King Volkswagen Gaithersburg 979 Frederick Ave. Gaithersburg, MD 20879. King Volkswagen's Finance Rate Specials. 0% APR for up to 72 months on select models.  For more Finance Rate Specials call 301-948-3330. Remember... Volkswagens always cost less in Gaithersburg. Maryland's #1 VW Dealer... Year after year.