Euro Auto Care in Davidsonville, Maryland. I got nowhere with the electronic gremlins in my 2004 coupe, the Chrysler and MB shops in my area did not have a clew...until I found Lou at Euro Auto Car.
Also worth mentioning was a shop in DC called Benz Magic. They had my car for several weeks and tried to resolve the issues..They could not figure it out. When I went to pick the car up I could`nt find it..I asked where the *&^%&^ is my car, and they said "its being detailed"...It still had issues, but Damn, it looked great !..When I asked the owner what i owed them he said.."absolutely nothing, we tried but did`nt fix it"... Never had that happen at any shop !