The owner's manual should explain how to replace the bulb and what type of bulb it is. I just replaced by H8's with superwhites. They make the spot quite tight to work around. There should be a twist cap behind each headlamp assembly and that's where you would remove the bulb (assuming non-xenon is the same set up).
Here's a link to the bulbs.
http://www.hid-lights.com/cat/hid-kits.htm
Good luck.