HID Xenon Headlight Ballast - Control Unit Module - Replaces 307 329 115, 8e0 907 391b, 1307 329 098 - Fits Audi A4, S4, RS4, A3, Cadillac DTS, Lincoln MKX, Saab 9-7x, Mercedes-Benz C300, S63 and more

• REPLACEMENT HID OR XENON BALLAST - is responsible for supplying power to your headlight's bulb. Overtime your HID Ballast can fail resulting in a headlight that flickers or does not turn on at all. Every ballast is designed to connect directly to your vehicle and requires NO programming or coding.
• FITS THE FOLLOWING VEHICLES - 2008 - 2009 Audi A4, S4 Cabrio | 2005 - 2008 Audi S4, A4, RS4 Saloon & Wagon | 2007 - 2009 Audi A3 | 2006 - 2011 Cadillac DTS | 2008 Lincoln MKX | 2007 - 2009 Mercedes-Benz S500, S550, S600, S63 | & more. See below for the full vehicle list.
• REPLACES PART# 307 329 115, 8e0 907 391 b, 1 307 329 098 - Each of your vehicle’s headlights has its own ballast. These ballasts are commonly mounted either on the back or on the bottom of the headlights. While the HID Xenon Ballasts do commonly fail so can your factory headlight bulb.
• OEM FIT, QUALITY, FINISH - This AA Ignition HID Xenon Ballast is a direct replacement for the ballast on popular Audi, Mercedes-Benz, Saab, Cadillac, Lincoln, Saturn or Volvo vehicles including models with years 04, 05, 06, 07, 08, 09, 10, 11.
• LIFETIME WARRANTY - This HID Xenon Ballast comes complete with a lifetime warranty. If the ballast ever fails simply contact us for a replacement. Please make sure that the part you are replacing looks exactly like the one pictured. Save hundreds off of dealer prices by replacing the part yourself.