Thanks to the unrelenting popularity of crossovers, practical wagons are becoming practically extent in America. But if you're getting tired of driving a Subaru Outback, which is one of the few mainstream wagons sold in America right now, there could soon be an alternative.

Spy shots have emerged showing Audi testing a prototype of the new A6 Allroad at the Nurburgring. An unusual choice of location perhaps, since this isn't the car's natural habitat. Essentially a jacked-up version of the A6 Avant sold in Europe, the prototype looks practically production-ready as only model-specific components such as the fenders, side sills and bumpers are covered in camouflage. A new front grille with six vertical strips will also make it look more rugged than other A6 models.