Some of the functions of my steering wheel are not working on Xbox, why is this?

Functionality on Xbox consoles is limited by the Xbox OS. Our Xbox-licensed Steering Wheels have almost the same number of usable inputs as the standard Xbox controller (gamepad). Only the 'LS' and 'RS' (clickable sticks on the Xbox gamepad) are not accessible. When you connect an Xbox wheel to a compatible Fanatec Wheel Base, all connected Fanatec hardware becomes detectable by the Xbox, i.e. the wheel base itself, the pedals, the shifter, and the handbrake. Some of our wheels have many additional buttons and switches that you don't find on a gamepad; these inputs are either mapped as duplicates of normal gamepad buttons or have no function on Xbox. Steering wheel displays and LEDs are also not currently supported by the Xbox OS (the display is still accessible to adjust Tuning Menu settings). Microsoft is in the process of opening up the Xbox OS to support more features of third-party input devices in the near future.