I am really hoping someone can solve this one.
Looking at a lot of photos on the Internet, I have not found this one and not using Google SBI, I still think that the photo of this vehicle is not available on the Internet.
Looking at many, many photos of postwar German cars and trucks that may have been based on a Jeep chassis. I come up with nothing.
On the other hand, the closest I can come to looking at the puzzle photo, is it looks similar to the typical Buessing Nag profile.
Sadly, BN seems to not have produced a vehicle of this small size.
I can only hope that one of our German members or someone who has a better knowledge of German vehicles can ID this one.