Hopefully my last fault post. Please help. ( how desperate I sound). When I get in my car and open the door the red 'door ajar' warning light' illuminates on the dash board. When I close the door it stays on. When I start the car the red light goes off (all doors and boot are shut). When I park up and take the key out it comes on again, even before I open the door. I then open the door, get out and lock it with the fob. The interior dome lights go out but the red ajar light stays lit. Help. P.s, will this eventually drain my battery or is the little red light too insignificant.