Lincoln 2005 Navigator Owner's Manual page 309

The AdvanceTrac with RSC stability enhancement system can be
turned off manually by pressing the AdvanceTrac
(refer to AdvanceTrac
Enhancement System in this chapter) while operating in 2H, A4WD or
4H while driving in deep sand, very deep snow or more strenuous
off-road maneuvers. This will disable the engine management feature,
allowing the vehicle to maintain full power and enhanced momentum
through the obstacle.
Utility and four-wheel drive vehicles are not designed for
cornering at speeds as high as passenger cars any more than
low-slung sports cars are designed to perform satisfactorily under
off-road conditions. Avoid sharp turns or abrupt maneuvers in these
vehicles.
Note: The Control Trac selector knob should not be changed while the
rear wheels are slipping.
Using the Control Trac system
Vehicles equipped with a message center will provide an audible tone
and a temporary display of the Control Trac Four-Wheel Drive System
mode after a mode change has been successfully completed.
Shifting from 2H to A4WD or 4H
Move the control to the A4WD or
4H position at any forward speed up
to 55 mph (88 km/h). The "4X4"
light in the instrument cluster will
illuminate if 4H is selected.
REVIEW COPY
2005 Navigator (nav), Owners Guide (post-2002-fmt) (own2002),
Market: USA_English (fus)
with Roll Stability Control (RSC) Stability
Driving
with RSC button
309