Mercedes-Benz 300E Repair and Maintenance
A guide to problems, costs, maintenance and repair for your Mercedes-Benz 300E
Verified by mechanics, reported by drivers like you
Ask a mechanic in our community
Never overpay. Check prices with our estimator
Mercedes-Benz 300E ProblemsFailure of EHA valve may cause fuel/engine problems
Due to wear, high usage vehicles can experience ignition lock and tumbler failures. The ignition lock cylinder will generally require replacement to correct this concern.
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.
Mercedes-Benz 300E QuestionsLow beams not working? (1 answer)
cruise control wont maintain speed
Starts with some delay initially and has stalled on highway when traffic ls moving slowly or at a stop and go condition