Cadillac 2004 SRX - Manual (Page 103)

Mirror Operation
The automatic dimming feature is active each time the
vehicle is started.
To turn the automatic dimming feature on or off, press
and release the on/off button. The indicator light will
illuminate when this feature is active.
Compass Operation
Press the on/off button once to turn the compass on
or off.
When the ignition and the compass feature are on, the
compass will show two character boxes for
approximately two seconds. After two seconds, the
mirror will display the current compass heading.
Compass Calibration
If after two seconds the display does not show a
compass heading (N for North for example), there may
be a strong magnetic field interfering with the
compass. Such interference may be caused by a
magnetic antenna mount, note pad holder or similar
object. If the letter C should ever appear in the compass
window, the compass may need calibration.
The mirror can be calibrated by driving the vehicle in
circles at 5 mph (8 km/h) or less until the display reads a
direction.
The compass can be placed in calibration mode by
pressing and holding the on/off button until a C is shown
in the compass display.
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