I'm recommended shop in down town of Leesburg, VA on Harrison st. It's called European Service Center.
I know those guys for more then 8 years, and they are been serviced all my cars, I have seen there Ferrari's, Lamborghini, BMW , Benz, Audi, Alfa, and other exotic and not exotic cars. I'm not working for them or shared any profit, just trying to help in current economy to bring more customers.
They even do this famous BMW: