For C250 C350 C63 2012 2013 2014 Xenon HID Ballast Control 130732931201 A1669002800 130732926301 Materials: The xenon headlight ballast is made of metal, offering a long service life and robust durability Function: The ballast provides a stable voltage and current when the bulb is lit. Without a ballast, the bulb would consume excessive power, causing it to extinguish quickly. A ballast prevents this from happening and ensures you get the most out of your bulb's lifespan Headlight driver module, intelligent decoding eliminates faulty lights and improves light stability。 Xenon ballast, low power consumption and high brightness, no decay for long time use。, Manufacturer: LLYIXUAI