I faced my first issues with the new car some fifteen days ago......when all of sudden all the controls on Navigation Unit stopped working.....I was not able to increase or decrease volume......change source......or even switch it off......it gave me a shock when I switched the car off and took the key out of ignition.....the navigation unit continued to play the radio.....ultimately I had to disconnect battery to switch it off.......
This was something that I had never faced earlier with any of my cars......
This happened again the following day and I decided to take the car to dealership.......There I was immediately introduced to the reset button just beside the gps-card-slot.......I was told that there was an issue with the navigation unit and Atlas had not been able to sort the problem out........the only option till then was to reset every time the problem occurs.....they had no idea what made the nav-unit to behave like this......
From that time onward I again faced the same problem once and after resetting the unit.....it became okay.....
Now.....I have guessed that this is actually the Bluetooth pairing with my GS4 that may causing this issue.......This problem first occurred on the day I bought the mobile and paired it with the unit......this continued to happen till whenever I received or made a call.......I have now turned-off the blue tooth and the nav-unit has not faltered again......this was okay with my Note-2 earlier