When the interior light switch is in the DOOR position and all doors (and tailgate) are locked and closed, the room lamp will come on for 30 seconds if any of the below is performed.
At this time, if you press the door lock button, the lamps will turn off immediately.
Headlamp welcome
Puddle lamp: How Does Cross Traffic Alert Work
Cross Traffic Alert detects vehicles that
approach at a speed between 4–37 mph
(6–60 km/h). Coverage decreases when
the sensors are partially, mostly or fully
obstructed.
The sensor on the left-hand side is only
partially obstructed and zone coverage on
the right-hand side is maximized.
...
Kia Cee'd JD Service Manual: Side Airbag (SAB) Module Repair procedures
Removal
The side airbag cannot be disassembled from the seat back assembly,
so replace assembly when replacing the side airbag.
1.
Disconnect the battery negative cable and wait ...