By Tarek Ramchani and Johan Laubscher
The Audi brand had a very mixed season in the demanding Rolex Series GT class this year. The American "R16" won the prestigious Rolex 24 at Daytona with a terrific 1-2 result.
Audi Motorsport Blog coverage of the 2015 FIA World Endurace Championship
Audi Motorsport Blog coverage of the 2015 DTM
Audi Motorsport Blog coverage of the 2015 Blancpain GT Series
Audi Motorsport Blog coverage of the 2015 Audi Sport TT Cup
Audi Motorsport Blog coverage of the 2015 FIA World Rallycross Championship