Genuine OEM Mercedes-Benz DC Charging Port Control Unit, part number A0009000850. This control unit is responsible for managing the functionality of the vehicle's DC charging port, ensuring safe and efficient power delivery. It is typically located in the rear of the vehicle. This unit weighs 5.573 kg and measures 0.36m x 0.13m x 0.32m. Genuine OEM control units are critical for ensuring the correct firmware, calibration, and signal characteristics required for the complex electric vehicle charging system.