Mercedes-Benz CLA Owner's Manual page 70

Securing the child restraint system with the seat belt
Notes on the suitability of seats for attaching belt-secured child restraint systems
Rear seats
Weight category
Category 0: up to 10 kg
Category 0+: up to 13 kg
Category I: 9 to 18 kg
Category II: 15 to 25 kg
Category III: 22 to 36 kg
Left/right rear seat
U, L
U, L
U, L
U, L
U, L
U Suitable for child restraint systems of the "Universal" category in this weight category.
L Suitable for semi-universal child restraint systems according to the table in "Recommended child restraint systems", or if the vehicle and the seat are listed in the
child restraint system manufacturer's vehicle model list.
Centre rear seat 1
1 Child restraint systems with a supporting bracket are not suitable for this seat.
U, L
U, L
U, L
U, L
U, L
Occupant safety 67