An estate wagon belonged to a middle-class family before the nuclear apocalypse. Well-maintained and serviced, the car had seen plenty of vacation memories with the owner and his family. One unforgettable vacation in the woods would mark its final trip for the bunch but not the car.
Many years later, the car was discovered and towed by a group of nomadic survivors. Without any tool or knowledge, the group had no idea how to operate nor repair the wagon. This later changed when a psychopath who stalks the woods somehow acquired the machine from the group by force, who has the material to jumpstart the car. Even better, he changed the car into his own custom death machine by merging with the scrapped battle tank he found. He rebuilt the engine and added a supercharger to the 4.2l V8 engine. One of his ultraviolent trademarks was adding the custom thresher at the front for mowing.
Towards his quest for terror, he now wanders the wasteland and destroys everything in his path inside the modified Audi, whether they're survivors or raiders.