Check You Tube. I remember seeing a video that tells you how to do it. I believe it is the yellow wire on the top right. Sorry to be so vague.
they may have changed this, but you used to be able to just ground that wire for full features while driving. You should give that a try.
oh, and I don't know where the VSS wire is.
Wire colorG9-3 (SPD) - G6-7 (GND)
It's described as "Speed signal from combination meter".SB - BR
I already did the navigation overide. I am looking for the vss wire to make the navigation more accurate.