Very clever design, this.
In my view, it's the crossover car to the next Audi look. They are hell bent on getting a stronger brand grill, and the next A6 will have it, but this is the strongest hint of it without actually cutting away that bumper. The angle of the headlights will feature more strongly on the A6, too.
Also, the rear lights are a midway point between the squareness of the current style A4/A6 and the sleeker look to come.
It's just a shame it's got such a fat ****!