With a flip of a switch, the electric third - row seat folds into the floor, creating a flat load surface. (automobilemag.com)
The boot volume stayed the same, at 540 liters, but the rear seats folding shall generate a plain loading surface. (mercedesblog.com)
Flip and fold seating for both the second and third rows which would both go into separate wells in the floor for a flat rear loading surface. (autoline.tv)