The series features professional racing teams and drivers and is heavily supported by car manufacturers Audi and Mercedes-Benz.
Mike Rockenfeller moved into the factory Team Abt Sportsline outfit, driving a latest-specification car for the first time.
With Paul di Resta leaving the HWA Team for Force India in Formula One, Jamie Green took over his spot in a latest-specification Mercedes.
Reigning champion Paul di Resta did not defend his title with the HWA Team, having moved into a Formula One drive with Force India.
[11] A twelve-race provisional calendar was announced on 29 September, including the non-championship event in Munich, and a return to the newly renamed Red Bull Ring, replacing Adria.