Xenon Planet is one of the largest and fastest growing online retailers of specialized automotive products in the USA, Australia, Canada and all around the globe. We take pride in offering Mercedes-Benz A2139005711 Lear 504217F05 HLI Max Psi LED Control Unit Module ballast. It is responsible for controlling LED lights such as low beam, high beam, daytime running lights DRL and front turn signal indicator. Coding is required after replacing this part. If you are unsure about A2139005711 Hli Max Psi LED Module’s fitment and vehicle compatibility list, then visit our website for complete assistance.