MERCEDES-BENZ S CLASS 2023 Owners Manual

=The electric parking brake is released.
This gives you enough time to move your foot
from the brake pedal to the accelerator pedal and
depress it before the vehicle begins to roll away.&WARNING Risk of accident and injury due
to the vehicle rolling away
A"ser a short time, Hill Start Assist no longer
holds the vehicle.
Swi"sly move your foot from the brake
pedal to the accelerator pedal. Do not
leave the vehicle when it is being held by
Hill Start Assist.
ATTENTION ASSIST

q Function of ATTENTION ASSIST
ATTENTION ASSIST assists you on long, monoto-
nous journeys, e.g. on highways and trunk roads.
If indicators of fatigue or increasing lapses in con- centration on the part of the driver are detected,
the system suggests taking a break.
ATTENTION ASSIST is only an aid. It cannot
always detect fatigue or lapses in concentration in
time. The system is not a substitute for a well-res-
ted and attentive driver. On long journeys, take regular breaks in good time that allow for ade-
quate recuperation.
You can choose between two settings:
= Standard: normal system sensitivity.
= Sensitive: higher system sensitivity. The driver
is warned earlier and the attention level detec-
ted by ATTENTION ASSIST is adapted accord-
ingly.
If fatigue or increasing inattention is detected, the
warning appears in the driver display: ATTEN-
TION ASSIST: Take a Break! . you can acknowl-
edge the message and take a break if necessary. If you do not take a break and ATTENTION ASSIST
continues to detect increasing lapses in concen-
tration, you will be warned again a"ser a minimum
of 15 minutes.
If ATTENTION ASSIST is unable to calculate the
attention level and cannot issue a warning, the
System Suspended message appears.
If the driver display shows a warning, a service
area search is o"Mered in the multimedia system.You can select a rest area and start navigation to
this rest area.
When you restart the vehicle, ATTENTION ASSIST is automatically switched on. The last selected
sensitivity level remains stored.
The following information is displayed in the driv-
er\bs display:
= The length of the journey since the last break
= The attention level determined by ATTENTION
ASSIST:
- The more segments 1 of the circle dis-
played, the higher the detected attention level.
Driving and parking259

-Fewer segments 1 are displayed in the
circle as the attention level decreases.
System limits
ATTENTION ASSIST is active in the 37 mph
(60 km/h) to 124 mph (200 km/h) speed range.
The microsleep detection function is available at a
speed of 12 mph (20 km/h) and above.
If the system is not available due to an error, the
ATTENTION ASSIST warning light is permanently
lit Û in the driver display
Particularly in the following situations, ATTENTION
ASSIST functions only in a restricted manner and warnings may be delayed or not occur:
= If you have been driving for less than approx-
imately 30 minutes.
= If the road condition is poor (uneven road sur-
face or potholes).
= If there is a strong side wind.
= If you adopt a sporty driving style (high corner-
ing speeds or high rates of acceleration).
= If the Steering Assist function of Active Dis-
tance Assist DISTRONIC is active.= If the clock is set to the incorrect time.
= If you change lanes and vary your speed fre-
quently in active driving situations.
= if ESP n
is not available
Also observe any information regarding display
messages that can be displayed in the driver\bs display.
The ATTENTION ASSIST drowsiness or alertness
assessment is reset and restarted when continu- ing the journey in the following situations:
= You switch o"M the vehicle.
= If you unfasten your seat belt and open the
driver\bs door (e.g. to change drivers or take abreak).

q Setting ATTENTION ASSIST
Multimedia system: 4 © 5
Settings 5
Assistance
5 Assistance 5
ATTENTION ASSIST
Setting the sensitivitySelect = next to ATTENTION ASSIST .Select Standard or Sensitive .Active Distance Assist DISTRONIC

qFunction of Active Distance Assist DISTRONIC
DISTRONIC Active Distance Assist maintains the
set speed on free-"Oowing roads. If vehicles are
detected ahead, the set distance will be main- tained, until the vehicle comes to a standstill if
necessary. The vehicle will accelerate or brake
depending on the distance to the vehicle in front and the set speed. The speed and distance to thevehicle in front are set and saved using the steer-ing wheel.
Available speed range: = Vehicles without Driving Assistance Package:
15 mph (20 km/h) - 100 mph (160 km/h)
= Vehicles with Driving Assistance Package:
15 mph (20 km/h) - 130 mph (210 km/h)
\bThe adjustable set speed may di"Mer if a limit
speed (e.g. winter tire limit) is stored.
Other features of Active Distance Assist
DISTRONIC:
= Adjusts the driving style depending on the
selected drive program (energy-saving, com-fortable or dynamic) (  page 218)
260Driving and parking

