Hyundai Sonata LF Owner's Manual page 76

Child Seat Restraint Suitability for Seat Position using the Seat Belt - For Europe
Use child safety seats that have been officially approved and are appropriate for your children.
When using the child safety seats, refer to the following table.
Age group
0 : Up to 10 kg
(0 - 9 months)
0+ : Up to 13 kg
(0 - 2 years)
I : 9 kg to 18 kg
(9 months - 4 years)
II & III : 15 kg to 36 kg
(4 - 12 years)
U : Suitable for "universal" category restraints approved for use in this mass group
UF : suitable for forward-facing "universal" category restraints approved for use in this mass group
X : Seat position not suitable for children in this mass group
We recommend that a child restraint seat be installed in the rear seat. To ensure the safety of your
child, the front passenger's air bag must be deactivated when it should be necessary to install a child
restraint seat on the front passenger seat in exceptional circumstances.
Seating position
Front passenger Rear outboard
X
X
X
X
WARNING
Rear center
U UF
U UF
U UF
UF UF
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