ADDITIONAL security was provided with the latest upgrade in the form of a more sophisticated engine immobiliser, which is now separate from the locking and (standard) alarm setting system. A remote keypad or the key itself can be used to operate the various options of locking, deadlocking and alarm setting. The immobiliser inhibits both the starter and fuel injection and is controlled by a combination of password and rolling-code communications between a transponder in the key and an antenna ring around the ignition key slot.