How to open the internal circulation of Mercedes-Benz e300l?

To enable Mercedes-Benz E300L to start the internal circulation mode (also known as the circulating air mode), please follow the following steps:

1. Make sure that the vehicle is running or ignition, and make sure that the fan is turned off.

2. On the air conditioning/heating control panel of the vehicle, find the "air circulation" or "circulation" button. This is usually an icon similar to the outline of a car body and may have an inward arrow.

3. Press the "air circulation" or "circulation" button to make it enter the corresponding mode. When the internal circulation mode is turned on, the button may light up or display the corresponding icon. Generally speaking, you can switch to the inner loop mode by pressing a button.

4. In the internal circulation mode, the vehicle will not get air from the outside, but will circulate and filter the air inside the vehicle. This mode is suitable for use when it is necessary to isolate the external odor and prevent dust from entering the car or driving in an environment with poor air quality. However, because no fresh air enters the car, long-term use of the internal circulation mode may lead to the air inside the car becoming old and unhealthy.

The above is the general procedure about how to start the internal circulation mode of Mercedes-Benz E300L. Please note that the specific models and configurations may be different, so the best way is to refer to the user manual of Mercedes-Benz E300L or consult the dealer for accurate operating instructions.