MERCEDES-BENZ C CLASS 2023 Owners Manual

is available from a speed of approx. 37 mph
(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.\bVehicles with Driving Assistance package: if
Active 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 contactdetection of Active Steering Assist(  page 196).
Active Emergency Stop Assist issues the following
warnings in order:
= Display message 1 appears in the driver\bs
display.
= In addition to display 1 a warning tone
sounds.
= The message Beginning Emergency Stop will
appear in the driver\bs 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.
\bVehicles with Driving Assistance Package: If
Active Distance Assist DISTRONIC is active
and the driver unfastens the seat belt and driver\bs door, an emergency stop can be initi-
ated immediately.
Vehicles with Driving Assistance Package:
Depending on the 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 center.
Driving and parking199

Before automatic braking is initiated, you can can-
cel Active 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
canceled, but the warning message, warning
tone and power steering remain active
= Steering: power-assisted steering is canceled,
the warning message and warning tone remain
active and the vehicle continues to be braked\bActive Emergency Stop Assist can initiate an emergency 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
For the detection of vehicles and other obstacles,
observe the system limits of the following func-
tions:
= Active Distance Assist DISTRONIC
(  page 189)
=
Active Steering Assist (  page 196)
= Active Lane Change Assist (  page 200)
= Active Brake Assist (  page 202)
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
(gray status display) or deactivated (white sta-
tus display) (  page 217).
Active Lane Change Assist

qFunction of Active Lane Change Assist
Active 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 freeway or high-speed major
road.
= The vehicle speed is between approximately
45 mph (70 km/h) and 110 mph (180 km/h).
= The neighboring lane is separated by a broken
lane marking.
= No vehicle or obstacle is detected in the adja-
cent lane.
= Active Lane Change Assist is selected in the
multimedia system.
= Active Distance Assist DISTRONIC and Active
Steering Assist are switched on and active.200Driving and parking

Display in the driver\bs display in the $ssLstDnFH
menu1Green arrow: lane change initiated2Red arrow: lane change canceled
When Active Lane Change Assist is available, the

&WARNING Risk of accident when changing
lane to an occupied adjacent lane
Lane Change Assist cannot always clearly detect if the adjacent lane is free.
The lane change might be initiated althoughthe adjacent lane is not free.
Before changing lanes, make sure that
the neighboring lane is free and there is
no danger to other road users.Monitor the lane change.&WARNING Risk of accident if Lane Change
Assist unexpectedly stops functioning
If the system limitations for Lane Change
Assist 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
keep your hands on the steering wheel. Observe the traPc conditions and steer
and/or brake if necessary.System limits
The system limitations of Active Steering Assist
apply to Active Lane Change Assist (  page 196).
The system may also be impaired or may not func-
tion in the following situations:
= The sensors are damaged, covered or dirty
(  page 179).
= The exterior lighting shows a defect.
= The system does not detect a suitable road,
forexample, in tight bends.
= The vehicle is on a construction site.\bThe Active Lane Change Assist sensors adjust
automatically 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
responsibility; you may otherwise fail to recognizedangers (  page 179).

qSelecting Active Lane Change Assist
Multimedia system: 4 © 5
Settings 5
Assistance
5 DrivingSelect Aktiver Spurwechsel-Assistent (Active
Lane Change Assist).
Active Brake Assist

q Function of Active Brake Assist
Active Brake Assist consists of the following func-
tions:
= 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 minimize the risk of a collision with vehicles, cyclists or pedes-
trians or to reduce the eMects of such a collision.
202Driving and parking

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 distance
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.
\bVehicles with PRE-SAFE n
: depending on the
country, an additional haptic warning occurs in the form of slight, repeated tensioning ofthe seat belt.\bVehicles with active ambient lighting: if Warn-
ing Support is activated, the Active Brake
Assist warning is also accompanied by ambi-
ent lighting (  page 132).
If you do not react to the warning, autonomous
braking can be initiated in critical situations.
In particularly critical situations, Active Brake Assist can also initiate autonomous braking
directly. In this case, the warning lamp and warn-
ing 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.
If autonomous braking or situation-dependent
braking assistance has occurred, pop up 1
appears in the driver\bs 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-
tection (PRE-SAFE n
) may also be initiated.
&WARNING Risk of an accident caused by
limited detection performance of Active
Brake Assist
Active Brake Assist cannot always clearly iden-
tify objects and complex traPc situations.
Driving and parking203

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 traPc
situation; do not rely on Active Brake
Assist alone.Be prepared to brake or swerve if neces-
sary.
If Active Brake Assist is deactivated or the func- tions are restricted, e.g. due to activation ofanother driving system, the ê display message
appears in the driver\bs display.
If the system is unavailable due to dirty or dam-
aged sensors or due to a malfunction, or if the
functions are restricted, the

