If you by parts directly from Chysler or Mercedes, or even a high-end tuner like kleeman, you going to pay through the #@%. I bet within the next six months you'll find a supercharger kit for this car for under $5,000. You just don't by from expensive German tuners or from the factory.
Yeah, and see how long that lasts. I wouldn't put any American or Japanese parts on this car. German parts cost more because you get what you pay for.