Just in case your stuck on a desert road in Vegas at 3am and can't figure out the proper way to change a spare and nobody is logged on Bimmerfest to help. Or for you lurkers and trolls that bought your car used sans manual.
http://www.bmwusa.com/Standard/Content/Owner/dgh.aspx
http://www.bmwusa.com/Standard/Content/Owner/dgh.aspx