Was Diess offered a position at Tesla?

The German publication Business Insider claims that before Herbert Diess moved from BMW to Volkswagen in summer 2015, Elon Musk is said to have offered him the CEO job at Tesla.

According to Business Insider research, Diess was given an employment contract ready to sign, but the Volkswagen Group CEO rejected Musk’s offer.

businessinsider.de (in German)