Part number 71745049 inner LH door handle I fitted today. After a long time with a bit of string, partly my fault. Briefly, window down, ease tweeter away from the door, it has 3 flat plastic tongues in spring clips, and remove the cable. I went for the window switch next, lifts from the rear and has 2 self mangling thin steel clips (reshape after) and a tab at the front. The arm rest has 6 flat plastic tongues in steel clips which need some force, but they just lift straight up. 3 6mm screws with 4mm hex heads, one behind the handle, 2 under the top of the arm rest.
Door interior panel, I started by the speaker at the front, and managed to lift enough to get fingers in and a sharp tug did it. I have a light in the bottom which is now easy to remove, or just the cable.
There is a panel retaining clip near the top of the front edge of the door, so you need to swing it fairly wide. I used a thin piece of wood to gently persuade the panel to lift, and the handle will be seen screwed to the back of the panel (20 torx). Also take cable off speaker, and remove the door release cable end.
All caused by the over strong spring in the handle, which cost £16.77 total.
Hope this helps