Mercedes-Benz S-Class Coupe 2018 Operator's Manual page 60

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58
Opening and closing
If you do not open the vehicle within approx‐
imately 40 seconds after unlocking:
the vehicle is locked again
R
anti-theft protection is reactivated
R
Do not keep the SmartKey together with elec‐
tronic devices or metal objects. This can affect
the SmartKey's functionality.
%
If battery check lamp
2
does not light up
after pressing the % or & button, the
battery is discharged.
Activating/deactivating the acoustic locking
verification signal
Multimedia system:
Vehicle
î Vehicle Set-
,
.
tings
Acoustic Lock
.
Activate O or deactivate ª the function.
#
Activating/deactivating the panic alarm
Requirements
%
The panic alarm function is only available in
certain countries.
The ignition is switched off.
R
To activate: press button
1
#
imately one second.
A visual and audible alarm is triggered.
To deactivate: briefly press button
#
or
Press the start/stop button on the dash‐
#
board (the SmartKey is inside the vehicle).
Changing the unlocking settings
Possible unlocking functions of the SmartKey:
Central unlocking
R
Unlocking the driver's door and fuel filler flap
R
To switch between settings: press the
#
% and & buttons simultaneously for
approximately six seconds until the battery
check lamp flashes twice.
If the unlocking function for the driver's door
and fuel filler flap has been selected:
Pressing the % button a second time cen‐
R
trally unlocks the vehicle.
Vehicles with KEYLESS-GO: if you touch
R
the inner surface of the door handle on the
driver's door, only the driver's door and fuel
for approx‐
filler flap are unlocked.
Reducing the energy consumption of the
1
again.
SmartKey
All vehicles: if you do not use the vehicle or a
SmartKey for an extended period of time, you
can reduce the energy consumption of the

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