Hi, sorry to hear of your problems. I don't know if I can help but as I said in my post after losing my Sat Nav from working properly, it was when I couldn't even link my Phone through the Bluetooth system that the problem became more acute. I then had a system update from Motorola that I was able to then link the phone to the Amundsen. I thought I might as well try the Sat Nav and the blessed thing worked perfectly and has continued to do so ever since.
I can only guess there was some sort of signal problem caused by my phone that upset the Sat Nav and Bluetooth phone, but that is pure guess work. The radio and media continued to work OK. Hope you get it sorted.
Regards.