Part 1 of 5: Looking back on the five overall victories for Audi in the 24-hour endurance classic at the Nürburgring Nordschleife. The journey begins with the first overall victory for the brand with the four rings in 2012. Audi Sport driver Frank Stippler recalls the race when he and his teammates, Marc Basseng, Christopher Haase and Markus Winkelhock, won the race for Audi Sport Team Phoenix.