www.okiebenz.com/archive/

To Unsubscribe or change delivery options go to:
http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com



___
http://www.okiebenz.com

To search list archives http://www.okiebenz.com/archive/

To Unsubscribe or change delivery options go to:
http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com




___
http://www.okiebenz.com

To search list archives http://www.okiebenz.com/archive/

To Unsubscribe or change delivery options go to:
http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com

Re: [MBZ] Type III ACC Questions

[clay via Mercedes]

Are you still looking for aspirator fans?

clay

On Mar 9, 2016, at 1:54 PM, Dan Penoff via Mercedes wrote:

> Drove to the dealer at lunch today to pick up some windshield wiper shaft 
> bushings and a couple of tubes of MB windshield washer concentrate.
> 
> Got AC and dash/center vents no problem, got pretty chilly.
> 
> On the drive home, I got center vents but no AC. Shut off the car at the dry 
> cleaners. Got AC and center vents no problem upon restarting. Stopped at 
> FLAPS to drop off the alternator core. After leaving, got center vents and AC 
> all the way home.
> 
> I'm going to put my wiper arms back on this evening, so I'll pull the KLIMA 
> and have a look, maybe even reflow the solder joints on it. If it's the 
> original, as I suspect it is, I would be willing to bet that it needs 
> reflowing and that this is the source of the intermittent compressor 
> operation.
> 
> Got a meter of power steering return line today, so I'll be replacing the 
> original/leaky lines on that, too.
> 
> Dan
> 
> Sent from my iPad
> 
>> On Mar 9, 2016, at 4:09 PM, Curly McLain via Mercedes 
>>  wrote:
>> 
>> It is next to the OVP  They generally say KLIMA on top.
>> 
>>> I wonder what's in the KLIMA relay that's rebuildable? Can't be much to 
>>> them if Programa sells a rebuild for $65.
>>> 
>>> Anyone vet open one up? Maybe a resolver and cap replacement is what's 
>>> necessary to bring them back into working order?
>>> 
>>> Also, is the KLIMA in the cowl behind the false firewall? I've seen the OVP 
>>> there.
>>> 
>>> Dan
>>> 
>>> Sent from my iPad
>>> 
>>> On Mar 8, 2016, at 10:57 PM, Curly McLain via Mercedes 
>>>  wrote:
>>> All my problems were the KLIMA relay.  The Beloved Herr Doktor argued with 
>>> me, and said the Klimas never failed (in his experience).  My experience 
>>> was that EVERY KLIMA fails.  OVP relay can cause wonky problems too.  I've 
>>> never had an OVP relay failYET!
 
>> 
>> 
>> ___
>> http://www.okiebenz.com
>> 
>> To search list archives http://www.okiebenz.com/archive/
>> 
>> To Unsubscribe or change delivery options go to:
>> http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
>> 
> 
> ___
> http://www.okiebenz.com
> 
> To search list archives http://www.okiebenz.com/archive/
> 
> To Unsubscribe or change delivery options go to:
> http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
> 


___
http://www.okiebenz.com

To search list archives http://www.okiebenz.com/archive/

To Unsubscribe or change delivery options go to:
http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com

Re: [MBZ] Type III ACC Questions

[Dan Penoff via Mercedes]

Drove to the dealer at lunch today to pick up some windshield wiper shaft 
bushings and a couple of tubes of MB windshield washer concentrate.

Got AC and dash/center vents no problem, got pretty chilly.

On the drive home, I got center vents but no AC. Shut off the car at the dry 
cleaners. Got AC and center vents no problem upon restarting. Stopped at FLAPS 
to drop off the alternator core. After leaving, got center vents and AC all the 
way home.

I'm going to put my wiper arms back on this evening, so I'll pull the KLIMA and 
have a look, maybe even reflow the solder joints on it. If it's the original, 
as I suspect it is, I would be willing to bet that it needs reflowing and that 
this is the source of the intermittent compressor operation.

Got a meter of power steering return line today, so I'll be replacing the 
original/leaky lines on that, too.

Dan

Sent from my iPad

> On Mar 9, 2016, at 4:09 PM, Curly McLain via Mercedes  
> wrote:
> 
> It is next to the OVP  They generally say KLIMA on top.
> 
>> I wonder what's in the KLIMA relay that's rebuildable? Can't be much to them 
>> if Programa sells a rebuild for $65.
>> 
>> Anyone vet open one up? Maybe a resolver and cap replacement is what's 
>> necessary to bring them back into working order?
>> 
>> Also, is the KLIMA in the cowl behind the false firewall? I've seen the OVP 
>> there.
>> 
>> Dan
>> 
>> Sent from my iPad
>> 
>> On Mar 8, 2016, at 10:57 PM, Curly McLain via Mercedes 
>>  wrote:
>> All my problems were the KLIMA relay.  The Beloved Herr Doktor argued with 
>> me, and said the Klimas never failed (in his experience).  My experience was 
>> that EVERY KLIMA fails.  OVP relay can cause wonky problems too.  I've never 
>> had an OVP relay failYET!
>> >
> 
> 
> ___
> http://www.okiebenz.com
> 
> To search list archives http://www.okiebenz.com/archive/
> 
> To Unsubscribe or change delivery options go to:
> http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
> 

___
http://www.okiebenz.com

To search list archives http://www.okiebenz.com/archive/

To Unsubscribe or change delivery options go to:
http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com

Re: [MBZ] Type III ACC Questions

[Curly McLain via Mercedes]

It is next to the OVP  They generally say KLIMA on top.

I wonder what's in the KLIMA relay that's rebuildable? Can't be much 
to them if Programa sells a rebuild for $65.


