1. Introduction
This manual provides essential instructions for the safe and proper use, installation, and maintenance of your CYBEX Eternis S with SensorSafe convertible car seat. Please read this manual thoroughly before using the car seat and keep it in a safe place for future reference.
The Eternis S is designed to accommodate children from birth up to 120 pounds, offering rear-facing, forward-facing, and belt-positioning booster modes.
2. Safety Features
The CYBEX Eternis S incorporates advanced safety technologies to protect your child.
2.1 SensorSafe Technology
The integrated SensorSafe chest clip connects to a smartphone app, providing critical alerts for various unsafe situations. These alerts include:
- Child becoming unbuckled during transit.
- Rear seat temperature becoming too warm or too cold.
- Child accidentally left in the vehicle.
- Child seated in the car seat for an extended period.
Image: The SensorSafe chest clip, designed to provide safety alerts.
Video: Overview of the Eternis S with SensorSafe features and benefits.
2.2 Linear Side Impact Protection (L.S.P.)
The Linear Side Impact Protection (L.S.P.) system is designed to absorb up to 25% more impact forces in certain side-impact collisions compared to the same car seat without the L.S.P. extended. Ensure the L.S.P. is properly extended on the side closest to the vehicle door.
Image: The L.S.P. system extended from the side of the car seat.
2.3 Patented Reclining Headrest
The Eternis S features a patented reclining headrest that helps prevent your child's head from falling forward while asleep, maintaining an ergonomically correct and safe position for the head and neck. The headrest offers 12 height settings for easy adjustment as your child grows.
Image: The adjustable headrest of the car seat.
3. Setup and Installation
The CYBEX Eternis S offers three modes of use: Rear-Facing, Forward-Facing, and Belt-Positioning Booster. Always refer to your vehicle's owner's manual for specific car seat installation instructions and locations.
Image: The three modes of the Eternis S car seat: Rear-Facing (4-50 lbs), Forward-Facing (22-65 lbs), and Belt-Positioning Booster (40-120 lbs).
3.1 Rear-Facing Installation (4-50 lbs)
For infants and toddlers weighing between 4 and 50 pounds, the car seat must be installed in the rear-facing position.
- Ensure the car seat is reclined to the appropriate rear-facing angle, indicated by the level indicator on the side of the seat.
- Position the car seat in the vehicle's back seat.
- Secure the car seat using either the vehicle's seat belt or the lower anchors (LATCH system).
- Ensure the car seat is tightly secured and does not move more than one inch side-to-side or front-to-back at the belt path.
Image: A child in the rear-facing car seat.
Image: Illustration of increased rear-facing legroom provided by the car seat's design.
3.1.1 Rear-Facing Installation with Vehicle Seat Belt
Video: Detailed instructions for installing the Eternis S in a rear-facing position using the vehicle's seat belt.
3.1.2 Rear-Facing Installation with Lower Anchors (LATCH)
Video: Detailed instructions for installing the Eternis S in a rear-facing position using the vehicle's lower anchors (LATCH system).
3.2 Forward-Facing Installation (22-65 lbs)
For children weighing between 22 and 65 pounds, the car seat can be installed in the forward-facing position.
- Ensure the car seat is in the upright forward-facing position.
- Position the car seat in the vehicle's back seat.
- Secure the car seat using either the vehicle's seat belt and top tether, or the lower anchors (LATCH system) and top tether. The top tether must always be used in forward-facing mode.
- Ensure the car seat is tightly secured and does not move more than one inch side-to-side or front-to-back at the belt path.
Image: A child in the forward-facing car seat.
3.2.1 Forward-Facing Installation with Lower Anchors & Tether
Video: Detailed instructions for installing the Eternis S in a forward-facing position using the vehicle's lower anchors and top tether.
3.2.2 Forward-Facing Installation with Vehicle Seat Belt & Tether
Video: Detailed instructions for installing the Eternis S in a forward-facing position using the vehicle's seat belt and top tether.
3.3 Belt-Positioning Booster Mode (40-120 lbs)
For older children weighing between 40 and 120 pounds, the car seat converts into a high-back belt-positioning booster.
