Kia Carens: Evaporative Emission Control System / Fuel Filler Cap Description and operation
A ratchet tightening device on the threaded fuel filler cap reduces the chances
of incorrect installation, which seals the fuel filler. After the gasket on
the fuel filler cap and the filler neck flange contact each other, the ratchet
produces a loud clicking noise indicating the seal has been set.

Removal
1.
Lift the vehicle.
2.
Disconnect the vapor hose quick-connector (A) and ventilation hose (B).
3.
...
Other information:
Replacement
[Second row seat assembly]
(Except Europe and Australia)
[5-seat vehicle]
•
Put on gloves to protect your hands.
...
Height adjustment
You can adjust the height of the shoulder belt anchor to one of 4 positions for
maximum comfort and safety.
The height of the adjusting seat belt should not be too close to your neck. You
will not be getting the most effective protection. The shoulder portion should be
adjusted ...