Genuine OEM Volkswagen Electronic Control Unit, part number 3Q0035840AX. This control unit is essential for the on-screen electronics system, enabling features like Bluetooth radio functionality. It is typically located within the dashboard assembly. The unit has dimensions of 0.2m x 0.19m x 0.06m and weighs 2.134 kg. Genuine OEM parts are vital for control units to ensure correct firmware, calibration, and seamless integration with other vehicle systems.