1. Introduction
The Kinderkraft COMFORT UP I-SIZE car seat is designed to provide safety and comfort for children with a height range of 76 to 150 cm, which corresponds to approximately 15 months up to 12 years of age, or a weight range of 9-36 kg under the old standard. This car seat complies with the latest R129 i-Size safety standard and has successfully passed crash tests. It offers a universal mounting solution, allowing installation even in vehicles without ISOFIX, using the car's 3-point seat belt.
This manual provides essential information for the correct installation, safe use, and maintenance of your COMFORT UP I-SIZE car seat. Please read it thoroughly before first use and keep it for future reference.
2. Safety Information
- i-Size Standard Compliance: The COMFORT UP I-SIZE car seat meets the stringent requirements of the R129 i-Size standard, ensuring high levels of safety.
- Crash Test Approved: This car seat has undergone and passed rigorous crash tests to confirm its protective capabilities.
- 5-Point Internal Harness: For younger children (up to 105 cm), the car seat features a 5-point internal safety harness with soft protectors and a crotch strap for secure restraint.
- Vehicle Seat Belt Installation: The car seat is installed using the vehicle's 3-point seat belt. Always ensure the belt is routed correctly through the designated guides and is securely fastened.
- Forward-Facing Use Only: This car seat is designed for forward-facing use only.
- Child Height and Weight Limits: Use for children between 76 cm and 150 cm in height. Do not use for children outside these specifications.

Image: The Kinderkraft COMFORT UP I-SIZE car seat, illustrating its adherence to i-Size safety standards and crash test approval.
3. Product Overview
The COMFORT UP I-SIZE car seat is designed to adapt to your child's growth, offering a long-term solution for safe travel.
Key Features:
- Adjustable headrest with 11 positions.
- EASY GROW SYSTEM for simultaneous headrest and harness adjustment.
- Wide, soft seat with breathable fabric.
- Modular seat reducer for smaller children.
- Special elastic straps to hold the harness open for easy child placement.
- Internal harness storage when transitioning to vehicle seat belt use.
Dimensions:
- Height: 61.5 - 84 cm
- Width: 44 cm
- Depth: 49 cm
- Weight: 4.8 kg

Image: Detailed dimensions of the Kinderkraft COMFORT UP I-SIZE car seat.
4. Setup and Installation
The COMFORT UP I-SIZE car seat is designed for quick and intuitive installation using your vehicle's 3-point seat belt.
Installation Steps:
- Place the car seat on the vehicle's seat, ensuring it is stable and flush against the backrest.
- Route the vehicle's 3-point seat belt through the designated belt guides on the car seat. These guides are typically colored (e.g., red or green) for easy identification.
- Fasten the vehicle's seat belt buckle with an audible click.
- Pull the shoulder strap of the vehicle's seat belt to remove any slack, ensuring the car seat is tightly secured to the vehicle seat.
- Verify that the car seat does not move excessively (more than 2.5 cm) from side to side or front to back.

Image: Visual guide for quick and intuitive installation of the car seat using the vehicle's seat belt.
5. Operating Instructions
Adjusting the Headrest and Harness (EASY GROW SYSTEM):
The COMFORT UP I-SIZE features an EASY GROW SYSTEM, allowing you to adjust the headrest and the internal 5-point harness simultaneously with one hand. This ensures the harness is always at the correct height for your child's shoulders.
- Locate the headrest adjustment lever, typically at the top or back of the headrest.
- Squeeze the lever and move the headrest up or down to one of the 11 available positions until it is just above your child's shoulders.
- Release the lever to lock the headrest in place.

Image: Detail of the headrest adjustment mechanism.
Using the 5-Point Harness:
For children up to 105 cm, use the internal 5-point harness.
- 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 adjustment strap at the front of the seat to tighten the harness until it is snug against your child's body, ensuring no more than two fingers can fit between the harness and your child's collarbone.
- To loosen the harness, press the release button (usually located near the adjustment strap) and pull the shoulder straps forward.

