The supercharger is considered an emission item if your car is equiped with California emissions and registered in a CARB state. It's then covered under the Cal emissions 7/70 warranty (page 26 of the warranty book) -- not to be confused with the limited powertrain warranty that SRTs don't get. Even paying out of pocket, rebuilt superchargers run around $1,300, and all MB trained techs can service these cars.