Lincoln 2002 Continental Owner's Manual page 59

Driver Controls
With moon roof:
Press the control to turn the mirror
on or off.
The mirror will automatically return to the normal state whenever the
vehicle is placed in R (reverse)(when the mirror is on) to ensure a
bright clear view when backing up.
Do not clean the housing or glass of any mirror with harsh abrasives, fuel
or other petroleum-based cleaning products.
On vehicles equipped with a moonroof, the automatic rear view mirror
has two map lamps. Refer to Interior lamps for more information.
ELECTRONIC COMPASS (IF EQUIPPED)
The compass reading may be affected when you drive near large
buildings, bridges, power lines and powerful broadcast antennas.
Magnetic or metallic objects placed in, on or near the vehicle may also
affect compass accuracy.
Usually, when something affects the compass readings, the compass will
correct itself after a few days of operating your vehicle in normal
conditions. If the compass still appears to be inaccurate, a manual
calibration may be necessary. Refer to Compass calibration
adjustment.
Most geographic areas (zones) have a magnetic north compass point that
varies slightly from the northerly direction on maps. This variation is four
degrees between adjacent zones and will become noticeable as the
vehicle crosses multiple zones. A correct zone setting will eliminate this
error. Refer to Compass zone adjustment.
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