How to Turn on the External Circulation in a Mercedes-Benz?

[JohnLynn]

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.

[EdenAnn]

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.

[LeVivienne]

The operation of the external air circulation in Mercedes-Benz is quite straightforward. After starting the car, check the air conditioning panel where there's a dedicated button for switching between internal and external air modes. Generally, pressing it once turns off the internal circulation and switches to external circulation, allowing the fan to draw air from outside. Having driven several Mercedes models, I've noticed slight variations in the control positions across different models, with some featuring icon prompts near the knob. The advantage of using external circulation is improved air flow, preventing carbon dioxide buildup, which is especially comfortable on highways and helps reduce window fogging. A quick tip: avoid keeping the external circulation on in tunnels or during heavy traffic to prevent external exhaust fumes from polluting the interior air. It's best to use it in conjunction with the automatic air conditioning feature—Mercedes systems are smart enough to adjust the airflow automatically. Additionally, regular checks of the filter can enhance its efficiency.

[OJordan]

Turning on the external air circulation in a Mercedes is quite simple: Start the car, locate the recirculation button on the climate control panel (usually marked with an outward arrow or 'RECIRC'), and press it until the indicator light turns off – that means the external circulation mode is activated. This allows outside air to enter the cabin through the fan, which is ideal when you need better ventilation. Personally, I find using external circulation on highways safer than opening windows, plus it's more fuel-efficient; the air quality inside the car improves significantly. Just remember not to use it for extended periods in highly polluted areas.

[DelKyle]

The external circulation mode in Mercedes-Benz is actually very user-friendly. Simply locate the button with the external airflow symbol in the air conditioning control area, and press it to switch to the light-off state for external circulation. I always prioritize turning on the external circulation when driving a Mercedes, as it allows fresh air to flow in, which is beneficial for health; especially during long-distance driving, it helps prevent dizziness. An additional reminder: avoid using external circulation during severe smog as it can be unsafe; regularly replacing the filter ensures clean air filtration. Mercedes-Benz's design is truly thoughtful. Once you develop the habit, driving becomes more comfortable and reassuring.

[Matteo]

When driving a Mercedes, I'm used to keeping the exterior air circulation on at all times. The operation is quite simple: go to the air conditioning control panel, find the circulation mode button (usually marked with an icon showing outside air intake), and lightly press it to turn off the indicator light, which switches to exterior circulation. This draws fresh air from outside, instantly refreshing the cabin. I prefer using this mode after starting the engine or when there are many passengers to help eliminate odors. Mercedes' automatic system sometimes adjusts between interior and exterior modes automatically, but manual switching offers better control. I recommend using exterior circulation more often in areas with fresh air, briefly switching to interior mode in polluted zones. This maintenance approach helps preserve the filter for a healthier cabin environment. With practice, it'll become second nature.