See also:

Cleaning the display
► Before cleaning the display, make sure that it is switched off and has cooled down. ► Clean the display surface using a commercially-available microfiber cloth and TFT/LCD display ...

General notes
WARNING All categories of messages contain important information which should be taken note of and, where a malfunction is indicated, addressed as soon as possible at an authorized Mercedes ...

Removing the mechanical key
Removing the mechanical key Push release catch 1 in the direction of the arrow and at the same time, remove mechanical key 2 from the SmartKey. ...