This Sd.Kfz. 11 is a light artillery tractor, or prime mover, with a towing capacity it 3 ton. It was based on the standard Sd.Kfz. 11 chassis developed by Borgward, this version is made by Auto-Union in 1944. The name Einheitzfahrerhaus means it had a standard drivers cabine, both the cabin and the open flatbed were made from wood.
More information on the Sd.Kfz. 11 Halftrack in this link.
