MERCEDES-BENZ B-CLASS HATCHBACK 2022 Owners Manual

If the system detects that the driver has not
s
teered the vehicle for a considerable period of
time or has removed their hands from the steering
wheel, display 1 appears. If the driver still does
not steer the vehicle, a warning tone sounds in
addition to the visual warning message.
If the driver does not react to the warning for a
considerable period, the system can initiate an
emergency stop ( page 249).
The warning is not issued or is stopped when the
driver gives conNrmation to the system:
= The driver steers the vehicle. =
Depending on t
he country: the driver presses
a steering wheel button or operates Touch
Control
If Active Steering Assist detects that a system
limit has been reached, a visual warning is issued
and a warning tone sounds.
Observe the notes on driving systems and your
responsibility; you may otherwise fail to recognise
dangers (  page 228).
System limits
Active Steering Assist has a limited steering tor-
que for lateral guidance. In some cases, the steer-
ing intervention is not suPcient to keep the vehi-
cle in the lane or to drive through exits.
The system may be impaired or may not function
in the following instances:
= There is poor visibility, e.g. due to snow, rain,
fog, heavy spray, greatly varying light condi-
tions or strong shadows on the carriageway.
= There is glare, e.g. from oncoming traPc,
direct sunlight or reOections.
= *nsuPcient road illumination. =
The windscr een is dirty, misted up, damaged
or covered in the vicinity of the camera, e.g.
by a sticker.
= No, or several, unclear lane markings are pres-
ent for one lane, or the markings change
quickly, forexample, in a construction area or
junctions.
= The lane markings are worn away, dark or cov-
ered up, e.g. by dirt or snow.
= If the distance to the vehicle in front is too
short and thus the lane markings cannot be
detected.
= The road is narrow and winding.
= There are obstacles on the lane or projecting
out into the lane, suchas object markers.
The system does not provide assistance in the fol-
lowing conditions:
= On tight bends and when turning.
= When crossing junctions.
= At roundabouts or toll stations.
= When towing a trailer.
= When the tyre pressure is too low. 248
Driving and parking

&
WARNING Risk of accident if A ctive Steer-
ing Assist unexpectedly stops functioning
If the system limits of Active Steering Assist
ar
e reached there is no guarantee that the
system will remain active or will keep the vehi-
cle in lane. 
Always keep your hands on the steering
wheel and obser
ve the traPc carefully. 
Always steer the vehicle paying attention
t

o traPc conditions. &
WARNING Risk of accident if A
ctive Steer-
ing Assist unexpectedly intervenes
The detection of lane markings and objects
ma
y malfunction and cause unexpected steer-
ing interventions. 
Steer according to tr
aPc conditions. Activating/deactivating Active Steering Assist
R

equirements:
= ESP n
is activated, but is not intervening. =
A
ctive Distance Assist DISTRONIC is activa-
ted.
Multimedia system: 4 © 5
Settings 5
Quick access 
Select O Act. Steer. Asst . Function of Active Emergency Stop Assist
If the system detects that the driver has not
s

teered the vehicle for a considerable period of
time or has removed their hands from the steering
wheel, display 1 appears in the Instrument Dis-
play. If the driver still does not steer the vehicle,
or gives no conNrmation to the system, a warning tone sounds in addition to the visual warning mes-
sag

e.
If the driver still does not respond to the warning,
the Beginning emergency stop message appears
in the Instrument Display. If the driver still does
not respond, Active Distance Assist DISTRONIC
reduces the speed. The vehicle is decelerated in
stages to a standstill.
Depending on the country, at speeds below
60 km/h the hazard warning lights switch on
automatically.
When the vehicle is stationary, the following
actions are carried out:
= The vehicle is secured with the electric park-
ing brake.
= Active Distance Assist DISTRONIC is ended.
= The vehicle is unlocked.
= If possible, an emergency call is placed to the
Mercedes-Benz emergency call centre.
The driver can cancel the deceleration at any time
by performing one of the following actions: = Steering Driving and parking
249

