My guess would be one or more of the following for your car:
1) Broken solder joints in your climate control computer
(intermittent functionality)
2) Deteriorated/missing hose that connects the cabin air temp sensor
to the air box (delayed temperature regulation)
3) Leaking vacuum pods and/or lines (improper air direction)
4) Faulty monovalve (max heat, or no heat, depending)
It took me a while to sort out the issues on my '82 300CD climate
control. I ended up fixing and/or replacing all of the above at one
time or another.
Good luck.
J.B.
At 11:01 AM 10/28/2005, you wrote:
On my 83' 300D, I've heard so many stories about the climate control not
working that I have a hard time telling whether mine is working or not.
This center vent thing kind of answers a potential question, though I'm not
sure I ever got much out of them in the summer either...
It *generally* seems to heat and cool automatically. Though periodically if
I leave it on, when I start the car it decides to just turn the fan on full
blast with a cold engine when it's supposed to be warming.
Also on a couple occasions during the summer it was cooling nicely. Then at
some point decided that since it was 90 degrees out and I asked for 72, that
I must want maximum heat.
But not paying attention to those oddities, The controls themselves and what
the manual says seems odd. The defrost button is only ever max fan with max
heat? I can only imagine that the theory is that the only time you need that
is when you're really cold and frosted badly?
and I *thought* the way I understood it looking at the buttons that all the
buttons would blow most air to lower vents, but the one next to the defrost
button would blow top and bottom. On my car, that one is the ONLY one that
I've noticed air blowing at my legs. The others with arrows pointing down
only blow out the upper vents. And as mentioned with the center vents, it
generally all comes out of the defroster vents and/or side vents.
The other thing I'm thinking of is that it seems like once it gets to about
the right temp it starts blowing *slightly cool* air in the winter or
*slightly warm* air in the summer. Not terribly badly, but enough where I
frequently notice it and it seems like it should just shut itself off if
it's going to be just gently blowing the wrong temperature air at me...
I guess I was just curious if anyone has enough understanding of the system
so that they could give me some insight as to whether this is either:
-How they are supposed to function
-How they normally function
-Messed up
Or
-Some other combination of things.
Thanks!
Levi (:
On 10/28/05, J.B. Hebert <[EMAIL PROTECTED]> wrote:
>
> The center vents are for A/C and non-heated fresh air venting. Not
> 100% sure why the system was designed this way, but MB stuck with it
> at least through the 124 chassis cars.
>
> J.B.
>
>
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