Ford Grand Marquis Owner's Manual page 130

The lap belts should fit snugly and as low
as possible around the hips, not around
the waist.
Front and rear seat occupants, including
pregnant women, should wear safety belts
for optimum protection in an accident.
Each seating position in your vehicle has a
specific safety belt assembly which is
made up of one buckle and one tongue
that are designed to be used as a pair. 1)
Use the shoulder belt on the outside
shoulder only. Never wear the shoulder
belt under the arm. 2) Never swing it
around your neck over the inside
shoulder. 3) Never use a single belt for
more than one person.
To unfasten all the belts:
1. Push the release button in the center of the
buckle. This allows the tongue to unlatch
from the buckle.
Unfastening the outboard lap/shoulder belts
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