I hope I'm not replying to a dead thread... but your post convinced me to go with the Sony XAV-AX4000. I'm also using the Maestro RR with the prewired harness, so I'm ready for the plug-n-play install.
My one question is: Did you have to cut any of the trim from the rear of the unit inside the dash?
My one question is: Did you have to cut any of the trim from the rear of the unit inside the dash?