Performance Products has sourced these Bi-Xenon bulbs from the worlds most trusted manufacturers that make them under the strictest quality control standards. These Active Curve Illumination Bulbs increase your driving visibility by 90% over conventional, fixed headlamps because of the use of extremely bright, white light which closely mimics natural daylight. Active Curve Illumination helps you see better into corners at night, swiveling the headlamps as you steer up to 15 degrees. Trusting low quality, cheaply manufactured, one-size-fits-all, aftermarket Bi-Xenon bulbs can reduce the focal point resulting in uncontrolled glare and less optimum beam spread. Performance Products understands that compromising quality for safety in your Mercedes-Benz is not an option. We constantly source parts to bring you the best. Trust the people who know. Trust Performance Products.