MERCEDES-BENZ S CLASS 2023 Owners Manual

ØRed, "Oashing: prompt to the driver to
actively con"Nrm or transition from active to
passive status, system limit detected\bDuring the transition from active to passive
status, the Ø symbol is shown as enlarged
and "Oashing. Once the system is passive, the
Ø symbol is shown as gray in the driver\bs
display.
Contact detection
The driver is required to keep their hands on the steering wheel at all times and be able to inter-
vene at any time to correct the course of the vehi-
cle and keep it in lane. The driver must expect a change from active to passive mode or vice versaat any time.
If the system detects that the driver has not
steered the vehicle for a considerable period of time or has removed their hands from the steeringwheel, an optical warning is given "Nrst. Display 1
appears in the driver\bs display. If the driver still does not steer the vehicle, or gives no con"Nrma-
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 270).
The warning is not issued or is stopped as soon as
the system detects that the driver has touched
the steering wheel.
The touch detection may be limited or may not
function if there is no direct contact between the
hand and the steering wheel, e.g. when wearing
gloves or if 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 issuedand a warning tone sounds.
Observe the notes on driving systems and your
responsibility; you may otherwise fail to recognize dangers (  page 252).
System limits
Active Steering Assist has a limited steering tor-
que for lateral guidance. In some cases, the steer-
ing intervention is not su"Pcient 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 ambient light
or strong shadows on the road.
= There is glare, e.g. from oncoming tra"Pc,
direct sunlight or re"Oections.Driving and parking269

=*nsu"Pcient road illumination.
= The windshield is dirty, fogged 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
intersections.
= 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 very tight bends and when turning.
= When crossing intersections.
= At tra"Pc circles or toll stations.=
When actively changing lane without switching
on the turn signal indicator.
= When the tire pressure is too low.&WARNING Risk of accident if Active Steer-
ing Assist unexpectedly stops functioning
If the system limits of Active Steering Assist
are 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 observe the tra"Pc carefully.Always steer the vehicle paying attention
to tra"Pc conditions.&WARNING Risk of accident if Active Steer-
ing Assist unexpectedly intervenes
The detection of lane markings and objects
may malfunction and cause unexpected steer-
ing interventions.
Steer according to tra"Pc conditions.
qActivating/deactivating Active Steering Assist
Requirements
= ESP n
is activated, but is not intervening.
= Active Distance Assist DISTRONIC is activa-
ted.
Multimedia system: 4 © 5
Settings 5
Assistance
5 DrivingActivate or deactivate Active Steering Assist .
Function of Active Emergency Stop Assist
Active Emergency Stop Assist uses touch sensors
to monitor whether the driver holds the steering
wheel and initiates an emergency stop if neces-
sary.
If Active Steering Assist is deactivated, the accel-
erator and brake pedal are monitored as well as
the steering wheel. A warning is issued when the steering wheel is not being held or when a pedalis not depressed, and the vehicle is in danger of
leaving the lane.
270Driving and parking

If Active Steering Assist is switched o"M, the sys-
tem is available from a speed of approx. 37 mph (60 km/h).
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 Initiating 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.
Depending on the country, a lane change to the
adjacent right-hand lane is carried out, if possible.
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.
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 a"ser 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. A"ser 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 260)
= Active Steering Assist (  page 268)
= Active Lane Change Assist (  page 272)
Driving and parking271

=Active Brake Assist (  page 274)
Active Lane Change Assist

qFunction of Active Lane Change Assist
Active Lane Change Assist supports the driver during lanes changes and the driver can activate itby indicating brie"Oy.
Active Lane Change Assist is only an aid and not a substitute for your attention. It is essential thatyou observe the notes on driving systems and your responsibility in the vehicle Operator\bs Man-
ual; you may otherwise fail to recognize dangers.
The following conditions must be ful"Nlled for a
lane change:
= You are on a highway or high-speed major
road.
= The vehicle speed is between approximately
50 mph (80 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.
= 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 highways.
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 you entered the highway.
= The system brie"Oy does not detect the road
you are on as a highway or a highway-like
road, e.g. at a highway intersection.
As soon as Active Lane Change Assist detects a suitable road, you can reactivate it with J,
M or N .Driver display on the $ssLstDnFH menu1Green arrow: lane change initiated2Red arrow: lane change canceled
When Active Lane Change Assist is available, the
± display will appear along with green arrows
on the driver display. If the system has been acti-
vated but is not currently available, the ± dis-
272Driving and parking

play will appear along with grey arrows on the
driver display.
If no vehicle or obstacle is detected in the adja- cent lane and a lane change is permitted, the lane change will begin a"ser the driver has indicated
brie"Oy. The lane change will be shown to the
driver with a "Oashing green arrow next to the
± steering wheel symbol. Green arrow 1 will
be displayed in the appropriate adjacent lane on
the Assistance menu on the driver\bs display. The
Lane Change to the Left message, for example,
will also appear.
Active Lane Change Assist can be canceled in var- ious situations, including the following:
= Change in the surrounding conditions (e.g.
detected obstacle).
= The driver removes both hands from the steer-
ing wheel.
= The driver steers with too much force or in the
opposite direction.
= The driver activates the turn signal indicator in
the opposite direction.= Active Distance Assist DISTRONIC or Active
Steering Assist is deactivated.
= The vehicle 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 appears on the
driver display.
= In certain circumstances, a warning tone will
sound.&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 although
the 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 tra"Pc conditions and steer
and/or brake if necessary.
System limits
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 ambient light
or shadows on the road.
= There is glare, e.g. from oncoming tra"Pc,
direct sunlight or re"Oections.
Driving and parking273

