I just went out to my garage to test the trunk lid. It seems that no matter what way the doors are locked or unlocked, you should be able to exit your car and walk to the trunk lid and open the trunk. If you are in a quiet place, and you pull the the trunk release on the door, you should hear a substantial thunk which is the trunk unlatching followed by a whirring of a motor. If you hear 2 whirring sounds, that is the trunk relocking. Usually happens when the trunk doesn't fully clear its latch sometimes caused by the springs in the latch being faulty. Your car will need to go back to the dealer. Make sure you can demonstrate the problem for the service writer or they may say they can't duplicate the problem.