I have a '00 328CI - Factory HID. It may not even be related to the HID but this is how I discovered it.
I noticed that when I would turn my head lights on, they would click on and off intermittantly durring the whole period that I was running them. When they would "flicker" or click on and off real fast, I can hear a click from under the dash near the glove box.
Now, while inspecting this more closely, I have determined that the lights do not need to be on and running for me to hear the clicking noise.
Is the HID powered even when not in use? Do I have a bad relay, or more signifigant electrical issue?
All electrically is running fine, and I have no other symptoms to describe.
Let me know what you think. This is really annoying, but I do find that people tend to move out of my way easier now!