Stuck Idle Air Compensator May Cause Too High/Too Low RPM on Mercedes-Benz 420SEL
Problem overview
It is not uncommon for the idle air compensator to get stuck in one position, resulting in the engine idle speed (rpm) being too high or too low. Replacement of the failed compensator may be necessary to correct this concern.
9 people reported this problem
5 commentsMercedes-Benz 420SEL vehicles with this problem
Average mileage: 137,903 miles
(58,000 - 210,000)
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