=
Br aking or accelerating
= Deactivating Active Distance Assist
DISTRONIC Active Brake Assist
Function of Active Brake Assist
A

ctive Brake Assist consists of the following func-
tions:
= Distance warning function
= Autonomous braking function
= Situation-dependent braking assistance
= Vehicles with Driving Assistance Package: Eva-
sive Steering Assist and cornering function
Active Brake Assist can help you to minimise the
risk of a collision with vehicles, cyclists or pedes-
trians or to reduce the eMects of such a collision.
If Active Brake Assist has detected a risk of colli-
sion, a warning tone sounds and the / dis-
tance warning lamp lights up in the instrument
cluster. Vehicles with PRE-SAFE
n
: depending on t
he coun-
try, an additional haptic warning occurs in the
form of slight, repeated tensioning of the seat
belt.
If you do not react to the warning, autonomous
braking can be initiated in critical situations.
In especially critical situations, Active Brake Assist
can initiate autonomous braking directly. In this
case, the warning lamp and warning tone occur
simultaneously with the braking application.
If you apply the brake yourself in a critical situa-
tion or apply the brake during autonomous brak-
ing, situation-dependent braking assistance
occurs. The brake pressure increases up to maxi-
mum full-stop braking if necessary.
Observe the notes on driving systems and your
responsibility; you may otherwise fail to recognise
dangers ( page 228). If autonomous braking or situation-dependent
br

aking assistance has occurred, display 1
appears in the Instrument Display and then auto-
matically goes out aser a short time.
If the autonomous braking function or the situa-
tion-dependent braking assistance is triggered,
additional preventive measures for occupant pro-
tection (PRE-SAFE n
) may also be initiated. &
WARNING Risk of an accident caused b
y
limited detection performance of Active
Brake Assist
Active Brake Assist cannot always clearly iden-
tify objects and com
plex traPc situations. 250
Driving and parking

In such cases, Active Brake Assist might:
= Giv
e a warning or brake without reason
= Not give a warning or not brake
Active Brake Assist is only an aid. The driver is
responsible for maintaining a suPciently safe
distance to the vehicle in front, vehicle speed
and for braking in good time. 
Always pay careful attention to the tr
aPc
situation; do not rely on Active Brake
Assist alone. 
Be prepared to brake or swerve if neces-
sar

y. If Active Brake Assist is deactivated or the func-
tions ar
e restricted, e.g. due to activation of
another driving system, the ê display message
appears in the driver's display.
If the system is unavailable due to dirty or dam-
aged sensors or due to a fault, or if the functions
are restricted, the

=
at speeds up t o approximately 80 km/h when
approaching moving pedestrians and cyclists
ahead
= at speeds up to approximately 70 km/h when
approaching stationary pedestrians, crossing
vehicles and stationary and crossing cyclists
Autonomous braking function (vehicles without
Driving Assistance Package)
If the vehicle is travelling at speeds above approx-
imately 7 km/h, the autonomous braking function
may intervene in the following situations:
= at speeds up to approximately 200 km/h
when approaching vehicles ahead
= at speeds up to approximately 80 km/h when
approaching cyclists ahead
= at speeds up to approximately 60 km/h when
approaching moving pedestrians, crossing
cyclists, and stationary vehicles Autonomous braking function (vehicles with Driv-
ing Assis
tance Package)
If the vehicle is travelling at speeds above approx-
imately 7 km/h, the autonomous braking function
may intervene in the following situations:
= at speeds up to approximately 250 km/h
when approaching vehicles ahead
= at speeds up to approximately 100 km/h
when approaching stationary vehicles
= at speeds up to approximately 80 km/h when
approaching cyclists ahead
= at speeds up to approximately 70 km/h when
approaching stationary and moving pedes-
trians, crossing vehicles and stationary and
crossing cyclists
Situation-dependent braking assistance (vehicles
without Driving Assistance Package)
The situation-dependent braking assistance can
intervene from a speed of approximately 7 km/h
in the following situations:
= at speeds up to approximately 250 km/h
when approaching vehicles ahead =
at speeds up t o approximately 80 km/h when
approaching stationary vehicles and cyclists
ahead
= at speeds up to approximately 60 km/h when
approaching moving pedestrians and crossing
cyclists
Situation-dependent braking assistance (vehicles
with Driving Assistance Package)
The situation-dependent braking assistance can
intervene from a speed of approximately 7 km/h
in the following situations:
= at speeds up to approximately 250 km/h
when approaching vehicles ahead
= at speeds up to approximately 100 km/h
when approaching stationary vehicles
= at speeds up to approximately 80 km/h when
approaching cyclists ahead
= at speeds up to approximately 60 km/h when
approaching stationary and moving pedes-
trians, crossing vehicles, and stationary and
crossing cyclists 252
Driving and parking

