We have a 2013 Journey with the RE2 system (with Sirius) and we bought an RB5 system from a 2013 300 and everything works except there is no nav button. I have read hundreds of upgrade posts but I still don't know why it won't work. I took it to my dealer to get it programmed but he flat out said you can't swap radios. I then took it to the parts to make sure it was an RB5 by the part number and his computer says that it doesn't even have Sirius which it does and it was activated. Basically what I'm saying is I need help or any ideas on what to do next?

TL;DR we have a 2013 Journey no nav, we bought an RB5 from a 2013 300, we swapped radios and there was no nav button and I need ideas for things to do to get it working.