This will explain why there werent in a hurry to change info for 2008 X5 earlier, they were working on updating to new site.

On a side note, there are now drivers guides with video training on features and operation.
What doesnt really stick is that they only have up to 2007 and not for 2008, but in the technology for convinience and safety section when they describe parking brake, they show a video with Auto H button, Additionally in the Mobility section they describe that there are 2 keys and one more valet key.
I assume 2007's had valet key and they just recorded videos on an 08 model but didnt catch up with all 08 videos yet.