Is there a GOOD MB Tech in NH/Northern MA?

[nhdoc]

I live in Nashua, NH and am looking for a good independant shop within an hour of me. That covers Boston to Portsmouth. Does anyone know of a good shop with lots of experience with MB cars? I don't like my dealer. They are slow (one time they had our car for a whole week) and last time my '02 C320S was in the shop for its "B" service they broke the windshield while they were changing the blades. While that one is under warranty I don't have much choice but would like a shop for my '88 560SL if there is a job I don't want to tackle myself.

Thanks in advance for any recommendations.