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1990 Mercedes-Benz 420SEL Problems

Find the most common issues based on car owner complaints

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Most Common 1990 Mercedes-Benz 420SEL Problems

Other than a defective motor, a bad switch or blower motor resistor assembly can cause an inoperative heater blower motor.
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.
The fuel pump and/or fuel pump relay can fail, causing the car to crank over but not start.
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2 Known 1990 Mercedes-Benz 420SEL Brake Problems

4 Known 1990 Mercedes-Benz 420SEL Drive Train Problems

2 Known 1990 Mercedes-Benz 420SEL Electrical & Lights Problems

3 Known 1990 Mercedes-Benz 420SEL Engine Problems

2 Known 1990 Mercedes-Benz 420SEL Exhaust & Emissions Problems

5 Known 1990 Mercedes-Benz 420SEL Heating & Air Conditioning Problems

2 Known 1990 Mercedes-Benz 420SEL Miscellaneous Problems

4 Known 1990 Mercedes-Benz 420SEL Suspension & Steering Problems

24 Known 1990 Mercedes-Benz 420SEL Problems

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