Distance Warning Function; Autonomous Braking Function - Mercedes-Benz GLA 250 2019 Operator's Manual

Driving safety systems
62

Distance warning function

General information
The distance warning function can help you to
minimize the risk of a front-end collision with a
vehicle ahead or reduce the effects of such a
collision. If the distance warning function
detects that there is a risk of a collision, you
will be warned visually and acoustically.
Important safety notes
i
Observe the "Important safety notes" sec-
tion for driving safety systems (
G
WARNING
The distance warning function does not
react:
to people or animals
R
to oncoming vehicles
R
to crossing traffic
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when cornering
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The distance warning function may not give
warnings in all critical situations. 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.
G
WARNING
The distance warning function cannot
always clearly identify objects and complex
traffic situations.
In such cases, the distance warning function
may:
give an unnecessary warning
R
not give a warning
R
There is a risk of an accident.
Always pay careful attention to the traffic
situation and do not rely solely on the dis-
tance warning function.
Function
Starting at a speed of approximately 4 mph
(7 km/h), the distance warning function warns
you if you rapidly approach a vehicle in front.
An intermittent warning tone will then sound,
and the · distance warning lamp will light
up in the instrument cluster.
Brake immediately in order to increase the
X
distance from the vehicle in front.
or
Take evasive action, provided it is safe to do
X
so.
Due to the nature of the system, particularly
complicated but non-critical driving conditions
may also cause the system to display a warn-
ing.
With the help of the radar sensor system, the
page 60).
Y
distance warning function can detect obsta-
cles that are in the path of your vehicle for an
extended period of time.
Up to a speed of approximately 44 mph
(70 km/h), the distance warning function can
also react to stationary obstacles, such as
stopped or parked vehicles.

Autonomous braking function

If the driver does not react to the distance
warning signal in a critical situation, Active
Brake Assist can assist the driver with the
autonomous braking function.
The autonomous braking function:
gives the driver more time to react to critical
R
driving situations
can help the driver to avoid an accident or
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can reduce the effects of an accident
R
Vehicles without Active Distance Assist
DISTRONIC: the autonomous braking function
is available in the following speed ranges:
4 - 65 mph (7 - 105 km/h) for moving
R
objects
4 - 31 mph (7 - 50 km/h) for stationary
R
objects
Vehicles with Active Distance Assist
DISTRONIC: the autonomous braking function
is available in the following speed ranges:
4 - 124 mph (7 - 200 km/h) for moving
R
objects
4 - 31 mph (7 - 50 km/h) for stationary
R
objects
Due to the nature of the system, particularly
complicated but non-critical driving conditions
may also cause the autonomous braking func-
tion to intervene.