Diono 15600 Monterey XT-Latch Booster Seat

Introducing Designed to grow with your child, the Diono 15600 Monterey XT-Latch Booster Seat is a highly adjustable and adaptable car seat. Its 2-in-1 design makes it possible to use it as a backless booster in addition to a high-back booster. For easier installation and increased safety, the seat has LATCH connectors. It has extra-deep seat and backrest for additional comfort, adjustable headrest and side wings, and excellent side impact protection. Suitable for children weighing 40-120 lbs, the Monterey XT-Latch ensures your child's safety and comfort on every journey.

PARTS

• Head Support 
• Head Support Adjuster 
• Upper Belt Guide 
• Lower Belt Guide 
• LATCH Connectors 
• LATCH Adjuster Straps 
• Cup Holder 
• Backrest Width Adjuster 
• Instruction Manual Storage Pocket

Detailed Specifications

The Diono 15600 Monterey XT-Latch Booster Seat boasts several key features that make it a top choice for parents. These include:

• Deep aluminum reinforced sidewalls
• Energy-absorbing EPS foam
• Reinforced steel frame
• Latch installation system
• 8 position headrest
• Expandable sides and long seat bottom
• Machine washable cover
• Folds flat for easy storage
• Rear-facing tether capability
• Approved for use in aircraft

Description

The Diono 15600 Monterey XT-Latch Booster Seat is designed to provide a comfortable and safe ride for your child, while also making it easy for parents to install and use. The booster seat is suitable for children weighing between 40-120 lbs and up to 63" tall. The aluminum-reinforced sidewalls and energy-absorbing EPS foam provide maximum side impact protection, while the reinforced steel frame ensures that the booster seat can withstand the forces of a crash. The Latch installation system makes it easy to install the booster seat in your vehicle, and the 8-position headrest and expandable sides ensure that your child is comfortable and properly positioned. The long seat bottom and rear-facing tether capability provide additional safety features. The cover is machine washable and the booster seat folds flat for easy storage.

SEAT ASSEMBLY

ATTACHING THE BACKREST

1. With seat lying flat on the floor, tuck in fabric panel at rear of seat. Place hooks at seat bottom as shown. 
2. Attach the backrest hooks to seat mounting points. 
3. Push down on seatback just above hooks until fully engaged. 

4. Rotate seatback to an upright position while maintaining pressure just above the hooks. Finish by tucking any excess fabric up and under the fabric of the backrest.

   

INSTALLATION

WARNING! Unsecured objects can become flying hazards and can cause serious injury in an accident. If your vehicle is equipped with lower anchors, Diono always recommends installation utilizing the LATCH connectors with this booster seat. 

To improve safety and performance, this booster seat is equipped with a lower anchorage system that allows secure attachment to a vehicle’s lower anchor locations.

1. Disengage LATCH connectors from storage slots and lay booster seat on its side. While depressing the cam lock lever, pull LATCH connectors away from the booster seat and extend both straps all the way. Do not overextend connector straps. 
2. Attach both LATCH connectors to the vehicle anchors, starting with the connector that is furthest from you. For ease of use, make sure open end of hooks face upward during use. 

3. While pushing booster against vehicle seat, pull one adjuster strap tight and then the other. Make sure that both LATCH connectors are securely attached to the vehicle's lower anchors. 

   

NOTE: Even with LATCH connectors properly attached and adjusted, child seat will still have movement against the vehicle seat back and bottom 

IMPORTANT: Do not use LATCH if installation interferes with vehicle seat belt. 

IMPORTANT: When using booster seat in center seating position, make sure it is stable and does not rock from side to side.

ADJUSTING THE RECLINE ANGLE 

This booster seat features a recline angle that can be adjusted to match that of the vehicle seat:

• Push booster seat backrest backwards until you hear a click. Backrest will now pivot freely and does not need to click into another position. 

• Push seat bottom and backrest of booster seat down and back into vehicle seat until there is secure positioning with the booster seat and vehicle seat bottom and vehicle seat back. A gap is acceptable as long as the head support is touching the vehicle seat back or head rest. 

  

IMPORTANT: It may also be necessary to adjust the recline angle of the booster seat to match that of the vehicle seat.

LOWER ANCHOR REMOVAL & HEAD SUPPORT

DISENGAGING LOWER ANCHOR INSTALLATION 
Follow the previous instructions in reverse order.