=Initiates acceleration to the stored speed if the
turn signal indicator is switched on to change
to the overtaking lane
= Vehicles with Driving Assistance Package:
- Reacts to stationary vehicles detected in
urban speed ranges (except bicycles and
motorcycles)
- Takes one-sided overtaking restrictions
into account on highways or on multi-lane
roads with separate roadways (country-
dependent)\bIt is possible to set the driving mode of Active Distance Assist DISTRONIC on the DYNAMICSELECT menu. Depending on which drive pro-gram is selected, the driving characteristicscan be geared towards energy economy, com-fort or dynamic performance. The driving style
can be permanently set to Comfort or
Dynamic on the Active Distance Assist menu (  page 267).
Vehicles with Active Parking Assist and Driving
Assistance Package: if Active Distance Assist
DISTRONIC has braked the vehicle to a standstill,
it can automatically follow the vehicle in front
when it drives o"M again within 30 seconds. If a
critical situation is detected in the surrounding area when the vehicle drives o"M, such as a person
in the path of the vehicle, a visual and acoustic warning will be given indicating that the driver
must now take control of the vehicle. The vehicle
will not be accelerated any further.
Observe the notes on driving systems and your
responsibility; you may otherwise fail to recognize
dangers (  page 252).
DISTRONIC Active Distance Assist maintains the
set speed on free-"Oowing roads. If vehicles are
detected ahead, the set distance will be main- tained, until the vehicle comes to a standstill if
necessary. The vehicle will accelerate or brake
depending on the distance to the vehicle in front and the set speed. The speed and distance to thevehicle in front are set and saved using the steer-ing wheel.
DISTRONIC Active Distance Assist is available in the speed range from 15 mph (20 km/h) - 130 mph (210 km/h).Other features of Active Distance Assist
DISTRONIC:
= Adjusts the driving style depending on the
selected drive program (fuel-saving, comforta-
ble or dynamic) (  page 218)
= Initiates acceleration to the stored speed if the
turn signal indicator is switched on to change
to the overtaking lane
= Reacts to stationary vehicles detected in
urban speed ranges (except bicycles and
motorcycles)
= Takes one-sided overtaking restrictions into
account on highways or on multi-lane roads with separate roadways (country-dependent)
Additional function available in certain countries:
if Active Distance Assist DISTRONIC has braked the vehicle to a standstill, it can automatically fol-
low the vehicle in front when it drives o"M again
within 30 seconds. If a critical situation is detec-
ted in the surrounding area when the vehicle
drives o"M, such as a person in the path of the
vehicle, a visual and acoustic warning will be given
indicating that the driver must now take control ofDriving and parking261

the vehicle. The vehicle will not be accelerated
any further.
Active Distance Assist DISTRONIC is ready to
drive when the green

=If there are narrow vehicles in front, such as
bicycles or motorcycles.
In addition, on slippery roads, braking or acceler- ating can cause one or several wheels to lose
traction and the vehicle could then skid.
Do not use Active Distance Assist DISTRONIC in these situations.&WARNING Risk of accident from accelera-
tion or braking by Active Distance Assist
DISTRONIC
Active Distance Assist DISTRONIC may accel-
erate or brake in the following cases, for
example:
= If the vehicle pulls away using Active Dis-
tance Assist DISTRONIC.
= If the stored speed is called up and is con-
siderably faster or slower than the cur-
rently driven speed.
= If Active Distance Assist DISTRONIC no
longer detects a vehicle in front or does
not react to relevant objects.
Always carefully observe the tra"Pc con-
ditions and be ready to brake at all
times.Take into account the tra"Pc situation
before calling up the stored speed.&WARNING Risk of accident due to insu"P-
cient deceleration by Active Distance
Assist DISTRONIC
Active Distance Assist DISTRONIC brakes your vehicle with up to 50% of the possible deceler-
ation. If this deceleration is not su"Pcient,
Active Distance Assist DISTRONIC alerts you with a visual and acoustic warning.
Adjust your speed and maintain a suita-
ble distance from the vehicle in front.Brake the vehicle yourself and/or take
evasive action.&WARNING Risk of accident if detection
function of Active Distance Assist DISTRONIC is impaired
Active Distance Assist DISTRONIC does not
react or has a limited reaction:
= when driving on a di"Merent lane or when
changing lanes
= to pedestrians, animals, bicycles or sta-
tionary vehicles, or unexpected obstacles
= to complex tra"Pc conditions
= to oncoming vehicles and crossing tra"Pc
As a result, Active Distance Assist DISTRONIC may neither give warnings nor intervene in
such situations.
Always observe the tra"Pc conditions
carefully and react accordingly.

