If the rear bench seat/rear seat and seat backrest are not engaged they could fold forwards, e.g. when braking suddenly or in the event of an accident.
If this is the case, the vehicle occupant would be forced into the seat belt by the rear bench seat/rear seat or by the seat backrest. The seat belt cannot protect as intended and could result in additional injury.
Objects or loads in the boot/load compartment cannot be restrained by the seat backrest.
If the left and right seat backrests are not engaged and locked in place, this will be shown on the multifunction display of the instrument cluster. A warning tone will also sound.
If the centre seat backrest is not engaged and locked, the red lock verification indicator will be visible.
The centre and outer seat backrests can be folded forwards separately.
The outer seat backrests are unlocked electrically. The release buttons are located inside the load compartment.
into the seat belt extender 
. 
. The corresponding seat backrest will fold forwards.
of the seat backrest 
forwards. forwards.