Ourisman VW Rockville is HORRIBLE, at least on the sales side. Lots of sneaky add-ons (like $500 for nitrogen or whatever that was in the tires) plus dealer markups they’ll deny over the phone but which are massive when you get there. So I wouldn’t go there for service, either, and then Yelp reviews for service are similarly horrific.
Depending on where you live, Ourisman VW Bethesda or Laurel have done a decent job servicing my car.