I have found many wiring diagrams available through our local library, but I just checked and they don't have them available for the 2009 at this time. So check with your library and you may find that information is available online.
In the mean time, just keep digging at those diagrams in the Bentley. They will start to make sense eventually.
I don't wanna die but if I have to, I wanna die last. - Robert Mitchum