[Rules] Commandeering an enemy truck?

[Schoenwulf]

Is there anything in the rules related to using an enemy truck that has been left by its units? e.g. German infantry disembark and are defeated in battle, leaving this perfectly unused and well-fueled vehicle behind. Why wouldn't Soviet troops hop on board and move down the road with it? Or is that something that is occasionally house-ruled or in the special rules?