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Smoke

3K views 1 reply 2 participants last post by  eric242340 
#1 ·
When I first start my 07 cls 550 in the morning I get a puff of white smoke but nothing through out the day when I start it again? Any ideas guys?
 
#2 ·
The most common cause of this is hardened valve stem seals. When you switch the engine off, oil can slowly leak past the seals and run down the valve stem and drip into the combustion chamber. When you start the engine the oil is burnt off and as the engine warms up the seals do their job better.

I would not worry about this too much.
 
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