WHILE DRIVING DOWN THE INTERSTATE, SUDDENLY WE BEGAN TO SMELL 'SOMETHING' BURNING, AND THEN THE IDRIVE SYSTEM DISPLAYED A BATTERY ICON LIGHT FOLLOWED BY THE MESSAGE "CHARGING SYSTEM MALFUNCTION" AND CONTROL MESSAGES WARNING "YOUR BATTERY IS NOT BEING CHARGED". SECONDS AFTER THAT MESSAGE THE POWER IN THE VEHICLE BEGAN SURGING, AND ANOTHER MESSAGE DISPLAYED "4X4 SYSTEM AND DSC HAVE MALFUNCTIONED". AT THIS POINT WE WERE PULLING OVER, AND THE CAB OF THE VEHICLE BEGAN FILLING WITH SMOKE. THE 4 OF US EXITED THE VEHICLE AND WITNESSED FLAMES AND SMOKE COMING FROM UNDER THE BONNET. WE MANAGED TO MOVE SAFELY AWAY FROM THE VEHICLE AND CALL FOR HELP AS IT WENT UP IN FLAMES - BURNING COMPLETELY (BUMPER TO BUMPERR). IT HAS BEEN DECLARED A TOTAL LOSS.