It started with the car not shutting off (1985 300TDT). No problem, I know about the stop lever. So I take it to an MB independent. They are a bit far from home and I have no easy way to drop the car off, and they are busy. I wait for it and they track it down to the door circuit. But it's getting late, and they might not be able to get parts to finish it that day. So they say they can block it and I can bring it back. What I'm really thinking is I imagine that it must be the master vacuum switch in the door and I will fix it myself.

So that's where I am at. I am not skilled enough to track down a vacuum leak that could be anywhere, but now that I have a better idea of where it is, I think I can handle it. I read the "Diesel Giant" page about replacing the part.

My questions, should I just go ahead and replace the master vacuum switch and see if that fixes it? I imagine it is a cheap part and probably due for a change.

Or should I try to track the problem down a bit further?

Do I need a mighty vac?

Thanks

Peter