1990 Mercedes-Benz 300SEL Repair and Maintenance

A guide to problems, costs, maintenance and repair for your 1990 Mercedes-Benz 300SEL

Get a Repair Estimate
Guaranteed by certified locations nationwide. Learn more
Get a Repair Estimate For Your 1990 Mercedes-Benz 300SEL
RepairPal estimates are guaranteed at over 1,700 quality certified locations nationwide. Learn more

1990 Mercedes-Benz 300SEL Problems

Fuel system components may leak and cause hard starting problems
Leaks from the fuel pressure accumulator or a faulty cold start fuel injector (fuel system components) can cause hard starting 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.

See More Problems (29)