In 07 there was no auto tailgate. The fob just would unlock it. You then open in manually. There will be no height adjuster as after all you are lifting it and it will not go up by itself. It was not countered balanced as much as some trunks that fly up.

My new 35D does have one and I like them. They run off an actuator and not a piston which is why you can adjust the height,