How to Turn on the External Circulation in a Mercedes-Benz?
2 Answers
The method to turn on the external circulation in a Mercedes-Benz is: 1. Press the one-touch start button to start the engine; 2. Press the AUTO button to activate the automatic air conditioning system; 3. Press the external circulation button to switch to the external circulation mode. Models under the Mercedes-Benz brand include: Mercedes-Benz GLS, Mercedes-Benz GLE, Mercedes-Benz GLC, Mercedes-Benz GLA, Mercedes-Benz CLA, etc. Taking the 2021 Mercedes-Benz GLS as an example, it is a mid-to-large-sized car with body dimensions of: length 4988mm, width 1890mm, height 1424mm, and a wheelbase of 2939mm. The 2021 Mercedes-Benz GLS is equipped with a 1.5T turbocharged engine, delivering a maximum horsepower of 184PS, a maximum torque of 280Nm, and a maximum power of 135kW, paired with a 9-speed automatic transmission.
When I first started driving my Mercedes, I also struggled with how to turn on the fresh air mode. Later, I found it quite simple. In the air conditioning control area, look for the icon marked with an arrow from outside the car entering the interior, or a button resembling a circulation symbol. Many cars label it as the 'RECIRC' button—press it once, and when the light is on, it's recirculation mode; when the light is off, it's fresh air mode, allowing outside air to enter. I usually start with fresh air mode when driving, especially when the car feels stuffy or has a smoky smell, as it quickly ventilates the cabin. For long drives without opening windows, fresh air mode helps maintain better air quality. Mercedes designs this feature quite intuitively—on digital screens, you can switch between modes with a simple touch. Developing this habit is beneficial, like using fresh air mode in traffic jams or rainy weather to reduce window fogging. However, be cautious about using it in dusty or heavily polluted areas to avoid bringing in dirty air. Regularly cleaning the air filter is also crucial, as proper maintenance enhances the effectiveness of fresh air mode. Give it a try—once you get used to it, it becomes second nature.
