If the rear seat backrests are not locked, they could fold forwards in the event of an accident, braking or sudden changes of direction.
As a result, child restraint systems can no longer perform their intended protective function. Rear seat backrests that are not locked can also cause additional injuries, e. g. in the event of an accident.
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 Top Tether. The Top Tether belt facilitates an additional connection between the child restraint system attached with ISOFIX or i‑Size and the vehicle.