Mercedes-Benz A-Class 2021 Operator's Manual page 176

174 Driving and parking
& WARNING Risk of an accident caused by
limited detection performance of Active
Brake Assist
Active Brake Assist cannot always clearly
identify objects and complex traffic situa‐
tions.
Always pay careful attention to the traf‐
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fic situation; do not rely on Active Brake
Assist alone. Active Brake Assist is only
an aid. The driver is responsible for
maintaining a sufficiently safe distance
to the vehicle in front, vehicle speed
and for braking in good time.
Be prepared to brake or swerve if nec‐
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essary.
Also observe the system limits of Active Brake
Assist.
The individual subfunctions are available in
various speed ranges:
The distance warning function can issue a warn‐
ing in the following situations:
From approximately 4 mph (7 km/h), if your
R
vehicle is critically close to a vehicle, cyclist
or pedestrian, you will hear an intermittent
warning tone and the L distance warning
lamp lights up in the instrument cluster.
®
Vehicles with PRE-SAFE : depending on
the country, an additional haptic warning
occurs in the form of slight, repeated ten‐
sioning of the seat belt.
Brake immediately or take evasive action, provi‐
ded it is safe to do so and the traffic situation
allows this.
Distance warning function (vehicles without
Driving Assistance Package)
The distance warning function can aid you in the
following situations with an intermittent warning
tone and a warning lamp:
at speeds up to approximately 155 mph
R
(250 km/h) when approaching vehicles
ahead
at speeds up to approximately 50 mph
R
(80 km/h) when approaching stationary vehi‐
cles, moving pedestrians and cyclists ahead
at speeds up to approximately 37 mph
R
(60 km/h) when approaching crossing
cyclists
Distance warning function (vehicles with
Driving Assistance Package)
The distance warning function can aid you in the
following situations with an intermittent warning
tone and a warning lamp:
at speeds up to approximately 155 mph
R
(250 km/h) when approaching vehicles
ahead