Protection against theft
Immobiliser
The immobiliser prevents your vehicle from
being started without the correct key.
X
To activate with the key: remove the key
from the ignition lock.
X
To activate with KEYLESS-GO start func-
tion or KEYLESS-GO: switch the ignition off
and open the driver's door.
X
To deactivate: switch on the ignition.
When leaving the vehicle, always take the key
with you and lock the vehicle. Anyone can start
the engine if a valid key has been left inside the
vehicle.
i
The immobiliser is always deactivated when
you start the engine.
ATA (Anti-Theft Alarm system)
X
To prime: lock the vehicle with the key or
KEYLESS-GO.
Indicator lamp
:
flashes. The alarm system
is primed after approximately 15 seconds.
X
To deactivate: unlock the vehicle with the
key or KEYLESS-GO.
or
X
Insert the key into the ignition lock.
A visual and audible alarm is triggered if the
alarm system is primed and you open:
R
a door
R
the vehicle with the emergency key element
R
the tailgate
R
the bonnet
X
To stop the alarm with the key: press the
%
or
&
button on the key.
The alarm stops.
or
X
Vehicles with KEYLESS-GO start function
or KEYLESS-GO: remove the Start/Stop but-
ton from the ignition lock (
Y
page 144).
X
Insert the key into the ignition lock.
The alarm stops.
X
To stop the alarm using KEYLESS-GO:
grasp the outside door handle. The key must
be outside the vehicle.
The alarm stops.
or
X
Press the Start/Stop button on the dash-
board. The key must be inside the vehicle.
The alarm stops.
The alarm does not switch off, even if you close
the open door that has triggered it, for example.
i
If the alarm stays on for more than
30 seconds, the Mercedes
‑
Benz emergency
call system automatically sends a message to
the Customer Centre. This is done by means
of a text message or a data connection.
The emergency call system sends a message
or establishes a data connection provided
that:
R
you have subscribed to the Mercedes
‑
Benz
emergency call system
R
the Mercedes
‑
Benz emergency call system
has been activated properly
R
the necessary mobile phone network is
available
Tow-away protection
Function
An audible and visual alarm is triggered if your
vehicle's angle of inclination is altered while
tow-away protection is primed. This can occur if
the vehicle is jacked up on one side, for exam-
ple.
Switching on
X
Make sure that:
76
Protection against theft
Safety
