If the power door lock switch does not operate electrically, the only way to lock the door(s) is with the mechanical key from the outside key hole.
You can lock the doors without the outside key hole as follows:
1. Open the door.
2. Insert the key into the emergency door lock hole and turn the key horizontally to lock.
3. Close the door securely.
Kia Cee'd JD Service Manual: Rear Seat Latch Repair procedures
Replacement
[LH]
•
Put on gloves to protect your hands.
•
...
Kia Cee'd JD Owners Manual: OFF
With manual transaxle
To turn off the engine (START/RUN position)
or vehicle power (ON position), stop
the vehicle then press the engine
start/stop button.
With automatic transaxle/DCT*
To turn off the engine (START/RUN position)
or vehicle power (ON position),
press the engine start/ ...