Who makes a Quality B+ Mercedes Sprinter Coach?

I've never owned a Sprinter either converted to an RV or plain jane, but having been responsible for the money end of a companies commercial fleet of heavy trucks I would shy away from anything badged Mercedes. Theyre totally proprietary on engine parts and about 90% of the time its off to a Mercedes uber expensive place for repairs or parts. We finally dumped all of our Mercedes powered equipment for that reason. I would suspect the medium or light duty Mercedes stuff to be the same.