Where is the external circulation button on the Audi A3?

[Jacob]

The external circulation button on the Audi A3 is located on the center console, to the right of the air conditioning temperature adjuster. Below are the relevant details: 1. Internal and external air circulation modes: Controls whether the blower draws air from inside or outside the vehicle. During cooling, the internal circulation mode is generally used, meaning the blower draws air from inside the vehicle. 2. Air temperature adjustment: Air is cooled by passing through the evaporator of the cooling system and heated by passing through the heater core. The proportion of air flowing through the heater core is controlled to adjust the temperature and humidity inside the vehicle. Airflow mode adjustment: Controls the direction of airflow—whether it is directed upward, toward the panel, toward the footwell, or a combination of these.