Motor Show début: The EVO II made its public début at the Geneva Motor Show from 8 to 18 March 1990. One year earlier, Mercedes-Benz had presented the 190 E 2.5-16 Evolution (“EVO I”), also designed as a road-legal version of the touring race cars used in the DTM events. At least 500 of a model type must be built to meet the specifications. The Mercedes-Benz 190 E 2.3-16, launched in 1984, served as the base model. Power pack: The 173 kW (235 hp) four-cylinder M 102 engine was further developed on the basis of the EVO I unit under the direction of Dr Jörg Abthoff, head of advance engine development, and his colleagues Rüdiger Herzog, Dag-Harald Hüttebräucker and Rudolf Thom. That engine had a shorter stroke (82.8 millimetres) and a larger bore (97.3 millimetres) than the engine in the 190 E 2.5-16 model series. Two metal catalytic converters were now standard equipment in the EVO II. The governed maximum engine speed was now 7,700 rpm which was made possible, amongst other things, by reduced connecting rod weight, four instead of eight crankshaft counterweights and conversion of the camshaft drive from a duplex to a simplex roller chain. Rear wing: Its striking rear spoiler made the EVO II probably one of the most eye-catching Mercedes-Benz production cars in 1990 since the 300 SL “Gullwing” (W 198) from 1954. The box-shaped spoiler was developed by aerodynamics engineer Rüdiger Faul (Mercedes-Benz Development in Sindelfingen) together with Professor Richard Läpple from Stuttgart University of Technology. To optimise the stabilising downforce on the rear axle, the spoiler had a retractable flap on the upper crossbar. The lower spoiler strip at the rear could be tilted and the front spoiler was adjustable in two stages in the longitudinal direction. Sports package: Amongst the modifications applied, the EVO II was fitted with additional body stiffeners and larger 17-inch wheels with a view to DTM racing. The aerodynamic modifications provided additional downforce compared to the EVO I: The maximum rear axle downforce of the EVO II as a result of the spoiler was up to 57.1 kilograms. On the front axle, it was up to 21.2 kilograms.