I have a 2003 C3 and have just bought a Clarion CD radio off Ebay (which was from another C3). Do I need to get it programmed to the car? When I put it in the car it just beeps. Also when I bought the car there was a spare key. The key will open the door (not all the doors/central locking) and when the key is put in the ignition, the engine turns over but does not fire. Are these the symptoms to a key that is not programmed to the car? Thanks Martin