Xenons4U offer the best 5DC009060-00 AFS-GDL-Steuergerat Xenon Ballast that fit only Mercedes-Benz E-class cars such as W211 and S211 Facelift with factory fitted D1S 35W gas discharge bi-xenon headlamps. If your xenon lights have stopped working or they are blinking then Xenon HID Ballast has failed and needs to be replaced.