Mercedes-Benz CLA Owner's Manual page 326

Using the keyboard
1 Input line
2
Shows suggestions during input (if available)
3 Deletes an entry
4 Deletes
Pressing or pressing briefly deletes the last
character entered
Pressing and holding deletes the entry
5 Accepts an entry
6 Switches to handwriting input
7
Enters a space
8 Changes the keyboard language
9 Switches to special characters
A
Switches to digits and additional special
characters (if available for the current char‐
acter set)
MBUX multimedia system 323
ABC Switches to letters (level 2)
B Pressing or pressing briefly switches
between upper-case and lower-case letters
(if available for the current character set)
Pressing and holding switches to upper-case
letters permanently