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Cyl #2 misfire. Replaced spark plugs and #2 cyl coil. Rough idle and #2 cyl misfire code P0302 still returns. Misfire noticeable at idle.

Vehicle: 2009 Merceds C300 3.0 l

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P0302 Misfire number 2 cylinder

Move the number 2 coil to a different cylinder and retest, When a MBZ has a misfire it disables the fuel injector so clearing the code is necessary. Whenever there is a misfire this a cylinder that does not contribute from a ignition problem to a fuel injector problem .

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