In the mid-1930s, Adler-Werke built innovative aerodynamic coupés based on its advanced Adler Trumpf, which were known as racing saloons. Six of them are said to have been built, three of which took part in the 24 Hours of Le Mans in 1937. World records were also set. In August 2015, one of these unique pieces went under the hammer at RM Sotheby's in Monterey. This report tells the story of the Adler Trumpf racing saloon, explains its technical basis and shows the car in contemporary and current images.