Activating/deactivating immediate pre-entry climate control
WARNING Danger to life due to exposure to extreme heat or cold in the vehicle
If people, particularly children, are exposed to extreme temperatures over an extended period of time, there is a risk of serious injury or danger to life.
Never leave persons, children in particular, unattended in the vehicle.
Air conditioning of the vehicle interior can continue for up to 30 minutes, e.g. if the journey is interrupted.
The colours of the indicator lamp on button 
have the following meanings:
have the following meanings: Blue: cooling is activated.
Red: heating is activated.
Yellow: the departure time has been preselected.
Set the desired temperature using the 
button.
button. Press button .
. The red or blue indicator lamp on button will light up or go out.
You can also activate the function via the Mercedes me App.