Engine cooling was one of the main problems facing the early automobiles. This Benz racing car still had an open cooling system. The cooling water is cooled by the airflow in pipes fitted with cooling plates and partially vaporized in the condenser behind the seat. Although not particularly efficient, it was sufficient for the output developed by the 14-hp (10 kW) two-cylinder horizontally-opposed piston engine.

• Cylinders 2
• Displacement 166 cu in
• Output 14 hp (10 kW)
• at engine speed 1000/min
• Top speed 40 mph