The Swiss Felix Vogg, who was already leading after the cross-country ride, won the international five-star eventing test in Luhmühlen, Lower Saxony.
In the saddle of Colero, the 32-year-old prevailed with a faultless ride in the jumping course ahead of Kirsty Chabert from Great Britain with Classic and Jonelle Price from New Zealand with Dianimo.
Sophie Leube, the only German participant, had already given up with Jadore Moi after six of 30 obstacles in the cross-country test on Saturday.