Anyone vet open one up? Maybe a resolver and cap replacement is 
what's necessary to bring them back into working order?


Also, is the KLIMA in the cowl behind the false firewall? I've seen 
the OVP there.


Dan

Sent from my iPad

On Mar 8, 2016, at 10:57 PM, Curly McLain via Mercedes 
 wrote:
All my problems were the KLIMA relay.  The Beloved Herr Doktor 
argued with me, and said the Klimas never failed (in his 
experience).  My experience was that EVERY KLIMA fails.  OVP relay 
can cause wonky problems too.  I've never had an OVP relay 
failYET!

 >



___
http://www.okiebenz.com

To search list archives http://www.okiebenz.com/archive/

To Unsubscribe or change delivery options go to:
http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com

Re: [MBZ] Type III ACC Questions

[Meade Dillon via Mercedes]

Jim,

Connector: I've checked all the female connectors to make sure they are
clean and grip tightly and the wire is securely soldered to the backside.
I think the next thing to try would be removing all the female connectors
from the socket and attaching them to the relay to see if the behavior
changes.

Thanks for the tip on the KD signal, I'll have to try that.

-
Max
Charleston SC

On Wed, Mar 9, 2016 at 9:26 AM, Jim Cathey  wrote:

> those connection solder joints, but there was no change in behavior.  If
>> light pressure is kept on the KLIMA relay by pushing a crushed plastic
>> water bottle between the relay and the battery, it works just fine.
>>
>
> Problem could be in the connector too, outside of the Klima.
> Did you look that over well?
>
> have lost the transmission kick-down feature, probably need to figure out
>> how to add another relay to restore that function.
>>
>
> Just an appropriate jumper wire in the connector, IIRC.  The KD
> signal goes through the Klima so that the Klima can cut off the
> compressor at WOT, while keeping the wiring harness point-to-point
> simple.
>
> -- Jim
>
>
___
http://www.okiebenz.com

To search list archives http://www.okiebenz.com/archive/

To Unsubscribe or change delivery options go to:
http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com

Re: [MBZ] Type III ACC Questions

[WILTON via Mercedes]

'Had to replace OVP on my 350SDL years ago; '87 300D KLIMA coupla years ago.

Wilton

- Original Message - 
From: "Kaleb C. Striplin via Mercedes" <mercedes@okiebenz.com>

To: "Mercedes Discussion List" <mercedes@okiebenz.com>
Cc: "Kaleb C. Striplin" <ka...@striplin.net>
Sent: Tuesday, March 08, 2016 11:26 PM
Subject: Re: [MBZ] Type III ACC Questions


Yes I have had them fail too, I am not sure how much they cost these 
days but might just replace it with a programa rebuilt one.


On 3/8/2016 9:57 PM, Curly McLain via Mercedes wrote:
Re. the compressor problem, 'been trying to remember name of relay 
that caused same problem on my '87 300D - a relay behind the 
battery.  Somebody help me remember its name.  Is it overvoltage 
relay?  Again, behind battery on '87 300D.
'Had same prob with compressor that Dan is having with '90 350SDL. I 
replaced that relay behind battery to cure prob.


Overvoltage relay on 350SDL is at  rear of engine comp. inward from 
fuse box.  Small rectangular unit  w/clear, plastic top, I think.


Wilton


All my problems were the KLIMA relay.  The Beloved Herr Doktor argued 
with me, and said the Klimas never failed (in his experience).  My 
experience was that EVERY KLIMA fails.  OVP relay can cause wonky 
problems too.  I've never had an OVP relay failYET!


___
http://www.okiebenz.com

To search list archives http://www.okiebenz.com/archive/

To Unsubscribe or change delivery options go to:
http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com




___
http://www.okiebenz.com

To search list archives http://www.okiebenz.com/archive/

To Unsubscribe or change delivery options go to:
http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com



___
http://www.okiebenz.com

To search list archives http://www.okiebenz.com/archive/

To Unsubscribe or change delivery options go to:
http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com

Re: [MBZ] Type III ACC Questions

[WILTON via Mercedes]

It was a bad KLIMA that caused problems with my 87 300D compressor coupla 
years ago.  Compressor would run for a while after starting car ('don't know 
HOW long - 'never sat and watched it), but it would quit sometime during a 
short "trip."  Restart car, and compressor would work again for a while, 
etc.  'Replacing KLIMA (behind battery) cured it.


Wilton

- Original Message - 
From: "Curly McLain via Mercedes" <mercedes@okiebenz.com>

To: "Mercedes Discussion List" <mercedes@okiebenz.com>
Cc: "Curly McLain" <126die...@gmail.com>
Sent: Tuesday, March 08, 2016 10:57 PM
Subject: Re: [MBZ] Type III ACC Questions


>Re. the compressor problem, 'been trying to remember name of relay that 
>caused same problem on my '87 300D - a relay behind the battery. 
>Somebody help me remember its name.  Is it overvoltage relay?  Again, 
>behind battery on '87 300D.
'Had same prob with compressor that Dan is having with '90 350SDL. I 
replaced that relay behind battery to cure prob.


Overvoltage relay on 350SDL is at  rear of engine comp. inward from fuse 
box.  Small rectangular unit  w/clear, plastic top, I think.


Wilton


All my problems were the KLIMA relay.  The Beloved Herr Doktor argued with 
me, and said the Klimas never failed (in his experience).  My experience 
was that EVERY KLIMA fails.  OVP relay can cause wonky problems too.  I've 
never had an OVP relay failYET!


