Switching pre-entry climate on/off control using the key
Requirements:
the high-voltage battery is charged sufficiently
the function has been activated via the multimedia system
To switch on:
unlock the vehicle. The climate control functions are activated for up to five minutes for pre-heating and pre-cooling.
Pre-entry climate control using the key cannot be activated more than twice when the vehicle is switched off.
To deactivate:
press the top or bottom of the 
button. The following functions will remain active once the vehicle has been started:
seat heating
seat ventilation