2015 Ford Expedition EL Owner Manual Printing 1 - Page 237

236 Driving Aids for you to steer. This occurs to prevent internal overheating and permanent damage to your steering system. If this should occur, you will neither lose the ability to steer the vehicle manually nor will it cause permanent damage. Typical steering and driving maneuvers will allow the system to cool and steering assist will return to normal. When a steering system error is detected, steering messages may appear in the information display. Steering Tips If the steering wanders or pulls, check for: • an improperly inflated tire • uneven tire wear • loose or worn suspension components • loose or worn steering components • improper vehicle alignment A high crown in the road or high crosswinds may also make the steering seem to wander/pull. AUTO LEVELING SUSPENSION SYSTEM (if equipped) The automatic leveling suspension system is designed to improve ride, handling and general vehicle performance during: • Certain road conditions • Steering maneuvers • Braking • Acceleration • Towing This system keeps the rear of your vehicle at a constant level through a hydraulic pump inside each rear shock. Depending on the payload or road surface conditions it will take approximately 2 miles (3.2 km) for the leveling to complete. If the loaded vehicle is not moved for approximately 12 hours, the leveling system may bleed down to a lower height. This can be especially apparent if a trailer is left attached to the parked vehicle for long periods of time. You must drive your vehicle in order to re-level the suspension. If a self-equalizing hitch is being used, your vehicle should be drive approximately 2 miles (3.2 km) with the trailer prior to adjusting (leveling) the hitch.