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 seat backrest is not engaged and locked, this will be shown on the multifunction display on the instrument cluster.
The rear seat backrest head restraints are fully inserted.
The centre and outer seat backrests can be folded forwards separately.
The right seat backrest can be folded forwards only together with the centre seat backrest.
The outer seat backrests are unlocked electrically. Depending on the equipment, the release buttons are located either in the load compartment or beside the seat backrests.
. The corresponding seat backrest folds forwards.
of seat backrest 
forwards. forwards.