diono monterey xt high back booster manual

The Diono Monterey XT High Back Booster is a premium child safety seat designed for children 5-12 years old, 40-120 lbs, and up to 63 inches tall. Features include 3-position adjustable headrest, 11-position adjustable armrests, reinforced steel frame, side impact protection, machine washable cover, and LATCH compatibility. Below are key sections for safety, features, installation, setup, operation, and troubleshooting.

1. Features at a Glance 2. Installation 3. First-Time Setup 4. Specifications 5. Controls and Adjustments 6. Proper Positioning 7. Cleaning and Maintenance 8. Safety Features 9. Regulatory Information 10. Troubleshooting

Features at a Glance

Key components: Reinforced steel frame, adjustable headrest, adjustable armrests, side impact protection, LATCH connectors, machine washable cover.

Feature	Description
Adjustable Headrest	3-position height adjustment for growing children
Adjustable Armrests	11-position width adjustment for comfort
Reinforced Steel Frame	Enhanced safety and durability
Side Impact Protection	Energy-absorbing foam for lateral protection
LATCH Connectors	Easy vehicle installation system
Machine Washable Cover	Removable and washable fabric cover
Seat Belt Guide	Proper positioning of vehicle seat belt
Cup Holder	Integrated drink holder
Reclining Feature	Multiple recline positions for comfort
Storage Compartment	Under-seat storage space

Installation

Unpack and inspect contents. Ensure all parts are present and undamaged.

Place booster in vehicle seat: Position in rear-facing vehicle seat.
Connect LATCH system: Attach LATCH connectors to vehicle anchors.
Tighten LATCH straps: Pull straps until booster is secure with minimal movement.
Position child: Place child in booster and adjust headrest/armrests.
Route seat belt: Thread vehicle seat belt through belt guide.

WARNING! Always install in vehicle's rear seat. Ensure booster is securely fastened with less than 1 inch of movement.

First-Time Setup

Before first use, complete initial setup and adjustments.

Adjust headrest height: Lift headrest to appropriate height for child's shoulders.
Set armrest width: Adjust armrests to comfortable position.
Configure recline angle: Set desired recline position for comfort.
Install LATCH system: Connect to vehicle anchors and tighten.
Test installation: Ensure booster moves less than 1 inch side-to-side.

CAUTION! Always use vehicle seat belt in addition to LATCH system. Never leave child unattended.

Specifications

Age Range: 5-12 years
Weight Capacity: 40-120 lbs
Height Limit: Up to 63 inches
Headrest Positions: 3 adjustable positions
Armrest Positions: 11 adjustable widths
Recline Positions: Multiple angle settings
Frame Material: Reinforced steel with energy-absorbing foam
Cover Material: Machine washable fabric
Certifications: FMVSS 213 compliant
Warranty: Limited 10-year warranty

Controls and Adjustments

Access adjustment features via headrest lever, armrest buttons, and recline mechanism.

Headrest Adjustment: Pull lever behind headrest to adjust height. Ensure ears are below top of headrest.

Armrest Adjustment: Press release buttons on armrest sides to adjust width. Position for child comfort.

Recline Adjustment: Use recline lever at base to set comfortable angle.

LATCH Adjustment: Pull LATCH straps to tighten; press release button to loosen.

Proper Positioning

Correct positioning ensures maximum safety and comfort.

Head position: Top of ears should be below headrest top.
Shoulder position: Shoulder belt should cross chest and shoulder.
Lap position: Lap belt should rest low on hips, touching thighs.
Leg position: Knees should bend comfortably at seat edge.
Arm position: Arms should rest comfortably on armrests.

Tip: Regularly check fit as child grows. Adjust headrest and armrests accordingly.

Cleaning and Maintenance

Supports regular cleaning to maintain hygiene and appearance.

Remove cover: Unhook cover from booster frame.
Machine wash: Use cold water, gentle cycle, mild detergent.
Air dry: Hang to dry; do not machine dry.
Clean frame: Wipe with damp cloth and mild soap.
Reinstall cover: Ensure proper alignment and secure attachment.

WARNING! Do not use bleach or harsh chemicals. Never submerge booster in water.

Safety Features

Side Impact Protection: Energy-absorbing foam reduces impact forces. Reinforced Steel Frame: Provides structural integrity. LATCH System: Secure attachment to vehicle. Seat Belt Guide: Ensures proper belt positioning.

Regulatory Information

FMVSS 213 Compliant: Meets all federal safety standards. Copyright © 2025 Diono; all rights reserved. For support, visit www.diono.com or contact 1-855-463-4666. This product is covered by limited 10-year warranty from date of purchase.

Troubleshooting

Symptom	Possible Cause	Corrective Action
Booster moves excessively	Loose LATCH/seat belt	Tighten LATCH straps; ensure seat belt is properly routed.
Child uncomfortable	Improper adjustments	Adjust headrest height, armrest width, and recline angle.
Seat belt improper position	Incorrect belt routing	Ensure belt passes through designated guide slots.
Difficult to adjust	Debris in mechanisms	Clean adjustment tracks; check for obstructions.
Cover won't stay secure	Improper installation	Reinstall cover ensuring all hooks are properly engaged.

Inspection: Regularly check for wear, damage, or loose components.

Service: 1-855-463-4666; www.diono.com