How do you change the left directional on your mirror on a 2000 s500?

To change the left directional signal on a 2000 S500, first, open the driver's side door and locate the mirror assembly. Remove the mirror cover by gently prying it off, then you will find the bulb socket behind it. Twist the socket counterclockwise to remove it, replace the bulb with a new one, and reassemble the mirror cover. Finally, test the directional signal to ensure it's functioning correctly.