When I first got into the Audi A6 3.0T, I thought that something had gone wrong with the MMI, because when I pressed the nav button, the system told me navigation wasn't installed. I thought this was a software glitch, as I've never seen an MMI-equipped Audi without navigation, but a little research revealed the Q7 and the A6 come with a full MMI system but no navigation. Bummer. I know I'd be upset seeing that nav button and not having the $1800 option.
I had to really listen to hear the supercharger in this car. There is virtually no whine, and the throttle response is instantaneous. The obvious comparison is to BMW's 3.0-liter twin-turbo I-6, which is much more obviously boosted since the power hits so hard when the turbos come on. The Audi is much more linear in its power delivery, which makes the A6 feel much smoother than a 535xi. Those choosing an Audi will also enjoy a savings of about $3000 over an all-wheel-drive 5-series and gain an extra mile per gallon in the city and on the highway.
Overall the A6 feels quite nice. The suspension is a bit softer and smoother than a Mercedes-Benz or a BMW, but the car can still be driven rather spiritedly on a back road. MMI is easy to use, and the stereo provides a pleasant listening experience (which is a good thing, because there's no upgrade for the stereo from the factory). Everything inside the cabin looks and feels good to the touch. Add up all those individual characteristics, plus Audi's signature Quattro all-wheel-drive system, and it's tough to think of a better luxury sedan for people who live in climates that see lots of rain or snow.
Phil Floraday, Senior Online Editor