Mercedes-Benz GLC : Through-loading feature in the rear bench seat (EASY-PACK Quickfold) / Adjusting the angle of the rear seat backrests (cargo position)
To enlarge the cargo compartment, you can
adjust the seat backrests so that they are ten
degrees steeper (cargo position).

Fold the seat backrest
forwards.
Move bracket
in the direction of the
arrow.
Push seat backrest
back to bracket
until the backrest engages.
Requirements:
The left and center seat backrests are
engaged and joined together.
You can lock the center seat backrest release
catch if you want to secure the cargo compartment
against unauthorized access...
Other information:
WARNING Risk of accident and injury
caused by an insufficiently secured vehicle
rolling away
If the vehicle is not securely parked sufficiently,
it can roll away in an uncontrolled
way even at a slight downhill gradient.
On uphill or downhill
gradients, turn the
front wheels so that the vehicle rolls
towards the curb if it starts moving...
WARNING Risk of injury due to an open
cargo compartment floor
If you drive with the cargo compartment floor
open, objects could be flung around and hit
vehicle occupants as a result. There is a risk
of injury, particularly in the event of sudden
braking or a sudden change in direction...