Stohlman is certainly the worst Volkswagen dealer in the Washington, DC/Metro area. I've had multiple encounters over several visits, including both service appointments and potential sales, and every single time I've been seriously disappointed by the dealer's representatives.
I really enjoy my current VW and I do have an appreciation for the entire model line-up, but I can't recommend Stohlman to anyone for anything. Don't waste your time or energy at this dealership, you'll most certainly be disappointed in the end.
Please take note that I have raised issues directly with Stohlman's management and with Volkswagen of America, offering each ample opportunity to address my dissatisfaction, but neither made any attempt to turn my experience(s) into something more positive. I offer my review here on dealerrater.com not as an anonymous rant, but as a customer who has not received any acknowledgment from VW or Stohlman in my previous attempts.
If you have a VW and need service or if you're interested in a new car, try any dealer in the DC area except Stohlman.
VW of Alexandria, while in a shadier part of town, has much better service even though their facilities lack the shine of Stohlman's.
VW of Fairfax is pretty decent, from what I understand, but I have no first-hand experience with their staff.
Springfield VW is an average, but positive dealer, from what I've heard.
Finally, Martens (in the District) is supposed to be great, but again, I have no first-hand experience.
Good luck. Avoid Stohlman and tell your friends the same.