I pulled all of my door panels this afternoon and found the culprit in my ailing central locking system! The driver's side rear door had a torn diaphragm on the vacuum actuator. Replaced it with one I've had sitting around from a parts car, and now they work like a charm! I'll have to try again in a few hours, to see if it holds vacuum over time.

Mike

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1979 300 SD
350,000 miles
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1982 300D-gone---sold to a buddy
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1985 300TD
270,000 miles
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1994 E320
not my favorite, but the wife wanted it

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