During the cold weather my ulysse 2.0 2004 petrol auto has started beeping and the engine light flashes and the display reads anti-pollution device inoperative but the car drives normally and doesn't use any extra fuel - it will reset itself after a few weeks but a cold snap brings it back - can anyone tell me how to reset the light and beep manually - also the display for the sat nav has gone there is a tiny plastic blanking plate which seems to hide a bulb holder can anyone tell me how to get the thing out ! apart from these 2 things the car is excellent and far better than the galaxy it replaced apart from the dealers who are atrocious the worst I've ever experienced anyone know a good specialist in North London or hertfordshire Oh I nearly forgot is there any problems with replacing dipped h/light bulbs I should know about ?