I have a new VW Passat Estate running on Continental 235/45/ZR17 tyres. These big fat, low profile tyres seem to be the problem. You would think a heavy diesel lump over the driving wheels would be ideal but no. It is absolutely useless in the snow. Once out of my driveway, on to the residential street, which now has compressed, polished snow it won't go anywhere! I needed the asssitance of a neighbour to help by pushing just to get back into the driveway! The hand book says I can't fit snow chains to this size of tyre/wheel, presumably due to clearance issues. Has anyone got any experience of using "Snow Autosocks"? (http://www.roofbox.co.uk/car-snow-socks/autosock-company.php) I guess the other alternative is to buy a set of Winter tyres (and wheels)? What's the best car shipmates have for the snow?