Several times ( 5or 6)I have returned to my GLA to find the tailgate open, despite the car being securely locked. I have been so concerned about this, that I carefully check that the tailgate is closed from a distance when I leave the car, so I am sure this is not me accidentally touching the key fob and opening the tailgate.On two occasions, the car has been on my drive locked and with my car keys put safely away. On these occasions I have walked past the car (taking the dog for a walk) and the tailgate has been shut and on my return 30 minutes later the tailgate has been open.Has anyone else experienced this problem or got any suggestions?David