Unimog, model series 406 with traction measuring trailer during testing. Tractor unit Unimog 70 hp in front of a traction measuring trailer on the test track. The traction measuring trailer has a total weight of 16 t, can measure hitch hook forces between zero and ten tonnes and can record six items of status data. The braking power is dissipated via air-cooled resistances and a 24-way selectable gear ratio.
The measuring speed ranges from 0.4 - 80 km/h. The selectable gear ratio.is used for recording traction graphs as well as for endurance testing of the tractor unit engine on the road.