VEHICLE IGNITION TURNED OVER AND BEFORE 30 SECONDS I NOTICED SMOKE IN MY PASSENGER SIDE MIRROR. I EXITED THE VEHICLE AND FOUND A SMALL ELECTRICAL FIRE BEHIND THE PASSENGER SIDE FRONT DOOR HANDLE. THE VALET LIGHTING WAS NOT INVOLVED BUT I BELIEVE IT WAS THE TOUCH SENSOR USED TO LOCK AND UNLOCK THE VEHICLE. IT WAS RAINING AT THE TIME OF THE EVENT AND I WAS ABLE TO SMOTHER THE FIRE WITH A WET TOWEL AFTER SHUTTING DOWN THE IGNITION ETC. MELTED PLASTIC AND RUBBER WAS NOTED.