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What is the automatic recirculated-air control "AUC" in my BMW with BMW Operating System 7?

For vehicles with BMW Operating System 7, the automatic recirculated-air control recognizes pollutants in the outside air. The outside air supply is shut off and the interior air is recirculated. If the system is activated, a sensor detects pollutants in the outside air and controls the shut-off automatically. If the system is deactivated, outside air continuously flows into the interior. With constant air recirculation mode, the air quality in the interior deteriorates and window fogging increases. If there is window condensation, switch off recirculated-air mode or defog the windows. 

 

Switching automatic recirculated-air control on/off:

  1. "CAR"
  2. "Settings"
  3. "Climate control"
  4. "Air quality"
  5. "Automatic" 
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