Lincoln 2004 Town Car Owner's Manual page 199

Driving
The extended rear park aid is
automatically enabled when the gear
selector is placed in R (Reverse)
and the ignition is ON. A park aid
control allows the driver to disable
the extended rear park aid only
when the ignition is ON, and the
gear selector is in R (Reverse).
The OFF indicator remains
illuminated when the system is
disabled. The system defaults to ON
every time the ignition is turned on. Press the control to disable or
enable the system.
The indicator will remain illuminated to indicate a failure of the extended
rear park aid.
Always keep the sensors (located on the rear bumper/fascia) free
from snow, ice and large accumulations of dirt (do not clean the
sensors with sharp objects). These elements may cause the
system to operate inaccurately.
If the vehicle sustains damage to the rear bumper/fascia, leaving
it misaligned or bent, the sensing zone may be altered causing
inaccurate measurement of obstacles or false alarms.
DRIVING THROUGH WATER
If driving through deep or standing water is unavoidable, proceed very
slowly especially when the depth is not known. Never drive through
water that is higher than the bottom of the hubs (for trucks) or the
bottom of the wheel rims (for cars). When driving through water,
traction or brake capability may be limited. Also, water may enter your
engine's air intake and severely damage your engine or your vehicle may
stall. Driving through deep water where the transmission vent
tube is submerged may allow water into the transmission and
cause internal transmission damage.
Once through the water, always dry the brakes by moving your
vehicle slowly while applying light pressure on the brake pedal.
Wet brakes do not stop the vehicle as quickly as dry brakes.
198
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2004 Town Car (tow), Owners Guide (post-2002-fmt) (own2002),
Market: USA_English (fus)