2010 cls 350cdi w219 missfire

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IFFY100

Active Member
Joined
Jun 8, 2020
Messages
313
Location
SCOTLAND
Car
Cls 350 cdi 2010 grand edition
Noticed a slight issue lately - the car seems to missfire at idle. Particularly noticeable when cold. Actually the engine sounds geunty too when cold as if something is blowing. I think the issue is an vacuum leak somewhere. Can someone please direct as to which pipes are most likely the problem? Recently I did get a code p0299.
 

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