Genuine OEM Volkswagen Interface Box, part number 5K0035730D. This unit provides an interface for telephone and Bluetooth connectivity within the vehicle's infotainment system. It is positioned as item 10 in the diagram, part of the audio and infotainment system. The interface box measures 0.215m in length, 0.14m in width, and 0.025m in height, weighing 0.853 kg. Genuine OEM interface boxes are programmed with the correct firmware and specifications for seamless integration with the vehicle's electronics.