My experience -- the best auto mechanic in Northern VA. Have taken variety of makes and models to 15 or so shops over my life...
They knew that BMWs need to reprogram the computer when a new battery is replaced. Interstate referred me to Morty's. While he was reprogramming my...
The service advisor at BMW Fairfax called me 2 hours later telling me that I needed two catalytic converters, all oxygen sensors, and a hose.