Check Engine Light and Engine Misfire on Mercedes-Benz E420

Problem Description and Possible Solution

Failed spark plug wires and/or ignition coils can cause intermittent misfires (rough running); the Check Engine Light may also illuminate. Diagnoses of the ignition system will be necessary to determine which components are at fault.

Problem Data
RepairPal Verified
Average mileage: 127,750 (98,000–157,500)
1 model year affected: 1997
4 people reported this problem