I wouldn't be surprised to see an xDrive 140i if there isn't one already. xDrive 1 Series are much more positive at the front end leaving you in less fear of losing the back end on a public road with a car coming in the opposite direction. Generally cold weather tyres or good all weather tyres like Michelin Cross Climates or Goodyear Vector 4 Seasons are more use in snow and slush than four wheel drive is.