The development engineer who, after the war had ended, quickly became involved in sports vehicles again, was hired by Colonel Michael McEvoy from the Royal Electrical and Mechanical Engineers, a division of the British army. He was to build a small racing car for the officer who he knew from pre-war days. Uhlenhaut planned a frame made of closed tubular triangles, the individual segments of which were only stressed through pressure or tensioning. The construction was new and guaranteed a light weight but at the same time sturdiness as well as a high degree of bending and torsional strength. Uhlenhaut adopted the idea of the space frame for a new racing car from the representative Mercedes-Benz 300 Saloon (W 186, "Adenauer Mercedes"): the legendary 300 SL (W 194) was born, albeit initially only as a racing car.