When I bought my car; I was able to drive anywhere in the snow, even on my farm between the house and barn on steep inclines. Last year after buying new tires in the spring I had trouble driving up the hill in my driveway. My wife's Mercedes with 4 matic handles the hill in snow with no problem like I used to be able to. I get stuck at the bottom of the hill both last year and this year; when taken into the dealer he said it was fine and my tires are the problem, I didn't see much difference last year between the new and old tires and this year they are more worn.
It is frustrating to see the Mercedes fly up the hill and I am stuck at the bottom!