Had diesel fumes permeating from the engine compartment and seeping into the cabin. brought it to the dealer and they discovered and replaced a leaking diesel exhaust cooler. Problem fixed.
2011 X5D Loaded (Oil Burner)
2012 VW Passat SEL TDI (Oil sipper)
2008 Honda CBR 1000
2007 Harley Davidson Sportster XL 1200
2010 Mercedes GL350 (in the shop too much)
2008 Audi A6 3.2 Quattro loaded
2005 BMW M3 Black compertition Pkg with Nav