smart radio 10

Greetings all! I purchased a 2008 smart car convertible last week. Attached to my radio is in this picture. It looks like a phone or bluetooth connection. I took out the stereo and followed the wire but it didnt really lead anywhere that i could tell. I am very techno savvy and I looked...

Last month my Smart Radio 10 began showing the message, "PHONE/NAVI", which I cannot get off ... Sometimes it lasts 2 or 3 days, sometimes just a few minutes. I have tried many things to figure out what is going on. I have kept my phone powered out, not carried the phone with me while I drive...