Compatible with Benz for S-Class W222 2018 2019 2020 White DRL Chip Ballast Chip Circuit Board Light Source Board Chip(A pair)

Daytime running light source module, direct replacement, immediate use. Stable performance, reduced maintenance costs. Material: Made of PCB, better heat dissipation. Protect internal electronic components from damage; Performance: This turn signal control unit provides the voltage required to start the light and adjusts the current of the light after the light is on; Function: Able to adjust the current and voltage to ensure that the bulb can reach the working brightness quickly and stably; Make the vehicle more recognizable on the road and improve the appearance of the car.