The midsize 2009 Audi A6 is the ideal vehicle for the socially mobile family in need of generous interior space and all-wheel-drive capability, but not at all interested in an SUV. Offered in both sedan and wagon (known as the Avant) forms, the A6 combines traditional Audi styling, luxury and performance with the sure-footedness of quattro all-wheel drive. Larger than the A4, but not as bulky (or expensive) as the A8, the A6 offers a range of models and features with broad appeal to the premium midsize luxury sedan buyer.