Fit a new wing mirror on mk4 golf?

To fit a new wing mirror on a Mk4 Golf, start by removing the interior door panel to access the mirror wiring and mounting screws. Disconnect the electrical connector if it's powered, then unscrew the old mirror from the outside. Attach the new wing mirror by aligning it with the mounting points, securing it with screws, and reconnecting the electrical connector if applicable. Finally, reattach the door panel and ensure the mirror is properly adjusted.