Manual states: "Using a trim tool, disengage the retainer clips from the door trim panel to the door panel." I don't know which tool to use or how to use it (wedge it in, tip to pop the clip up, push it, hook something inside and pull it?)
I have a tool that looks like the 3rd one pictured in the link given below; "door upholstery remover". Two frames above that is a picture of 5 tools in a panel removal kit that are much latter.