It changes between letting fresh air in from out side or recycling the air round the cabin great if it stinks out outside or you want to warm there car up quicker on a cold morning, however if not set to fresh it can cause the car to mist up easier
It changes between letting fresh air in from out side or recycling the air round the cabin great if it stinks out outside or you want to warm there car up quicker on a cold morning, however if not set to fresh it can cause the car to mist up easier