The Audi A8 underwhelmed us, but the redesigned A6 did just the opposite. Audi it the ball out of the park with its middle-child luxury sedan, applying the same high-end interior quality as the A8 to a more attractive, aggressive body and imbuing the resultant vehicle with an engaging, fun-to-drive character. Grab the 3.0-liter V6 and tack on a few select options, and the A6 becomes a low-key star in a competitive segment.