How to Activate the External Air Circulation in a Mercedes-Benz Air Conditioning System?
3 Answers
To activate the external air circulation in a Mercedes-Benz air conditioning system, follow these steps: 1. Turn on the car's air conditioning, ensuring the AC button remains in the on position; 2. Press the external circulation button on the dashboard to activate it. Taking the 2021 Mercedes-Benz C-Class as an example, its body dimensions are: length 4784mm, width 1810mm, height 1457mm, with a wheelbase of 2920mm and a fuel tank capacity of 66 liters. The 2021 Mercedes-Benz C-Class features a multi-link independent front suspension and a multi-link independent rear suspension. It is equipped with a 1.5T turbocharged engine, delivering a maximum horsepower of 156PS, a maximum power of 115kW, and a maximum torque of 250Nm, paired with a 9-speed automatic transmission.
The method to activate the exterior air circulation in a Mercedes-Benz is quite simple. Having driven a Mercedes for several years, here's my routine: After starting the car, locate the climate control panel on the center console. There's usually a button with a car icon featuring an arrow pointing into the vehicle - just press it. If the button's indicator lights up or the display shows the exterior air mode, you've successfully activated it. I personally prefer using this feature on highways as it introduces fresh air to help defog windows and maintain clear visibility. Additionally, while Mercedes' automatic climate control system defaults to auto-switching between interior/exterior circulation, you can manually press this button anytime to force exterior air intake. Note: Avoid using exterior circulation in congested urban areas to prevent exhaust fume intake. With prolonged use, the air intake can accumulate dust - I recommend checking and cleaning it every six months to prevent clogging, ensuring smoother and more comfortable operation.
Using the external air circulation in a Mercedes-Benz during long-distance drives is quite practical. The operation is straightforward: first, start the engine from the driver's seat, then look for the air circulation button in the climate control panel—usually depicted as a car with an incoming arrow—and press it to toggle. Once the indicator light shows the external mode, fresh air will flow in. I place great emphasis on safe driving; for instance, opening windows on highways or during rainy weather can easily cause fogging, but activating the external circulation quickly clears the fog, preventing accidents. After use, remember to keep it running for a while in well-ventilated areas like parks or suburban environments to purify the air system. If the air conditioning system isn't regularly switched between circulation modes, it can develop unpleasant odors, so it's important to make a habit of periodic operation to maintain system health.
