Twist the ring and make sure that the locking tab is completely out of the slot. With the connector off, you’ll be presented with the back end of your D2S HID bulb. The bulb itself is held in place by another lock ring. To remove it, all you need to do is turn it counterclockwise. Xenon headlights have a ballast to ignite the high voltage xenon lights when they turn on that can remain energized even if the lights are turned off. Be sure to disconnect the headlight assembly or battery before attempting to replace it. If your 6 has a HID headlight burnt out, it could be a burnt out bulb or failed headlight ballast. BMW Z4 Coupe (2006) Project Time: 1 hours. Tab: $300. Talent. Tools: Phillips & flathead screwdriver, T15 T25 Torx. Parts Required: Headlight assembly, headlight bulb, active headlight or Xenon module. Performance Gain: Repair damaged headlight assembly, replace faulty headlight bulb. Complementary Modification: Replace turn signal bulbs. Features BentleyPublishers' MINI Cooper 2007-2011 Repair Manual (ER56, R55, R57) - http://www.bentleypublishers.com/c/BM13How to replace the Xenon headlight 7 Insert gas discharge lamp (1) into Xenon headlamp and hold in place. * Ensure that they are installed in the correct position (notch). NOTE: Do not touch the gas discharge lamp (1) with your bare fingers but use a grease-free, soft cloth. 8 Put on retaining collar (2) and rotate. Insert the lighting wires through the holes in the provided brackets. Mount the bracket in your desired area using the provided adhesive or hardware. Plug the wires into the lights. Run the wires On models with high intensity discharge (HID) or Xenon lights, the HID module is located at the bottom of the headlight. Water can enter the module electrical connector causing headlight faults. If this happens to you, you will have to replace the headlight, the electrical harness and the HID module. Xenon headlights have a ballast to ignite the high voltage xenon lights when they turn on that can remain energized even if the lights are turned off. Be sure to disconnect the headlight assembly or battery before attempting to replace it. If your RX350 has a HID headlight burnt out, it could be a burnt out bulb or failed headlight ballast. IEz4C.