Genuine OEM Mercedes-Benz Roof Control Unit, part number A00090018199051. This control unit is responsible for managing the various functions of the vehicle's roof system. It is typically located in the headliner assembly. This unit has dimensions of 0.28m x 0.06m x 0.23m and weighs 0.631 kg. As a critical electronic module, genuine OEM ensures correct firmware and sensor calibration for reliable operation.