On August 5, 1940 Waffen Prüfung In 6 gave an order to start design a new armored car called Panzerspähwagen für Kolonialwecke. The new vehicle was based on 8-Rad Sd Kfz 231/232 armored cars chassis, but powered with an air-cooled diesel engine with increased fording ability, better ventilation fot the combat/crew compartment, 30mm front armor. The vehicle had no frame and armored hull serving as the chassis base. Wa Prüf 6 selected the Büssing-NAG plant in Leipzig for chassis design, Daimler-Benz in Berlin-Marienfelde for turret project and Ringhoffer-Tatra GmbH in Koprivnice for the diesel motor. The new design was known as the Achtrad-wagen ARK and 8RT (8-Rad Tropisches).