An advertising slogan at the heart of pop culture, Audi's Vorsprung durch Technik has not only entered everyday speech, but has also made its way into song lyrics such as "Parklife" by Blur and U2's "Zooropa". Yet Vorsprung durch Technik is far more than a slogan for Audi - it represents a conscious choice to always think in new ways. This forward-looking approach has led to Audi's pioneering innovations such as the permanent all-wheel drive, aluminum construction and the TDI engine. Since 1909, and all throughout its eventful history, the company with the four interlocking rings as its symbol, has consistently produced cars that excite drivers: the Auto Union Grand Prix racing cars, the legendary quattro, the TT.