The Mercedes-Benz 300 SL (chassis code W 198) is a two-seat sports car which was produced by Mercedes-Benz as a gullwinged coupe (1954–1957) and roadster (1957–1963). It was based on the company's 1952 racer, the W194, with mechanical direct fuel injection which boosted power almost 50 percent in its three-liter overhead camshaft straight-six engine. Capable of reaching a top speed of up to 263 km/h (163 mph), it was a sports car racing champion and the fastest production car of its time.