MERCEDES-BENZ C-CLASS SALOON 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, an optical warning is given Nrst. Display 1
appears in the driver's display. If the driver still
does not steer the vehicle, or gives no conNrma-
tion to the system, a warning tone sounds in addi-
tion to the visual warning message.
If the driver does not react to this warning for a
considerable period, an emergency stop is initi-
ated (  page 249).
The warning is not issued or is stopped as soon as
the system detects that the driver has touched
the steering wheel. Touch detection may be limited or inoperative in
t
he following situations:
= The driver is wearing gloves.
= There is a steering wheel cover on the steering
wheel.
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 227).
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.
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 r
oad illumination.
= The windscreen 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.
= If transport equipment, forexample a trailer or
bicycle rack, is attached to the trailer hitch
and the electrical connection has been cor-
rectly established.
The system does not provide assistance in the fol-
lowing conditions: = On very tight bends and when turning. 248
Driving and parking

=
When cr ossing junctions.
= At roundabouts or toll stations.
= When actively changing lane without switching
on the turn signal indicator.
= When the tyre pressure is too low. &
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.
= Active Distance Assist DISTRONIC is activa-
ted.
Multimedia system: 4 © 5
Settings 5
Assistance
5 Driving 
Activate or deactivate Active Steering Assist . Function of Active Emergency Stop Assist
Active Emergency Stop Assist monitors the steer-
ing wheel and t

he accelerator and brake pedals. If
the system detects a lack of driver activity and the
vehicle threatens to leave the lane, a warning can
be issued and an emergency stop initiated.
Vehicles without Driving Assistance Package: The
system is available from a speed of approx.
60 km/h. Vehicles with Driving Assistance package:
If
A
ctive Steering Assist is switched oM, the system
is available from a speed of approx. 60 km/h.
If the system detects that the vehicle is threaten-
ing to leave the lane, a warning can be issued and
an emergency stop initiated.
= The driver does not touch the steering wheel
for a longer period of time or no steering
movement can be measured for a longer
period of time (depending on the vehicle
equipment).
= Neither the accelerator nor the brake pedal is
depressed.
% Vehicles with Driving Assistance package: if
A
ctive Steering Assist is switched on and
active, only the steering wheel is monitored by
the system. If the driver does not touch the
steering wheel for a longer period of time, a
warning may be given despite pedal actuation.
Also observe the instructions on the contact
detection of Active Steering Assist
(  page 247). Driving and parking
249

Active Emergency Stop Assist issues the following
w arnings in order:
= Display message 1 appears in the driver's
display.
= In addition to display 1 a warning tone
sounds.
= The message Beginning emergency stop will
appear in the driver's display, a continuous
warning tone will sound, the vehicle will no
longer accelerate and, if necessary, slight belt
tensioning will be produced.
= The vehicle speed is reduced in increments
until it is at a standstill. Sharp brake impulses
are also produced. %
Vehicles with Driving Assistance Package: If
A
ctive Distance Assist DISTRONIC is active
and the driver unfastens the seat belt and
driver's door, an emergency stop can be initi-
ated immediately.
Vehicles with Driving Assistance Package:
Depending on t
he country, a lane change to the
adjacent right-hand lane is carried out, if possible.
It is only possible to change across one lane and
only into the right-hand lane, and not onto the
hard shoulder.
When automatic braking is initiated, Active Dis-
tance Assist DISTRONIC is deactivated. Depend-
ing on the country, the hazard warning light sys-
tem is switched on.
When the vehicle is stationary, the following
actions are carried out:
= The vehicle is secured with the electric park-
ing brake.
= The vehicle is unlocked.
= If possible, an emergency call is placed to the
Mercedes-Benz emergency call centre. Before automatic braking is initiated, you can can-
cel A
ctive Emergency Stop Assist by steering.
You can cancel the intervention by Active Emer-
gency Stop Assist aser automatic braking is initi-
ated by one of the following actions:
= Accelerating or braking: the emergency stop is
cancelled, but the warning message, warning
tone and power steering remain active
= Steering: power-assisted steering is cancelled,
the warning message and warning tone remain
active and the vehicle continues to be braked
% Active Emergency Stop Assist can initiate an
emer
gency stop a maximum of three times
within a driving cycle. Aser that, Active Steer-
ing Assist and Active Emergency Stop Assist
are disabled until the vehicle has been restar-
ted.
System limits
F
or the detection of vehicles and other obstacles,
observe the system limits of the following func-
tions:
= Active Distance Assist DISTRONIC
( page 239) 250
Driving and parking

