19-20 Mercedes-Benz W205 W213 HID Headlight Control Module A2139002616 Left Complete Light

This part directly replaces the original factory number A2139002616, left headlamp assembly, for 2019-2020 Mercedes-Benz W205 and W213 models only. Not for other years or models. It controls HID lamp power supply and adjustment functions to ensure lighting brightness, height, and steering-assist operation. After installation, it resolves symptoms of headlamps not lighting, flickering, or vertical adjustment failure, restoring nighttime driving visibility. If headlamp activation is delayed, flickering, or instrument-cluster lamp fault occurs, the module may be aging and should be replaced promptly.