2007 Sabbatical

2006 DTM
Audi

2005 DTM
Opel

2004 DTM
Opel (OPC Team Holzer)

2003 Formula 1
Team Sauber-Petronas, 11th

2002 Formula 1
Team OrangeArrows
Team Sauber-Petronas (GP USA), 18th

2000 Formula 1
Team Jordan Mugen-Honda, 9th

2001 Formula 1
Team Jordan Honda
Team Prost Acer, 12th

1999 Formula 1
Team Jordan Mugen-Honda, 3rd  (2 victories)

1998 Formula 1
Team Winfield Williams, 7th

1997 Formula 1
Team Rothmans Williams-Renault, 2nd (1 victory)

1996 Formula 1
Team Red Bull Sauber-Ford, 12th

1995 Formula 1
Team Red Bull Sauber-Ford, 9th

1994 Formula 1
Team Sauber-Mercedes, 13th

1993 Japanese Formula 3000 Championship
Team Nova Engineering, 9th
Formula 1 test driver for Mugen and Bridgestone

1992 Japanese Formula 3000 Championship
Team Nova Engineerig, 14th
Japanische Sports Portotype Championship
Team Nova Engineering, 19th
World Sports Car Championship
Team Euro Racing, 13th

1991 International Formel 3000-Championship
Team Vortex, 14th

1990 International Formel 3000-Championship
Team Eddie Jordan Racing, 16th
World Sports Car Championship
Sauber-Mercedes-Junior-Team

1989 German Formula 3 Championship
Team Schübel, 2nd

1988 Formula Opel Lotus
Team Mass, German Champion
Team Mass, Euroseries, 6th

1987 Formula Ford 2000
Eifelland Racing-Albert Hamper, 2. Platz

1986 Formula Ford 2000
Eifelland Racing-Albert Hamper