Operating Touch Control (MBUX multimedia system)
button Shows the home screen and calls up applications
Calls up suggestions, themes and favourites: when the home screen is shown, swipe down on Touch Control 
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buttonPressing briefly: returns to the previous display
You can navigate in menus and lists via the touch-sensitive surface of Touch Control by using a single-finger swipe.
To select the menu item or entry:
swipe up, down, left or right. Press Touch Control .
. To enter a character:
enter a character using the keyboard. To move the digital map:
swipe in any direction.