Genuine OEM Volkswagen Aerial Module, part number 7C0035540. This module processes and amplifies radio signals for the infotainment system. It is located in the assembly indicated by position 4 on the diagram. The module has dimensions of 0.1m x 0.1m x 0.03m and weighs 0.087 kg. Genuine OEM aerial modules ensure precise signal processing and compatibility with the vehicle's electrical system.