I would like to know this too! I have a 2015 RS with mylink, nav, and upgraded pioneer system. Looking to upgrade all my speakers to aftermarket ones, add two amplifiers, and a subwoofer. I'm not very savvy on audio installation and been trying to find a wiring harness, or similar, for this car. I was told by the audio place that I was going to use that they couldn't install all the speakers because they were worried the 2014 harness wouldn't work.
EDIT: I do have a separate thread for this issue in Gen1 Audio & Electronics! Any help would be greatly appreciated. I'm really looking forward to getting quality sound and a sub!
