 Sauber participated in a number of other racing series before its involvement in Formula One, including the Swiss Sportscar Championship and the World Sportscar Championship.The first Sauber car, C1, was built in 1970.Sauber, in partnership with Mercedes, won the Le Mans 24-hour race in 1989 and the World Sports Prototype Championship in 1989 and 1990 with the Sauber C9 and Mercedes-Benz C11 respectively.