A system and method for wirelessly activating or deactivating features that are safety issues associated with a mobile multi-function device user interface based on user proximity. A mobile telecommunication device configured with a mobile multifunction device user interface can be paired with a multifunction device utilizing a wireless communication link (e.g., Bluetooth). A proximity detection mechanism with respect to the wireless communication link can be configured in association with the mobile telecommunication device to set a user proximity range. A permanently disabled feature due to safety concerns can be automatically enabled when the mobile user interface device is within the programmed range. The features can be automatically disabled if the mobile user interface device is out of range. Such an approach controls the device functionality based on the user proximity for correct and safe operation of the device.