Section 2789 (Transfer Case - Tightening Torques)
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2012 BMW 328xi, 2011 BMW 328xi, 2010 BMW 335xi, 2010 BMW 328xi, and 2009 BMW 335xi. However, it is still accessible from the selected car via links, so may be relevant.