Just FYI, I ordered one as an accessory on my 2015 CX-5. The car was delivered late september, however the dealer was unable to install it due to soft- and/or hardware faults.
So up to now the reversing camera and the wiring harness is still laying with the dealer - dormant.
The German forum describes this fault as well, and it seems dat Madza Germany promised a solution to become available as from january, 2016.