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4 mph (7 km/h). It uses radar sensor technol-
ogy to assess the traffic situation.
Up to a speed of approximately 155 mph
(250 km/h), Adaptive Brake Assist is capable
of reacting to moving objects that have
already been detected as such at least once
over the period of observation.
Up to a speed of approximately 44 mph
(70 km/h), Adaptive Brake Assist reacts to
stationary obstacles.
If Adaptive Brake Assist demands particularly
high braking force, preventative passenger
protection measures (PRE-SAFE
®
) are activa-
ted simultaneously (Y page 53).
X
Keep the brake pedal depressed until the
emergency braking situation is over.
ABS prevents the wheels from locking.
The brakes will work normally again if:
R
you release the brake pedal
R
there is no longer any danger of a collision
R
no obstacle is detected in front of your vehi-
cle
Adaptive Brake Assist is then deactivated.
Important safety notes
G
WARNING
Adaptive Brake Assist cannot always clearly
identify objects and complex traffic situa-
tions.
In such cases, Adaptive Brake Assist can:
R
intervene unnecessarily
R
not intervene
There is a risk of an accident.
Always pay careful attention to the traffic
situation and be ready to brake. Terminate
the intervention in a non-critical driving sit-
uation.
G
WARNING
Adaptive Brake Assist does not react:
R
to people or animals
R
to oncoming vehicles
R
to crossing traffic
R
when cornering
As a result, the Adaptive Brake Assist may
not intervene in all critical conditions. There
is a risk of an accident.
Always pay careful attention to the traffic
situation and be ready to brake.
Always adapt your speed to suit the prevail-
ing road and traffic conditions.
Due to the nature of the system, particularly
complicated but non-critical driving conditions
may also cause Adaptive Brake Assist to inter-
vene.
If Adaptive Brake Assist is not available due to
a malfunction in the radar sensor system, the
brake system remains available with full brake
boosting effect and BAS.
Adaptive brake lights
i
Observe the "Important safety notes" sec-
tion (Y page 57).
If you brake sharply from a speed of more than
50 km/h or if braking is assisted by BAS or
Brake Assist with Cross-Traffic Assist, the
brake lamps flash rapidly. In this way, traffic
traveling behind you is warned in an even
more noticeable manner.
If you brake sharply from a speed of more than
70 km/h to a standstill, the hazard warning
lamps are activated automatically. If the
brakes are applied again, the brake lamps light
up continuously. The hazard warning lamps
switch off automatically if you travel faster
than 10 km/h. You can also switch off the
hazard warning lamps using the hazard warn-
ing button (Y page 99).
ESP
®
(Electronic Stability Program)
General notes
i
Observe the "Important safety notes" sec-
tion (Y page 57).
ESP
®
monitors driving stability and traction,
i.e. power transmission between the tires and
the road surface.
If ESP
®
detects that the vehicle is deviating
from the direction desired by the driver, one or
more wheels are braked to stabilize the vehi-
cle. The engine output is also modified to keep
60
Driving safety systems
Safety
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