Not sure what you mean by "brochure", but here's one for 2006,
from the Front Page of This Site:
http://www.xoutpost.com/pdf/BMW%20X5%...%20Catalog.pdf
And, the Owner's Manual, too...also found linked on the Front Page
of this Site:
http://www.bmwmotorsports.org/pdf/BM...20-%202006.pdf
GL,mD