___
http://www.okiebenz.com

To search list archives http://www.okiebenz.com/archive/

To Unsubscribe or change delivery options go to:
http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com




___
http://www.okiebenz.com

To search list archives http://www.okiebenz.com/archive/

To Unsubscribe or change delivery options go to:
http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com

Re: [MBZ] Type III ACC Questions

[Jim Cathey via Mercedes]

those connection solder joints, but there was no change in behavior.  
If

light pressure is kept on the KLIMA relay by pushing a crushed plastic
water bottle between the relay and the battery, it works just fine.


Problem could be in the connector too, outside of the Klima.
Did you look that over well?

have lost the transmission kick-down feature, probably need to figure 
out

how to add another relay to restore that function.


Just an appropriate jumper wire in the connector, IIRC.  The KD
signal goes through the Klima so that the Klima can cut off the
compressor at WOT, while keeping the wiring harness point-to-point
simple.

-- Jim


___
http://www.okiebenz.com

To search list archives http://www.okiebenz.com/archive/

To Unsubscribe or change delivery options go to:
http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com

Re: [MBZ] Type III ACC Questions

[Meade Dillon via Mercedes]

Jim, very impressive!

-
Max
Charleston SC

On Wed, Mar 9, 2016 at 9:17 AM, Jim Cathey via Mercedes <
mercedes@okiebenz.com> wrote:

> Anyone vet open one up? Maybe a resolder and cap replacement is what's
>> necessary to bring them back into working order?
>>
>
> Of course:
>
> http://formicapeak.com/~jimc/mb190dlog.html#4Aug2006
>
> -- Jim
>
>
>
___
http://www.okiebenz.com

To search list archives http://www.okiebenz.com/archive/

To Unsubscribe or change delivery options go to:
http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com

Re: [MBZ] Type III ACC Questions

[Meade Dillon via Mercedes]

I have opened up the KLIMA for my '95 sedan.  There is a little board with
at least one or two logic chips, transistor or two and some capacitors /
diodes / resistors etc.  I was trying to fix an intermittent connection
which causes the AC compressor to cut in and out.  The main board attaches
at a right angle to the connector board on the bottom; I re-flowed all
those connection solder joints, but there was no change in behavior.  If
light pressure is kept on the KLIMA relay by pushing a crushed plastic
water bottle between the relay and the battery, it works just fine.  "This
repair is only temporary, unless it works!".

No idea of location on a 126 car, but that is the location on my 124 cars.

On my wagon, the KLIMA prevented the AC compressor from coming on because
the circuit comparing the engine speed to the compressor speed would always
see a fault.  I suspect the main engine computer relay was providing a bad
engine speed signal.  The KLIMA is removed and replaced with a simple relay
that powers up the AC compressor clutch when called for.  Unfortunately I
have lost the transmission kick-down feature, probably need to figure out
how to add another relay to restore that function.
-
Max
Charleston SC

On Wed, Mar 9, 2016 at 8:36 AM, Dan Penoff via Mercedes <
mercedes@okiebenz.com> wrote:

> I wonder what's in the KLIMA relay that's rebuildable? Can't be much to
> them if Programa sells a rebuild for $65.
>
> Anyone vet open one up? Maybe a resolver and cap replacement is what's
> necessary to bring them back into working order?
>
> Also, is the KLIMA in the cowl behind the false firewall? I've seen the
> OVP there.
>
> Dan
>
>
___
http://www.okiebenz.com

To search list archives http://www.okiebenz.com/archive/

To Unsubscribe or change delivery options go to:
http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com

Re: [MBZ] Type III ACC Questions

[Jim Cathey via Mercedes]

Anyone vet open one up? Maybe a resolder and cap replacement is what's 
necessary to bring them back into working order?


Of course:

http://formicapeak.com/~jimc/mb190dlog.html#4Aug2006

-- Jim


___
http://www.okiebenz.com

To search list archives http://www.okiebenz.com/archive/

To Unsubscribe or change delivery options go to:
http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com

Re: [MBZ] Type III ACC Questions

[Kaleb C. Striplin via Mercedes]

It's right in from of the ovp behind the battery

Sent from my iPhone

> On Mar 9, 2016, at 7:36 AM, Dan Penoff via Mercedes  
> wrote:
> 
> I wonder what's in the KLIMA relay that's rebuildable? Can't be much to them 
> if Programa sells a rebuild for $65.
> 
> Anyone vet open one up? Maybe a resolver and cap replacement is what's 
> necessary to bring them back into working order?
> 
> Also, is the KLIMA in the cowl behind the false firewall? I've seen the OVP 
> there.
> 
> Dan
> 
> Sent from my iPad
> 
>> On Mar 8, 2016, at 10:57 PM, Curly McLain via Mercedes 
>>  wrote:
>> All my problems were the KLIMA relay.  The Beloved Herr Doktor argued with 
>> me, and said the Klimas never failed (in his experience).  My experience was 
>> that EVERY KLIMA fails.  OVP relay can cause wonky problems too.  I've never 
>> had an OVP relay failYET!
>> 
>> ___
>> http://www.okiebenz.com
>> 
>> To search list archives http://www.okiebenz.com/archive/
>> 
>> To Unsubscribe or change delivery options go to:
>> http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
> 
> ___
> http://www.okiebenz.com
> 
> To search list archives http://www.okiebenz.com/archive/
> 
> To Unsubscribe or change delivery options go to:
> http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
> 

___
http://www.okiebenz.com

To search list archives http://www.okiebenz.com/archive/

To Unsubscribe or change delivery options go to:
http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com

Re: [MBZ] Type III ACC Questions

[Dan Penoff via Mercedes]

I wonder what's in the KLIMA relay that's rebuildable? Can't be much to them if 
Programa sells a rebuild for $65.

