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Old 03-05-2001, 05:46 PM
mbdoc mbdoc is offline
Join Date: Mar 1999
Location: Tucker, Ga USA
Posts: 12,153
On almost all MB's the air pump is a WARM-UP device! Allows the O2 sensor & catalyst to heat up quicker, so the warm up emissions are lower! On your car it has nothing to do with any other emission control, only works w/cold engine.
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