......the car's Bluetooth system and not the phone itself. You might try contacting the dealership for help. They may refer you directly to the car's Bluetooth manufacturer or they may be able to resolve the issue.
I have purchased a Note 3 a couple of weeks back and I seem to be facing a very weird issue, and I certainly am hoping there's a way this can be resolved without me changing the phone. Also, please note that earlier I was using a Note 2 and this thing never took place.
I have paired my Note 3's bluetooth to my car, so that everytime I start my car, both the bluetooth devices are automatically paired and I can accept my calls through the internal car system without any issue. However, I have noted that sometimes the call timer automatically starts showing up on the car display, even when there is no call in place. I check my phone and there is no call in place. I try to press the disconnect call button in the car, but even that does not work. The only way I have found to get out of this is place a new call through the phone, and that replaces the existing display on the car and then disconnect the call.
Please note that my calls are not automatically answered on this bluetooth, and I am really hoping there is an answer or a feature that needs to be disabled or is causing this issue. Hoping for something real soon.