With these guidelines in mind, the Opel question was put again on 3 May to the GM financial policy committee, which then withdrew its objections to a return to Rüsselsheim. Many details still had to be worked out, both within GM and in the US-occupied zone of Germany, before this could actually occur. At last, the official word was released on 1 November 1948; GM resumed management control of Adam Opel AG. Edward W. Zdunek, formerly regional manager for Europe of General Motors Overseas Operations Division, was named managing director.
Opel also produced the first mass-production vehicle in Germany with a self-supporting ("unibody") all-steel body, closely following the 1934 Citroën Traction Avant. This was one of the most important innovations in automotive history. They called the car, launched in 1935, the Olympia. With its small weight and aerodynamics came an improvement in both performance and fuel consumption. Opel received a patent on this technology.
The Kadett A (above) finally appeared in 1962, and was a classic GM/Opel effort: highly pragmatic, conventional in every respect, reasonably stylish for its time, and designed to deliver a good bang for the buck. In just about every way possible, it was the antithesis of the VW: front-engine rwd, a rather tinny but roomy body, highly tossable but with a primitive suspension and ride, a very roomy trunk, and excellent visibility as well as economy. Oh, and a proper heater even! Its little 987 cc OHV four made 40 net/46 gross hp, six more than the VW 1200. Its trim fighting weight of 1475 lbs (670 kg), some two hundred pounds less than the VW, showed in both its acceleration and body integrity.