=at speeds up to approximately 43 mph
(70 km/h) when approaching crossing pedes- trians and cyclists
Vehicles with Driving Assistance Package: = at speeds up to approximately 155 mph
(250 km/h) when approaching vehicles ahead
= at speeds up to approximately 75 mph
(120 km/h) when approaching crossing vehi- cles, pedestrians and cyclists
= at speeds up to approximately 62 mph
(100 km/h) when approaching stationary
vehicles
= at speeds up to approximately 50 mph
(80 km/h) when approaching cyclists ahead
= at speeds up to approximately 43 mph
(70 km/h) when approaching stationary
pedestrians and cyclists
Situation-dependent braking assistance
If the vehicle is traveling at speeds above approx-
imately 4 mph (7 km/h), situation-dependent braking assistance may intervene in the followingsituations.Vehicles without Driving Assistance Package:
= at speeds up to approximately 155 mph
(250 km/h) when approaching vehicles ahead
= at speeds up to approximately 50 mph
(80 km/h) when approaching cyclists ahead,
pedestrians walking in the direction of travel
and stationary vehicles
= at speeds up to approximately 43 mph
(70 km/h) when approaching crossing pedes- trians and cyclists
= at speeds up to approximately 37 mph
(60 km/h) when approaching stationary
pedestrians and cyclists
Vehicles with Driving Assistance Package: = at speeds up to approximately 155 mph
(250 km/h) when approaching vehicles ahead
= at speeds up to approximately 75 mph
(120 km/h) when approaching crossing vehi- cles, pedestrians and cyclists
= at speeds up to approximately 62 mph
(100 km/h) when approaching stationary
vehicles= at speeds up to approximately 50 mph
(80 km/h) when approaching cyclists ahead
= at speeds up to approximately 43 mph
(70 km/h) when approaching stationary
pedestrians and cyclists
Canceling a brake application of Active Brake
Assist
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 maneuver to avoid the obstacle.
= There is no longer a risk of collision.
= An obstacle is no longer detected in front of
your vehicle.Driving and parking205

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
62 mph (100 km/h)
= Warning for oncoming road users through
acoustic warning and warning lamp
= Autonomous braking application in order to
reduce the severity of an accident
Evasive Steering Assist&WARNING Risk of accident despite Eva-
sive Steering Assist
Evasive Steering Assist cannot always recog-
nize objects or complex 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 traPc
situation; do not rely on Evasive Steering
Assist alone.Be prepared to brake or swerve if neces-
sary.End the support by actively steering in non-critical situations.Drive at an appropriate speed if there
are pedestrians close to the path of your
vehicle.
Evasive Steering Assist has the following charac-
teristics:
= Detection of pedestrians, cyclists and vehi-
cles.
= Assistance through power-assisted steering if
it detects a swerving maneuver.
= Activation by an abrupt steering movement
during a swerving maneuver.
= Assistance during swerving and straightening
of the vehicle.
= Reaction from a speed of approximately
12 mph (20 km/h) up to a speed of approx-
imately 68 mph (110 km/h).
The steering support of Evasive Steering Assist
can be canceled 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

=If a loss of tire pressure or a defective tire has
been detected and displayed.
= In complex traPc situations where objects
cannot always be clearly identiNed.
= If pedestrians, cyclists or vehicles move
quickly into the sensor detection range.
= If road users are hidden by other objects or
are located close to other objects.
= If the typical outline of a pedestrian or cyclist
cannot be distinguished from the background.
= If a pedestrian or cyclist is not detected as
such, e.g. due to special clothing or other objects.
= If the driver\bs seat belt is not fastened.
= On bends with a tight radius.

q Setting Active Brake Assist
Requirements = The vehicle is switched on.Multimedia system:
4 © 5
Settings 5
Assistance
5 Collision AvoidanceActivate or deactivate the function.\bIt is recommended that you always leave
Active Brake Assist activated.
When Active Brake Assist is deactivated, the dis- tance warning function, the collision warning, the autonomous braking function and Evasive Steer-ing Assist are deactivated.
\bIf Active Brake Assist is deactivated, the

limits have priority over traPc signs and speed
limits shown in the driver\bs display.
Also observe the following information:
= select a speed adapted to the traPc, sur-
roundings and weather conditions
= observe actual traPc signs
= observe applicable traPc rules and regula-
tions
Observe the notes on driving systems and your responsibility; you may otherwise fail to recognize dangers (  page 179).Displays in the driver\bs display1Permissible speed2Permissible speed when there is a restriction3Additional sign with restriction
The system can show up to two traPc signs in the
driver\bs display simultaneously. The system always prioritizes displaying speed limits. Up to one traf-
Nc sign with a maximum permissible speed can be
shown in the head-up display. If two speed signs are shown in the driver display, e.g. in the case of
detected restrictions, the value of the les-hand
speed limit 1 is always transmitted to the TEM-
POMAT or Active Distance Assist DISTRONIC for
acceptance and shown in the head-up display.
Examples of traPc signs which can be displayed
TraPc Sign Assist can detect and display following
traPc signs 1:
= speed limits
= end of the speed limit
= overtaking restrictions
= play streets
= recommended speeds
TraPc Sign Assist can detect following additional
signs 3 and, if necessary, analyze the relevance
of the restrictions using other vehicle sensors:
= when wet
208Driving and parking