If the car is locked, the rear hatch is locked also. Lock the doors and leave your key inside the house and try to open it. It is locked.
Side note, there are (2) buttons on the rear hatch. The round one is the lock and the square one is the opener. If you push the round lock button, it will open the hatch.
Side note, there are (2) buttons on the rear hatch. The round one is the lock and the square one is the opener. If you push the round lock button, it will open the hatch.