1990 Mercedes-Benz 560SEC Repair and Maintenance

A guide to problems, costs, maintenance and repair for your 1990 Mercedes-Benz 560SEC

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1990 Mercedes-Benz 560SEC 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.

Rough Running Engine Due to Misfire

A rough running motor or lack of power can be caused by a failed distributor cap or rotor, ignition wires (or their resistors), or valve cover gasket leaks. If the valve cover gasket leaks, oil can pool where the ignition wire resistor connects to the spark plug. The resistor can fail and the spark plug may not fire because of a short circuit through the oil.

Catalytic Converter Failure Due to Engine Burning Oil

Valve stem seals may wear and cause the engine to burn oil. this can contaminate the catalytic converter and cause it to fail.

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1990 Mercedes-Benz 560SEC Questions

1987 560 SEC, unable to adjust both front seats via switches on the door fuse ok (1 answer)

I checked fuses they are not blown, what should I look for next? Any suggestions? Since both front seats can not be adjusted I am wondering if a wiring issue or module may be out. Where can I go in the car to check?

Is it possible to drop in a modern AMG engine into a 560sec (2 answers)

Is it possible to drop in a modern AMG engine into a 560sec (or any model from 2000 motors kompressor

i want to ask if i can put a new motor in mercedes 560sec from w203 kompressor (1 answer)

or any new engineer from 2004 kompressor to 560sec

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