HID Anti Flicker Capacitors - Error Code Canceller (1 Pair) Stealth Auto anti flicker HID capacitors are useful for vehicles that get a Flickering or strobe effect when installing after market HID kits . Also they will eliminate "Bulb out" warnings or "bulb failure warnings in Mercedes, BMW and other cars. 300C, MAGNUM AND CHARGER OWNERS DUE TO THE FACTORY REVERSE WIRING OF THE LX HARNESS THE CAPACITOR SHOULD BE REVERSED!