I didn't like the large uniframe grille a decade ago, but Audi's designers have made it work. From this angle the A6 appears dramatic. Note how the character lines converge on the body side.
Compared to competitors, the A6 has a rounder shape and more massive nose. The much more angular Cadillac occupies the other extreme.
For me, the weakest area of the A6's exterior is around the rear pillars. Very plain, appears weak. Extremely clean body sides. For more drama, spend another $8,000 for the related A7 hatchback.
Tasteful styling continues inside the A6. Many other manufacturers copy this look. More flash inside the less roomy Cadillac. Some people find the look a bit much. (2014 in the pic.)
More than that of competitors, Audi's interior design enhances real and perceived roominess. This is what passes for above average usability in a current luxury sedan.
Among the tweaks for 2016, the nav map can be displayed in the main instrument cluster. Audi's seats provide proper support, but don't feel especially comfortable or luxurious.
Plenty of room in the rear seat, but the cushion is a little low to the floor (a common issue). It's a trunk. Sadly, the A6 wagon hasn't been offered here since 2011.
The usual cover obscures how little space the four-cylinder engine takes up under the A6's big hood The 2.0-liter turbocharged engine gained 32 horsepower for 2016. Plenty strong, if a bit laggy.