I have been having an issue getting the rear seats to lock. I went them to lock into place to keep the noise and vibration down. When I push the rear seats back, they stay in an unlocked position which I can easily fold down or push back without using the key unlock above the seats. I've tried turning this with the key, going in the trunk and pulling the child lock release I haven't been able to get the seat lock mechanism to latch locked. Nothing appears broken so I am a bit confused as to what to do to fix this. Does anyone have any suggestions?