The Audi A6 quattro is a four-wheel-drive executive car produced by German automaker Audi. The A6 quattro has been in production since 1995 and is currently in its fourth generation. The A6 quattro offers a powerful combination of performance, luxury, and practicality in a mid-sized package. It comes with a choice of diesel, gasoline, and hybrid powertrains, as well as a number of advanced safety and driver-assistance systems.