1. Reach under the bottom of the booster seat and depress the cam lock lever while pulling the seat away from the vehicle seat back until the lower anchor straps are extended all the way. 
2. Disconnect LATCH connectors from vehicle anchors. 
3. Pull lower anchor adjuster straps to recess the LATCH connectors into the back of the booster seat bottom for safe storage. 

IMPORTANT: Do not use LATCH if installation interferes with vehicle seat belt.

ADJUSTING THE HEAD SUPPORT 
The head support height can be adjusted for best fit to your child and to ensure proper placement of the Vehicle Shoulder Belt. Squeeze the head support adjustment lever on the back of the booster seat while adjusting its height up or down to fit the child.

SECURING THE CHILD

WARNING! Use ONLY the lap and shoulder belt system when restraining the child in this booster seat. DO NOT use lap belt only.

1. Place booster seat on vehicle seat so it is resting firmly on vehicle seat bottom and touching the vehicle seat back. A gap is acceptable as long as the head support is touching the vehicle seat back or head rest. 
2. Properly position child: sitting upright and seated all the way back in the booster seat. 
3. Adjust head support to proper height: The RED shoulder belt guide should be slightly above the child’s shoulders (at least 1 cm). Squeeze the head support adjustment lever on the back of the booster seat while adjusting its height up or down to fit the child. 

4. Feed the vehicle diagonal shoulder belt portion of the seat belt through the RED shoulder belt guide into the side of the seat opposite the seat belt buckle. 

   

5. Fasten vehicle seat belt across child. The lap portion of the seat belt should rest within both lower belt guides. The diagonal shoulder belt portion should route inside the lower belt guide closest to the buckle and over child’s shoulder. 
6. Make sure the vehicle seat belt is not twisted and lays flat across child’s lap, torso and shoulder. 

7. Tighten the seat belt by pulling the diagonal shoulder belt portion in the direction of the arrows. 

   

8. Confirm seat belt buckle is in correct position. 

IMPORTANT: The Vehicle Shoulder Belt MUST route completely through the RED shoulder belt guide and not fall off the child’s shoulder. 

IMPORTANT: DO NOT position the Vehicle Lap Belt over the armrest. It MUST pass under the armrest. 

IMPORTANT: When using the diagonal portion of the seat belt, it should lay over the shoulder and should NOT be touching the child’s neck.

PROPER BUCKLE POSITION 
IMPORTANT: After booster seat is installed and seat belt is fastened around the child, it is important to confirm correct seat belt buckle position to ensure secure installation.

• Buckle is on the outside of lower belt guide.
• If buckle is being pulled across the lower belt guide and into the seat, choose another seating position within the vehicle.

BACKLESS BOOSTER SEAT

While this booster seat is designed to offer advanced side-impact protection with its backrest section attached, the seat bottom can also be used alone as a backless booster.

1. Remove the seat back by reversing the steps shown in “Seat Assembly.” 
2. Make sure both LATCH connectors are securely attached to the vehicle's lower anchors (see “Lower Anchor Installation”). While pushing booster against vehicle seat, pull the adjuster straps tight. 
3. Place booster seat on vehicle seat so it is resting firmly on vehicle seat bottom and touching the vehicle seat back. The entire seat bottom should sit flat on the vehicle seat. 
4. Properly position child: sitting upright and all the way back in the booster seat. 
5. Fasten seat belt across child.
6. Make sure seat belt is not twisted and lays flat across child’s hips, torso, and shoulder. 

7. Tighten the seat belt by pulling the diagonal shoulder belt portion in the direction of the arrows. 

   

NEVER position the shoulder belt loosely or under the child’s arm or behind their back.

USING THE SHOULDER BELT GUIDE STRAP

1. Remove shoulder belt guide strap from storage area underneath the seat. 
2. Position child correctly in seat as per the prior instructions in the manual, making sure lap and shoulder belts are positioned properly across child. 
3. Attach the red shoulder belt guide strap onto the diagonal shoulder belt. 

4. Adjust strap to correct length, so that the red guide is just above the shoulder. 

   

WARNING! If the diagonal seat belt portion does not correctly fit the child, then the seat must be used with the shoulder belt guide strap or with the seatback portion attached and properly adjusted to fit the child.

