Cars and TransportationAn early Opel hit: the Kadett 08:10This browser does not support the video element.Cars and Transportation12/27/2017December 27, 2017In 1935, Opel became the first German carmaker to produce over 100,000 units a year. It also launched the first German production car with a unitized body: the Olympia. A slightly downsized version became the Kadett.Copy linkAdvertisement