2003 Lincoln Navigator Owner Guide 1st Printing (Spanish) - Page 617

Driving When the vehicle is in motion, the air suspension will adjust the vehicle ride height to normal operating position to maximize your ride comfort. If your vehicle is equipped with four-wheel drive and you shift into 4WD LOW, the air suspension will not move to it's lowest position; instead, the ride height is raised above the normal ride height position (at speeds below 40 km/h [25 mph]) to improve ground clearance. If a load is added to, or removed from the vehicle, the load leveling feature of the air suspension system will adjust the suspension to keep the vehicle at a constant level. When exiting the vehicle, the air suspension will automatically lower the vehicle to its lowest height to provide easier exit. You may hear a buzz or click from the air suspension system when the ignition is turned off. The air suspension system will stay active for 40 minutes after the ignition is turned off to accommodate any load changes. (The air compressor may run when the vehicle is off; this is normal.) The air suspension shut-off switch is located behind two access panels on the left rear quarter trim panel, near the liftgate. To remove the first panel, turn the control counterclockwise and remove the panel. On vehicles equipped with air suspension, turn the air suspension and the ignition switch off prior to jacking, hoisting or towing your vehicle. 226