Operating Touch Control (MBUX multimedia system)
button Shows the home screen and calls up applications
buttonPressing briefly: returns to the previous display
rocker switchPress down briefly: shows favourites
Control knob
Turn: adjusts the volume VOL
Press: switches off the sound 
rocker switchPress up: makes or accepts a call
rocker switchPress down: rejects or ends a call
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.