The Abt Audi driver, who recently announced that he will switch to BMW for an undisclosed racing programme next year as well as joining McLaren in Formula E, had two incident-blighted races at the Eifel circuit that saw him lose crucial ground in the title race.
He scored only two points for finishing ninth in race one after multiple contacts, including being spun by Laurens Vanthoor, and retired from race two after being turfed into the gravel by David Schumacher at the final corner.
