Driving Safety Systems; Abs (Anti-Lock Braking System); Braking (If Abs Intervenes); Off-Road Abs - Mercedes-Benz GLA 250 2019 Operator's Manual

Driving safety systems

60
Driving safety systems
Overview of driving safety systems
In this section, you will find information about
the following driving safety systems:

ABS (Anti-lock Braking System)

R
( page 60)
Y
BAS (Brake Assist System) (
R
Active Brake Assist (
R
®
ESP (Electronic Stability Program)
R
( page 63)
Y
EBD (Electronic Brake force Distribution)
R
( page 67)
Y
ADAPTIVE BRAKE (
R
STEER CONTROL (
R
Important safety notes
If you fail to adapt your driving style or if you
are inattentive, the driving safety systems can
neither reduce the risk of an accident nor
override the laws of physics. Driving safety
systems are merely aids designed to assist
driving.
You are responsible for maintaining the dis-
tance to the vehicle in front, for vehicle speed,
for braking in good time, and for staying in
lane. Always adapt your driving style to suit
the prevailing road and weather conditions and
maintain a safe distance from the vehicle in
front. Drive carefully.
The driving safety systems described only
work as effectively as possible when there is
adequate contact between the tires and the
road surface. Please pay special attention to
the notes on tires, recommended minimum
tire tread depths, etc. (
In wintry driving conditions, always use winter
tires (M+S tires) and if necessary, snow
chains. Only in this way will the driving safety
systems described in this section work as
effectively as possible.
ABS (Anti-lock Braking System)
General information
ABS regulates brake pressure in such a way
that the wheels do not lock when you brake.
page 61)
Y
page 61)
Y
page 67)
Y
page 67)
Y
page 305).
Y
This allows you to continue steering the vehi-
cle when braking.
The ! ABS warning lamp in the instrument
cluster lights up when the ignition is switched
on. It goes out when the engine is running.
ABS works from a speed of about 5 mph
(8 km/h), regardless of road-surface condi-
tions. ABS works on slippery surfaces, even
when you only brake gently.
Important safety notes
i
Observe the "Important safety notes" sec-
tion ( page 60).
Y
G
WARNING
If ABS is malfunctioning, the wheels could
lock when braking. The steerability and
braking characteristics would be severely
affected. There is an increased danger of
skidding and accidents.
Drive on carefully. Have ABS checked imme-
diately at a qualified specialist workshop.
When ABS is malfunctioning, other systems,
including driving safety systems, will also
become inoperative. Observe the information
on the ABS warning lamp (
display messages which may be shown in the
instrument cluster ( page 204).
Y
Braking
If ABS intervenes: continue to depress the
X
brake pedal vigorously until the braking sit-
uation is over.
To make a full brake application: depress
X
the brake pedal with full force.
If ABS intervenes when braking, you will feel a
pulsing in the brake pedal.
The pulsating brake pedal can be an indication
of hazardous road conditions, and functions as
a reminder to take extra care while driving.

Off-road ABS

An ABS system specifically suited to off-road
terrain is activated automatically once the off-
road program is activated (
At speeds below 20 mph (30 km/h), the front
wheels lock cyclically during braking. The dig-
ging-in effect achieved in the process reduces
page 233) and
Y
page 170).
Y