I have a 2002 c230. When it is cold and I first start the car is has a miss fire p0302. I let it run for a minute and turn the car off. I start it back up right away and the car runs perfect. I can hardly tell that the car is on. Can anyone explain this before I take it to the shop and spend a ton of money. I put in new plugs. I changed the coil packs to a different cylinder and am still getting cylinder 2 miss fire. With the miss fire I keep getting the check engine light.

Thanks,
Greg

 

Miss is present at end of minute #1? Miss severity does not change from start to end of minute 1?

 

no it runs really rough for a minute or so. I turn the car off. I start it right back up and it runs really smooth. I can hardly tell the cars on.

Thanks for any help/advice you can give,

Greg

 

The miss severity does not change