Hello, all,

I've done a search on this topic for the W202, and it seems earlier posters have had a slightly different problem from mine.

The locks on my '97 C230 work fine, both locking and unlocking. However, in the last month or so, when I lock or unlock the doors (either with the key fob, a key in the passenger door lock, or via the dash switch), I hear a fairly loud "thuttering" sound which appears to come from the passenger side rear door. Behind this, I know, is where the vacuum pump is located. However, unlike the other posts I've read, the vacuum pump does not keep on running after the doors are locked/unlocked.

Is this a sign of trouble to come? Rubber seals going? How can I get to the vacuum pump, and what do I look for (yellow hoses are the ones for the pump, right)?

TIA,

__________________
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-- Paul W. (The Benzadmiral)
('03 Buick Park Avenue, charcoal/cream)
Formerly:
'97 C230, smoke silver/parchment; '86 420SEL, anthracite/light grey; '84 280CE (W123), dark blue/palomino