[Booty]

You know what I think. It's not off a car at all it is part of a fridge / freezer unit on either a fridge trailer or a fridge container. They are all digital now but used to be anologue and used to be coupled up to a large wax disc ( bit like a tachograph) to show the temperature trend, and most normal fridge trailers run at a range of -20 to -25. I reckon he's trying his luck t.b.h.