So are they real or fake? The grille on the A6 certainly looks like it could be real, with pictures similar to this stating that the new upper and lower grille, harking back to Auto Union cars from before the war, will become standard on all future Audi's.
If you look in the Gallery you will see the other potential models- including the A6..... just take a look at the recent prototype/ design study, the Pikes Peak.....