ancker

I've noticed that when I start my 2011 C300 4Matic there is a second or so of white smoke from the exhaust. It has a very slight hint of oil smell to it. It only does it if the car has been sitting for a while and is completely cooled down. It won't do it if I go in to a store and come back out within an hour or so.

I was wondering if this is normal or not. Car has about 23k miles on it and gets mostly highway miles since I bought it. The car had the 20k service done at 18k (when I bought it). So in theory it's got everything included with that service. It may have been doing this for a while, but I only really noticed it a week or so ago.

Is there anything I should check? Any potential issues I should check into?

aznmode

I get this too on my 2010 c300. Once the car is warmed up its gone. I only notice it in the morning when I first start the car but it doesn't happen often.

Glyn M Ruck

Nothing to worry about. Just steam.