I have connected my phone via bluetooth to the car and have no problem receiving/sending phone calls when the infotainment unit (radio) is on. However today I noticed that unless the infotainment unit is switched on there is no indication that bluetooth is working. On my last car (Nissan Note) bluetooth worked as long as the ignition was switched on. So do I need to have the infotainment unit on to receive calls (I know I need to switch it on to make a call).