I did get the servo working pretty well using parts from another couple. of them. Not sure if it is perfectly calibrated, though. My most pressing but not so severe vacuum issue at this time is that when I shut off key the engine doesn't shut down immediately...it takes about 2 seconds to slowly shake to a stop -- IF the climate control is set to OFF. Otherwise, it shuts right down. I've adopted the habit of just pressing lo or hi before shutting off the key and everything seems to work fine. I would like to find out where the leak is, but I can't figure it out. I've tried blocking lines, changing the pushbuttons, and more...but no luck. If anyone needs advice on how to fix a servo, let me know...I got pretty good at it.

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1980 300SD (daily driver), 1981 300D (Inca Red)