ok so didnt want to necro an old thread. have a vy calais key worked fined this morning not tonight cant unlock the car. appears the key wont open the door either... tried to open the key but not like a vs key they are glued shut and the battery is welded in there. can you buy them coded or have to get them coded? do they need the old key to do it? if i buy the key do you get the black bit and the key or just the black bit? can i put a battery in the old key and keep it as a spare or is it useless when its gone flat?