Anti-Theft Systems - Mercedes-Benz E-Class 2011 Owner's Manual

In particular, the detection of obstacles can
be impaired if there is:
dirt on the sensors or anything else cover-
R
ing the sensors
snow or heavy rain
R
interference by other radar sources
R
the possibility of strong radar reflections,
R
for example, in multi-storey car parks
a narrow vehicle travelling in front, e.g. a
R
motorbike
a vehicle travelling in front on a different
R
line
G WARNING
®
PRE-SAFE Brake does not react:
to people or animals
R
to oncoming vehicles
R
to crossing traffic
R
when cornering
R
As a result, PRE-SAFE
warnings or intervene in critical situations.
There is a risk of an accident. Always pay
careful attention to the traffic situation and be
ready to brake.
In order to maintain the appropriate distance
to the vehicle in front and thus prevent a col-
lision, you must apply the brakes yourself.
To activate/deactivate: activate or deac-
X
®
tivate PRE-SAFE Brake in the on-board
computer ( page 241).
Y
The Ä symbol appears in the multifunc-
tion display as long as the HOLD function
is not activated (
Y
On vehicles with parking guidance, the
Ä symbol is displayed when P is
engaged or you are driving faster than
35 km/h.
The radar sensor system is switched off auto-
matically in the vicinity of radio telescope
facilities ( page 398).
Y
Vehicles without COMAND and a navigation
system and vehicles for Australia: the radar
sensor system and on-board computer must
®
Brake may not give
page 194).

Anti-theft systems

be switched off in the vicinity of radio tele-
scope facilities ( page 247).
Y
®
For PRE-SAFE Brake to assist you when driv-
ing, the radar sensor system must be
switched on ( page 247) and be opera-
Y
tional.
Following damage to the front end of the vehi-
cle, have the configuration and operation of
the radar sensors checked at a qualified spe-
cialist workshop. This also applies to colli-
sions at slow speeds where there is no visible
damage to the front of the vehicle.
Anti-theft systems
Immobiliser
The immobiliser prevents your vehicle from
being started without the correct key.
To activate with the key: remove the key
X
from the ignition lock.
To activate with KEYLESS-GO: switch the
X
ignition off and open the driver's door.
To deactivate: switch on the ignition.
X
i
The immobiliser is always deactivated
when you start the engine.
ATA (Anti-Theft Alarm system)
A visual and audible alarm is triggered if the
alarm system is primed and you open:
a door
R
the vehicle with the emergency key ele-
R
ment
the boot lid/tailgate
R
the bonnet
R
The alarm is not switched off, even if you
close the open door that has triggered it, for
example.
77
Z