2005 c230 Rough Idle - Mercedes-Benz Forum

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post #1 of 3 (permalink) Old 10-01-2010, 12:29 AM Thread Starter
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2005 c230 Rough Idle

I have only 29k miles on this car and had bought it new. Now after 5 years the check engine light came on and the idle is rough. Checked the code - it was P0304 misfire cylinder #4. Replaced all the spark plugs, changed the coild from 4 to 3 still same problem. Anybody had the same problems and how they fixed it. Will appreciate all the help.
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post #2 of 3 (permalink) Old 10-02-2010, 12:51 PM Thread Starter
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C230 idle is not smooth like other cars because of the supercharger. Yours maybe normal.
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post #3 of 3 (permalink) Old 10-02-2010, 02:24 PM
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Vehicle: 1998 SLK230 199,xxx Miles
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