Mercedes-Benz
SLK230
9

Check Engine Light and Engine Misfire on Mercedes-Benz SLK230

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: 99,500 (84,000–115,000)
7 model years affected: 1998, 1999, 2000, 2001, more2002, 2003, 2004
9 people reported this problem
Comments
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The engine started to misfire at times. After a cool-down it would again operate OK. The check engine light would illuminate. Checked with an OBII tester and it indicated a misfie on #3 cylinder. Pulled the coils from #2 & #3 cylinders. Checked them with an ohmmeter. #2 had radically different reading than #2. Got a new coil for #3 cylinder. Everything now seems OK.
As described, MB dealer repairs - parts $740, labor $385 total $1,125.