BMW E36 door panel repair DIY, in this video I repair my brothers BMW door panel that has fallen into disrepair. 
This is a common problem with e36's. The vinyl typically separates from the door panel and bubbles up, and the plastic support pieces break apart. 
I do not go the extra mile and repair the vinyl, as this requires a heat gun, and a special adhesive. I simply pull the panel off, glue back down the plastic brackets, and then replace the clips that hold the door panel to the frame.
BMW e36 door panel repair is a relatively quick and simple process. Unfortunately if your door panel plastic pieces are completely broken you will have to order new ones.