The 2013 Audi RS4 Avant is at an advanced stage in testing, as seen here cruising around the Nurburgring.
Back in April, we saw the first shots of the 2013 Audi RS4 Avant beginning testing. We have just received a spy video of the Audi RS4 Avant performing some advanced testing on the Nurburgring. In the video you can see the wagon tearing up the track and dealing with a bit of weather conditions. Previous reports have indicated that the boisterous wagon features a supercharged V6 rather than a V8. Total output should be measured at over 400hp.
Unfortunately there is quite a bit of camo covering up the car, however we can tell that there are larger air intakes on the front bumper. The Audi RS4 Avant should be released in 2012 as a 2013 year model.