Cancelling a brake application of Active Brake
Assis t
You can cancel a brake application of Active
Brake Assist at any time by: = sharply depressing the accelerator pedal or
with kickdown
= releasing the brake pedal
Active Brake Assist may cancel the brake applica-
tion when one of the following conditions is fulNl-
led:
= You manoeuvre to avoid the obstacle.
= There is no longer a risk of collision.
= An obstacle is no longer detected in front of
your vehicle.
Evasive Steering Assist (only vehicles with Driving
Assistance Package)
Evasive Steering Assist has the following charac-
teristics:
= The ability to detect stationary or moving
pedestrians.
= Assistance through power-assisted steering if
it detects a swerving manoeuvre. =
A ctivation by an abrupt steering movement
during a swerving manoeuvre.
= Assistance during swerving and straightening
of the vehicle.
= Reaction from a speed of approximately
20 km/h up to a speed of approximately
70 km/h.
You can prevent the assistance at any time by
actively steering.
Cornering function (only vehicles with Driving
Assistance Package)
If the system detects a risk of a collision with an
oncoming vehicle when turning across an oncom-
ing lane, autonomous braking can be initiated at
speeds below 15 km/h before you have les the
lane in which you are driving. &
WARNING Risk of accident despit
e Eva-
sive Steering Assist
Evasive Steering Assist cannot always recog-
nise objects or com
plex traPc situations
clearly. Moreover, the steering support provided by
Ev

asive Steering Assist is not suPcient to
avoid a collision. 
Always pay careful attention to the tr
aPc
situation; do not rely on Evasive Steering
Assist alone. 
Be prepared to brake or swerve if neces-
sar

y. 
End the support by actively steering in
non-cr
itical situations. 
Drive at an appropriate speed if there
ar

e pedestrians close to the path of your
vehicle. System limits
F

ull system performance is not yet available for a
few seconds aser switching on the vehicle or aser
driving oM.
The system may be impaired or may not function,
particularly in the following situations:
= In snow, rain, fog, heavy spray, if there is glare,
in direct sunlight or in greatly varying light
conditions. Driving and parking
253

=
If t he sensors are dirty, misted up, damaged or
covered.
= If the sensors are impaired due to interference
from other radar sources, e.g. strong radar
reOections in multi-storey car parks.
= If a loss of tyre pressure or a defective tyre
has been detected and displayed.
= In complex traPc situations where objects
cannot always be clearly identiNed.
= If pedestrians or vehicles move quickly into
the sensor detection range.
= If pedestrians are hidden by other objects.
= If the typical outline of a pedestrian cannot be
distinguished from the background.
= If a pedestrian is not detected as such, e.g.
due to special clothing or other objects.
= If the driver's seat belt is not fastened.
= On bends with a tight radius.
% The Active Brake Assist sensors adjust auto-
maticall

y while a certain distance is being
driven aser the vehicle has been delivered. Active Brake Assist is unavailable or only par-
tiall

y available during the teach-in process.
Activating/deactivating Active Brake Assist
R
equirements:
= The vehicle is switched on.
Multimedia system: 4 © 5
Settings 5
Assistance
5 Active Brake Assist 
Select the desired setting.
Deactivating Active Brake Assist
% It is recommended that you always leave
A

ctive Brake Assist activated. 
Select Off.
The dis

tance warning function, the autono-
mous braking function and Evasive Steering
Assist are deactivated.
The system is switched on again the next time
the vehicle is started.
% If Active Brake Assist is deactivated, the æ
symbol appear
s in the status bar of the Instru-
ment Display. Speed Limit Assist
Function of Speed Limit Assist
%
Speed Limit Assist uses OpenStreetMap data,
whic
h is made available under the conditions
of the Open Database License (OBbL). For
more information, see: https://
www.osmfoundation.org/wiki/licence.
Speed Limit Assist detects speed limits with a
multifunction camer
a and displays them in the
instrument cluster and optionally in the head-up
display. The camera also detects speed limits with
a restriction indicated by an additional sign (e.g.
when wet). The system detects stop signs,
thereby preventing the engine from being
switched oM by the ECO start/stop function.
Observe the notes on driving systems and your
responsibility; you may otherwise fail to recognise
dangers (  page 228).
Warning when the maximum permissible speed is
exceeded
The system can warn you if you unintentionally
exceed the maximum permissible speed. To do
this, you can specify in the multimedia system by
how much the maximum permissible speed can 254
Driving and parking

