Tire wear

When the tread is worn down to 1/16th of an inch (2 mm), tires must be replaced to help prevent your vehicle from skidding and hydroplaning. Built-in treadwear indicators, or “wear bars”, which look like narrow strips of smooth rubber across the tread will appear on the tire when the tread is worn down to 1/16th of an inch (2 mm).
When the tire tread wears down to the same height as these “wear bars”, the tire is worn out and must be replaced.

See also:
All-wheel drive (AWD) system (if equipped)
Your vehicle may be equipped with a full-time all-wheel drive (AWD)
system. With the AWD option, power will be delivered to the front
wheels and distributed to the rear wheels as needed. This incr ...
Overview
The Lincoln Navigator serves as Lincoln's full-sized luxury SUV. The
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Recommendations for attaching child safety restraints for children
WARNING: Airbags can kill or injure a child in a child seat.
NEVER place a rear-facing child seat in front of an active airbag.
If you must use a forward-facing child seat in the front seat, move ...
