Round-9-Road America, Wisconsin, USA
7-9 August, 2015, Elkhart Lake, Wisconsin, USA
, 25, BMW, Z4 GTE, GTLM, Bill Auberlen, Dirk Werner, 007, Aston Martin, V12 Vantage, GTD, Kuno Wittmer, Christina Nielsen
? 2015, Michael L. Levitt
LAT Photo USA