Sorry for taking so long to log back in.... I followed the stock wiring from the center console along the floor to the edge of the door then up the c-pillar and back through the channel below the rear window.

I'm thinking I might need to do just a tiny bit more since there is a faint alternator whine that is audible when the sound is very low.

I'm happy with the setup and would probably do it again.


And an update on the Kenwood. I did get advice that the 519 wasn't that great and the call quality of the blue tooth was pretty bad. I can say that it was, I got all sorts of feedback when on calls but after performing an update via flash drive the call quality is 50x better, still not like a 2013 BMW but good enough to make it usable.