I neither knew that the DKW Munga was sold in the US, or that it was called the Bronco here. Undoubtedly, sales were very modest, at best. But the Munga was a very successful military vehicle in Germany and other NATO countries, with almost 50,000 being built between 1956 and 1968. It was chosen over the Porsche 597, which was something of an update on the VW Kubelwagen. Unlike Porsche, Auto-Union had the production facilities to build the Munga in quantities and lower cost.
The Munga was eventually replaced by the VW Iltis, which was essentially an evolution of the Munga.