The Opel Blitz contains a well detailed engine, but no means to show it, unless you do some surgery to the hood/bonnet. The radiator grill is nicely done (with a see-through effect), but the Opel Blitz logo is missing. The headlights have separate lenses.
The chassis of the truck is of the 4x2 type and the body is a bowser, but not a regular one. It is the type used for rocket fuel, which means you can only use it together with a V-2 missile, Me163, Natter, one of the experimental Me262s with combined jet/rocket engines, etc.