Damage

Periodically inspect the tire treads and sidewalls for damage (such as bulges in the tread or sidewalls, cracks in the tread groove and separation in the tread or sidewall). If damage is observed or suspected have the tire inspected by a tire professional. Tires can be damaged during off-road use, so inspection after off-road use is also recommended.
WARNING: Age
Tires degrade over time depending on many factors such as
weather, storage conditions, and conditions of use (load, speed,
inflation pressure, etc.) the tires experience throughout their lives.
In general, tires should be replaced after six years regardless of tread wear. However, heat caused by hot climates or frequent high loading conditions can accelerate the aging process and may require tires to be replaced more frequently.
You should replace your spare tire when you replace the road tires or after six years due to aging even if it has not been used.
See also:
Check MyKey system status
The vehicle system check will provide the status of the following MyKey
parameters:
• MYKEY MILES — This odometer only tracks mileage when a MyKey
is used. If mileage does not accumulate as e ...
Driving on hilly or sloping terrain
Although natural obstacles may make it necessary to travel diagonally up
or down a hill or steep incline, you should always try to drive straight up
or straight down. Note: Avoid driving crosswise ...
Interior
Depending on the second-row seating configuration, the Navigator carries
either seven or eight occupants and includes a standard, 60/40-split third-row
seat. Lincoln claims it is the only manufact ...
