At the end of 1990, along with his Formula 3 rivals Heinz-Harald Frentzen and Karl Wendlinger, he joined the Mercedes junior racing programme in the World Sports-Prototype Championship.
A finais de 1990, xunto cos seus rivais na Fórmula 3 Heinz-Harald Frentzen e Karl Wendlinger, incorporouse ao programa de carreiras para mozos de Mercedes no World Sports-Prototype Championship.