The indicator illuminates when the front fog lights are ON.
Kia Cee'd JD Owners Manual: To defog inside windshield
1. Set the fan speed to the desired
speed.
2. Select desired temperature.
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.
If the air conditioning is not selected
...
Kia Cee'd JD Service Manual: Repair procedures
Removal
1.
Disconnect the negative (-) battery terminal.
2.
Remove the crash pad lower panel.
(Refer to Body - "Crash Pad Lower Panel")
3.
Remove the BCM unit (A) after loosening nuts.
...