Compatible with A8 2012 2013 2014 2015 Headlight ballast Control Module DRL 169909-00 5DF 177310-20 AA 4H0907472F

Daytime running light source module, direct replacement, immediate use. Stable performance, reduced maintenance costs. Material: Made of metal, 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.