Were you ever able to get your stereo working? Been thinking about upgrading my 11 to newer hardware as well.I got as far as putting a head unit from a 2014 (no navi) into my 2011. Found wire harness adapters that would convert from the 2011 to 2013+ harnesses. Unit powered up but there was no sound. I have double checked my splices, but no audio. Might be a ground issue, it would only turn on when the metal frame was touching the metal frame of the dash.
Other issue is finding a trim piece for the unit, a regular after market kit isn't wide enough for the OEM head units.
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