No its a mod I am working on with maybe using the reverse camera pin on the rns which need 12v on to switch to cam/media adapter or relays on the speakers through rear amp to mute or using the mute pin on the rns.
But something to know for you all, the last option funnily enough has a little unknown hidden problem, when you connect the btooth oem, the mute pin does seem to be disabled from using with anything else, so it only allows the mute pin to work when the btooth requests mute, can you beleive that.
So my theory of mute pin for reverse signal was 1st out the door, so I will be testing this theory when I have repaired my laptop with new screen tomorrow, to see if when I disable/unplug btooth from the CAN if the mute pin goes back to full functionality, gotta update PetrolDave on this to over on navplus, be a **** if it does disable the pin with btooth, seems to be CAN switched so when btooth is in use, it sends signal on CAN to rns to say ok enable mute pin, then btooth sends mute ground & then radio mutes with btooth on certain speaker, then when its finished the call its releases the ground & then sends signal on CAN again to rns to disable the mute pin again, can you fecking believe that.
I will be testing all my theories this weekend I hope in prep for my Primary Domain Controller fitment.(park distance control they used to call it)
Yeah great fun maintaining domains huh, glad I dont sit in essex supporting the world on a subbing job anymore, god remoting over a vpn to a laptop in portugal was a real PIA, ****** vpn was so slow as it actually went to LA to the concentrator then back to europe, joy huh especially since the fecking link to LA was something ridiculously small, we're talking k's not Mb's