The Hella LVQ-212 (5DV007760) ballasts are original equipment on many early-century Audi, Mercedes, and BMW vehicles with factory HID headlights. However, headlight ballasts have a limited lifespan and can be expensive to replace outside of warranty, typically costing about $400 from the dealership. Fortunately, a cost-effective replacement ballast is available, designed to meet or exceed OE specifications and function identically to the original at a fraction of the price. It's recommended to replace both ballasts and bulbs together since they are rated for 2000 hours of run time to avoid future hassle. Additionally, it's important to double-check the part's compatibility with your specific vehicle, as certain makes and models may use different OEM HID ballasts.