Heinz Gietz Autohaus, Inc. - Mercedes-Benz of La Jolla is proud to be a family owned and operated Service Only Dealer servicing the San Diego area for over 40 years. Heinz Gietz Autohaus specializes in new, certified pre-owned, and extended limited warranty repairs, and is a factory service and maintenance provider. Our Dealership also offers an inventory selection of pre-owned vehicles and a full service Parts and Accessories Department.