Apparently, not everyone's headlamps are operating the same as yours. Now that you bring it up, it will be interesting to see if there is a servo on the C6. Here is a thread from alt.autos.bmw. The poster also said he had an '02 that was bi-xenon, so based on your info, I am not sure if that was a mid-year introduction.

From: Trevor M (REMOVEtoEMAILtrevchaser@yahoo.com)
Subject: Re: Xenon high beams
Newsgroups: alt.autos.bmw
Date: 2002-06-13 00:52:13 PST


Hi Joe,

Your bi-xenon headlamps use the same outside light for both low and high
beam. If you were to put your car in front of a wall, day or night, and you
push forward to engage high beam. You will notice the Xenon lamp move up.
There is a shutter that covers the top portion when low beams are on and
when high beams are on, the shutter is released so the light output is of
high angle. The inside halogen lamp system is for DRL and for flashing.
Since before when we pull back on the highbeam lever, the highbeams would
turn on when you have the lever pulled back. Xenon are not good at flashing
on and off several times a second so the halogen is still there to flash.
Hopefully that sounds alright to you. Everything is fine with your car!

--Trevor--

> Hi. I have a question for those of you who have the Xenon lights installed.
> When I switch on the high beam on my new '02 330i, the Xenon lights go into
> high beam mode, but the high beam lamps next to the Xenons don't come on at
> all. Is this normal behavior or is something wrong with my high beams?
> Just want to know before I take the time to drive down to the service
> department.
>
> Thanks,
> Joe


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Ditto with my '02 M3