STT 2015
Audi R8 LMS ultra #16 (Berthold Gruhn), Berthold Gruhn

Successful race weekend for Berthold Gruhn in the Spezial Tourenwagen Trophy (STT). Gruhn, driving his private Audi R8 LMS ultra, finished second in class in the first race at Oschersleben and won his class in the second race.