Like other German luxury automakers, Audi markets a range of sedans in varying sizes. The latest A6 sedan splits the difference between the smaller A4 and larger A8 sedans. While the A6 is competitive in size with the BMW 5-Series and Mercedes-Benz E-Class, it offers slightly less interior room than mainstream mid-sized sedans like the Toyota Camry or Honda Accord. For a luxury sedan, the A6 represents a healthy blend of size, luxury, and performance. Like most Audi models, the A6 is offered in Premium, Premium Plus, and Prestige trim levels. The base Premium model is well equipped, with the higher trim levels adding features like HID headlamps, four-zone climate control, and larger wheels/tires.

The A6 gains a diesel model.