Warning
This system is not intended to replace
the driver's responsibility for driving the
vehicle and looking ahead. It warns
the driver if the vehicle is at risk of
a collision with the preceding vehicle,
a pedestrian or a cyclist. Just before
the imminent collision, it reduces the
vehicle's speed to avoid a collision or
to limit its severity.
The system may also react on animals.
However, animals smaller than 0.5 m
or objects on the road may not be
detected.
After a sudden lane change, the system
needs a certain time to detect the next
preceding vehicle.
The driver must always be ready to
take action and apply the brakes and
steer to avoid collisions.
Activation/Deactivation
Depending on version, the system is
automatically active by default every time
the engine is started, even if it was
deactivated during the last ignition cycle.
For further information:ð page 120
Active emergency braking can
be deactivated in the vehicle
personalization. Depending on version,
deactivation is only possible at a
standstill.
The system cannot be deactivated at a
speed above 10 km/h.
illuminates if deactivated, and a
message is shown on the cluster.
Functionality
Depending on the vehicle configuration
and the detected objects, there are
several operational speed ranges.
Active emergency braking operates from
5 km/h to 85 km/h when a pedestrian or a
cyclist has been detected.
Active emergency braking operates from
5 km/h to 135 km/h, when a moving or
stationary vehicle has been detected.
The system includes:
●
forward collision warning
●
emergency brake assist
●
automatic braking
Forward Collision Warning (FCW) ð
page 123
Automatic braking
Just before the imminent collision, this
function automatically applies limited
braking to reduce the impact speed of the
collision or prohibit a crash.
If active emergency braking is applied,
flashes on the cluster.
If active emergency braking is finished,
flashes for a few seconds. During this
time, active emergency braking cannot
be applied if there is a risk of a further
collision.
Below a speed of 50 km/h, automatic
braking may slow down the vehicle to
a complete stop. If the speed exceeds
this limit, automatic braking may reduce
the speed by a maximum of 50 km/h.
However, the driver must apply the brake
to come to a complete stop.
● Automatic transmission: If the vehicle
comes to a complete stop, autmatic
braking is maintained for a certain time.
Keep the brake pedal depressed to
prevent the vehicle from starting off
again.
●
Manual transmission: If the vehicle
comes to a complete stop, the engine
may stall. Keep the brake pedal
Advanced driving assistance systems 121
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