Hello All:

I have a 1985 300D with a vacuum issue. I had a run-on engine, and traced the problem to the master vacuum switch in the driver's door. I replaced the switch and now the engine shuts off immediately. Problem is, now the vacuum door locks don't work. I drove the car a few miles, turned off the car; engine shut off immediately. I though all was well, but when I attempted to lock the doors, only the driver's door locked.

Any suggestions? Given that the engine shuts off immediately, I doubt there's a significant leak in any of the doors' actuators...? Is it possible I have the three lines going to the main switch incorrectly installed? Can anyone confirm the "correct" placement?

Thanks in advance for any help!

Stephen

1985 300D
1999 Audi A4