Bluetooth problem in Samsung Galaxy Note 5

My new Note 5 (SM-N920I) has problems with bluetooth. I can not connect to my car, nor to my headset. However I can connect to my Sony Vaio and my smarthwatch Gear Fit (although sometimes it is disconnected) .
From what little I could see , there is a problem with bluetooth in Note 5, but still no solution.

Someone knows a solution to work properly ?
Thank you