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Booster seats should be used until you can answer YES to ALL of these
questions:
• Can the child sit all the way back
against the vehicle seat back with
knees bent comfortably at the
edge of the seat without
slouching?
• Does the lap belt rest low across the hips?
• Is the shoulder belt centered on the shoulder and chest?
• Can the child stay seated like this for the whole trip?
Types of booster seats
There are two types of belt-positioning booster seats:
• Those that are backless.
If your backless booster seat has a
removable shield, remove the
shield and use the lap/shoulder
belt. If a seating position has a
low seat back and no head
restraint, a backless booster seat
may place your child’s head (top
of ear level) above the top of the
seat. In this case, move the
backless booster to another
seating position with a higher seat back and lap/shoulder belts.
• Those with a high back.
If, with a backless booster seat,
you cannot find a seating position
that adequately supports your
child’s head, a high back booster
seat would be a better choice.
Either type can be used at any seating position equipped with
lap/shoulder belts if your child is over 40 lb. (18 kg).
2008 Mariner (mrn)
Owners Guide (post-2002-fmt)
USA (fus)
Seating and Safety Restraints
135