the bulbs are blown most likely. pull them out and check first though before you order anything. Make sure the bulbs are shot. If not, then start looking towards the ballasts for problems. I believe the bulbs usually are what the problem is. There are places you can order less expensive replacements. You will then need to consider what you want as far as D2S replacements...4300K are the most white, most light dispersion, the higher level you go, the more blue/purple you go. Some go with the higher numbers for the way the car looks to others, but in my opinion, if you want to maximize your light, the main reason to get Xenon, shoot for replacement 4300K bulbs. You are still looking at around $200 or so for 2 bulbs is my guess.
Hope that helps
cheers
jon
Hope that helps
cheers
jon