The purpose of the air bag warning light in your instrument panel is to alert you of a potential problem with your air bag - Supplemental Restraint System (SRS).
When the ignition switch is turned ON, the warning light should illuminate for approximately 6 seconds, then go off. Have the system checked if:
Kia Cee'd JD Service Manual: Components and components location
Component Location
1. Even clutch actuator motor
2. Input shaft speed sensor 2
3. Intput shaft speed sensor 1
4. Gear Actuator
5. Inhibitor switch
6. Odd clutch actuator motor
7. Select motor
8. Shift motor
9. Manual control ...
Kia Cee'd JD Service Manual: Fuel Tank Repair procedures
Removal
1.
Release the residual pressure in the fuel line.
(Refer to Fuel Delivery System - "Release Pressure in Fuel Line")
2.
Fold the rear seat cushion.
(Refer to Body - "Rear Seat Assembly") ...