The WF trac is the current version of a tractor originally known as MB trac and developed by Mercedes-Benz which was based on their Unimog platform. It was built by Mercedes-Benz between the years 1973 and 1991. At its time its design and concept was revolutionary, featuring four identical wheels, high road speeds and powerful engines.
Some offshoots have been manufactured since Mercedes-Benz left the agricultural business - several companies incorporated the technology in their own products. Production and development of the whole product continues as WF Trac at Werner Forst- und Industrietechnik (Werner foresting and industrial technology) in Trier, Germany.
Read more about MB Trac: History