=Due to insu"Pcient illumination of the road, or
if the exterior lighting indicates a malfunction.
= The windshield is dirty, fogged up, damaged or
obscured in the vicinity of the camera, e.g. by a sticker.
= The sensors are damaged, obscured or dirty.
= The lane markings for one lane are either
absent or unclear, or the markings change
quickly, such as in a construction area or at
intersections.
= The system does not detect a suitable road,
for example, on tight bends or shortly a"ser a
on/o"M ramp.
= The lane markings are worn away, dark or cov-
ered up, e.g. by dirt or snow.
= The distance to the vehicle in front is too short
and thus the lane markings cannot be detec-
ted.
= There are obstacles on the lane or projecting
out into the lane, such as object markers.
= The tire pressure is too low.Also observe the system limits of Active Steering
Assist and the information on vehicle sensors and
cameras in the vehicle Operator\bs Manual.\bThe Active Lane Change Assist sensors will
adjust automatically while a certain distance
is being driven a"ser the vehicle has been
delivered. Active Lane Change Assist will be
unavailable or only partially available during
this teach-in process, and no arrows will be
displayed next to the Ø Active Steering
Assist symbol.

q Setting Active Lane Change Assist
Multimedia system: 4 © 5
Settings 5
Assistance
5 Driving
5 Aktiver Spurwechsel-Assistent (Active Lane
Change Assist)
Select Aktiver Spurwechsel-Assistent (Active
Lane Change Assist).Choose between the On, Also Automatically
and Off (O"M) setting options.
The Also Automatically setting option can also be
switched on and o"M on the quick-access menu.
\bIf Active Steering Assist has been switched
o"M, it will not be possible to operate 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 brake force boosting
= Evasive Steering Assist (country-speci"Nc)
Active Brake Assist can help you to minimize the
risk of a collision with vehicles, cyclists or pedes- trians or to reduce the e"Mects of such a collision.
If Active Brake Assist has detected a risk of colli- sion, a warning tone will sound and the / dis-
tance warning lamp will light up.
274Driving and parking

On the Assistance menu, an insu"Pcient distance
1 to the vehicle in front will be displayed in red.
If you further reduce the distance, the vehicle in front will also be highlighted in red. When the sys-tem detects a risk of collision, red radar waves 2
will appear in front of the vehicle.
\bVehicles with PRE-SAFE n
: depending on the
country, an additional haptic warning will occur in the form of slight, repeated tension-ing of the seat belt.\bVehicles with active ambient lighting: if Warn-
ing Support is activated, the Active Brake
Assist warning will also be accompanied by
ambient lighting (  page 174).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 tone and the
/ distance warning lamp will occur at the
same time as brake application.
If you apply the brake yourself in a critical situa-
tion or apply the brake during autonomous brak-
ing, situation-dependent brake force boosting will
occur. The brake pressure will increase up to max-
imum full-stop braking if necessary.
If autonomous braking or situation-dependent
brake force boosting has occurred, pop up 1 will
appear on the driver\bs display and then automati-
cally disappear a"ser a short time.
If the autonomous braking function or the situa- tion-dependent brake force boosting 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 tra"Pc 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 su"Pciently safe
distance to the vehicle in front, vehicle speed and for braking in good time.
Always pay careful attention to the tra"Pc
situation; do not rely on Active Brake
Assist alone.Driving and parking275

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 Active Brake
Assist warning lamp will appear on the driver\bs
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 to approximately 43 mph
(70 km/h) when approaching stationary
pedestrians and cyclists
Canceling brake application by Active Brake Assist
You can cancel brake application by Active Brake
Assist at any time by:
= Fully depressing the accelerator pedal or acti-
vating kickdown.
= Releasing the brake pedal.
Active Brake Assist may cancel brake application
when one of the following conditions is ful"Nlled:
= 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
Reaction to oncoming road users
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 via acoustic
warning and distance warning lamp /
= Autonomous brake 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 tra"Pc situations
clearly.
Moreover, the steering support provided by
Evasive Steering Assist is not su"Pcient to
avoid a collision.
Always pay careful attention to the tra"Pc
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
a swerving maneuver is detected.
= Activation by an abrupt steering movement
during a swerving maneuver.
= Assistance during swerving and straightening
of the vehicle.
= Reaction from a speed of approximately
13 mph (20 km/h) up to a speed of approx- imately 68 mph (110 km/h).
You can cancel assistance from Evasive Steering
Assist at any time by countersteering.
System limits
Full system performance will not be available for a short time a"ser you switch the vehicle on or a"ser
you drive o"M. As long as the functions are restric-
Driving and parking277

ted, the