I have been driving for over 50 years and am pretty experienced. I have driven many times in ice and snow. In the past 2 of years, there were 3 occasions when I was driving my RRS in snow slowly on a traveled road in the snow setting. Going down a slight decent, when it came time to brake, there was absolutely no braking. On and off the brake and even pumping did little. Fortunately escaped ok. The car is great otherwise in wet or dry. With my other suvs I have never had a problem. I am running the stock Continental Contisilent tires; not full depth but also not near to the wear indicators. Is it the tires and possible ice, or do I have a problem with the ABS. Again, I'm driving slowly and carefully and easing on the brakes because of this. All the other 1000's of braking occasions in snow the car brakes properly. I'm thinking of chucking the car if the car is at fault. Any feedback appreciated. No abs lights came on that I am aware of.