Hi, Merry Xmas!
That is an Hehner from 1948.
Hans Hehner was a man with talent and technical skill. He built the frame from steel tubes, made the metal body, and the drive chain except the engine. The air-cooled engine was placed behind the seats. The four wheels had individual suspension.
It was fitted with a chain-driven 1-wheel drive system, through which the 20hp 500cc DKW 1940 motorcycle engine gave the car a top speed of 80 km/h.