Anyone vet open one up? Maybe a resolver and cap replacement is what's 
necessary to bring them back into working order?

Also, is the KLIMA in the cowl behind the false firewall? I've seen the OVP 
there.

Dan

Sent from my iPad

On Mar 8, 2016, at 10:57 PM, Curly McLain via Mercedes  
wrote:
All my problems were the KLIMA relay.  The Beloved Herr Doktor argued with me, 
and said the Klimas never failed (in his experience).  My experience was that 
EVERY KLIMA fails.  OVP relay can cause wonky problems too.  I've never had an 
OVP relay failYET!
> 
> ___
> http://www.okiebenz.com
> 
> To search list archives http://www.okiebenz.com/archive/
> 
> To Unsubscribe or change delivery options go to:
> http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
> 

___
http://www.okiebenz.com

To search list archives http://www.okiebenz.com/archive/

To Unsubscribe or change delivery options go to:
http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com

Re: [MBZ] Type III ACC Questions

[Kaleb C. Striplin via Mercedes]

Klima

Sent from my iPhone

> On Mar 9, 2016, at 7:14 AM, Dan Penoff via Mercedes  
> wrote:
> 
> KLIMA or over voltage relay?
> 
> Sent from my iPad
> 
>> On Mar 8, 2016, at 11:26 PM, Kaleb C. Striplin via Mercedes 
>>  wrote:
>> 
>> Yes I have had them fail too, I am not sure how much they cost these days 
>> but might just replace it with a programa rebuilt one.
> 
> ___
> http://www.okiebenz.com
> 
> To search list archives http://www.okiebenz.com/archive/
> 
> To Unsubscribe or change delivery options go to:
> http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
> 

___
http://www.okiebenz.com

To search list archives http://www.okiebenz.com/archive/

To Unsubscribe or change delivery options go to:
http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com

Re: [MBZ] Type III ACC Questions

[Dan Penoff via Mercedes]

KLIMA or over voltage relay?

Sent from my iPad

> On Mar 8, 2016, at 11:26 PM, Kaleb C. Striplin via Mercedes 
>  wrote:
> 
> Yes I have had them fail too, I am not sure how much they cost these days but 
> might just replace it with a programa rebuilt one.

___
http://www.okiebenz.com

To search list archives http://www.okiebenz.com/archive/

To Unsubscribe or change delivery options go to:
http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com

Re: [MBZ] Type III ACC Questions

[Kaleb C. Striplin via Mercedes]

Yes I have had them fail too, I am not sure how much they cost these 
days but might just replace it with a programa rebuilt one.


On 3/8/2016 9:57 PM, Curly McLain via Mercedes wrote:
Re. the compressor problem, 'been trying to remember name of relay 
that caused same problem on my '87 300D - a relay behind the 
battery.  Somebody help me remember its name.  Is it overvoltage 
relay?  Again, behind battery on '87 300D.
'Had same prob with compressor that Dan is having with '90 350SDL. I 
replaced that relay behind battery to cure prob.


Overvoltage relay on 350SDL is at  rear of engine comp. inward from 
fuse box.  Small rectangular unit  w/clear, plastic top, I think.


Wilton


All my problems were the KLIMA relay.  The Beloved Herr Doktor argued 
with me, and said the Klimas never failed (in his experience).  My 
experience was that EVERY KLIMA fails.  OVP relay can cause wonky 
problems too.  I've never had an OVP relay failYET!


___
http://www.okiebenz.com

To search list archives http://www.okiebenz.com/archive/

To Unsubscribe or change delivery options go to:
http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com




___
http://www.okiebenz.com

To search list archives http://www.okiebenz.com/archive/

To Unsubscribe or change delivery options go to:
http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com

Re: [MBZ] Type III ACC Questions

[Curly McLain via Mercedes]

Diesels ROCK, guys!  Had I been driving a vergasser I would have 
been stranded at the side of the road.


Dan


Uh, that is OLD Diesels ROCK, guys!  Had I been driving a vergasser I 
would have been stranded at the side of the road.   Mechanical Fuel 
Injection ROCKS!


Had you been driving vergasser OR a newer Dissel with electronic 
(computer) controlled injection,  you would have been F.O.R.D.


Clinging to my bibles and my OLD DIESELS!  But it is pillory and her 
pill-posse that are bitter clingers.


___
http://www.okiebenz.com

To search list archives http://www.okiebenz.com/archive/

To Unsubscribe or change delivery options go to:
http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com

Re: [MBZ] Type III ACC Questions

[Curly McLain via Mercedes]

Re. the compressor problem, 'been trying to remember name of relay 
that caused same problem on my '87 300D - a relay behind the 
battery.  Somebody help me remember its name.  Is it overvoltage 
relay?  Again, behind battery on '87 300D.
'Had same prob with compressor that Dan is having with '90 350SDL. 
I replaced that relay behind battery to cure prob.


Overvoltage relay on 350SDL is at  rear of engine comp. inward from 
fuse box.  Small rectangular unit  w/clear, plastic top, I think.


Wilton


All my problems were the KLIMA relay.  The Beloved Herr Doktor argued 
with me, and said the Klimas never failed (in his experience).  My 
experience was that EVERY KLIMA fails.  OVP relay can cause wonky 
problems too.  I've never had an OVP relay failYET!


___
http://www.okiebenz.com

To search list archives http://www.okiebenz.com/archive/

To Unsubscribe or change delivery options go to:
http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com

Re: [MBZ] Type III ACC Questions

[David Bruckmann via Mercedes]

If the W126 is anything like my W123 and W116 models, the centre vents only 
emit air when cooling, NOT when heating. So it makes sense that as the interior 
temperature approaches the target that the centre vents would emit air to begin 
to balance the interior temperatures.

