If the driver removes the ignition key (smart key: turns off the engine) and opens the driver-side door when the sunroof is not fully closed, the warning chime will sound for approximately 7 seconds and a warning message will appear on the LCD display.
Close the sunroof securely when leaving your vehicle.
Kia Cee'd JD Service Manual: Luggage Side Trim Components and components location
Component Location
[5Door]
1. Luggage side trim
[3Door]
1. Luggage side trim
...
Kia Cee'd JD Service Manual: Rear Door Belt Inside Weatherstrip Repair procedures
Replacement
1.
Remove the rear door trim.
(Refer to Rear Door - "Rear Door Trim")
2.
Remove the rear door belt inside weatherstrip (A).
3.
Install in the reverse order of removal ...