restarting the engine with a few seconds to go before the light in front of you changes to green. Pretty slick. Audi set up a trial of the system in a A6 sedan around the Las Vegas Strip ...

The Audi A6 e-tron is a new electric luxury sedan that ... that isn't just ambient lighting—it also changes color to flash green with the turn signals, for instance. A glass roof is standard ...

Numbers will once again refer only to a model's size and positioning in the lineup, Audi said in a press release. The letters ...