Nothing to with what you're trying to figure out here, but I would also mention 
that unplugging the aux water pump (the unfused one that burns out and takes 
the pushbutton unit with) is a good idea. It's mostly unnecessary and see above 
re hazard. There are now fuse kits available, but again I've never seen the 
point of that pump and I've lived in some very cold places.

D.

___
http://www.okiebenz.com

To search list archives http://www.okiebenz.com/archive/

To Unsubscribe or change delivery options go to:
http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com

Re: [MBZ] Type III ACC Questions

[Max Dillon via Mercedes]

Bingo, 21 steps I think, section 83 of the service manual.

Lacking the special test rig, given a good wiring diagram and skillful use of a 
digital multi-meter, almost all of the tests can be replicated.
-- 
Max Dillon
Charleston SC
'87 300TD
'95 E300

On March 8, 2016 9:43:29 PM EST, "Kaleb C. Striplin via Mercedes" 
 wrote:
>..snip...
>At the end of the day there is a list of specific tests that must be
>done in order to isolate the peoblem
>
>

___
http://www.okiebenz.com

To search list archives http://www.okiebenz.com/archive/

To Unsubscribe or change delivery options go to:
http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com

Re: [MBZ] Type III ACC Questions

[Peter Frederick via Mercedes]

Iffy compressor operation can also be a slipping belt, which kicks out  
the KLIMA til restart -- easy enough to check, cycle the keyswitch and  
it will come back for a while.


Sadly, this can also be a bad compressor dragging when it's hot, I've  
had that happen to me.  Easy change if you can find a good one, but  
get a filter put into the suction side hose if you replace it.


Center vent is probably a vacuum issue, make sure you don't have a  
leak in something else up in the engine compartment that prevents full  
vac at the supply for the ACC.  Also check the switchover valves and  
associated elbows.


A shot of contact cleaner into the temp control wheel rheostat can  
work wonders too.


Verify that all the temp sensors are good -- a bad on at the  
evaporator that goes open when cold will shut the AC off too.


Peter

___
http://www.okiebenz.com

To search list archives http://www.okiebenz.com/archive/

To Unsubscribe or change delivery options go to:
http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com

Re: [MBZ] Type III ACC Questions

[WILTON via Mercedes]

NO, no!  It's KLIMA!  Just remembered!  KLIMA!

Wilton

- Original Message - 
From: "WILTON via Mercedes" <mercedes@okiebenz.com>

To: "Mercedes Discussion List" <mercedes@okiebenz.com>
Cc: "WILTON" <wilt...@nc.rr.com>
Sent: Tuesday, March 08, 2016 9:07 PM
Subject: Re: [MBZ] Type III ACC Questions


Re. the compressor problem, 'been trying to remember name of relay that 
caused same problem on my '87 300D - a relay behind the battery.  Somebody 
help me remember its name.  Is it overvoltage relay?  Again, behind 
battery on '87 300D.
'Had same prob with compressor that Dan is having with '90 350SDL.  I 
replaced that relay behind battery to cure prob.


Overvoltage relay on 350SDL is at  rear of engine comp. inward from fuse 
box.  Small rectangular unit  w/clear, plastic top, I think.


Wilton

- Original Message - 
From: "Dan Penoff via Mercedes" <mercedes@okiebenz.com>

To: "Mercedes List" <mercedes@okiebenz.com>
Cc: "Dan Penoff" <dpen...@verizon.net>
Sent: Tuesday, March 08, 2016 5:12 PM
Subject: [MBZ] Type III ACC Questions


As I get the 350SDL sorted out, I'm starting to turn towards the ACC 
system. It works, sort of, but has some quirks that I know are not right.


I'll be doing some research in the next couple of days to learn what I 
can but I figured I would toss things out here in the hope that maybe 
someone might recognize some of these and have some input. So here's 
what's going on:


The good:

Fan speeds seem to be good and somewhat temperature dependent. If the 
temp is set low and it's hot, you get high fan speed until things cool 
down, which is what it should be doing. Same in reverse with heat.


The various modes sort of work correctly for the most part (more on this 
later.). Heat comes out the floor, defrost out the top of the dash.


AC is charged and has proper pressures. Definitely gets cold.

The not so good:

Center vents are weird. They do work, but rarely. They only seem to come 
on during transitions when the system is close to the desired 
temperature. For example, when you want full cold, you get defroster 
vents, not center vents. When the system has almost reached the desired 
temperature, the center vents kick in. I think this is important to note 
since I realize that the system default is defrost - the center vents do 
work, just not for a lot of the time.


The aspirator fan wasn't working and the thermistor in the ceiling grille 
was filthy. It has been cleaned and I have the aspirator fan working.


When the AC is run, it comes on and makes plenty of cold. But - once the 
compressor cycles off the first time, it doesn't come back on until the 
car is shut off. So you get cold until it cools down, then you get 
ambient air - the compressor never comes back on.


The PO threw an evaporator temperature switch at the car, which they 
claim fixed the problem. It doesn't appear that's the case.


So, to summarize:

Center vents are wonky
AC compressor won't cycle back on

I'm all ears, folks. I know the Gen 1 ACC system, but the later system is 
a bit more complex and not something I'm familiar with.


