Officially, the Audi slogan is Vorsprung durch Technik, which is German for Lead by Technology. However, the translation gets a bit skewed in English, and when Audi does use this particular slogan—which isn’t all that often —they typically use Being Ahead Through Technology.
In recent times, Audi has split with this slogan in the U.S. and adopted a different slogan—but only for its hybrid and electric vehicles. The current slogan for EVs and hybrids is Future is an Attitiude, which is meant to entice buyers to be proactive rather than reactive to the green revolution.