Been enjoying the 07' 550 I purchased just before Christmas upon returning from vacation I see a fairly sizable pool of oil under the rear of the engine of course all sorts of crazy things are running thru my head starting with what the hell did I get myself into! Dropped her off this morning at MB was anxiously awaiting the bad news my service rep calls and tells me its The camshaft end caps which by mercedes benz standards was pretty cheap to fix!