ON top of the factory immobiliser system fitted to all Liberty models, the B4 is equipped with a dual stage security system. The remote central locking transmitter operates one system, while the other requires a PIN to be entered into the keypad located beside the handbrake. The higher level system provides additional points of immobilisation including an anti-hijack mode, automatic re-arm, intrusion alert, false alarm protection, internal screamer, infrasonic sensor and valet mode, as well as anti-cross-pollination software for extra theft protection.