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To maintain the proper distance to the vehicle
in front of you and thus prevent a rear-end
collision, you must apply the brakes yourself.
X
Brake the vehicle immediately to avoid a
collision.
Under no circumstances should the driver
await the intermittent warning sound
before braking. Observe the following
warning note.
The intermittent warning sound ceases and
the distance warning lamp · goes out
when the necessary distance to the vehicle
ahead is again established.
The PRE-SAFE
®
Brake can react to stationary
obstacles such as standing or parked vehicles
at road speeds of up to approximately 40 mph
(70 km/h).
G
Warning!
If you do not receive visual or acoustic
warning signals, the PRE-SAFE
®
Brake may
R
not have recognized the collision risk
R
have been deactivated
R
be malfunctioning
Apply the brakes yourself to avoid a collision.
The PRE-SAFE
®
Brake does not always clearly
interpret complex traffic situations. If a visual
and/or acoustic warning is issued in an
uncritical driving situation, or if the vehicle
brakes lightly, you can interrupt the PRE-
SAFE
®
Brake maneuver by pressing down all
the way on the accelerator pedal, using
kickdown, or releasing the brake pedal.
The PRE-SAFE
®
Brake maneuver is
terminated immediately when
R
you avoid the obstacle by evasive steering
R
you drive less than 9 mph (15 km/h)
R
an obstacle can no longer be identified
ahead of you
R
the system no longer senses the risk of a
collision
i
The PRE-SAFE
®
Brake will remain passive
while DISTRONIC PLUS is switched on
(Y page 330).
After a hard collision or damage to the front
of the vehicle from an accident, have the
settings and operation of the radar sensors
checked by an authorized Mercedes-Benz
Center.
When traveling in Canada in a vehicle not
registered in Canada, you must switch off the
radar sensor system (Y page 236). Canadian
law does not permit the use of the radar
sensor system for vehicles from outside of
Canada.
When you switch off the radar system, the
following functions are deactivated:
R
PRE-SAFE
®
Brake
R
BAS PLUS (Y page 64)
R
DISTRONIC PLUS (Y page 330)
R
Blind Spot Assist (Y page 359)
X
Activating and deactivating: Activate or
deactivate the PRE-SAFE
®
Brake using the
instrument cluster control system
(Y page 232).
After the function has been activated, the
PRE-SAFE
®
Brake indicator Ä appears
in the instrument cluster. When the HOLD
function is switched on, the PRE-SAFE
®
Brake indicator Ä will not appear.
Anti-theft systems
Immobilizer
The immobilizer prevents unauthorized
persons from starting your vehicle.
When leaving the vehicle, always take the
SmartKey with you and lock the vehicle. The
engine can be started by anyone with a valid
SmartKey that is left inside the vehicle.
Anti-theft systems
71
Safety and security
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