After a speeding violation forced the car he shared with Kevin Estre, Fred Makowiecki and Michael Christensen to start from the back of the GT3 field, Vanthoor was fighting over third place with his younger brother Dries Vanthoor's Phoenix Audi.
The pair duelled on the long Dottinger Hohe straight and continued to run side-by-side approaching the Tiergarten, with the Audi slightly ahead, where light contact between the Porsche's right front and the Audi's left rear unsettled the #1 car and sent it into a spin.