I've had my car for 4 months and have not had any issues with the bluetooth until now. In the past, I have been able to make a call from the phone book display without touching my cell phone...suddenly, it has to retrieve my phone book each time I try to display it and when I try to call from the phone book display, I get a message "call not possible". I can make the call if I dial from my cell phone directly...it will go through the bluetooth, I just can't use the display to make the calls. Any idea what I need to do to correct this?