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Old 03-14-2001, 05:51 PM
Coming back from burnout
Join Date: Jun 1999
Location: in the Pacific Northwest
Posts: 2,274
I recently rpaird the vacuum door lock system on my 83 240D. The check valve was dead in the engine compartment, and one line was misrouted from when I reinstalled engine fter rebuilding. The system was working 1/2 fine--it only worked when car was running, not after motor stopped.I was going to finish fixing in springtime when i got warmer.

Also, the other day, the passenger door refused to lock, and I had to pull the vacuum lines from the rubber 4 way connectors in the floor to bleed it. There was still quite a bit of vacuum there.

Are my lines misrouted? Do i have to adjust the door vacuum switch? I hate messing with Mercedes trim, I'm scared of scartching it!!!

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Old 03-14-2001, 08:36 PM
Registered User
Join Date: Mar 1999
Location: Suwanee, GA, USA
Posts: 4,712
I have seen the vacuum reservoir leak. It is in the trunk on yours, I think.

You have a leak for sure.

The CD should have all of the routing information on it.
Donnie Drummonds
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Old 03-14-2001, 08:43 PM
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Join Date: Jan 2001
Location: Tucson, Arizona
Posts: 758
Just a suggestion for a quick fix

Greetings All,

I think Don is right, you have a leak in the reservoir. I've tinkered with mine to get all vacuum valves to work properly. I think if you pressurize the holding cell with compressed air, (don't get carried away now), you can probably do a soap and water leak test on the holding cell. A little JB weld on the leak if you find one will probably fix your problem. If you find no leak please respond back for additional help.

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