C230K cold start
 

Since I bought my C230K sedan W202, every morning upon starting it would fire up perfectly but then chug and give about 4-6 good "shakes" of the engine then smoothen out perfectly. It only does this if it sits for a good 8 hours or more otherwise its always smooth.

I will check the book again but records show the dealer has done the spark plugs a year ago and I only have 80 000kms aswell they did all the service A's and B's up to date.

What could this be then....is this a major thing?