The SmartKey must be close to the driver's door handle.

Point the tip of the SmartKey at the driver's door handle.
Press and hold the button until the side windows and the sliding sunroof or the panorama roof with power tilt/sliding panel are fully closed.
Make sure that all the side windows and the sliding sunroof or panorama roof with power tilt/sliding panel are closed.

On vehicles with a panorama roof with power tilt/sliding panel:
Press and hold the button again until the roller sunblinds of the panorama roof with power tilt/sliding panel close.
To interrupt convenience closing: release the button.