Mercedes-Benz was also dominant in sports car racing during the 1950s. The Mercedes-Benz 300 SLR was derived from the W196 Formula One car for use in the 1955 World Sportscar Championship season. At Le Mans that year, a disaster occurred in which a Mercedes-Benz 300 SLR collided with another car, killing more than eighty spectators. The team went on to win the two remaining races of the season, and won the Manufacturer's championship, but it had already been planned at the beginning of that year that the company would retire its teams at the end of the 1955 season. In fact in the aftermath of the Le Mans disaster, it would be several decades until Mercedes-Benz returned to front line motorsport.