This ding ding (always two dings) seems to come from the sone where in the front of the car. It always happens while moving, sometimes slowly sometimes at highway speed. Sometimes another car or two is near me and sometimes I am alone in the car. Sometimes my wife is in the passenger seat and sometimes I am alone. We always wear our seat belts so it is not a seat belt warning. I have checked the instrument panel but nothing seems to change there. It can happen when the radio is on and also when it is off. Sometimes it will go days without digging but other time it may do it two or three times in a 20 mile trip. Any ideas appreciated.