FREE REPAIR MANUALS & LABOR GUIDES 1982-2013 Vehicles
Courtesy of Operation CHARM
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Car repair manuals for everyone.
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Mercedes Benz
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1990
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300E 4MATIC (124.230) L6-3.0L (103.985)
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Repair and Diagnosis
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Symptom Related Diagnostic Procedures
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Blower Speed Incorrect
Blower Speed Incorrect
SYMPTOM DESCRIPTION:
Blower motor
speed fluctuates or runs at half speed. Whistling sound in the area of the blower motor.
CAUSE/REMEDY:
^
BLOWER
REGULATOR DEFECTIVE. Replace the regulator.