wheel size Mercury Mountaineer 1997 Owner's Manuals

Page 73 of 197

AIR BAG DESCRIPTION
The air bag system activates in
collisions more severe than hitting
a parked vehicle of similar size and
weight head-on at about 45km/h
(28 mph).
The air bag system consists of two
parts:
²The driver air bag in the middle
of the steering wheel and the
passenger air bag near the glove
compartment.
²The electrical system, made up
of impact sensors, a diagnostic
module, and a backup power
supply.
The diagnostic module monitors its
own internal circuits and the
supplemental air bag electrical
system readiness (including the
impact sensors), the system wiring,
the air bag system readiness light,
the air bag back up power, and the
air bag ignitors.
The air bags inflate within a
fraction of a second after air bag
sensors detect a severe frontal
collision. Gas generators within the
air bags fill the air bags with a
non-toxic, non-flammable gas.
After the vehicle occupants have
contacted the air bags, the gas
empties through holes in the air
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120
140
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180
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Seating and safety restraints
73

Page 163 of 197

Failure to follow these
precautions may adversely
affect the handling of the vehicle
and make it easier to lose control
and roll over.
IDENTIFYING TIRE TYPES
Refer to the Safety Compliance
Certification Label to determine
the specific size tire and wheel
Ford Motor Company recommends
for use on this vehicle.
All wheel/tire combinations
(including spare) must be the
same size for AWD equipped
vehicles.
SNOW TIRES AND CHAINS
Snow tires must be the
same size and grade as the
tires you currently have on your
vehicle.
The tires on your vehicle have all
weather treads to provide traction
in rain and snow. However in some
climates, you may need to use
snow tires and chains. Follow
these guidelines when using snow
tires and chains:
²Use only SAE Class ªSº chains.
²Install chains securely, verifying
that the chains do not touch any
wiring, brake lines or fuel lines.
²Install tire chains on rear tires
only.
Maintenance and care
163