how to take the door panel off?

Hi somphou, Around the door panel are retainer clips. These hold the door panel to the door frame. To remove the door panel simply slide a door panel removal tool (or flat screwdriver) in between the frame and the panel. When a retainer clip is encountered simply pry the retainer from the frame. Do this for each of the retainer clips. You may also encounter an arm rest screw that fixes the arm rest to the door frame. Simply remove these screws and the door panel should come right off. Make sure not to yank the door panel away from the door frame as there may be wiring (for power options) that need to be disconnected. Good luck!