DURING STOP AND GO TRAFFIC, CAR BRAKED CAUSING THE PERSON BEHIND ME TO REAR-END ME. THIS HAD HAPPENED ONE OTHER TIME BEFORE, LUCKILY THE CAR BEHIND ME WASN'T FOLLOWING TOO CLOSELY AND I WAS GOING LESS THAN 30MPH. A COUPLE WEEKS AFTER THAT WHILE GOING HIGHWAY SPEEDS AND WET ROAD CONDITIONS, A WARNING LIGHT CAME ON STATING THERE WAS A PROBLEM WITH THE COLLISION MITIGATION BRAKING SYSTEM AND TO SEE DEALER. ONCE THAT WARNING COMES ON CRUISE CONTROL ALSO DISENGAGES. THIS WARNING LIGHT HAS COME ON ONE OTHER TIME, WHILE DRIVING HIGHWAY SPEEDS WITH DRY ROAD CONDITIONS. IF THE CAR IS RESTARTED THE WARNING RESETS AND ALL SYSTEMS ARE UP AND FUNCTIONING AGAIN.