The rear seat backrests may fold forwards when driving.
In this case, child restraint systems may no longer perform their intended protective function. Additional injuries may also be caused.
Ensure that the rear seat backrest is engaged. To do so, pull forcefully on the seat backrest.
If the child restraint system is equipped with a Top Tether belt:
The risk of injury can be reduced by a Top Tether. The Top Tether belt enables an additional connection between the child restraint system attached with ISOFIX or i‑Size and the vehicle.
The Top Tether anchorages for the second row of seats are located on the rear side of the two outer rear seats on the second row of seats. For the third row of seats, use the Top Tether anchorage on the rear side of the seat backrest on the third row of seats.
upwards More. 
under head restraint between the two head restraint bars. 
into Top Tether anchorage 
without twisting. . Comply with the child restraint system manufacturer's installation instructions. downwards More. Make sure that you do not interfere with the correct routing of Top Tether belt .