How do you replace a N.S door mirror on a Citroen relay Van?

To replace the N.S. door mirror on a Citroën Relay van, start by ensuring the vehicle is parked safely and the ignition is off. Remove the door panel if necessary to access the mirror's wiring and mounting screws. Disconnect the electrical connector, unscrew the mirror from the door, and then attach the new mirror by reversing the process. Finally, reconnect the wiring and reattach the door panel, ensuring everything is secure before testing the mirror's function.