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Old 08-07-2001, 05:13 PM
mbdoc mbdoc is offline
Join Date: Mar 1999
Location: Tucker, Ga USA
Posts: 12,153
The early C-class had a recall on the sunroof as most of them failed due to poor design on the lifting angles up to chassis # 025776!
The most common reason the center vent closes under acceleration is a failure of the fresh air vacuum diaphram. Try using the EC button & if the center vent stays open you will know that the fresh air diaphram is the cause.
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