In the meantime run 6ft of vac hose from the shutoff through the firewall into 
the cabin so you can suck on it to shut it off. Much easier that doing the hood 
dance 

--FT
Sent from iFōn

> On Nov 15, 2021, at 4:29 PM, Allan Streib via Mercedes 
> <mercedes@okiebenz.com> wrote:
> 
> Yeah that's the plan. Want to get the engine stop working at least. The rest 
> is just convenience.
> 
> Allan
> 
>> On Mon, Nov 15, 2021, at 4:04 PM, Scott Ritchey via Mercedes wrote:
>> I don't know the W116 but diagnosing 123/126 model vacuum is not hard.  Miti
>> Vac, golf tees, vacuum diagram, and a short piece of rubber hose is all
>> that's needed.  Access to all key junctions was under the passenger floor
>> mat.  But even before that, visually inspect the lines in the engine
>> compartment.  I had a possum that took shelter there (W126) but disconnected
>> several vacuum connections. 
>> 
>> -----Original Message-----
>> From: Mercedes On Behalf Of Allan Streib via Mercedes
>> Sent: Monday, November 15, 2021 2:21 PM
>> To: Mercedes Discussion List <mercedes@okiebenz.com>
>> Cc: Allan Streib <astr...@fastmail.fm>
>> Subject: [MBZ] sudden total vacuum loss
>> 
>> Arrived at the dentist today for a tooth extraction, driving the W116 300SD.
>> Had to pop the hood and use the stop lever to shut off the engine. Door
>> locks don't work either. Everything was fine the last time I drove the car a
>> few hours prior.
>> 
>> Probably not going to mess with it much today but guess I need to find the
>> mity-vac and see what's going on. The passenger door lock has been
>> misbehaving for a while (locks initially but will be unlocked later)  but so
>> far that hasn't affected the engine stop.
>> 
>> Allan
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