The car makes a loud roaring sound at about 45-50 mph and the dealership says "probably the tires" but doing some research there seems to be a lot of people with similar problems and add to this it randomly downshifts while braking (or maybe it is the brakes) when coming to a stop which would cause the car to lose control on a snow/ice/slippery situation, this happens at a slower speed and only when slowing down at about 10-15 mph. i am not sure what is causing this and there are multiple complaints out on the internet and no real solutions.
Went to the local service station about a low tire pressure warning. the mechanic noted that continental and michelin tires have had an issue of tire rot. the air comes right through the side wall of the tires. he recommended new tires to fix the problem. he also recommended and american manufactured in the usa.