(2) Switch 
(3) Sensor for recognizing entry of light 
The auto-dimming feature can be switched on and off with the switch 
on the inside mirror (2) A or   (2) B. When auto-dimming is activated, 
the indicator light (1) is on. 
If the ignition is switched on, the sensor (3) automatically darkens the 
inside mirror depending on the amount of light shining into the vehicle 
from the rear. 
The auto-dimming feature is deactivated when you shift the transmis-
sion into reverse or switch on the interior lights or the reading light. 
Do not attach external navigation devices to the windshield or in the 
vicinity of the auto-dimming inside mirror ⇒ . 
  WARNING 
The illuminated display on an external navigation device can 
cause the auto-dimming inside mirror to malfunction, which 
can result in crashes and serious injuries. 
  Malfunctions in the auto-dimming function can result in the 
inside mirror being unable to evaluate the exact distance of ve-
hicles in the rear or other objects. 
  If the light striking the sensor is filtered or blocked (such as by a 
sunshade), the auto-dimming inside mirror will not work properly or 
may not work at all.