What did you find when you searched the codes? They have been discussed many times with all the solutions available.
Maf sensors, 02 sensors, spark plugs, however when I had a dealer inspect it they told me its a "deformed air intake pipe", been trying to get the part number but they haven't been helpful with providing it.
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.