The car is an Adler Diplomat Sport-Limousine. This one-off was the personal car of Erwin Kleyer, the son of Adler's founder Heinrich Kleyer. The body design was supposedly done by von Koenig-Fachsenfeld and Jaray. The car was shown at the opening of a new Autobahn part, so the photographer called it Autobahn-Wagen, but that was no official name.