to remove the lift-gate trim you will need a Philips screw driver and a trim panel removal tool. a stiff putty knife will also work, but the panel tool is inexpensive and a useful tool.
1. remove the 2 Phillips screws that retain the grab handle and the handle.
2. there's 1 Phillips screw under the small cover/plug near the window latch. pop the cover off and remove this screw (note: i've found this screw is sometimes missing).
3. insert the trim panel removal tool between the panel and the lift-gate at the base of the window and slide it upward until you encounter the first retention clip. i believe there are 2 on each side of the window and 3 or 4 across the top.
4. once all the clips are popped loose, the panel is hung on the lift-gate with a series of plastic hooks. simply lift the panel upward and it will come off.
tip: to remove the 2 torque screws that go through the glass (if necessary) spray some penetrant on the screw's threads, hold the back side (where the lift support attaches) with an adjustable wrench.