Thread: W140 rough idle
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Old 03-16-2001, 08:14 AM
mbdoc mbdoc is offline
Join Date: Mar 1999
Location: Tucker, Ga USA
Posts: 12,153
On this car & most after 1982 there aren't any idle adjustments. All computer controlled. Some cars upto 1993 could change fuel mixture but the computer still had control of mixture. If your car has rough idle OR feels that way the MOTOR mounts may be failing. They are hydraulic.
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