Thanks,

Dan

Sent from my iPad
___
http://www.okiebenz.com

To search list archives http://www.okiebenz.com/archive/

To Unsubscribe or change delivery options go to:
http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com




___
http://www.okiebenz.com

To search list archives http://www.okiebenz.com/archive/

To Unsubscribe or change delivery options go to:
http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com




___
http://www.okiebenz.com

To search list archives http://www.okiebenz.com/archive/

To Unsubscribe or change delivery options go to:
http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com

Re: [MBZ] Type III ACC Questions

[Kaleb C. Striplin via Mercedes]

I'm not sure it has been a while 

Sent from my iPhone

> On Mar 8, 2016, at 8:28 PM, Dan Penoff via Mercedes  
> wrote:
> 
> I really don’t think I have any leaks.  I drove home tonight from the mother 
> in-law’s, which is about 50 miles, mostly interstate, and I was able to get 
> the system to change state based on he temperature setting.  The closer the 
> cabin temperature was to the setting, the more the center vents worked.
> 
> I would think if it was leaking it would be less predictable.  Maybe not, 
> that’s just the logic I’m working off of.
> 
> Now let’s throw a wrench in the proverbial gears:
> 
> So I get off the interstate and have about seven miles on surface streets to 
> get home.  As I pull up to a stop light, both my ABS and SRS lights come on.  
> Shoot.
> 
> As I get closer to home, the radio cuts out.  Then it comes on again.  Then 
> it cuts out.
> 
> Hmm.
> 
> Headlights look really dim.  Really dim.
> 
> Make the dash home with everything electrical turned off that I can think of. 
>  Pull into to the driveway, pop the hood, put a meter on the battery while 
> the engine is running.
> 
> 10.1 volts.  Not good.  Alternator has taken a dump.
> 
> Go inside, check with Advance Auto, they have a Carquest rebuilt in stock 
> five minutes away.  Have the youngster take me down there after I enter an 
> order online with a 40% off coupon.  get the rebuilt alternator, get back to 
> the ranch.  Change clothes, grab a quick snack since my last meal was lunch 
> (Indian, yum!) and then head out to the garage.
> 
> Start to finish: 40 minutes.
> 
> So I’m wondering if the electrical system issues could have affected the 
> compressor.  However, I turned the AC on and off several times on my trip 
> home with the temperature set all the way to “Cold” and every time I did it 
> the compressor came on and it got cold - real cold.
> 
> Kaleb - is the center vent vacuum pod one that has two sources of vacuum, or 
> just one?
> 
> Diesels ROCK, guys!  Had I been driving a vergasser I would have been 
> stranded at the side of the road.
> 
> Dan
> 
> 
> 
> 
> 
>> On Mar 8, 2016, at 6:34 PM, Kaleb C. Striplin via Mercedes 
>>  wrote:
>> 
>> Here are your problems. You have vacuum leaks somewhere. Could be the center 
>> vent element or could be be other places in the system. Sounds like it 
>> sometimes pulls enough vacuum to open the vent. As far as compressor goes 
>> that is the classic clutch issue. The sensor in the compressor senses it 
>> slipping and shuts it off. You can get shims I believe to tighten it up but 
>> otherwise replace compressor clutch.
>> 
>> Sent from my iPhone
> 
> 
> ___
> http://www.okiebenz.com
> 
> To search list archives http://www.okiebenz.com/archive/
> 
> To Unsubscribe or change delivery options go to:
> http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
> 

___
http://www.okiebenz.com

To search list archives http://www.okiebenz.com/archive/

To Unsubscribe or change delivery options go to:
http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com

Re: [MBZ] Type III ACC Questions

[Kaleb C. Striplin via Mercedes]

The Klima relay cuts the compressor off if it gets the slipping signal. At the 
end of the day there is a list of specific tests that must be done in order to 
isolate the peoblem

Sent from my iPhone

> On Mar 8, 2016, at 8:07 PM, WILTON via Mercedes  wrote:
> 
> Re. the compressor problem, 'been trying to remember name of relay that 
> caused same problem on my '87 300D - a relay behind the battery.  Somebody 
> help me remember its name.  Is it overvoltage relay?  Again, behind battery 
> on '87 300D.
> 'Had same prob with compressor that Dan is having with '90 350SDL.  I 
> replaced that relay behind battery to cure prob.
> 
> Overvoltage relay on 350SDL is at  rear of engine comp. inward from fuse box. 
>  Small rectangular unit  w/clear, plastic top, I think.
> 
> Wilton
> 
> - Original Message - From: "Dan Penoff via Mercedes" 
> 
> To: "Mercedes List" 
> Cc: "Dan Penoff" 
> Sent: Tuesday, March 08, 2016 5:12 PM
> Subject: [MBZ] Type III ACC Questions
> 
> 
>> As I get the 350SDL sorted out, I'm starting to turn towards the ACC system. 
>> It works, sort of, but has some quirks that I know are not right.
>> 
>> I'll be doing some research in the next couple of days to learn what I can 
>> but I figured I would toss things out here in the hope that maybe someone 
>> might recognize some of these and have some input. So here's what's going on:
>> 
>> The good:
>> 
>> Fan speeds seem to be good and somewhat temperature dependent. If the temp 
>> is set low and it's hot, you get high fan speed until things cool down, 
>> which is what it should be doing. Same in reverse with heat.
>> 
>> The various modes sort of work correctly for the most part (more on this 
>> later.). Heat comes out the floor, defrost out the top of the dash.
>> 
>> AC is charged and has proper pressures. Definitely gets cold.
>> 
>> The not so good:
>> 
>> Center vents are weird. They do work, but rarely. They only seem to come on 
>> during transitions when the system is close to the desired temperature. For 
>> example, when you want full cold, you get defroster vents, not center vents. 
>> When the system has almost reached the desired temperature, the center vents 
>> kick in. I think this is important to note since I realize that the system 
>> default is defrost - the center vents do work, just not for a lot of the 
>> time.
>> 
>> The aspirator fan wasn't working and the thermistor in the ceiling grille 
>> was filthy. It has been cleaned and I have the aspirator fan working.
>> 
>> When the AC is run, it comes on and makes plenty of cold. But - once the 
>> compressor cycles off the first time, it doesn't come back on until the car 
>> is shut off. So you get cold until it cools down, then you get ambient air - 
>> the compressor never comes back on.
>> 
>> The PO threw an evaporator temperature switch at the car, which they claim 
>> fixed the problem. It doesn't appear that's the case.
>> 
>> So, to summarize:
>> 
>> Center vents are wonky
>> AC compressor won't cycle back on
>> 
>> I'm all ears, folks. I know the Gen 1 ACC system, but the later system is a 
>> bit more complex and not something I'm familiar with.
>> 
>> Thanks,
>> 
>> Dan
>> 
>> Sent from my iPad
>> ___
>> http://www.okiebenz.com
>> 
>> To search list archives http://www.okiebenz.com/archive/
>> 
>> To Unsubscribe or change delivery options go to:
>> http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
> 
> 
> ___
> http://www.okiebenz.com
> 
> To search list archives http://www.okiebenz.com/archive/
> 
> To Unsubscribe or change delivery options go to:
> http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
> 

