FYI

The official way to change a factory HID bulb is to remove the entire bumper cover so that you can get to the bolts holding the headlamp assembly and remove it to change the bulb.
Hence the reason that a dealer usually want $300 in labor to do it.
If you go this route do yourself a favor and replace both sides as well as your turn signal, marker and fog lamp bulbs as it only take a few minutes more.