I have never chased down a vaccum leak but now have one and want to do it myself.

The door locks on the passenger and both rear doors do not work with the key until the car has run a little and the transmission shifts are little hard. In the past, fixing the leaks has fixed both these problems.

Previous postings have indicated that if you are not careful, the plastic door clips will break when taking off the door panels. My cars are 26 and 30 years old and I have no doubt but that if I take off the panels, at least one clip will break.

Are these readily available? Are they interchangeable between several models of older cars (1977 240d and 1980 300sd)? I would like to get at least a few before tackling this job.