I took delivery of an '04 325xi two weeks back, and it has the tilting passenger side mirror. Believe me, it's not worth spending any significant amount of money to add it. It's so easy to park the car anyway you don't need that gadget IMHO.
Frankly, BMW might want to focus on adding side window defoggers so you can see out of the side windows in rainy weather rather than tilting mirrors and headlights that bob up and down. Even a 10 year old Honda has side window defoggers. Does it not rain or snow in Germany?