July 1: So it begins. Don't worry, this is not in the correct legal jurisdiction!
Section 3 (System Wiring Diagrams): Navigation
WARNING: This page is about a different car, the 2003 Porsche Boxster. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Navigation Circuit, W/ Bose System (1 of 2)
Fig 2: Navigation Circuit, W/ Bose System (2 of 2)