Mercedes-Benz Museum: The Road Cars Published on November 27, 2017 in Galleries by Michel Deslauriers Photo: Michel Deslauriers 1979 Mercedes-Benz O 303 Touring Coach. The 1981 edition of the O 303 became the first bus equipped with anti-lock brakes. Engine: V eight cylinder Displacement: 12,763 cc Output: 256 hp (188 kW) Top speed: 123 km/h