Using the securing systems for child restraint systems
Only secure children using a child restraint system which is suitable and recommended for Mercedes-Benz vehicles, as well as appropriate to the height, age and weight of the child.
Always install a child restraint system on a rear seat if possible.
Only use the seat belt system, the ISOFIX mounting bracket or the Top Tether anchorages as securing systems for child restraint systems.
Fold upholstered lining 
upwards.
upwards. Turn the support on the rear side of upholstered lining by 90°.
by 90°. Upholstered lining remains folded upwards.
Attach the ISOFIX child restraint system to both ISOFIX mounting brackets 
.
. You can find additional important information on the safe transportation of children here:
Automatic front passenger airbag shutoff
Correct use of the seat belt More
Seats suitable for attaching belt-secured child restraint systems
Seats suitable for attaching ISOFIX restraint systems