1990 Mercedes-Benz 300E Repair and Maintenance
A guide to problems, costs, maintenance and repair for your 1990 Mercedes-Benz 300E
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1990 Mercedes-Benz 300E ProblemsRough 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.
One or more blend door vacuum actuators may fail resulting in the incorrect output temperature from the HVAC system. Failed actuators will require replacement to restore proper HVAC operation.
1990 Mercedes-Benz 300E QuestionsLow beams not working? (1 answer)
Starts with some delay initially and has stalled on highway when traffic ls moving slowly or at a stop and go condition