Auto-dim
If bright light enters the vehicle from behind, the door mirrors will automatically dim. Auto-dim is always active when the engine is running, except when reverse gear is engaged.
Note
The sensitivity level for dimming will affect both the rearview mirror and door mirrors.
To change the dimming sensitivity level:
The rearview mirror instead has two sensors - one pointing forward and one pointing rearward - which work together to identify and eliminate glare. The forward-pointing sensor monitors ambient light, while the rearward-pointing sensor monitors light from the headlights of following vehicles.
For the door mirrors to be equipped with auto-dim, the rearview mirror must also be equipped with auto-dim.