Function restrictions
Depending on the DVD, it is possible that certain functions or actions will be temporarily blocked or may not function at all.
As soon as you try to activate these functions
or actions, you will see the 
symbol
in the
display.
See also:
Cleaning the steering wheel and gear or selector lever
Thoroughly wipe with a damp cloth or use
leather care agents that have been
recommended and approved by Mercedes-
Benz. ...
Cigarette lighter
WARNING
When leaving the vehicle, always remove the
SmartKey from the ignition lock. Always take
the SmartKey with you and lock the vehicle.
Do not leave children unattended in the
vehicle, ...
Drinking and driving
WARNING
Drinking and driving and/or taking drugs and
driving are very dangerous combinations.
Even a small amount of alcohol or drugs can
affect your reflexes, perceptions and
judgment.
...