Hi Tobias! Thanks for all the considerations and the tips.
Yes, I have a diesel heater so the inside temperature should not be a problem. And good to know about the fluids, I can investigate that some more.
In terms of tyres: I will spend most of the time travelling on main roads, but would love to have the option to travel on secondary/smaller roads, so snow chains will be a great add-on.
But for the main roads: if I wanted to borrow or rent winter tyres from you guys, how would that work? 🙂 I’d love to find out more!