I try several times mate...tbh without starting the car....
I try with my OnePlus3 phone, with my wife Samsung S7 Edge....and bouth made the same thing...connect, then after 3-4 secs is disconnecting.
Yesterday i try with 2 old phones, one Motorola V3i and a Nokia 6310i, and with bouth phones, after i enter the pass key to pair, bouth of them stay connected, and i can see the phonebook on the screen from the car.
Soo....whats the dilema???