=
A ctive Steering Assist (  page 247)
= Active Lane Change Assist (  page 251)
= Active Brake Assist (  page 253)
Vehicles without Driving Assistance Package:
Active Emergency Stop Assist is inactive in the fol-
lowing cases:
= Active Lane Keeping Assist has reached a sys-
tem limit.
= Active Lane Keeping Assist is not operational
(grey status display) or deactivated (white sta-
tus display) (  page 266). Active Lane Change Assist
Function of Active Lane Change Assist
A

ctive Lane Change Assist supports the driver
when changing lanes and is activated by indicat-
ing brieOy.
For this, the following conditions must be fulNlled:
= You are on a motorway or high-speed major
road.
= The vehicle speed is between approximately
80 km/h and 180 km/h. =
The neighbour
ing lane is separated by a bro-
ken lane marking.
= No vehicle or obstacle is detected in the adja-
cent lane.
= Since the last time the vehicle was started,
the sensors have detected a vehicle at a suita-
ble distance behind your vehicle.
= Active Lane Change Assist is selected in the
multimedia system.
= Active Distance Assist DISTRONIC and Active
Steering Assist are activated on motorways.
The system is not available and must be reactiva-
ted in the following situations:
= Active Distance Assist DISTRONIC and Active
Steering Assist were already activated before
entering the motorway.
= The system brieOy does not detect the road
you are on as a motorway or a motorway-like
road, e.g. on a motorway junction.
As soon as Active Lane Change Assist detects a
suitable road, you can reactivate it with J,
M or N. Display in the driver's display in the
$ssLstDnFH
menu 1
Green arrow: lane change initiated
2 Red arrow: lane change cancelled
When Active Lane Change Assist is available, the
± displa
y appears along with green arrows in
the driver's display. If the system has been activa-
ted but is not currently available, the ± display Driving and parking
251

appears along with grey arrows in the driver's dis-
pla y.
If no vehicle or obstacle is detected in the adja-
cent lane and a lane change is permitted, the lane
change begins aser the driver has indicated
brieOy. The lane change is shown to the driver
with a Oashing green arrow next to the ±
steering wheel symbol. Green arrow Assistance is
displayed in the appropriate adjacent lane in the
1 menu in the driver's display. Themessage, for
Lane change to the left example, also appears.
Active Lane Change Assist can be cancelled in
various situations, including the following:
= Change in the surrounding conditions (e.g.
detected obstacle).
= The driver removes their hands from the steer-
ing wheel.
= The driver steers with too much force or in the
opposite direction.
= The driver moves the turn signal indicator in
the opposite direction.
= Active Distance Assist DISTRONIC or Active
Steering Assist is deactivated. =
The v ehicle cannot make the lane change as
planned.
Cancellation of Active Lane Change Assist is dis-
played as follows: = The arrow in the selected direction of travel
turns red.
= A corresponding message will also appear in
the driver's display.
= In certain circumstances a warning tone
sounds. &
WARNING Risk of accident when c
hanging
lane to an occupied adjacent lane
Lane Change Assist cannot always clearly
de
tect if the adjacent lane is free.
The lane change might be initiated although
the adjacent lane is not free. 
Before changing lanes, make sure that
t

he neighbouring lane is free and there is
no danger to other road users. 
Monitor the lane change. &
WARNING Risk of accident if Lane Chang
e
Assist unexpectedly stops functioning
If the system limitations for Lane Change
Assis
t have been reached, there is no guaran-
tee that the system will remain active.
Lane Change Assist cannot then assist you by
applying steering torque. 
Always monitor the lane change and
k

eep your hands on the steering wheel.
Observe the traPc conditions and steer
and/or brake if necessary. System limits
The sy

stem limitations of Active Steering Assist
apply to Active Lane Change Assist
(  page 247).
The system may also be impaired or may not func-
tion in the following situations:
= The sensors are damaged, covered or dirty
(  page 227).
= The exterior lighting shows a defect. 252
Driving and parking

=
The sy stem does not detect a suitable road,
forexample, in tight bends or shortly aser a
slip road.
= The vehicle is on a construction site.
% The Active Lane Change Assist sensors adjust
aut

omatically while a certain distance is being
driven aser the vehicle has been delivered.
Active Lane Change Assist is unavailable or
only partially available during this teach-in
process, and no arrows are displayed next to
the Ø Active Steering Assist symbol.
Observe the notes on driving systems and your
r
esponsibility; you may otherwise fail to recognise
dangers ( page 227).
Selecting Active Lane Change Assist
Multimedia system: 4 © 5
Settings 5
Assistance
5 Driving 
Select Aktiver Spurwechsel-Assistent (A
ctive
Lane Change Assist). Active Brake Assist
Function of Active Brake Assist
A

