If you are wise, and pay any attention to this forum, you should never even consider a Camping World for any important service. Find an auto or truck mechanic that knows and works on the Sprinter and go there. If they can service the engine on a Sprinter van, the RV is the same thing. I use a local mechanic shop for my Class A with a Ford Triton engine. He does not do any work on the coach itself, but any good Ford dealer or truck mechanic can service the engine, brakes, and such. Mecerdes mechanics are not quite so available, but any good mechanic qualified for diesel engines should be able to handle routine maintenance.