Genuine OEM Mercedes-Benz Control Unit, part number A4479004705. This control unit manages the vehicle's starting sequence and the operation of various electrical systems. It is a critical component for vehicle functionality. The unit has dimensions of 0.1m length, 0.1m width, and 0.1m height, weighing 0.135 kg. Genuine OEM control units are programmed with the correct firmware and calibration for reliable and safe operation.