I have been trying to add my new C320 coupe to my policy and they're telling me that it's a grey import (vehicle not made to be sold in US) when it obviously isn't. It has all of the federal info. on the door sill, DOT stamps on the windows and proper Mercedes VIN pattern for US models. AIG (my insurance company) won't add it until they have a release letter from the DOT. They say they require this of all imports. My dealer can't figure it out either. This is really getting irritating since I now have a new Mercedes I can't drive. Does anyone have any advice or similar experiences??