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Old 01-13-2001, 08:00 AM
mbdoc mbdoc is offline
Join Date: Mar 1999
Location: Tucker, Ga USA
Posts: 12,153
Sounds like the central locking pump is running. MB uses this pump for many duties, including manifold assist. IF there is a vacuum leak in A/C system then this pump will help supply vacuum so that ducts can open & close. The pump is in the trunk on the rt side behind the carpet. LIsten & see if its running. The reason it shuts off after 5-10 minutes is thermal overload protection. NOT good.
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