1. Introduzione
This manual provides essential information for the correct installation, use, and maintenance of your Cybex ATON S2 i-Size infant car seat. Please read all instructions carefully before using the product and keep this manual for future reference. Failure to follow these instructions may result in serious injury to your child.
2. Informazioni sulla sicurezza
La sicurezza del tuo bambino è fondamentale. Rispetta sempre le seguenti linee guida di sicurezza:
- Non lasciare mai il bambino incustodito nel seggiolino.
- Prima di ogni viaggio, assicurarsi che il seggiolino auto sia correttamente installato e fissato nel veicolo.
- The harness system must be adjusted snugly to your child's body, with no slack.
- Non utilizzare il seggiolino auto se è stato coinvolto in un incidente, anche se non presenta danni visibili. Danni interni potrebbero comprometterne la sicurezza.
- Always position the carrying handle in the upright position when driving, unless otherwise specified for a specific vehicle installation.
- Do not modify the car seat in any way. Use only original Cybex accessories and spare parts.
- Protect the car seat from direct sunlight when not in use to prevent components from overheating, which could burn your child.
- Refer to your vehicle's owner's manual for specific information regarding child restraint installation.
3. Componenti finitiview
Familiarize yourself with the main components of your ATON S2 i-Size infant car seat:
- Maniglia per il trasporto
- Tettoia solare
- Headrest and Harness Adjustment Lever
- Shoulder Straps and Buckle
- Pulsante di rilascio del cablaggio
- L.S.P. System (Linear Side-impact Protection)
- Recline Adjustment Lever (if applicable)
- Base Attachment Points (for ISOFIX base)

Figura 1: lato view of the Cybex ATON S2 i-Size infant car seat, showing its general shape and carrying handle in a lowered position.
4. Configurazione e installazione
4.1. Adjusting the Carrying Handle
The carrying handle has multiple positions. To adjust, press the buttons on both sides of the handle simultaneously and move it to the desired position. Ensure it clicks securely into place.

Figure 2: The Cybex ATON S2 i-Size infant car seat with its carrying handle in the upright position, suitable for transport.
4.2. Installing with an ISOFIX Base (Sold Separately)
The ATON S2 i-Size is designed for use with a compatible ISOFIX base for secure and easy installation. Follow these steps:
- Place the ISOFIX base on the vehicle seat.
- Extend the ISOFIX connectors from the base and push them into the ISOFIX anchorage points in your vehicle until they click into place. Indicators on the base will turn green.
- Adjust the load leg to the vehicle floor. Ensure it is firmly planted and the indicator turns green.
- Place the ATON S2 i-Size car seat onto the ISOFIX base. Push down firmly until it clicks into place. Check the indicator on the base to confirm correct attachment.
- Pull the car seat upwards to ensure it is securely attached to the base.

Figura 3: lato view of the Cybex ATON S2 i-Size car seat correctly installed on an ISOFIX base, showing the extended load leg.

Figura 4: Angolo frontale view of the Cybex ATON S2 i-Size car seat securely attached to an ISOFIX base, ready for use.
4.3. Linear Side-impact Protection (L.S.P. System)
The L.S.P. System is located on the side of the car seat closest to the vehicle door. Extend the L.S.P. protector by pressing the button and pulling it outwards. This system absorbs impact forces in the event of a side collision.

Figura 5: Posteriore view of the Cybex ATON S2 i-Size, illustrating the L.S.P. system extended from the side of the car seat, indicated by the arrow and sound wave graphic.
5. Istruzioni per l'uso
5.1. Regolazione del poggiatesta e dell'imbracatura
The headrest and harness system are integrated and adjust simultaneously. To adjust, pull the adjustment lever located at the back of the headrest upwards and move the headrest to the correct height. The shoulder straps should be level with or slightly below your child's shoulders.

Figura 6: Interno view of the Cybex ATON S2 i-Size, showing the integrated headrest and harness system with an arrow indicating vertical adjustment.
5.2. Proteggere il tuo bambino
- Press the red button on the buckle to open the harness.
- Posiziona il bambino nel seggiolino auto.
- Avvicinare le due linguette della fibbia e inserirle nella fibbia finché non scattano.
- Pull the adjustment strap at the front of the car seat to tighten the harness until it is snug against your child's body. Ensure you can only fit one finger between the harness and your child's collarbone.
5.3. Adjusting the Sun Canopy
The integrated sun canopy can be adjusted independently. Simply pull it forward or push it back to provide shade for your child. It offers UPF50+ sun protection.

Figura 7: lato view of the Cybex ATON S2 i-Size, demonstrating the adjustable sun canopy in various positions, indicated by the curved arrow.
5.4. Recline Function (Lie-Flat Position)
The ATON S2 i-Size features a recline function that allows for a near lie-flat position, promoting healthy development for newborns. To adjust, locate the recline lever (if present on your model) and follow the instructions for your specific base or car seat configuration.

Figura 8: lato view of the Cybex ATON S2 i-Size, illustrating the lie-flat position with a graphic representation of an infant lying comfortably.
5.5. Compatibilità del sistema di viaggio
The ATON S2 i-Size can be attached to compatible Cybex strollers to form a practical travel system. Consult your stroller's manual for specific attachment instructions.

Figure 9: The Cybex ATON S2 i-Size infant car seat mounted on a compatible Cybex stroller frame, demonstrating its travel system functionality.
6. Manutenzione
6.1. Pulizia delle coperture in tessuto
The fabric covers can be removed for cleaning. Refer to the care label sewn into the fabric for specific washing instructions. Typically, covers can be machine washed on a delicate cycle at 30°C (86°F) using a mild detergent. Do not tumble dry, iron, or dry clean.
6.2. Cleaning Plastic Parts
Plastic parts can be cleaned with a mild detergent and warm water. Do not use harsh cleaning agents or abrasive materials, as these can damage the plastic.
7. Risoluzione Dei Problemi
- Imbracatura troppo lenta: Ensure the harness adjustment strap is pulled firmly and the shoulder straps are at the correct height.
- Car seat not secure on base: Check that all ISOFIX indicators are green and the load leg is firmly extended. Re-install if necessary.
- Buckle not clicking: Ensure both buckle tongues are fully inserted into the buckle. Check for any obstructions.
- Difficulty adjusting headrest: Ensure the adjustment lever is fully engaged while moving the headrest.
If you encounter issues not covered here, please contact Cybex customer support or your retailer.
8. Specifiche
| Caratteristica | Specificazione |
|---|---|
| Numero di modello | 521003523 |
| Dimensioni del prodotto | Dimensioni: 66 x 44 x 39 cm |
| Peso del prodotto | 4.2 kg |
| Peso massimo consigliato | 13 chilogrammi |
| Batterie richieste | NO |
| Produttore | CibexItalia |
9. Garanzia e supporto
Your Cybex ATON S2 i-Size infant car seat comes with a manufacturer's warranty. Please refer to the warranty card included with your product or visit the official Cybex website for detailed warranty terms and conditions. For technical support, spare parts, or service inquiries, please contact your local Cybex retailer or Cybex customer service.





