Z4 Headlight Operation Modes?

[angelog]

I posted this on the main "General" discussion forum with no luck of any responses. I hope someone can help and describe how their headlights operate (what turns on/off with different light switch/ignition switch settings).

http://www.z4-forum.com/forum/viewtopic.php?f=2&t=29757#p405004

Thanks

Angelo