1. Introduction
This manual provides essential instructions for the safe and proper use, installation, and maintenance of your Evenflo All4One DLX 4-In-1 Convertible Car Seat. Please read all instructions carefully before using the car seat and keep this manual for future reference. This car seat is designed to grow with your child, offering four modes of use: rear-facing harness, forward-facing harness, high-back booster, and no-back booster.

Image 1.1: Front view of the Evenflo All4One DLX Convertible Car Seat.
2. Safety Information
The Evenflo All4One DLX 4-in-1 Car Seat meets or exceeds all applicable federal safety standards. It has undergone structural integrity testing at energy levels approximately twice the federal crash test standard, and is side-impact, rollover, and temperature tested.
2.1 Important Safety Warnings
- Always secure your child in the car seat according to the instructions for their age, weight, and height.
- Never leave a child unattended in the car, even for short periods.
- Ensure the car seat is correctly installed in your vehicle before each use.
- Do not use accessories or parts not approved by Evenflo.
- Discontinue use if the car seat has been involved in a crash, even if there is no visible damage.
2.2 Side-Impact Technology
The car seat features integrated side-impact technology designed to absorb energy in the event of a collision, providing enhanced protection for your child.

Image 2.1: Detail of the car seat's side impact protection.
2.3 GREENGUARD Gold Certification
This car seat is GREENGUARD Gold Certified, indicating it has met rigorous chemical emissions standards. This certification contributes to healthier indoor air quality for your child.

Image 2.2: GREENGUARD Gold Certified logo.
3. Setup & Installation
Proper installation is crucial for your child's safety. Refer to the detailed instructions below for each mode of use.
3.1 EasyClick LATCH System
The innovative EasyClick LATCH system allows for a secure installation. It ratchets to achieve a tight fit, simplifying the installation process.

Image 3.1: Engaging the EasyClick LATCH system.
3.2 Recline Positions
The car seat offers multiple recline positions to ensure proper angle for your child's comfort and safety, depending on the mode of use. Always refer to the recline indicator for correct positioning.

Image 3.2: Recline position indicator.
3.3 Harness and Headrest Adjustment
The harness and headrest can be adjusted simultaneously to 12 positions to accommodate your growing child. Ensure the harness straps are at or below the child's shoulders for rear-facing, and at or above for forward-facing.

Image 3.3: Adjusting the headrest and harness.
3.4 Modes of Use
The Evenflo All4One DLX supports four distinct modes:
- Rear-Facing Harness: For children 4-40 lbs and 17-40 inches.
- Forward-Facing Harness: For children 22-65 lbs and 28-49 inches, at least 2 years old.
- High-Back Booster: For children 40-120 lbs and 44-57 inches, at least 4 years old.
- No-Back Booster: For children 40-120 lbs and 44-57 inches, at least 4 years old.

Image 3.4: Visual guide to the four car seat modes.
4. Operating Instructions
4.1 SensorSafe Technology
The SensorSafe chest clip connects to your phone via an app, providing real-time alerts for potentially unsafe conditions. These alerts include unexpected chest clip unbuckling, unsafe temperature in the car, child unattended in the car, and a child seated for too long.

Image 4.1: Child secured with SensorSafe chest clip.

Image 4.2: Monitoring car seat status via the SensorSafe app.
4.2 Buckling and Unbuckling
To buckle your child, connect the two buckle tongues into the crotch buckle until you hear a click. To unbuckle, press the red button on the crotch buckle. Ensure the chest clip is positioned at armpit level.

Image 4.3: Car seat buckle mechanism.
4.3 Cupholders
The car seat includes integrated cupholders for convenience. Ensure they are clean and free of debris.

Image 4.4: Integrated cupholder.
5. Maintenance
5.1 Quick Clean Cover
The car seat features a Quick Clean Cover designed for easy removal and cleaning. This includes plush head and body pillows.

Image 5.1: Quick Clean Cover tag.

Image 5.2: Washing the car seat cover.
5.2 General Cleaning
- Refer to the care labels on the fabric for specific washing instructions.
- Plastic and metal parts can be wiped clean with a mild soap and water solution.
- Do not use abrasive cleaners or solvents.
6. Troubleshooting
If you encounter issues with your Evenflo All4One DLX car seat, consider the following common solutions:
- Difficulty with EasyClick LATCH: Ensure the LATCH connectors are fully extended before attempting to ratchet. If the strap is too tight, consult the full manual for instructions on how to loosen it.
- Recline Position Not Locking: Verify that the recline mechanism is free of obstructions and that you are attempting to lock it into an approved position for the current mode of use. If the issue persists, contact customer support.
- SensorSafe Alerts: Ensure your smartphone is paired correctly with the SensorSafe clip and that the app is running in the background. Check the SensorSafe clip battery if alerts are inconsistent.
- Harness Adjustment Issues: Confirm that the harness release button is fully depressed when attempting to loosen the straps, and that the straps are not twisted.
For more complex issues, refer to the complete product manual or contact Evenflo customer support.
7. Specifications
| Feature | Detail |
|---|---|
| Product Dimensions | 23.5 x 18.75 x 24.75 inches |
| Item Weight | 21.6 pounds |
| Maximum Weight Recommendation | 65 Pounds (Harness), 120 Pounds (Booster) |
| Maximum Height Recommendation | 52 Inches (Harness), 57 Inches (Booster) |
| Rear-Facing Minimum Child Weight | 4 Pounds |
| Harness Type | 5-Point |
| Installation Type | LATCH |
| Material Type | Plastic, Polyester, Polyurethane |
| Material Composition | 50% plastic, 50% polyurethane |
| Batteries Required | Yes (1 CR2 battery included for SensorSafe) |
| Color | Latitude Gray |

Image 7.1: Car seat dimensions.
8. Warranty Information
For detailed warranty information regarding your Evenflo All4One DLX Convertible Car Seat, please refer to the warranty card included with your product or visit the official Evenflo website. Warranty terms and conditions may vary and are subject to change.
9. Support
If you require further assistance with installation, operation, or troubleshooting, please utilize the following resources:
- Official Evenflo Website: Visit evenflo.com for product registration, FAQs, and additional support materials.
- Certified Car Seat Safety Technician: Evenflo offers live video support with certified car seat safety technicians to assist with proper vehicle installation. Check the Evenflo website for details on how to access this service.
- Customer Service: Contact Evenflo customer service for direct support. Contact details can be found on the Evenflo website or in the product packaging.





