Unimog 421

The Unimog 421 is a medium-sized Unimog made by Daimler-Benz at the Mercedes-Benz Gaggenau plant from 1966 to 1989, with 18,995 units built. It was bigger than the traditional Unimog 411 and smaller than the Unimog 406, and when the 411 ended in the mid-1970s it became the predecessor of the light Unimog series. Technically it combines the ladder frame and axles of the 411 with a cab and gearbox related to the 406, and it used straight-four precombustion chamber diesel passenger car engines. Short and long wheelbase versions were made, along with front half only versions for outside manufacturers, 20 types in all. In Argentina a licence copy, the 431 series, was built from Daimler-Benz kits between 1969 and 1971.