Did this job a few months back.

If I remember right, there are 2 clips inside the panel and you have to slide it towards the back of the car to get it off them. Before you can do that you have to remove the screws holding the trim to the rear pillars and release the window rubber from those and the roof panel.

You then have to release the first wire hanger holding the roof cloth trim and also the clips for the luggage net to get at the front fixing for the dampers.

You will need someone to help by supporting the weight of the tailgate so the pins can be released.

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Mick J
'08 Chrysler 300CRD (MB OM 642 engine)
'95 E220 estate
'89 230TE (R.I.P.)