In the last cold snap we had a few weeks ago when we had some now here in the Midlands I found driving my 330 around here on all the ungritted roads a real nightmare. It took me about 15 minutes to even get the car off my drive one evening, I would pull off and I couldnt even get enough grip to turn the wheesl so I was slithering in the middile of the road unable to pull forward and turn. I had to 'rock' the car from reverse to drive on the spot to actually get enough traction to get it moving forward again (good tip that, one my Dad gave me, and it worked for me). I did eventually get it off the drive of course but it was quite an experience for something so, seemgly simple, then then I had to move it forward it a straight line about 20m to the end of the roar and turn left, that was easier said than done, actually getting any traction to move forward took me a while, I finally managed to creep ever so slowly, just using engine compression to pull me forward was still causing the traction control to go nuts.
All the fwd cars were driving about like everything was more or less ok, I had trouble even keeping my car in a semi-straight line driving down a road near me that had not be gritted and was iced over, the dodgy camber didn't help much either.
My car is a total pig to drive in the snow and ice, I came so close to having several accidents despite me hardly moving at all, just trying to get around corners near where I live without sliding and hitting someones parked car. Hopefully the Council grits this time.