Another small but very easy to retro fit
AUX for the RNS!!!!
EddieNL can make up the loom and supply the button so all you have to do is make a small hole for the AUX in your armrest or to be honest you can put this anywhere
the other end of the loom(Blue plug) goes into the big stereo plug and there is only one place it can go then code it in your radio or navigation for AUX and then on the RNS you just tick the box for AUX and you are good to go
scott