Rear seat center armrest
Part of the center rear backrest can be folded out to act as a center armrest.
There is a strap attached to the left side of the center rear seat. Pull this strap to fold the rear center armrest down.

The center armrest can provide extra arm support, and it also contains some additional features.
Cup holder
There is a cup holder with two slots in the armrest. To access the cup holder, push the front section of the center armrest and let go. The cup holder will slide out fully. Gently push it back in to hide it again when not in use.
Rear seat adjustment controls
There are two buttons on either side of the center armrest that control the tilt of the outer rear backrests.
Small item storage
There is a small open compartment near the headrest for storing items.