Switching pre-entry climate control via the key on/off
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 via the key cannot be activated more than twice when the vehicle is switched off.
To switch off:
push the 
button up or down. The following functions will remain active once the vehicle has been started:
Seat heating
Seat ventilation