[island911]

All good advice above.

A few days ago I bought a 77 240D for my niece. The great thing about Mercedes is that EVERYTHING is serviceable. Interior bits need a bit of trickery to disassemble. You can buy the factory manuals on disk from Mercedes for cheap.

The costly parts ar those which are missing or completely worn-out or broken. Most everything is tough.

I happen to be tracking-down a vacuum leak. It's not that bad to figure out...should have started with the trunk-lock actuator (seems to be the weak link in the system -- a thin rubber boot/bellow) Anyway, I'll also note that the lines are color coded - Yellow with red is to pull the locks, locked. And the yellow /w green is unlock. There are three door lock actuators, plus a trunk and gas cap door actuator. One just tests each actuator.