For 1937 the Kadett was offered as a small and unpretentious two door "Limousine" (sedan/saloon) or, at the same list price of 2,100 Marks, as a soft top "Cabrio-Limousine". The body resembled that of the existing larger Opel Olympia and its silhouette reflected the "streamlining" tendencies of the time. The 1,074cc side-valve engine came from the 1935 Opel P4 and came with the same listed maximum power output of 23 PS (17 kW; 23 hp) at 3,400 rpm.
The transfer gearbox in the AWD models — the same as used in the Vauxhall Cavalier AWD—was somewhat on the flimsy side, liable to suffer damage from conditions such as minor differences in tyre wear or tyre pressure between front and rear axles. Since front and rear tyres would naturally wear at different rates in normal driving, it was necessary to swap front with rear tyres every 15,000 miles (24,000 km).
I join in the question: “Where did they all go?” These were pretty common in the upper midwest (as imports went) in the late 60s-mid 70s. I knew a Lutheran minister who owned one (maybe a 69 or so?) in the mid 70s, and got to ride in it once. He seemed pretty proud of the fact that he had put about 80K on it and it seemed to be running strongly. Although it was starting to look a little worn, it seemed to hold up a lot better than my Scoutmaster’s 69 Cortina.