1. Set the fan speed to the highest position.
2. Set the temperature to the hottest (HIGH) position.
3. Press the button.
4. The air conditioning will turn on according to the detected ambient temperature and outside (fresh) air position will be selected automatically.
Kia Cee'd JD Service Manual: Crash Pad Center Panel Repair procedures
Replacement
•
When prying with a flat-tip screwdriver, wrap it with protective
tape, and apply protective tape around the related parts, to
prevent damage.
...
Kia Cee'd JD Service Manual: Rear Shelf Side Trim Components and components location
Component Location
1. Rear shelf side trim
...