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Mercedes-Benz
300E
11

Rough Running Engine Due to Misfire on Mercedes-Benz 300E

Problem Description and Possible Solution

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.

Problem Data
RepairPal Verified
Average mileage: 159,650 (115,600–244,000)
4 model years affected: 1990, 1991, 1992, 1993
11 people reported this problem
Comments
Viewing 1 - 4 of 4 comments
rattle and run rough. hard to take off when first start to go.making noise when you press the acceleration.
please help.
Carbon connection for the coil wire appeared o.k. but had no electrical continuity. Replacement of cap fixed problem.