Well, my dealer said that "As your ordered BMW has already completed production, a modification is regrettably no longer possible"...
In fact, I will drive mostly during daytime, so xenons will not make a huge difference. The GT I tested during a weekend in the city had xenon lights and I didn't see much difference from my previous car, which had halogen headlights. I suppose that in highways it will make a significant difference. I wanted them most just because they look much better (from outside). Maybe in my next BMW...
I am Brazilian and moved to Vienna some months ago. My native language is Portuguese. I've already studied German for 2 years before coming to Austria and I still have classes. Speaking is still difficult, hearing is ok when locals speak slow (the viennese dialect doesn't help) and I can read some texts without much trouble. So the text you sent me will be quite useful.
By the way, I ordered the car with the default language set to German.