Lexus 2004 GX470 Owner's Manual page 223

STEERING WHEEL AND MIRRORS
When the outside air temperature is low, it may take a little
longer for the mirror to darken in response to the detection of
headlights.
CAUTION
Do not adjust the mirror while the vehicle is moving.
Doing so may cause the driver to mishandle the vehicle
and an accident may occur resulting in death or serious
injuries.
To ensure correct functioning of an anti-glare mirror
sensor located on the back side of the mirror, do not touch
or cover the sensor with your finger or a piece of cloth, etc.
208
Compass
The compass indicates the direction in which the vehicle
is heading. The illustration shown above indicates the
vehicle is heading north.
Push the "COMP" switch to turn the compass system on
and off.
If the ignition switch was turned off with the system on, the
system will automatically turn back on when the ignition switch
is turned on.