It's running firmware 2.x. And yes, it sleeps outside with the car (I live in a very quiet rural area) I've (luckily) never seen the "No Hard Disk Found Contact Support" warning though...

I'll take it in with me for a couple of days, see what that gives. It started freezing pretty hard here in the last two days (-7 °C, which is exceptionally cold for the area where I live)