Finally had time to dig into the new/old c-class. Had lean codes, adaptations lean at cruise and idle. Smoked the intake and of course it's leaking at the PCV hoses behind the blower. Parts have been sitting on my toolbox for a week but was able to tear into it after work today. The check valve just crumbled into pieces as soon as the supercharger came off.
Slideshow: A one-of-one U.S.-spec Mercedes-Benz SLR McLaren Roadster became even rarer after a factory-backed transformation at McLaren's headquarters.