___
http://www.okiebenz.com

To search list archives http://www.okiebenz.com/archive/

To Unsubscribe or change delivery options go to:
http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com

Re: [MBZ] Type III ACC Questions

[Dan Penoff via Mercedes]

ACC panel has been inspected and verified to be in good operating order - I 
checked it last weekend.  Interestingly, the Gen 2 W126 models have a slightly 
redesigned ACC controller that eliminated the right angle joints that were 
soldered.  The later models have the plugs and everything on a single board.

Thanks!

Dan


> On Mar 8, 2016, at 9:33 PM, Jim Cathey  wrote:
> 
> The ACC panel can have bad solder joints, but I have seen
> 126 problems with the vacuum switch array (behind PBU) losing
> electrical continuity on some of the valves.  And there's
> always vacuum leaks in the actuators to contend with.
> 
> -- Jim
> 


___
http://www.okiebenz.com

To search list archives http://www.okiebenz.com/archive/

To Unsubscribe or change delivery options go to:
http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com

Re: [MBZ] Type III ACC Questions

[Jim Cathey via Mercedes]

The ACC panel can have bad solder joints, but I have seen
126 problems with the vacuum switch array (behind PBU) losing
electrical continuity on some of the valves.  And there's
always vacuum leaks in the actuators to contend with.

-- Jim


___
http://www.okiebenz.com

To search list archives http://www.okiebenz.com/archive/

To Unsubscribe or change delivery options go to:
http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com

Re: [MBZ] Type III ACC Questions

[Jim Cathey via Mercedes]

Re. the compressor problem, 'been trying to remember name of relay 
that caused same problem on my '87 300D - a relay behind the battery.


Klima.

-- Jim


___
http://www.okiebenz.com

To search list archives http://www.okiebenz.com/archive/

To Unsubscribe or change delivery options go to:
http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com

Re: [MBZ] Type III ACC Questions

[Dan Penoff via Mercedes]

I really don’t think I have any leaks.  I drove home tonight from the mother 
in-law’s, which is about 50 miles, mostly interstate, and I was able to get the 
system to change state based on he temperature setting.  The closer the cabin 
temperature was to the setting, the more the center vents worked.

I would think if it was leaking it would be less predictable.  Maybe not, 
that’s just the logic I’m working off of.

Now let’s throw a wrench in the proverbial gears:

So I get off the interstate and have about seven miles on surface streets to 
get home.  As I pull up to a stop light, both my ABS and SRS lights come on.  
Shoot.

As I get closer to home, the radio cuts out.  Then it comes on again.  Then it 
cuts out.

Hmm.

Headlights look really dim.  Really dim.

Make the dash home with everything electrical turned off that I can think of.  
Pull into to the driveway, pop the hood, put a meter on the battery while the 
engine is running.

10.1 volts.  Not good.  Alternator has taken a dump.

Go inside, check with Advance Auto, they have a Carquest rebuilt in stock five 
minutes away.  Have the youngster take me down there after I enter an order 
online with a 40% off coupon.  get the rebuilt alternator, get back to the 
ranch.  Change clothes, grab a quick snack since my last meal was lunch 
(Indian, yum!) and then head out to the garage.

Start to finish: 40 minutes.

So I’m wondering if the electrical system issues could have affected the 
compressor.  However, I turned the AC on and off several times on my trip home 
with the temperature set all the way to “Cold” and every time I did it the 
compressor came on and it got cold - real cold.

Kaleb - is the center vent vacuum pod one that has two sources of vacuum, or 
just one?

Diesels ROCK, guys!  Had I been driving a vergasser I would have been stranded 
at the side of the road.

Dan





> On Mar 8, 2016, at 6:34 PM, Kaleb C. Striplin via Mercedes 
>  wrote:
> 
> Here are your problems. You have vacuum leaks somewhere. Could be the center 
> vent element or could be be other places in the system. Sounds like it 
> sometimes pulls enough vacuum to open the vent. As far as compressor goes 
> that is the classic clutch issue. The sensor in the compressor senses it 
> slipping and shuts it off. You can get shims I believe to tighten it up but 
> otherwise replace compressor clutch.
> 
> Sent from my iPhone
> 


___
http://www.okiebenz.com

To search list archives http://www.okiebenz.com/archive/

To Unsubscribe or change delivery options go to:
http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com

Re: [MBZ] Type III ACC Questions

[WILTON via Mercedes]

Re. the compressor problem, 'been trying to remember name of relay that 
caused same problem on my '87 300D - a relay behind the battery.  Somebody 
help me remember its name.  Is it overvoltage relay?  Again, behind battery 
on '87 300D.
'Had same prob with compressor that Dan is having with '90 350SDL.  I 
replaced that relay behind battery to cure prob.


