However, these impressive victories became overshadowed at Le Mans when the once again leading 300 SLRs were withdrawn after a horrific accident involving a team car driven by Pierre Levegh. Even with the innovative wind-brake, the car's drum brakes had been unable to prevent Levegh from rear-ending an Austin-Healey, causing his car to become airborne. Upon impact, the ultra-lightweight Elektron bodywork's high magnesium content caused it to ignite and burn in the ensuing fuel fire. Compounding it, an uninformed race fire crew initially tried to extinguish it with water, only making it burn hotter. Eighty-four spectators and Levegh lost their lives in what remains the highest-fatality accident in the history of motorsport. Mercedes withdrew from racing at the end of the 1955 season, and would remain withdrawn for three decades.