See also:

Important notes
In order to prevent the vehicle's battery from discharging, the interior lighting functions are automatically deactivated after some time except for when the SmartKey is in position 2 in the i ...

Deactivating
Press and hold the closing button () in the tailgate until you hear two short tones. ...

Rejecting or ending a call
► Press the button on the steering wheel. If you are not in the Telephone menu, you can still accept a call. ...