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 Problems

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.

Failure of EHA valve may cause fuel/engine problems
Fuel leaks, erratic or rough engine operation, and fuel economy issues can be caused by the failure of a fuel system component called the EHA (electro-hydraulic actuator) valve.
Improper Temperature Output From HVAC

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.

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1990 Mercedes-Benz 300E Reviews

I have this Mercedes-Benz 1990 3000E all of sudden out of no were, the car was on park went to put in reverse the park car would not move! Had no signs of tranny problems at all! No leaks at all! car runs awesome until this! mileage is 168000! What could this be?
this vehicle looses spark when it warms up any ideas
power seats will not work if doors are closed but work when any door is opened------any ideas to problem thanks

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