Stepenson,
I am in Fairfax and recommend Autobahn Serivce Center in Rockville:
301-881-1310
www.autobahnsc.com
Ask for Ned, the owner and tell him I (Eric Silver) referred you.
You will not be disappointed.
That comment about ASC being the Nordstrom dealership is accurate. They charge you higher prices for the exact same stuff you can get for less elsewhere.
Eric Silver