Opel INSIGNIA Owner's Manual page 76

74 Storage
Pull the release lever on one or both
sides and fold down the backrests
onto the seat cushion.
To fold up, raise backrests and guide
them into an upright position until they
engage audibly.
Ensure that the seat belts of the
outboard seats are placed in the
corresponding belt guides.
The backrests are properly engaged
when both red marks on the side near
the release lever are no longer visible.
9 Warning
Only drive the vehicle when the
backrests are securely locked into
position. Otherwise there is a risk
of personal injury or damage to the
load or vehicle in the event of hard
braking or a collision.
The seat belt of the centre seat could
be blocked when the backrest is
folded up too quickly. To unlock the
retractor, push in the seat belt or pull
it out by approx. 20 mm and then
release.
Opening the pass-through in the
rear centre backrest
Fold down rear armrest.