Hyundai Kona (OS) 2018-2025 Owners Manual: Checking the engine coolant level
Check the condition and connections of all cooling system hoses and heater hoses.
Replace any swollen or deteriorated hoses.
The coolant level should be filled between MAX and MIN (or F (Full) and L (Low))
marks on the side of the coolant reservoir when the engine is cool.
If the coolant level is ...
Hyundai Kona (OS) 2018-2025 Owners Manual: Air intake control (7)
This is used to select outside (fresh) air position or recirculated air position.
To change the air intake control position, press the control button.
Recirculated air position
With the recirculated air position selected, air from the passenger compartment
will be drawn through the heating system ...