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Help! 800 rpm stationary "misfire" smoke exhaust

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Old 08-16-2022, 11:26 AM
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W205 C63S T
Help! 800 rpm stationary "misfire" smoke exhaust

Guys i have a problem.

I have a slighty judder when stationary around 800 rpm @ where the car idles,
its not always present, but when it does , on the passengerside of the car i get fumes out of the exhaust.

I have changed the plugs last week and everything was perfect for about a week, then the same slight problems started again, plus in comfort mode after standing stationary for a while or after cold start i have minor misfires downlow in the revrange ( not enough to throw a cel )

The plugs that were removed were perfect on the driversside , on the passenger problemside they were black.

Does anyone have an idea? could it be a "bad" coil pack?

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