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 headliner and carpets
Roof lining: use soft brushes or dry
shampoo if it is particularly dirty.
Carpets: use carpet and textile cleaners
that have been approved and
recommended by Mercedes-Benz. ...
Tire pressure of cold tires
The tires are cold:
• if the vehicle has been parked without
direct sunlight on the tires for at least three
hours and
• if the vehicle has not been driven more than
1 mile (1.6 km). ...
Checking tire pressure electronically
•► Make sure that the SmartKey is in position
2 in the ignition lock.
•► Press the button on the
steering wheel to select the Service
menu.
•► Press the button to sel ...