Overvoltage relay on 350SDL is at  rear of engine comp. inward from fuse 
box.  Small rectangular unit  w/clear, plastic top, I think.


Wilton

- Original Message - 
From: "Dan Penoff via Mercedes" 

To: "Mercedes List" 
Cc: "Dan Penoff" 
Sent: Tuesday, March 08, 2016 5:12 PM
Subject: [MBZ] Type III ACC Questions


As I get the 350SDL sorted out, I'm starting to turn towards the ACC 
system. It works, sort of, but has some quirks that I know are not right.


I'll be doing some research in the next couple of days to learn what I can 
but I figured I would toss things out here in the hope that maybe someone 
might recognize some of these and have some input. So here's what's going 
on:


The good:

Fan speeds seem to be good and somewhat temperature dependent. If the temp 
is set low and it's hot, you get high fan speed until things cool down, 
which is what it should be doing. Same in reverse with heat.


The various modes sort of work correctly for the most part (more on this 
later.). Heat comes out the floor, defrost out the top of the dash.


AC is charged and has proper pressures. Definitely gets cold.

The not so good:

Center vents are weird. They do work, but rarely. They only seem to come 
on during transitions when the system is close to the desired temperature. 
For example, when you want full cold, you get defroster vents, not center 
vents. When the system has almost reached the desired temperature, the 
center vents kick in. I think this is important to note since I realize 
that the system default is defrost - the center vents do work, just not 
for a lot of the time.


The aspirator fan wasn't working and the thermistor in the ceiling grille 
was filthy. It has been cleaned and I have the aspirator fan working.


When the AC is run, it comes on and makes plenty of cold. But - once the 
compressor cycles off the first time, it doesn't come back on until the 
car is shut off. So you get cold until it cools down, then you get ambient 
air - the compressor never comes back on.


The PO threw an evaporator temperature switch at the car, which they claim 
fixed the problem. It doesn't appear that's the case.


So, to summarize:

Center vents are wonky
AC compressor won't cycle back on

I'm all ears, folks. I know the Gen 1 ACC system, but the later system is 
a bit more complex and not something I'm familiar with.


Thanks,

Dan

Sent from my iPad
___
http://www.okiebenz.com

To search list archives http://www.okiebenz.com/archive/

To Unsubscribe or change delivery options go to:
http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com




___
http://www.okiebenz.com

To search list archives http://www.okiebenz.com/archive/

To Unsubscribe or change delivery options go to:
http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com

Re: [MBZ] Type III ACC Questions

[Kaleb C. Striplin via Mercedes]

Here are your problems. You have vacuum leaks somewhere. Could be the center 
vent element or could be be other places in the system. Sounds like it 
sometimes pulls enough vacuum to open the vent. As far as compressor goes that 
is the classic clutch issue. The sensor in the compressor senses it slipping 
and shuts it off. You can get shims I believe to tighten it up but otherwise 
replace compressor clutch.

Sent from my iPhone

> On Mar 8, 2016, at 4:12 PM, Dan Penoff via Mercedes  
> wrote:
> 
> As I get the 350SDL sorted out, I'm starting to turn towards the ACC system. 
> It works, sort of, but has some quirks that I know are not right.
> 
> I'll be doing some research in the next couple of days to learn what I can 
> but I figured I would toss things out here in the hope that maybe someone 
> might recognize some of these and have some input. So here's what's going on:
> 
> The good:
> 
> Fan speeds seem to be good and somewhat temperature dependent. If the temp is 
> set low and it's hot, you get high fan speed until things cool down, which is 
> what it should be doing. Same in reverse with heat.
> 
> The various modes sort of work correctly for the most part (more on this 
> later.). Heat comes out the floor, defrost out the top of the dash.
> 
> AC is charged and has proper pressures. Definitely gets cold.
> 
> The not so good:
> 
> Center vents are weird. They do work, but rarely. They only seem to come on 
> during transitions when the system is close to the desired temperature. For 
> example, when you want full cold, you get defroster vents, not center vents. 
> When the system has almost reached the desired temperature, the center vents 
> kick in. I think this is important to note since I realize that the system 
> default is defrost - the center vents do work, just not for a lot of the time.
> 
> The aspirator fan wasn't working and the thermistor in the ceiling grille was 
> filthy. It has been cleaned and I have the aspirator fan working.
> 
> When the AC is run, it comes on and makes plenty of cold. But - once the 
> compressor cycles off the first time, it doesn't come back on until the car 
> is shut off. So you get cold until it cools down, then you get ambient air - 
> the compressor never comes back on.
> 
> The PO threw an evaporator temperature switch at the car, which they claim 
> fixed the problem. It doesn't appear that's the case.
> 
> So, to summarize:
> 
> Center vents are wonky
> AC compressor won't cycle back on
> 
> I'm all ears, folks. I know the Gen 1 ACC system, but the later system is a 
> bit more complex and not something I'm familiar with.
> 
> Thanks,
> 
> Dan
> 
> Sent from my iPad
> ___
> http://www.okiebenz.com
> 
> To search list archives http://www.okiebenz.com/archive/
> 
> To Unsubscribe or change delivery options go to:
> http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
> 

___
http://www.okiebenz.com

To search list archives http://www.okiebenz.com/archive/

To Unsubscribe or change delivery options go to:
http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com