I HAVE A BMW 735i I WANT TO KNOW WERE IS THE TRUNK OPENER?? I COULD NEVER FING IT.

Go to the trunk and put your key in and turn it all the way to the left and remove the key. This way by pushing the button at the trunk it will open, the trunk will lock when your doors are locked and the trunk will unlock when the doors are unlocked allowing the button at the trunk to work at that time. I'm not quite sure if your system works that way, or Try pushing the button that opens the trunk down by the hood release latch, or, you should have a remote key with the trunk open button on it, it should have 3 buttons, one is lock, one is open the car and one is open the trunk, if you have the automatic opening trunk, this should be the same, and to close it, just press the lock button and it should automatically go down again, as you did not specify what year yours is, one of them should do the trick...hope this helps

Try the glove box.