FORD 2003 Mustang v.4 - Manual (Page 86)

Both can be used in any vehicle in a seating position
equipped with lap/shoulder belts if your child is over
40 lbs.
The shoulder belt should cross the chest, resting
snugly on the center of the shoulder. The lap belt
should rest low and snug across the hips, never up
high across the stomach.
If the booster seat slides on the vehicle seat, placing
a rubberized mesh sold as shelf or carpet liner under
the booster seat may improve this condition.
The importance of shoulder belts
Using a booster without a shoulder belt increases
the risk of a child’s head hitting a hard surface in a
collision. For this reason, you should never use a
booster seat with a lap belt only. It is best to use a
booster seat with lap/shoulder belts in the back seat-
the safest place for children to ride.
Follow all instructions provided by the
manufacturer of the booster seat.
Never put the shoulder belt under a child’s
arm or behind the back because it
eliminates the protection for the upper part of the
body and may increase the risk of injury or death
in a collision.
Never use pillows, books, or towels to boost
a child. They can slide around and increase
the likelihood of injury or death in a collision.
Seating and Safety Restraints
86