2010 Ford Expedition EL Owner Guide 1st Printing (Spanish) - Page 773

Driving If the power steering system breaks down (or if the engine is turned off), you can steer the vehicle manually, but it takes more effort. If the steering wanders or pulls, check for: • Underinflated tire(s) on any wheel(s) • Uneven vehicle loading • High crown in center of road • High crosswinds • Wheels out of alignment • Loose or worn suspension components Variable assist steering Your vehicle is equipped with variable assist power steering. At low engine RPM, steering assist will adjust to reduce efforts and improve low speed maneuverability. At high engine RPM, the assist will adjust to improve steering feel at high speeds. If the amount of effort required to steer your vehicle changes while driving at a constant engine RPM, have the power steering system checked by your authorized dealer. AIR SUSPENSION SYSTEM (IF EQUIPPED) The air suspension system is designed to improve ride, handling and general vehicle performance during: • Certain road conditions • Steering maneuvers • Braking • Acceleration This system keeps the rear of your vehicle at a constant level by automatically adding air or releasing air from the springs. If you exceed the load limit, the rear air suspension may not operate. 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 system can be enabled or disabled through the message center. Refer to Message center in the Instrument cluster chapter. 299 2010 Expedition (exd) Owners Guide (own2002), 1st Printing USA (fus)