Hi, on the XJ8L the headliner should come out the rear door. On the short wheel base cars it has to come out the back window. The rear glass needs to be removed in order to remove the headliner. Since you have an L you should be fine coming out the left rear door. Click here for the workshop instructions to remove the headliner.
How does the sunroof panel come out?
BTW, The removal instructions were perfect
The sunroof panel should just slide out once the headliner is removed. I don't recall if you have to pull the roof panel out. I'll attach the instructions.
Remove Roof Panel
I don't show anything specifically for the trim panel.
This is what I need. Thank you