BATTERY UNDER REAR SEAT SHORTED DUE TO MALFUNCTION OR CONTACT WITH WIRES ON BOTTOM OF SEAT CUSHION DUE TO INADEQUATE CLEARANCE BETWEEN BATTERY AND CUSHION. FIRE PRECEEDED BY LIGHTS FLASHING ON AND OFF AND MOON ROOF OPENING AND CLOSING. SMOKE CAME UP FROM UNDER REAR SEAT WHERE MY 14 YEAR OLD DAUGHTER WAS SEATED. FIRE EXTINGUISHED PROBABLY DUE TO LACK OF 0XYGEN. DEALER REPORTS MECHANIC HAS SEEN PRIOR CASE SIMILAR.