Replacement of the supercharger clutch bearing in a Mercedes Benz V8 kompressor. Bearing is Nachi part number 45BG07S5AIG-2DL or 45BG07S5DL . Before the repair my engine had a bad knocking sound that was almost like the rattle of a diesel engine. This repair eliminated the noise. I did this repair without any specialty tools, and the whole procedure is about 1 hour worth of work.