Ayyy mother !! What gardens have you signed up!
We are talking about the back door, and you say that the inner panel does not take off? Not even dismantling the rear seat?
Try to break everything you have to break inside, which after all is cheaper and easier inside than on the outside, it is not the same to put a scrapping door panel than an entire door of scrapping. (Apart from color, door state and blah blah blah and the price is not the same)
it breaks the inner panel if necessary, but what you have to do it from within, that once there is no panel, children's insurance and the mechanics of the handle are accessible from the inside.
Greetings and go putada !!