- Remove the internal harness system as per the instructions in the car seat manual.
- Position the booster seat in the vehicle's back seat.
- Secure the child using the vehicle's lap and shoulder belt, ensuring the shoulder belt is positioned correctly across the child's shoulder and chest, and the lap belt is low across the hips.
Image: A child in the belt-positioning booster seat.
4. Operating Instructions
4.1 Harness Adjustment
The car seat features a 3-point harness system with 12 height positions for the headrest and harness. Adjust the headrest and harness height so that the shoulder straps are at or just below your child's shoulders for rear-facing, and at or just above your child's shoulders for forward-facing.
Image: The car seat's harness and headrest system.
4.2 Recline Positions
The Eternis S offers multiple recline positions. For rear-facing, ensure the recline angle is appropriate for your child's age and weight, as indicated by the level indicator. For forward-facing, select an upright position. The in-seat recline feature provides extra legroom for rear-facing children.
Image: The car seat's recline function.
4.3 Harness Holders
The car seat includes magnetic harness holders to keep the straps out of the way when placing your child in or taking them out of the seat.
Image: Magnetic harness holder for convenience.
4.4 Cup Holder
An attachable cup holder is provided for convenience. Ensure it is securely attached before use.
Image: Car seat with an attached cup holder.
5. Maintenance
Regular cleaning and maintenance will ensure the longevity and safety of your car seat.
- Fabric Covers: The fabric covers are designed for easy removal and cleaning. Refer to the care label on the fabric for specific washing instructions. Typically, machine wash cold on a delicate cycle and air dry.
- Harness Straps: Wipe harness straps with a damp cloth. Do not machine wash or submerge harness straps in water, as this can weaken the webbing.
- Plastic and Metal Parts: Wipe plastic and metal parts with a damp cloth and mild soap. Do not use abrasive cleaners or solvents.
- Buckle: Periodically check the buckle for debris. Clean with a damp cloth if necessary.
6. Troubleshooting
If you encounter issues with your CYBEX Eternis S car seat, refer to the following common solutions.
- SensorSafe App Not Connecting/Alerts: Ensure your smartphone's Bluetooth is enabled and the SensorSafe app is updated to the latest version. Check the SensorSafe chest clip for any obstructions or damage. Refer to the SensorSafe user guide for detailed pairing and troubleshooting.
- Harness Straps Sticking/Not Adjusting: Check for any twists or obstructions in the harness webbing behind the car seat shell. Ensure the harness adjuster button is fully pressed when attempting to loosen or tighten the straps. Do not force the straps.
- Car Seat Feels Loose After Installation: Re-read the installation instructions carefully for your chosen mode (rear-facing, forward-facing). Ensure the vehicle's seat belt or LATCH connectors are routed correctly and tightened as much as possible. Apply pressure to the car seat while tightening to remove slack. The car seat should not move more than one inch at the belt path.
7. Specifications
| Feature | Detail |
|---|---|
| Model Number | 518002881 |
| Maximum Weight Recommendation | 120 pounds |
| Minimum Weight Recommendation | 4 pounds |
| Rear Facing Maximum Weight | 50 pounds |
| Forward Facing Maximum Weight | 120 pounds |
| Rear Facing Minimum Weight | 4 pounds |
| Forward Facing Minimum Weight | 22 pounds |
| Maximum Height Recommended | 57 inches |
| Installation Type | LATCH, Seat Belt |
| Harness Type | 3-Point |
| Number of Height Positions | 12 |
| Item Weight | 26 pounds |
| Material Type | Alloy Steel |
| Color | Lavastone Black |
8. Warranty Information
For detailed warranty information regarding your CYBEX Eternis S car seat, please refer to the warranty card included with your product packaging or visit the official Cybex website. Warranty terms and conditions may vary by region.
9. Customer Support
If you require further assistance, have questions about installation, or need to report an issue, please contact Cybex customer support.
- Official Website: Visit the Cybex Store on Amazon (for product information and resources)
- Refer to the contact information provided in your product's physical manual for direct customer service channels.
