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Old 02-06-2002, 08:11 AM
mbdoc mbdoc is offline
Join Date: Mar 1999
Location: Tucker, Ga USA
Posts: 12,153
I ASSume that this problem is on the C-class. The fresh air vent vacuum diaphram is a common failure on this car. TRY using the "ec" button when this happens. IF the problem goes away then you need to have that vacuum element checked!
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