1990 Mercedes-Benz 420SEL Repair and Maintenance

A guide to problems, costs, maintenance and repair for your 1990 Mercedes-Benz 420SEL

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1990 Mercedes-Benz 420SEL Problems

Bad Switch/Blower Motor Resistor Assembly May Cause Inoperative Heater Blower Motor

Other than a defective motor, a bad switch or blower motor resistor assembly can cause an inoperative heater blower motor.

Incorrect Idle Speed Due to Stuck Idle Air Compensator

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.

AC Not Cold Due to Leaking Hose

A refrigerant leak may develop from one or more of the AC hoses. Proper leak detection procedures should be followed if refrigerant loss in encountered. Replacement of any leaking hoses will we required to restore proper AC operation.

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1990 Mercedes-Benz 420SEL Reviews

Rated
based on 1 customer reviews
what other automobile would you even consider that has 150k miles and still cost $5k or better..and get a consistent thumbs up!

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