What dealer did you go to in order to your supercharger replaced? I've got the "marble" sound and I am contemplating getting the supercharger replaced or ordering a solid isolator. I called the dealer who sold me the car and they had never heard of the issue and were not aware of the special coverage, so needless to say, I won't be bringing the car back to them for service. It seems like Putnam in burlingame has an ok reputation (based on some threads here) but just wondering if anyone else has had good experiences with other dealers in the area.