Image: A child secured in the car seat, demonstrating the 5-point safety harness and adjustable headrest.
Transitioning to Vehicle Seat Belt (for children above 105 cm):
When your child reaches 105 cm in height, the internal 5-point harness should be removed or stored. The COMFORT UP I-SIZE allows for convenient storage of the internal harness without needing to remove it from the car seat.
- Follow the instructions in the car seat manual for storing the internal 5-point harness. This typically involves unbuckling, loosening, and tucking the straps into designated compartments within the seat.
- Once the internal harness is stored, the child will be secured directly by the vehicle's 3-point seat belt.
- Ensure the vehicle's shoulder belt passes through the red belt guide on the car seat's headrest, resting correctly on the child's shoulder (not on the neck or arm).
- The lap belt should pass under the armrests of the car seat, resting low on the child's hips, not on the abdomen.

Image: The car seat adapts as the child grows, from using the internal harness to the vehicle's 3-point seat belt.
6. Maintenance
Regular maintenance ensures the longevity and hygiene of your car seat.
Cleaning Instructions:
- Fabric Cover: The car seat features a removable and easy-to-clean fabric cover. Refer to the care label on the cover for specific washing instructions. Typically, it can be machine washed on a delicate cycle with mild detergent. Do not tumble dry.
- Plastic Parts: Wipe plastic parts with a damp cloth and mild soap. Do not use abrasive cleaners or solvents.
- Harness Straps: Clean harness straps with a damp cloth and mild soap. Do not immerse the buckle in water.

Image: Demonstrating the removable and easy-to-clean upholstery of the car seat.
Storage:
When not in use, store the car seat in a clean, dry place away from direct sunlight and extreme temperatures.
7. Troubleshooting
If you encounter any issues with your COMFORT UP I-SIZE car seat, please refer to the following common solutions:
- Harness Not Tightening:
- Ensure the harness straps are not twisted or caught under the seat padding.
- Check that the adjustment strap is fully accessible and not obstructed.
- Verify that the buckle tongues are fully inserted into the central buckle.
- Car Seat Feels Loose After Installation:
- Re-check the routing of the vehicle's 3-point seat belt through all designated guides.
- Pull the shoulder belt firmly to remove all slack from the lap and shoulder portions of the vehicle belt.
- Ensure the car seat is pressed firmly into the vehicle seat during tightening.
- Headrest Adjustment Difficulty:
- Ensure the adjustment lever is fully squeezed before attempting to move the headrest.
- Check for any obstructions behind the headrest mechanism.
If the issue persists, please contact Kinderkraft customer support.
8. Specifications
| Feature | Detail |
|---|---|
| Model Number | KCCOUP02BLK0000 |
| Product Dimensions (D x W x H) | 49 x 44 x 61.5-84 cm |
| Weight | 4.8 kg |
| Color | Black |
| Minimum Recommended Weight | 9 kg |
| Maximum Recommended Weight | 36 kg |
| Minimum Recommended Height | 76 cm |
| Maximum Recommended Height | 150 cm |
| Material Type | Polypropylene, Polyester |
| Harness Type | 5-point |
| Number of Headrest Positions | 11 |
| Installation Type | Vehicle 3-point belt |
| Facing Direction | Forward-facing |
| Safety Standard | R129 i-Size |
9. Warranty and Support
The Kinderkraft COMFORT UP I-SIZE car seat comes with a 10-year warranty, reflecting its high quality and durability. This warranty covers manufacturing defects under normal use.
For warranty claims, technical support, or any questions regarding your car seat, please contact Kinderkraft customer service through their official website or the retailer where the product was purchased. Please have your model number (KCCOUP02BLK0000) and proof of purchase ready.

Image: The Kinderkraft COMFORT UP I-SIZE car seat, emphasizing its 10-year warranty and participation in the Safe Car Seat Program.





