Project Update:

Today I jacked the car and removed the stock caliper. the CL500 Brembo Caliper bolted right on! They even clear the stock dust shield just fine although I suspect I will have to ditch them when I get new rotors since the new rotors are thicker. I then popped in the pads and verified that these rotors are in fact designed to work with 330mm rotors (SRT-6/SLK32). Next I mounted my wheel up and verified that the wheel clears the calipers. they do clear but it is much closer than stock. See pictures. Now I need to find some SRT rotors. the OEM rotors are very resonable but I am also looking at drilled and/or slotted.

P.S. Someone really should by the C32 brakes that Splinter provided a link to.