This version of Audi's flagship sedan scored very high in our luxury-car lineup. Its powerful engine provides effortless thrust, yet attains commendable fuel economy -- even with the standard AWD. It also handles crisply, corners eagerly and holds the road tenaciously. The sumptuous and tasteful cabin has nearly every comfort feature known. Further, a long list of high-tech safety features puts this car on the leading edge of safety engineering. However, the controls are abundant and complicated. A long-wheelbase version is also available.