Download Introduction The and some VRX models. It provides Bluetooth Mobile Phone connection, DVD, GPS and general radio/CD functionality. Safety precautions built into the system prevent the use of many functions above approx 4 kph. This limitation is not over rideable by way of software configuration and hence the design and development of the MMCS Override Interface. This device provides two modes of operation, override and standard. Override mode will alter the vehicle mode The interface should be installed by someone experienced in installation of electronic devices. This manual outlines the steps involved in the installation. Please device accept no responsibility for potential harm caused to existing equipment including the vehicle electronics should be checked prior to installation.