Sébastien Buemi
Ammermüller's 2007 GP2 Series season was disrupted by injury, and he was rested in favour of Sébastien Buemi. However, Sebastian Vettel's move to the Scuderia Toro Rosso F1 team left his Formula Renault 3.5 Series seat vacant, which Ammermüller took. In 2008, he raced in the International Formula Master series.