Not that I know a shop everywhere, but just so happens that Dublin struck a memory.

I'm pasting an entry from the BMW tech group I belong to of one of the top shops in the US:

Kahler’s Werkstatt, Denny & Cindy Kahler, 6117 Dougherty Rd, Dublin, CA 94568, (925) 829-2050

Denny is nationally known for his position in the German Repair industry. Try a Google search on Denny Kahler if you want to read about an allstar in my industry.

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Steve Brotherton
Continental Imports
Gainesville FL
Bosch Master, ASE Master, L1
33 years MB technician