My head lights will not go on , yet the tail lights and parking lights work fine. Even the turn signals work.
is it possible you were driving for awhile on one headlight and now the second one just burned out? the reason I ask is the odds of both bulbs going out at the same time is astronomical but everyone here with 06-09 d4r HID bulbs complains that the bulbs don't last. Youtube has video showing HID replacement without removing the entire bumper, take your time and always use a fresh pair of latex gloves when putting a new bulb in. be careful there are a lot of counterfeit philips d4r HID bulbs on amazon.
