Looks to me from a DIY on the homepage you need to remove the center part with the airbag. Look here:

http://www.xoutpost.com/articles/x5/i...004-style.html

As far removing that piece, I suggest waiting until you get the new part. Once you get it, inspect it for clues on how it's connected. Maybe you can even write up a DIY for this for others.

Hope that helps.