Rudolf Caracciola driving Mercedes-Benz W25 Grand Prix car, c1934-c1935. Caracciola was the highly successful Mercedes team's top driver in the 1920s and 1930s. He won numerous races for them, and was European Champion three times, in 1935, 1937 and 1938. He also was Mercedes' driver in Land Speed Record attempts, again being highly successful. (Photo by National Motor Museum/Heritage Images/Getty Images)