The 540k Cabriolet was shown at the international motor show in Berlin in 1938. The car with the unusual rear wheel cover is now part of the Schlumpf collection in Malmerspach in Alsace. You can find pictures of this and many other interesting cars that were codied by Erdmann & Rossi in the book 'Nobelkarosserien aus Berlin' by the publishing house Kraftakt. You can also find this book (in German) in our shop.