This thing just will not ask for a code. It is the same model as the old one. I am even using the old connector into the internals of the back of the machine. The connect Nav sees it, knows how many disks are in and how many tracks on each. It even shows as playing. The numbers on the old changer lit up green when cds were inserted. The new ones stay red. It is very frustrating. Does the changer have to be a specific Fiat one?????? My old one had a Fiat sticker on it this one doed not.