<div> <h1>Headlight Ballast for MERCEDES-BENZ E-CLASS W212 (2009-2016) for Xenon</h1> <p>A direct-replacement headlight ballast (control unit) that powers and regulates the headlight. It restores correct, stable lighting when the original unit has failed.</p> <p><strong>Features</strong></p> <ul> <li>OEM-grade control unit built to the original electrical specification</li> <li>Direct replacement for the failed factory ballast</li> <li>Steady, flicker-free output for safe night driving</li> </ul> <p><strong>Specifications</strong></p> <p><strong>OEM Numbers:</strong> A2189007306, 2129005424, 2129008324, 2129003317, 2189006604</p> <p><strong>Fitment &amp; Care</strong></p> <p>Fits the original ballast location and connects to the existing headlight wiring. We recommend fitting by a qualified auto-electrician, as some applications may require coding or programming to the vehicle. Supplied as a single ballast unit. No routine maintenance required.</p> </div>