Audi 100 three-speed automatic transmission sourced from Volkswagen. The Audi 100 included a rough engine note that was described as unlikely to discourage buyers whose first car had been a Volkswagen and who aspired to drive a diesel powered (pre-turbo) Mercedes-Benz. The Ingolstadt production line was at full capacity, but supply fell short of demand that during the summer of 1970 an additional production line for Audi 100s was set up in Volkswagen's own Wolfsburg plant, which made it the first water-cooled car to be produced in Germany's (and by some criteria the world's) largest car plant. For the Swiss market, the
Audi R18 and 5th among WEC LMP1 competitors (310); the car was less reliable than the other two, marred by a gearbox issue midway in the race. Both the Ultra and e-tron Quattro made their racing débuts at the 2012 6 Hours of Spa-Francorchamps as part of a four-car Audi entry in the FIA World Endurance Championship. The #3 car of Romain Dumas, Loïc Duval and Marc Gené gave the Ultra victory over the e-tron Quattro. Audi finished 1-2-3-4 in the race. Audi had entered a four car line-up for Le Mans. The e-tron Quattro finished first and second with the Ultra