Mercedes-Benz GLB Owner's Manual page 311

308 Instrument Display and on-board computer
wet carriageways
R
objects on the display cover
R
polarisation in sunglasses
R
% In extreme sunlight, sections of the display
may appear washed out. You can correct this
by deactivating and reactivating the head-up
display.
Switching the head-up display on/off via the
multimedia system
Multimedia system:
© Settings Quick access
4 5 5
Select HUD.
#
The head-up-display is activated.