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your current speed is so close that the PRE-
SAFE
®
Brake will not be capable of slowing
the vehicle sufficiently.
When the danger of a collision still persists
and you do not brake or accelerate
significantly, the PRE-SAFE
®
Brake may
initiate full application of the brakes
automatically.
G
Warning!
The PRE-SAFE
®
Brake will only respond with
brake assistance if it has clearly detected an
object. Detection can be impeded by
R
dirty or covered sensors
R
snowfall or heavy rain
R
disturbance from other radar sources
R
strong radar reflection such as in parking
garages
The PRE-SAFE
®
Brake uses radar signals that
are not reflected well by narrow objects and
absorptive materials. For this reason the PRE-
SAFE
®
Brake will not react to persons,
animals, and approaching traffic or cross-
traffic.
The PRE-SAFE
®
Brake may not detect narrow
vehicles driving in front of you, such as
motorcycles and vehicles driving offset from
your vehicle center.
G
Warning!
Depending on the vehicle speed, the
PRE-SAFE
®
Brake brakes your vehicle with a
maximum of 13 ft/s
2
(4 m/s
2
) before a
possible hard stop. This corresponds to about
40% of the maximum deceleration ability of
your vehicle. The driver must apply the brakes
additionally in order to prevent a collision. The
self-acting hard stop will be initiated when the
imminent danger of a collision exists, e.g.
when an evasive driving maneuver cannot
avoid an accident.
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
Driving safety systems
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Safety and security
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