Introduction: If you hear anyone talk about a 3.8 m (12.7 ft) long and 1.15 m (3.8 ft) tall vehicle, with a starting price of over EUR 110.000 and in a 250 units limited edition, you'd probably think of a sports car. Well, in this case it is not. It is the Volkswagen XL1, the most fuel-efficient production vehicle in the world at the time of its launch, in 2013.