Car Problem Reports

Mercedes-Benz SLK230 Bad Spark Plug Wires/Ignition Coils May Cause Misfires and Possible CEL

 
Mercedes-Benz SLK230 Problem
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Model Years Affected: 1998, 1999, 2000, 2001, 2002, 2003, 2004

Average Mileage: 99,500 mi (84,000 mi - 115,000 mi)

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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.

  • Visitor, , 115,000 mi

    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.

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  • Visitor, , 84,000 mi

    As described, MB dealer repairs - parts $740, labor $385 total $1,125.

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