Introduction
This manual provides essential information for the safe and correct installation, operation, and maintenance of your Lionelo Harmony i-Size 360° Swivel Car Seat. Please read these instructions carefully before use and keep them for future reference.
The Lionelo Harmony i-Size car seat is designed for children from 40 cm to 150 cm in height, offering comprehensive safety and comfort features.
Safety Information
The Lionelo Harmony i-Size car seat complies with the strict i-Size R129 safety standard.
Key Safety Features:
- Tri-Guard Headrest: Features three layers of memory foam for superior head protection and shock absorption.
- Side Impact Protection (SIP): Additional side protection reduces impact force by up to 20% in a side collision.
- Integrated Belt Alarm: An audible alarm sounds if the child unfastens the harness during travel, alerting the parent.
- ISOFIX and Stabilization Leg Indicators: Visual indicators confirm correct installation of the ISOFIX connectors and stabilization leg.
General Safety Warnings:
- Never leave your child unattended in the car seat.
- Ensure the car seat is always correctly installed and secured according to these instructions.
- Do not use the car seat if it has been involved in an accident, even if there is no visible damage.
- Always secure your child with the harness system, even for short journeys.
- Refer to your vehicle's owner's manual for information on car seat installation in your specific vehicle.
Components
Familiarize yourself with the main components of your Lionelo Harmony i-Size car seat:
- Car Seat Unit
- ISOFIX Connectors (extendable from the base)
- Stabilization Leg (adjustable)
- 5-Point Safety Harness
- Adjustable Headrest
- Dri-Seat Reduction Insert (for smaller children)
- Side Impact Protection (SIP) elements
- 360° Swivel Base

Image: Front view of the Lionelo Harmony i-Size car seat, highlighting the harness and headrest.
Setup and Installation
Proper installation is crucial for your child's safety. Follow these steps carefully.
1. ISOFIX Installation
- Locate the ISOFIX anchor points in your vehicle's back seat.
- Extend the ISOFIX connectors from the car seat base by pressing the release button (usually yellow/green).
- Align the ISOFIX connectors with the vehicle's anchor points and push firmly until they click into place. Check for green indicators to confirm correct attachment.
- Push the car seat firmly against the vehicle's backrest to ensure a tight fit.

Image: Side view of the car seat base showing the extended ISOFIX connectors.
2. Adjusting the Stabilization Leg
- Lower the stabilization leg until it firmly touches the vehicle's floor.
- Ensure the indicator on the stabilization leg shows green, confirming it is correctly positioned and locked.
- The stabilization leg prevents rotation and provides additional stability.

Image: Car seat with the stabilization leg properly extended.
3. Installation Orientation (Child Height)
- Rear-Facing (40-105 cm / up to 18 kg): For infants and toddlers. The car seat must be installed facing the rear of the vehicle.
- Forward-Facing (100-150 cm): For older children. The car seat can be installed facing the front of the vehicle, using the vehicle's 3-point seat belt.
Operating the Car Seat
1. 360° Swivel Function (Easy Turn)
The 360° swivel base allows you to easily rotate the car seat for convenient child placement and removal. To rotate:
- Ensure the car seat is not reclined to its maximum position.
- Locate the swivel release lever (often at the front of the base).
- Press the lever and rotate the seat to the desired position (e.g., facing the car door for loading/unloading).
- Rotate back to the correct driving position (rear-facing or forward-facing) until it locks securely.
The integrated anti-rotation frame ensures smooth rotation and provides more legroom for the child.
Video: Demonstrates the 360° swivel function, ISOFIX installation, side impact protection, and other features of the Lionelo Harmony i-Size car seat.
2. Recline Adjustment
The car seat offers 5 recline levels for optimal comfort, whether rear-facing or forward-facing. To adjust the recline:
- Locate the recline adjustment lever (usually at the front or side of the seat).
- Pull the lever and adjust the seat to one of the 5 desired positions.
- Release the lever and ensure the seat is securely locked in place.
3. Headrest and Harness Adjustment
The headrest can be adjusted to 12 different height positions to accommodate your child's growth. The 5-point harness adjusts automatically with the headrest.
- Locate the headrest adjustment handle (usually at the top rear of the headrest).
- Squeeze the handle and move the headrest up or down to the correct height. The shoulder straps should be at or slightly below your child's shoulders when rear-facing, and at or slightly above when forward-facing.
- Release the handle to lock the headrest in position.

Image: Adjusting the headrest height.
4. Securing Your Child
- Place your child in the car seat.
- Bring the shoulder straps over your child's shoulders and connect the two buckle tongues into the central buckle until they click.
- Pull the harness adjustment strap (located at the front of the seat) to tighten the harness until it is snug against your child's body. You should not be able to pinch any slack in the straps.
- To release the harness, press the red button on the central buckle.
- Use the belt holders on the sides of the seat to keep the harness straps open when placing or removing your child.
5. Dri-Seat Reduction Insert
For smaller children, use the Dri-Seat reduction insert. This insert provides additional comfort and support, and its bamboo fabric helps regulate temperature and absorb sweat.

Image: Close-up of the car seat interior with the Dri-Seat insert.
Maintenance
Cleaning the Car Seat
- The fabric cover can be removed for cleaning. Refer to the care label on the cover for specific washing instructions. Typically, machine wash on a gentle cycle with mild detergent.
- Do not use harsh chemicals or abrasive cleaners on any part of the car seat.
- Wipe plastic parts with a damp cloth and mild soap.
- Allow all parts to air dry completely before reassembling or using the car seat.
General Care
- Regularly check all components for wear, damage, or loose parts.
- Ensure the harness system is free from twists and damage.
- Store the car seat in a dry, cool place when not in use.
Troubleshooting
Common Issues and Solutions:
- Car seat feels loose after installation: Check that ISOFIX connectors are fully engaged (green indicators visible) and the stabilization leg is firmly planted and locked. Push the seat firmly against the vehicle's backrest.
- Harness is difficult to tighten/loosen: Ensure the harness straps are not twisted. Check for any obstructions in the harness mechanism.
- Belt alarm sounds unexpectedly: Verify that the harness buckle is fully engaged. If the child is unbuckling themselves, reinforce proper usage. If the alarm persists without cause, contact customer support.
- Swivel mechanism is stiff: Ensure the seat is in an upright position (not reclined) before attempting to swivel. Check for any debris obstructing the swivel base.
If you encounter any issues not listed here, please contact Lionelo customer support.
Specifications
| Feature | Detail |
|---|---|
| Model Number | LO-HARMONY I-SIZE GREY GRAPHITE LEATHER |
| Child Height Range | 40-150 cm |
| Maximum Weight Recommendation | 36 kg |
| Product Dimensions (L x W x H) | 54 x 44 x 59 cm |
| Item Weight | 13.3 kg |
| Installation Type | ISOFIX with Stabilization Leg |
| Orientation | Rear-facing (40-105 cm), Forward-facing (100-150 cm) |
| Material | EPS, Memory Foam, PP, Polyester, Bamboo Fabric |
| Harness Type | 5-point |
| Headrest Height Positions | 12 |
| Recline Positions | 5 (both orientations) |
| Country of Origin | China |
Warranty and Support
For warranty information, please refer to the documentation included with your purchase or visit the official Lionelo website. If you require assistance, have questions, or need to report an issue, please contact Lionelo customer support.
You can find contact details on the Lionelo Brand Store.





