I WAS DRIVING MY 2012 JEEP GRAND CHEROKEE OVERLAND TO WORK, WHEN I SMELLED SMOKE. I IMMEDIATELY DID NOT KNOW WHERE IT WAS COMING FROM. ALL OF THE SUDDEN THE SHIELD COVERING MY SUNROOF OPENED BY ITSELF. THERE WAS THEN VISIBLE SMOKE ON THE OUTSIDE AND THE INSIDE OF MY CAR COMING FROM ABOVE MY HEAD AND THE HEADLINER VISOR AREA. THE SMOKE SOON TURNED TO FLAMES JUST INCHES ABOVE MY HEAD ON THE DRIVERS SIDE. I HAD TO PULL OVER IMMEDIATE AND GET A FIRE EXTINGUISHER, AND PUT THE FLAMES OUT AS THEY STARTED TO SPREAD TO THE INTERIOR VISOR/ CEILING AREA. THE FIRE DEPARTMENT ALSO HAD TO COME AND THEY MENTIONED THAT IT LOOKED LIKE IT WAS AN ELECTRICAL ISSUE AS THERE WERE WIRES HANGING DOWN. THE JEEP HAD BEEN TOWED BACK TO THE DEALERSHIP AND I AM IN THE PROCESS OF TRYING TO FIGURE OUT WHERE TO GO FROM HERE.