1. Open up the door of your Audi 100 CS which you will be removing the trim from.
2. Slide the trim stick in to the door frame. Pry the trim away from the door frame with the stick. Once it comes loose from the door, pull it completely away with your hands.
3. Use a Phillips screwdriver to remove the screws which are attached to the door handle trim. Pull the trim away from the door.
4. Remove the mounting screws which fix the trim around the inside of the door panel and around the automatic window control. Pull them both from the door to complete the work.
5. Place the new door panel trim on to the door panel with your hands. Secure it on the connectors around the door and fix in place with screws using a screwdriver.
6. Place the door handle trim carefully around the edges of the door handle. Attach the screws to fix it firmly in place.
7. Carefully fix the trim around the outer door frame. Hook the trim around the connectors to secure it in place. Take care not to damage the window in any way. Press around the edges of the window with your hand to ensure it is fixed securely to the door.