Display settings

the Select Vehicle by turning COMAND controller and press  to the COMAND controller and press confirm. to confirm.
the Select Display OFF by turning COMAND controller and press  to the COMAND controller and press confirm. to confirm.
or To switch on the display: press turn the COMAND controller. or Display design turn the COMAND controller.

See also:

Mercedes-Benz M-Class Owners Manual
...

Other bulbs
There are bulbs other than the Xenon bulbs that you cannot replace. Replace only the bulbs listed. Have the bulbs that you cannot replace yourself changed at a qualified specialist workshop. ...

Brake fluid level
If you notice that the brake fluid level in the brake fluid reservoir has fallen to the MIN mark or less, check the brake system immediately for leaks. Also check the thickness of the brake lini ...