The Mute button exists only in the Euro 0330 or newer software.
For you radio reception, make sure that the antenna is connected properly. For the one station you can receive, is the station name listed properly? Can you step FM in 0.2MHz steps and AM in 10kHz steps? If not you may still have the Euro radio software loaded, which doesn't work well together with the US navi software.
For you radio reception, make sure that the antenna is connected properly. For the one station you can receive, is the station name listed properly? Can you step FM in 0.2MHz steps and AM in 10kHz steps? If not you may still have the Euro radio software loaded, which doesn't work well together with the US navi software.