Audi's piloted driving system enters uncharted territory.
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Much as BMW has its M division and Mercedes-Benz can turn to AMG when they want to make fast cars, Audi relies on its own in-house tuner, Quattro GmbH.
Maintaining a healthy vehicle inventory size has been an issue for Audi's booming U.S.
We've been following the development of autonomous driving vehicles closely, and usually that involves the Google self-driving car.