Prob not the smartest idea in the world, but I'm not the smartest person.

So I'm driving in next couple days to St Moritz for a quick stay before returning to Zurich.

I had booked a random car but on advise from other people upgraded the car to some AWD model.

But then someone mentioned that you might need snow chains....I thought the roads would be clear enough (presuming car rental has winter tyres..) and can you even use snow chains on AWD?

Looking at my car rental it does not seem to come with chains. Is it obligatory to have these? Also what realistically are the conditions going to be like? Driving will be done in the evening so not expecting any great sights which is a shame (unless anyone has recommendations of a particular route to take?)

Thanks.