Found most of my answers over on mbworld. Heres a list of the mods. Even has cams and a custom intake. Still don't know what pulley or exhaust mods. This would have to be MB's best shot to get into the 11's.

The list is pretty long...

ECU, pulley, cams, upgraded intercooler with remote reservoir (two pumps), intake, headers, custom exhaust, LSD, brakes, wheels, springs, shocks, cosmetic stuff (grill, antenna, roll bars, wood trim), oil catch can. I think that is pretty much it