 At the third race, the C291 scored a 2nd-place finish, ahead of the C11.For the fourth round, the 1991 24 Hours of Le Mans, the team decided that the C291 would not be capable of completing the race, and thus were forced to enter three C11s.After Le Mans, Sauber Mercedes decided that the C291 had been developed enough to compete on its own, and it finished the season without running a C11 alongside.