In an exclusive interview, Volkswagen Group's executive design director Klaus Bischoff talks candidly about the VW ID electric cars . Class 2 mobility scooters can't be used on the road due to mobility scooters road rules (except where there isn't a pavement) and have a maximum speed of 4 mph. Competition from small cars with more-modern designs and the company's ... lineup and ultimately becoming Volkswagen's best-selling model worldwide.