Securing a Top Tether
WARNING Risk of injury or death if the rear seat backrests are not locked after fitting Top Tether belts
If the rear seat backrests are not locked, they could fold forwards in the event of an accident, heavy braking or sudden changes of direction.
As a result, child restraint systems cannot 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.
Always lock rear seat backrests after fitting Top Tether belts.
Observe the lock verification indicator.
If the left and right seat backrests are not engaged and locked in place, this will be shown on the multifunction display on the instrument cluster.
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 facilitates an additional connection between the child restraint system attached with ISOFIX or i‑Size and the vehicle.
Place the ISOFIX or i‑Size child restraint system with Top Tether on the rear seat. Be sure to comply with the child restraint system manufacturer's installation instructions when doing so.
Fold the rear seat backrest forward More.
Attach the Top Tether hook 
to the Top Tether anchorage 
.
to the Top Tether anchorage . Fold the rear seat backrest back More.
Make sure that the Top Tether belt 
is not twisted and the rear seat backrest is locked in place.
is not twisted and the rear seat backrest is locked in place. Secure the child restraint system with ISOFIX or i‑Size More.
Tension the Top Tether belt from the boot.
from the boot. Make sure that there is sufficient seat belt strap to pull tight.
Be sure to comply with the child restraint system manufacturer's installation instructions when doing so.