Active Brake Assist - Mercedes-Benz SL Operator's Manual

Driving safety systems
60
there are strong radar reflections, for exam-
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ple in parking garages
a narrow vehicle is traveling in front, e.g. a
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motorbike
a vehicle is traveling in front on a different line
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vehicles quickly move into the radar sensor
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system detection range
Recognition by the camera system is also
impaired in the event of:
dirt on the camera or if the camera is covered
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glare on the camera system, e.g. from the sun
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being low in the sky
darkness
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or if:
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pedestrians move quickly, e.g. into the path
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of the vehicle
the camera system no longer recognizes a
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pedestrian as a person due to special cloth-
ing or other objects
a pedestrian is concealed by other objects
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the typical outline of a person is not distin-
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guishable from the background
Following damage to the front end of the vehicle,
have the configuration and operation of the
radar sensors checked at a qualified specialist
workshop. This also applies to collisions at slow
speeds where there is no visible damage to the
front of the vehicle.
Following damage to the windshield, have the
configuration and operation of the camera sys-
tem checked at a qualified specialist workshop.
Function
To avoid a collision, Brake Assist with cross-
traffic function calculates the brake force nec-
essary if:
you approach an obstacle, and
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Brake Assist with cross-traffic function has
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detected a risk of collision
When driving at a speed under 20 mph
(30 km/h): if you depress the brake pedal,
Brake Assist with cross-traffic function is acti-
vated. The increase in brake pressure will be
carried out at the last possible moment.
When driving at a speed above 20 mph
(30 km/h): if you depress the brake pedal
sharply, Brake Assist with cross-traffic function
automatically increases the brake pressure to a
degree suited to the traffic situation.
Brake Assist with cross-traffic function provides
braking assistance in hazardous situations with
vehicles in front within a speed range between
4 mph (7 km/h) and 155 mph (250 km/h).
Up to a speed of approximately 44 mph
(70 km/h), Brake Assist with cross-traffic func-
tion may react to:
stationary objects in the path of your vehicle,
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e.g. stopped or parked vehicles
pedestrians in the path of your vehicle
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obstacles crossing your path, which move in
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the detection range of the sensors and are
recognized by them
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If Brake Assist with cross-traffic function
requires a particularly high braking force, pre-
ventative passenger protection measures
®
(PRE-SAFE ) are activated at the same time
( page 53).
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Keep the brake pedal depressed until the
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emergency braking situation is over.
ABS prevents the wheels from locking.
Brake Assist with cross-traffic function is deac-
tivated and the brakes function as usual again if:
you release the brake pedal.
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there is no longer a risk of collision.
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no obstacle is detected in front of your vehi-
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cle.
you depress the accelerator pedal.
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you activate kickdown.
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Active Brake Assist

General information
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Observe the "Important safety notes" sec-
tion ( page 58).
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Active Brake Assist consists of a distance warn-
ing function with an autonomous braking func-
tion and Adaptive Brake Assist.
Active Brake Assist can help you to minimize the
risk of a collision with the vehicle in front or
reduce the effects of such a collision.
If Active Brake Assist detects that there is a risk
of collision, you will be warned visually and
acoustically. If you do not react to the visual and
audible collision warning, autonomous braking
can be initiated in critical situations. If you apply
the brake yourself in a critical situation, Adap-