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/i-Size mounting bracket or the Top Tether anchorages as securing systems for child restraint systems.
Attach the ISOFIX or i-Size child restraint system to both ISOFIX mounting brackets or i-Size mounting brackets .
or i-Size mounting brackets . or
Attach the i‑Size child restraint system to both i‑Size mounting brackets .
. The risk of injury can be reduced by Top Tether as Top Tether provides an additional connection between the child restraint system secured with ISOFIX or i-Size and the vehicle.
Fit the ISOFIX or i-Size child restraint system with Top Tether on the rear seat. Always comply with the child restraint system manufacturer's installation instructions when doing so.
Fold the rear seat backrest forwards More.
Hook Top Tether hook into Top Tether anchorage .
into Top Tether anchorage . Fold the rear seat backrest back More.
Make sure that Top Tether belt 
is not twisted and the seat backrest in the rear is locked.
is not twisted and the seat backrest in the rear is locked. Secure the child restraint system with ISOFIX or i-Size More.
Tension Top Tether belt from the boot.
from the boot. Make sure that there is sufficient seat belt strap to pull tight.
Always comply with the child restraint system manufacturer's installation instructions when doing so.
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
Seats suitable for attaching i‑Size child restraint systems
Child safety locks for the rear side windows More