Bad Spark Plug Wires/Ignition Coils May Cause Misfires and Possible CEL on Mercedes-Benz SLK320

Submitted by Vehicle Owner · May 29, 2025

Published by RepairPal

Problem overview

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.

7 people reported this problem

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Mercedes-Benz SLK320 vehicles with this problem

2 model years affected

2002 Mercedes-Benz SLK320

2001 Mercedes-Benz SLK320

2002 Mercedes-Benz SLK320

2001 Mercedes-Benz SLK320

Average mileage: 113,000 miles

(113,000 - 113,000)

Repairs related to this problem

Ignition Coil Replacement

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