Mercedes-Benz chose the Euro VI-compliant, four-cylinder, OM934 5.1-litre engine with 170kW and 900 Nm as the new powerplant for both Unimogs. The trigger for the engine change was Euro VI emissions levels that dictated cooled exhaust gas recirculation (EGR), a diesel particulate filter (DPF) and selective catalytic reduction (SCR). Inside that familiar envelope is a revised powertrain. Gross mass ratings for the U4023 are 7.5-10.3 tonnes, depending on vocation and for the U5023, 12.5-14.5 tonnes.īecause post-2014 Unimog models have Euro VI emissions compliance that isn’t necessary in Australia there was no legal reason to hurry the introduction of these vehicles Down Under: hence their delayed arrival here.Ĭarried over from the previous generation are the design of the familiar cab sheet metal, flexible chassis, high-ground-clearance portal-hub axles, all-coil-spring suspension, eight-speed main transmission and low-range gearing, but virtually everything has been upgraded and strengthened.

The latest Unimog range was released in Europe in 2014 and retains the previous model numbers of U4023 and U5023. The latest Unimog looks familiar, but hides significant powertrain changes behind that rugged façade.