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:
Windshield/headlamp cleaning system
WARNING
Washer solvent/antifreeze is highly flammable. Do not spill washer solvent/ antifreeze
on hot engine parts, because it may ignite and burn. You could be seriously burned.
Use MB Summe ...
Vehicles with automatic transmission
Apply the electric parking brake.
Shift the transmission to position P.
Using the SmartKey
Turn the SmartKey to position 0 in the
ignition lock and remove it.
The immobilizer is activated.
...
Range of the sensors
General notes
The sensors must be free of dirt, ice and
slush; otherwise they may not function
correctly. Clean the sensors regularly, taking
care not to scratch or damage them.
Side view
...