Rather than a brochure, I think that this was the Geneva Auto Show reveal article in the magazine that D-B sent to all Mercedes owners back in the day. One white car was parked outside on the terrace, while another white car was the press reveal car inside the Restaurant du Parc des Eaux-Vives the morning prior to the opening of show. One or both of them may have subsequently been was pressed into service as press demonstration cars, getting a good workout on road and track during the show. One can also see the a silver one in the background in one of the exterior shots. Someone correct me if I am wrong, but I think the red one on the show hall floor was the Pagoda that shortly afterwards went back to the factory and was massaged into the rally car that Eugen Böhringer took on his epic run in the Spa-Sofia-Liège rally just a few months later. In any case just about every one of these very, very early cars differ from what we now accept as standard production units while the factory made spec modifications and adjustments to the production process. While they bear the earliest production serial numbers, they are essentially pre-production prototypes.
