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.
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 
rocker switch up or
down.
The indicator lamp in the rocker
switch lights up or goes out.
See also:
Fuse box on the left in the direction of
travel
Open the hood.
Remove any existing moisture from the
fuse box using a dry cloth.
AMG vehicles: remove the control unit
above the fuse box.
To open: undo screws 1 with an Allen
key.
...
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.
...
Using the SmartKey
– Turn the SmartKey to position 0 in the
ignition lock and remove it.
The immobilizer is activated.
If you turn off the engine with the
SmartKey and then remove it from the
ignition lock ...