CUP HOLDERS

1. Cup holders are located on both sides of the seat bottom. 
2. Swivel outward to the locked position for use. 

3. Swivel inward to the recessed and locked position when not in use.

   

CAUTION: DO NOT use with hot liquids as this could burn a child. 

IMPORTANT: Do not step on or put excess weight on the cup holder which could cause it to break.

Setup Guide

1. Place the booster seat in the back seat of your vehicle and use the Latch connectors to attach the booster seat to the lower anchors in your vehicle.
2. Adjust the headrest to the correct position for your child's height. The top of the headrest should be above your child's ears.
3. Ensure that the harness straps are at the correct height. The harness straps should be at or above your child's shoulders.
4. Buckle the harness and tighten it so that it is snug against your child's body. You should not be able to pinch any slack in the harness.
5. Adjust the expandable sides so that they are snug against your child's body.
6. Tuck in any loose straps and ensure that the booster seat is securely installed.

CARE & MAINTENANCE

REMOVING THE COVER

1. Separate seat back section from seat bottom section. 
2. Remove plastic fasteners and elastics that secure fabric cover to seat bottom, seat back, and headrest. 
3. Remove fabric cover pieces from the booster seat sections. 

DO NOT use solvents, detergents or any other chemical or cleaning agent. DO NOT lubricate any part of the seat.

SAFE USE GUIDE

WARNING
Carefully read and understand all instructions and warnings in this manual, and those labeled on your Child Restraint. Failure to do so can result in the SERIOUS INJURY or DEATH of your child.

SAFE USE REQUIREMENTS
This child restraint is designed for use ONLY with children who weigh 40–120 lb (18–54 kg) AND whose height is 38–63 in. (97–160 cm). Use ONLY the vehicle lap and shoulder belt system when restraining the child in this booster seat. DO NOT use a lap belt only! Use ONLY with children whose ears are below the top of either the fully raised booster seat head support or the fully raised vehicle headrest.

CERTIFICATIONS
This child restraint system conforms to all applicable Federal Motor Vehicle Safety Standards (FMVSS 213). This child restraint is certified for use in passenger cars, multi-purpose passenger vehicles, and trucks ONLY. THIS RESTRAINT IS NOT CERTIFIED FOR USE IN AIRCRAFT. Aircraft seats do not have shoulder belts which are required for use with this booster seat.

WARNING! DO NOT PLACE A CHILD RESTRAINT IN THE FRONT SEAT OF A VEHICLE WITH A PASSENGER AIR BAG. DEATH OR SERIOUS INJURY MAY OCCUR. If an air bag inflates, it can hit the child or child restraint with enough force to cause serious injury or death to your child. The back seat is the safest place for children 12 and under. Refer to your vehicle owner’s manual for information on your child restraint installation. 

According to accident statistics, children are safer when properly restrained in the rear seating positions than in the front seating positions.

WARNING! DEATH or SERIOUS INJURY can occur. 

• Read all instructions before using this child restraint. Keep instructions stored underneath the seat cover for future use. 
• Before installing this child restraint in a vehicle, be sure to also check the vehicle owner’s manual for information on proper installation. 
• DO NOT use this child restraint in any configuration not shown in the instructions. 
• Use ONLY with children who weigh 40–120 lb (18–54 kg) and whose height is 38–63 in. (97–160 cm). 
• Use ONLY the vehicle lap and shoulder belt system when restraining the child in this booster seat. NEVER use with ONLY a vehicle lap belt to restrain a child. This could result in serious injury or death. 
• ALWAYS make sure the vehicle seat belt can properly retract before each use. 
• NEVER leave your child unattended. 
• NEVER install in rear facing, side facing or on the back of a folded down vehicle seat.

EXPIRATION

DO NOT use the child restraint if any part is damaged or broken, expired (over 8 years from date of purchase), missing instructions, missing parts, or if the straps are cut, frayed, or damaged in any way.

SAFE PRACTICES

• DO NOT leave loose objects, such as books, bags, etc., in the back of the vehicle. In the event of a sharp turn, sudden stop, or crash, loose objects can be thrown around and possibly cause serious injury to vehicle occupants. 
• DO NOT use with hot liquids as this could burn a child. 
• ALWAYS check all surfaces of restraint before securing your child. In warm weather, child restraints can become very hot. Do not allow children to play with vehicle seat belts. 
• Some vehicle seat belt systems cannot be used with this booster seat. Read vehicle owner’s manual and “Vehicle Seat Belt Systems” section of this manual.

