Ford 2009 Mariner Owner's Manual page 471

Seating and Safety Restraints
WARNING: Do not sit on top of a buckled safety belt or insert a
latchplate into the buckle to avoid the Belt-Minder chime. To
do so may adversely affect the performance of the vehicle's air bag
system.
One-time disable
If at any time the driver/front passenger quickly buckles then unbuckles
the safety belt for that seating position, the Belt-Minder is disabled for
the current ignition cycle. The Belt-Minder feature will enable during
the same ignition cycle if the occupant buckles and remains buckled for
approximately 30 seconds. Confirmation is not given for the one time
disable.
Deactivating/activating the Belt-Minder feature
The driver and front passenger Belt-Minder are
deactivated/activated independently. When deactivating/activating
one seating position, do not buckle the other position as this will
terminate the process.
Read Steps 1 - 4 thoroughly before proceeding with the
deactivation/activation programming procedure.
The driver and front passenger Belt-Minder features can be
deactivated/activated by performing the following procedure:
Before following the procedure, make sure that:
• The parking brake is set
• The gearshift is in P (Park)
• The ignition switch is in the off position
• The driver and front passenger safety belts are unbuckled
WARNING: While the design allows you to deactivate your
Belt-Minder , this system is designed to improve your chances of
being safely belted and surviving an accident. We recommend you
leave the Belt-Minder system activated for yourself and others who
may use the vehicle. To reduce the risk of injury, do not
deactivate/activate the Belt-Minder feature.
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2009 Mariner (mrn)
Owners Guide, 2nd Printing
USA (fus)