For the rear seat
In order to use the cup holder, allow the armrest (A) to drop down.

See also:
Interior Design & Comfort
Mitsubishi has taken a minimalist approach with the Lancer Sportback's cabin
styling, and some places it works while in others it doesn't. While the
dashboard has an uncluttered, simple look that' ...
Anti-lock brake system (ABS)
The anti-lock brake system (ABS) helps prevent the wheels from locking during
braking. This helps maintain vehicle drivability and steering wheel handling. ...
Driver’s seat belt warning lamp and display
Warning lamp
A tone and warning lamp are used to remind the driver to fasten the seat belt.
If the ignition switch is turned to the “ON” position or the operation mode is
put in ON while a ...
