Was driving yesterday, and my bluetooth worked just fine.
When entering my garage, the screen said "Phone defect". Turned off the car and back on, screen kept loading for eternity and finally said "communication error".
I left it for what is was, tried again this morning and everything worked fine.

I know these cars are sensitive about their batteries, the batt isn't new but I do at least 2 one-houre commutes a day and she starts almost immediately. Have no indication that the batt would be at fault.

Everything works again, but as I spend a lot of time per day in my car, and am on the phone quite a bit, would hate it if it happens again. Could this be something as simple as a bad connection, or do you have other experiences ?