be exceeded before a warning is issued. You can
specify whe ther the warning is to be just a visual
warning or an acoustic one as well.
Display in the Instrument Display
% The illustrations show the Instrument Display
in t
he widescreen cockpit. 1
Permissible speed
2 Permissible speed when there is a restriction
3 Additional sign with restriction
If Speed Limit Assist cannot determine the cur-
r
ent maximum permissible speed (e.g. due to
missing signs), the following display appears in
the Instrument Display: This is displayed continuously if the vehicle is in a
countr

y where Speed Limit Assist is not suppor-
ted. Speed Limit Assist is not available in all coun-
tries.
System limits
The system may be impaired or may not function
in the following situations:
= If there is poor visibility, e.g. due to insuPcient
illumination of the road, highly variable shade
conditions, rain, snow, fog or heavy spray.
= If there is glare, e.g. from oncoming traPc,
direct sunlight or reOections.
= If there is dirt on the windscreen in the vicinity
of the multifunction camera or if the camera is
misted up, damaged or obscured.
= If the traPc signs are hard to detect, e.g. due
to dirt, snow or insuPcient lighting, or
because they are covered. =
If y
ou turn sharply when passing traPc signs
outside the camera's Neld of vision.
Setting Speed Limit Assist
Multimedia system: 4 © 5
Settings 5
Assistance
5 Speed Limit Assist
Adjusting the type of warning 
Select Visual & audible , Visual or None.
Adjusting the warning threshold
This v
alue determines the speed at which a warn-
ing is issued when exceeded. 
Select Warning threshold. 
Set the desired speed.
% If one of the following systems is activated,
t

he speed detected can be manually adopted
as the speed limit:
= Active Distance Assist DISTRONIC
= Cruise control
= Variable limiter
Further information (  page 243). Driving and parking
255

TraPc
Sign Assis tFunction of
T
raPc Sign Assist
TraPc Sign Assist detects traPc signs with the
multifunction camera ( page 229). It assists
you by displaying detected speed limits and over-
taking restrictions in the Instrument Display.
Observe the notes on driving systems and your
responsibility; you may otherwise fail to recognise
dangers (  page 228).
Since TraPc Sign Assist also uses the data stored
in the navigation system, it can update the display
in the following situations without detecting traPc
signs.
If the system detects that you are driving onto a
section of road in the wrong direction of travel, it
triggers a warning.
The camera also detects traPc signs with a
restriction indicated by an additional sign (e.g.
when wet). These are only displayed if a restric-
tion applies or if the system cannot clearly deter-
mine whether the restriction applies. Warning when the maximum permissible speed is
e
xceeded
The system can warn you if you unintentionally
exceed the maximum permissible speed. To do
this, you can specify in the multimedia system by
how much the maximum permissible speed can
be exceeded before a warning is issued. You can
specify whether the warning is to be just a visual
warning or an acoustic one as well. Display in the Instrument Display Instrument display in the widescreen cockpit
1
Maximum permissible speed
2 Maximum permissible speed when there is a
r

estriction
3 Additional sign with restriction
% Vehicles with a standard Instrument Display: a
+ symbol ne
xt to a traPc sign in the Instru-
ment Display indicates that additional traPc
signs have been detected. These can also be
displayed in the media display and optionally
in the head-up display. 256
Driving and parking

If TraPc
Sign Assist cannot determine the maxi-
mum permissible speed (e.g. due to missing
signs), the following display appears in the Instru-
ment Display: This is displayed continuously if the vehicle is in a
countr

y where TraPc Sign Assist is not supported.
TraPc Sign Assist is not available in all countries.
% Also observe the information on display mes-
sag
es in TraPc Sign Assist (  page 420).
Warning when approaching pedestrian crossings
(v
ehicles with Driving Assistance Package)
The system can warn you if you approach a
pedestrian crossing with your vehicle. The