What is the reason why the Mercedes-Benz key does not close the windows when held down?

[AshleyLee]

The reason why the Mercedes-Benz key does not close the windows when held down is the failure of the one-touch up/down function, which requires reinitialization of the function. The specific method is as follows: 1. Press the one-touch up/down button 6 times, releasing it each time, and on the 6th press, release it and the window will automatically rise; 2. Lift up the four window buttons; 3. For the first lift, release the button when the window reaches the top; 4. For the second lift, do not release the button; 5. When the window automatically descends, release the button to complete the reset. Taking the Mercedes-Benz C-Class 2021 C200L Dynamic Sport Edition as an example: The manufacturer of this car is Beijing Benz, its class is mid-size car, and its energy type is gasoline.