^LOL Qsilver @ compact florescent bulbs being new fangled. Skip those and go right to LED... they are down right futuristic. Wife and I have the whole house done in them... even the 4ft tubes in the garage are now LED.
For the OP... I am dealing with this same issue. Probably just a connection issue or a bulb dying. But the insides of these headlights tend to have wire corrosion on the sheathing which can sometimes have a problem. Same thing happens to e46, e39, etc cars of about the same age. If a simple bulb swap doesn't correct it, you might look at the wiring in the light.