Windows fogged up on the inside
Activate the cooling with air
dehumidification function 
.
Activate automatic mode
.
If the windows continue to fog up,
activate the defrosting function.
You should only select this
setting until
the windshield is clear again.
See also:
Switching to navigation mode
Press the function button once
or
twice.
or
Select Navi in the main function bar by
sliding and turning
the COMAND
controller and press to confirm.
In both cases, you will see ...
The windshield wipers are inoperative
The windshield wiper drive is malfunctioning.
Select another wiper speed on
the
combination switch.
Have the windshield wipers checked
at a
qualified specialist workshop. ...
Trailer load/noseweight
The trailer load/noseweight affects the gross
weight of the vehicle. If a trailer is attached,
the trailer load/noseweight is included in the
load along with occupants and luggage. The
trailer ...