Problem with a miss on #6 cyl. . on 2004 Mercedes-Benz S600

Replaced the coil pack with same result. Spark plugs on #6 showed some oil. One plug was carbon fouled. Any suggestions what to check for the oil.

by in Newburgh, IN on October 14, 2012
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1 answer
ANSWER by , October 14, 2012
start with a wet and dry compression test. it will verify rings. if that is ok, it could be valve seals or bad guides Roy