Mercedes-Benz Museum: The Road Cars Published on November 27, 2017 in Galleries by Michel Deslauriers Photo: Michel Deslauriers 1955 Mercedes-Benz 300 SL Coupé. Also known as the Gullwing. Only 1400 units were produced. Engine: six cylinder Displacement: 2996 cc Output: 215 hp (158 kW) Top speed: 250 km/h