2007 Mercedes-Benz SLK280 Q&A
2007 Mercedes-Benz SLK280 Question: I started the engine and a big puff of blue smoke appeared. It only happened once.
what would cause a big puff of blue smoke when starting the engine after sitting over night, it only happened once.!! - Visitor
Usually this is a sign of the failed valve stem seals. Some oil sweeps through the seals and burns in the combustion chamber at the next start. Zee - ZeeTech