CAR SEAT USE AFTER A COLLISION

The U.S. National Highway Traffic Safety Administration (NHTSA) recommends that car seats be replaced following a MODERATE OR SEVERE COLLISION in order to ensure a continued high level of collision protection for child passengers. Car seats do not automatically need to be replaced following a MINOR collision. NHTSA defines a MINOR collision as ALL of the following:

• The vehicle was able to be driven away from the collision site; AND 
• The vehicle door nearest the car seat was not damaged; AND 
• No vehicle occupants were injured; AND 
• There is no visible damage to the car seat; AND 
• The airbags (if present) did not deploy.

NEVER use a car seat that has been involved in a MODERATE OR SEVERE COLLISION.

VEHICLE SEATING LOCATIONS

The safest seating position is one that works best for your specific child restraint, family, and vehicle model. Before installing this child restraint you must determine the method of installation and the best vehicle seating position for that method. When determining whether the child restraint can be used with vehicle LATCH anchors in the rear center seating position, it is critical that you refer to your vehicle owner's instruction book. If the child restraint does not install best in the rear center seating location, it is recommended to move to one of the outboard seating positions.

VEHICLE SEAT BELT SYSTEMS

IMPORTANT: Some vehicle seat belt systems cannot be used with this booster seat.

1. ALWAYS install this booster seat in vehicle seats with 3-point (Lap and Shoulder) belts. 
2. ALWAYS secure this booster seat by attaching the lower anchors in vehicle seats when available when using the 3-point (Lap and Shoulder) belts. 
3. DO NOT install this booster in vehicle seats with a Lap Belt Only. 
4. DO NOT install this booster in vehicle seats with Motorized (Automatic) Vehicle Lap and Shoulder Belts. 

5. DO NOT install this booster in vehicle seats with Door Mounted Vehicle Belts.

   

Troubleshooting

If you are having trouble installing the booster seat, check the following:

• Make sure that the Latch connectors are properly attached to the lower anchors in your vehicle.
• Make sure that the harness is properly adjusted and tightened.
• Make sure that the expandable sides are properly adjusted.
• If you are still having trouble, consult the user manual or contact Diono's customer service.

WARRANTY 

Diono LLC and Diono Ltd and Diono GmbH warrants its products (car seats, strollers, baby carriers, and accessories) to the original retail purchaser as follows: Diono warrants to the original consumer purchaser that this product (car seats, strollers, baby carriers, and accessories) will be free from defects in material and workmanship for one (1) year from the date of original purchase (the “Warranty Period”). During the Warranty Period, Diono will, at its option, repair or replace the product if it is found by the manufacturer to be defective in material or workmanship. Diono reserves the right to discontinue or change: parts, fabrics, models, or products, or to substitute the product with a comparable model or product.

PLEASE COMPLETE THE ONLINE REGISTRATION FORM OR MAIL THE OWNER REGISTRATION CARD WITHIN (30) DAYS OF PURCHASE 

An original receipt from an authorized retailer or diono.com is required to validate your warranty. Shipping charges are the responsibility of the original consumer purchaser. To expedite the processing of any future warranty claims and to verify the original date of purchase, please complete and mail the pre-addressed owner registration card within thirty (30) days of purchase and register your product online, opting into communication from Diono.

EXTENDED WARRANTY ON 2020 MODEL YEAR ONWARDS STROLLERS AND CAR SEATS 

Diono LLC and Diono Ltd warrants ONLY to the original consumer purchaser and only if this product was purchased (new and unused in an unopened box) from diono.com, and who has fully registered their product online at diono.com within two (2) months of purchase, that this product will be free from defects in material and workmanship for an additional two (2) years (the “Extended Warranty Period”) after the standard one (1) year warranty period has expired.

Pros & Cons

Pros

• Deep aluminum reinforced sidewalls and energy-absorbing EPS foam provide excellent side impact protection
• Reinforced steel frame ensures durability and safety
• The latch installation system makes it easy to install
• 8 position headrest and expandable sides for a comfortable fit
• Machine washable cover
• Folds flat for easy storage
• Rear-facing tether capability
• Approved for use in aircraft

Cons

• Higher price point compared to other booster seats
• Heavier than some other booster seats
• Only suitable for children weighing between 40-120 lbs and up to 63" tall