Kraft Motors (E55th St & Ave J):
Good independent shop, Only work on MB's. Alittle expensive, but excellent work, great service, and knowledgable repair men. I would only suggest bringing car here if you have some major problem. One bad point--you have to drop off the car early in the morning at around 7am, and pick up at a later time.
Sovereign Motors (Flatbush Avenue)
MB dealership, I dont have much experience with them--had an oil change done once. Good stock of parts, and friendly parts department. Service department is ok. Lots of good looking secretaries in there