I looked through the vacuum diagram thread, but couldn't find the diagrams for my vehicle. I've got a slow vacuum leak somewhere that causes intermittent vacuum issues. I also have one in the Climate control system somewhere, as my defrost is the only functional vent setting..

Can anyone send me the vacuum diagrams for the whole car? I am about to embark on a vacuum leak quest....


Nick
1981 300sd 235k miles

You may be able to find something in a sticky, search around.

The door lock system is completely separate from the engine and HVAC.

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83 SD

84 CD

Sorry, i should be more clear. I looked through the sticky...

Found several 83 300sd diagrams, even a 1980, but as I understand it, 1981 changed the body style and vacuum layout, and then they changed the vacuum system more sometime between 83-85 somewhere. I could be wrong there. If someone can tell me that the 83' diagrams are the same, i'd be a happy camper.

I would think the 81 would be the same as an 83, the change came in 1985.

My CCU has a leak somewhere too, I believe I'd have to pull the dash to find it.

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83 SD

84 CD