My sunroof will vent but will not open and makes a clicking noise when I try to open it. One thing I am fighting is that I have no idea what this thing is supposed to do when it opens. When the sunroof is opened does it travel to the back completely so all of the opening in the roof is open? Or does it only travel partially into the opening? I have the FSM and the Owner's Manual and they both assume the reader should know how it works. Just frustrated.