These tires are hopeless for real winter driving conditions. Buy these tires and get ready to slide to a stop, drift around corners, experience moments of terror as you drive on mountain highways.
These might be good for driving in the city on well sanded / salted roads, but they completely fail on ice, frosty roads, and fresh or packed snow. No tire is a substitute for caution and skill, but theee are a waste of money. Toyo, nokian - much better!
How Mercedes can sell these in their winter package eludes me.