One for the track fans...
Its basically a supercharged CLK with 480hp. Upgrade also available for C55 and SLK55... This one can powerslide too...

http://motorvision.sport1.de/coremedia/generator/www.motorvision.de/Rubriken/Videos/Tuning/Videos/Testbericht/tun3_20Carlsson_20CLK_20RS.html