Mercedes-Benz C-Class Saloon, Owner'S Manual

Page: 76 / 568

If the vehicle is not opened within approximately
40 seconds after unlocking, it locks again. Anti-
theft protection is primed again.
Do not keep the key together with electronic
devices or metal objects. This can affect the
key's functionality.
% If battery check lamp 2 does not light up
after pressing the % or & button, the
battery is discharged.
Replacing the key battery (
→
page 75).
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.
R
The ignition is switched off.
#
To activate: press button 1 for approx‐
imately one second.
A visual and audible alarm is triggered.
#
To deactivate: briefly press button 1 again.
or
#
Press the start/stop button on the cockpit
(the key is inside the vehicle).
Changing the unlocking settings
Possible unlocking functions of the key:
R
central unlocking
R
unlocking the driver's door and fuel filler flap
#
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:
R
pressing the % button a second time cen‐
trally unlocks the vehicle
R
Vehicles with KEYLESS-GO: if you touch
the inner surface of the door handle on the
driver's door, only the driver's door and fuel
filler flap are unlocked.
Deactivating the key functions
If you do not use the vehicle or a key for an
extended period of time, you can reduce the
energy consumption of the respective key. To do
so, deactivate the key functions.
74 Opening and closing