Activating/deactivating
WARNING
Any accumulation of snow and ice should be
removed from the rear window before driving.
Visibility could otherwise be impaired, endangering you and others.
The rear window defroster has a high current draw. You should therefore switch it off as soon as the window is clear as it only switches off automatically after several minutes.
http://strategic-human-resource.com/If the battery voltage is too low, the rear window defroster may switch off.
•► Turn the SmartKey to position 2 in the ignition lock.
•► Press the 
button.
The indicator lamp above the 
button
lights up or goes out.
See also:
Important safety notes
For BlueTEC vehicles only.
DEF is a non-flammable, non-toxic, colorless,
odorless and water-soluble fluid.
Rinse surfaces that have come into
contact with DEF immediately with water or
remov ...
Activating/deactivating
•► To activate: press the
button.
The indicator lamp above the button
lights up.
•► To switch off: press the
button.
The indicator lamp above the button
goes out. The co ...
Warning and display messages in the
multifunction display
– Activate ATTENTION ASSIST using the onboard
computer (Y page 232).
Symbol 1 appears in the multifunction
display.
– If necessary, take a break.
– Press or
to confirm the
message.
On l ...