FRONT END IMPACT INTO A TREE; MULTIPLE AIRBAGS DEPLOYED WITH THE EXCEPTION OF THE PRIMARY DRIVER'S SIDE STEER WHEEL AIRBAG. THE CAR SENSED AND ATTEMPTED TO CALL 911 BUT WAS IN A RURAL AREA. JUST CONCERNED ABOUT WHY THAT WITH ALL THE OTHER AIRBAGS DEPLOYED AND NO SENSOR NOTED TO ACTIVATE THE STEERING WHEEL AIRBAG.