ctive Brake Assist consists of the following func-
tions:
= Distance warning function
= Collision warning
= Autonomous braking function
= Situation-dependent braking assistance
= Vehicles with Driving Assistance Package and
Active Steering Assist: Evasive Steering Assist
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 Assistance
menu, an insuPcient dis
tance
1 to the vehicle in front is displayed in red. If you
further reduce the distance, the vehicle in front is
also highlighted in red. When the system detects a
risk of collision, red radar waves 2 appear in
front of the vehicle.
% Vehicles with PRE-SAFE n
: depending on t
he
country, 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
br
aking can be initiated in critical situations.
In particularly critical situations, Active Brake
Assist can also initiate autonomous braking Driving and parking
253

directly. In this case, the warning lamp and warn-
ing t
one 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. If autonomous braking or situation-dependent
br

aking assistance has occurred, pop up 1
appears in the driver's display and then automati-
cally 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-
t
ection (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.
In such cases, Active Brake Assist might:
= Give 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 displa
y 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

intermittent warning tone and the / w
arning
lamp.
Vehicles without Driving Assistance Package:
= At speeds up to approximately 250 km/h
when approaching vehicles ahead.
= At speeds up to approximately 80 km/h when
approaching stationary vehicles, pedestrians
walking in the direction of travel and cyclists
ahead.
= At speeds up to approximately 70 km/h when
approaching crossing pedestrians and
cyclists.
= At speeds up to approximately 60 km/h when
approaching stationary pedestrians and
cyclists.
Vehicles with Driving Assistance Package: = At speeds up to approximately 250 km/h
when approaching vehicles ahead.
= At speeds up to approximately 120 km/h
when approaching crossing vehicles, pedes-
trians and cyclists.
= At speeds up to approximately 100 km/h
when approaching stationary vehicles. =
A t speeds up to approximately 80 km/h when
approaching cyclists ahead.
= At speeds up to approximately 70 km/h when
approaching stationary pedestrians and
cyclists.
Autonomous braking function
If the vehicle is travelling at speeds above approx-
imately 7 km/h, the autonomous braking function
may intervene in the following situations:
Vehicles without Driving Assistance Package: = At speeds up to approximately 250 km/h
when approaching vehicles ahead.
= At speeds up to approximately 80 km/h when
approaching cyclists ahead, pedestrians walk-
ing in the direction of travel and stationary
vehicles.
= At speeds up to approximately 70 km/h when
approaching crossing pedestrians and
cyclists.
Vehicles with Driving Assistance Package:
= At speeds up to approximately 250 km/h
when approaching vehicles ahead. =
A t speeds up to approximately 120 km/h
when approaching crossing vehicles, pedes-
trians and cyclists.
= 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 pedestrians and
cyclists.
Situation-dependent braking assistance
If the vehicle is travelling at speeds above approx-
imately 7 km/h, situation-dependent braking
assistance may intervene in the following situa-
tions.
Vehicles without Driving Assistance Package:
= At speeds up to approximately 250 km/h
when approaching vehicles ahead.
= At speeds up to approximately 80 km/h when
approaching cyclists ahead, pedestrians walk-
ing in the direction of travel and stationary
vehicles. Driving and parking
255

=
A t speeds up to approximately 70 km/h when
approaching crossing pedestrians and
cyclists.
= At speeds up to approximately 60 km/h when
approaching stationary pedestrians and
cyclists.
Vehicles with Driving Assistance Package: = At speeds up to approximately 250 km/h
when approaching vehicles ahead.
= At speeds up to approximately 120 km/h
when approaching crossing vehicles, pedes-
trians and cyclists.
= 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 pedestrians and
cyclists. Cancelling a brake application of Active Brake
Assis
t
You can cancel a brake application of Active
Brake Assist at any time by: = Fully 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.
Reaction to oncoming road users (only vehicles
with Driving Assistance Package)
Active Brake Assist can also react to detected
oncoming road users:
= Reaction up to speeds of approximately
100 km/h
= Warning for oncoming road users through
acoustic warning and warning lamp =
A utonomous braking application in order to
reduce the severity of an accident
Evasive Steering Assist &
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
Evasive 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. 256
Driving and parking

Evasive Steering Assist has the following charac-
t
eristics:
= Detection of pedestrians, cyclists and vehi-
cles.
= Assistance through power-assisted steering if
it detects a swerving manoeuvre.
= Activation 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
110 km/h.
The steering support of Evasive Steering Assist
can be cancelled at any time by counter steering.
System limits
Full system performance is not yet available for a
short time aser switching on the vehicle or aser
driving oM. As long as the functions are restricted,
the