The CleanZone function checks and indicates whether or not all conditions have been met for good air quality in the passenger compartment.
If the conditions have not been met then the Clean Zone text is white. When all conditions have been met, this is indicated by the text changing colour to blue.
Conditions that need to be met:
CleanZone does not indicate that the air quality is good. It only indicates that the conditions for good air quality have been met.