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Old 03-19-2003, 03:53 PM
mbdoc mbdoc is offline
Join Date: Mar 1999
Location: Tucker, Ga USA
Posts: 12,153
On the cars 1981 & later MB's the air pump is used as a "warm-up" device. Causes the catalytic converter to come on-line more quickly. So that the O2 sensor & computer can take charge of the amount of emissions produced.
MERCEDES Benz Master Guild Technician (6 TIMES)
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