maximum of 4 m/s
2
. This is equivalent to
approximately 40 % of the maximum braking
power of the vehicle. You must also apply the
brakes yourself to avoid a collision.
In order to maintain the appropriate distance
to the vehicle in front and thus prevent a
crash, you must apply the brakes yourself.
At speeds up to approximately 70 km/h,
PRE-SAFE
®
Brake can also detect stationary
obstacles, for example stopped or parked
vehicles.
G
Risk of accident
If, in a critical driving situation, you do not
receive a visual and acoustic warning:
R
PRE-SAFE
®
Brake did not detect the risk of
a collision
R
PRE-SAFE
®
Brake is deactivated
R
PRE-SAFE
®
Brake has failed
You must then brake to avoid a collision.
X
To activate/deactivate: activate or deac-
tivate PRE-SAFE
®
Brake in the on-board
computer (
Y
page 240).
After activation, the
Ä
symbol is dis-
played on the left in the driver display.
Vehicles with COMAND and a navigation sys-
tem*: the radar sensor system is switched off
automatically in the vicinity of radio telescope
facilities (
Y
page 446).
For PRE-SAFE
®
Brake to assist you when driv-
ing, the radar sensor system must be
switched on and operational.
PRE-SAFE
®
Brake does not always clearly
identify complex traffic situations properly.
You can terminate the intervention of PRE-
SAFE
®
Brake in a non-critical driving situation
at any time if:
R
an acoustic and visual warning occurs
R
the vehicle brakes gently
To end this you can either depress the accel-
erator pedal further, activate kickdown or
release the brake pedal.
The braking intervention of PRE-SAFE
®
Brake
is ended automatically if:
R
you manoeuvre to avoid the obstacle.
R
you drive slower than approximately
15 km/h.
R
there is no longer an obstacle detected in
front of your vehicle.
R
there is no longer any danger of a collision.
i
While Distronic Plus is activated, PRE-
SAFE
®
Brake remains passive.
Following a collision or crash-related damage
to the front end of the vehicle, have the con-
figuration and operation of the radar sensors
checked. Choose a qualified specialist work-
shop for this which has the necessary spe-
cialist knowledge and tools for the work
required. Mercedes-Benz recommends that
you use a Mercedes-Benz Service Centre for
this purpose.
Anti-theft systems
Immobiliser
The immobiliser prevents your vehicle from
being started without the correct key.
Activating the immobiliser
X
With the key: remove the key from the
ignition lock.
X
With KEYLESS GO*: press the start/stop
button on the dashboard.
The engine switches off.
Deactivating the immobiliser
X
With the key: turn the key to position 2 in
the ignition lock.
X
With KEYLESS GO*: press the start/stop
button on the dashboard twice without
depressing the brake.
58
Anti-theft systems
Safety
* optional
221_AKB; 2; 3, en-GB
bjanott,
Version: 2.11.7.7
2009-02-27T14:56:10+01:00 - Seite 58
Dateiname: 6515231002_buchblock.pdf; erzeugt am 03. Mar 2009 15:16:53; WK