q Operating Active Distance Assist DISTRONIC
Requirements
= The electric parking brake is released.
= ESP n
is activated and is not intervening.
Driving and parking263

=The transmission is in position [.
= All the doors are closed.
= Check of the radar sensor system has been
successfully completed.
= Snow chain mode is not active (  page 445).JAdopts the stored/detected speed

Adopting the limit speed shown in the driver\bs dis-playActivate the Active Distance AssistDISTRONIC: Press M, N or J .Accept the displayed speed limit: press J.
The limit speed displayed in the driver\bs dis-
play is adopted as the stored speed. The vehi-
cle adapts its speed to that of the vehicle in
front, but only up to the stored speed, or limits its speed accordingly.\bA speed limit shown in the driver display is
adopted only while the vehicle is in motion, not when stationary.
Pulling away with Active Distance Assist
DISTRONIC
Activate Active Distance Assist DISTRONIC and remove your foot from the brake pedal.Press J.
or
Depress the accelerator pedal brie"Oy and
"Nrmly.
The functions of Active Distance Assist
DISTRONIC continue to be carried out.Reducing or increasing the speci"Ned distance
from the vehicle in frontPress K.
The M display appears. The speci"Ned dis-
tance is reduced by one level.
If the lowest level is already selected, the
selection jumps to the highest level.
Deactivating Active Distance Assist DISTRONIC
&WARNING Risk of an accident due to
Active Distance Assist DISTRONIC being
active when you leave the driver\bs seat
If you leave the driver\bs seat while the vehicle
is being braked by Active Distance Assist
DISTRONIC only, the vehicle can roll away.
Always deactivate Active Distance Assist
DISTRONIC and secure the vehicle to
prevent it from rolling away before you
leave the driver\bs seat.Press

If Active Distance Assist DISTRONIC has been put
into passive mode by pressing the accelerator pedal, only speed limits which are higher than theset speed are adopted.
The maximum permissible speed does not take
the road condition and current weather and tra"Pc
conditions into account. Adjust your speed accordingly, when necessary.
Observe the notes on driving systems and yourresponsibility; you may otherwise fail to recognizedangers (  page 252).
System limits
The system limits of Tra"Pc Sign Assist apply to
the detection of tra"Pc signs (  page 278).
Speed limits below 12 mph (20 km/h) are not automatically adopted by the system as the stored speed. Temporary speed restrictions (e.g. for a
certain time or due to weather conditions) cannot
be properly detected by the system.
Adjust the speed in these situations.&WARNING Risk of accident due to Active
Speed Limit Assist adapting the vehicle\bs speed
The speed adopted by Active Speed Limit
Assist may be too high or incorrect in some
individual cases, such as:
= at speed limits below 12 mph (20 km/h)
= in wet conditions or in fog
= when towing a trailer
Ensure that the driven speed complies
with tra"Pc regulations.Adjust the driving speed to suit current
tra"Pc and weather conditions.

qFunction of route-based speed adaptation
When Active Distance Assist DISTRONIC is activa-
ted, the vehicle speed will be adapted accordingly
to the route events ahead. Depending on the drive program selected, the vehicle negotiates a routeevent ahead in an energy-saving, comfortable or
dynamic manner. When the route event has been
passed, the vehicle accelerates again to the stored speed. The set distance to the vehicle in
front, vehicles detected ahead and speed restric-
tions ahead are taken into account.
Route-based speed adaptation can be activated in
the multimedia system (  page 267).
The following route events are taken into account: = Bends
= Tra"Pc circles
= T-intersections
= Turns and exits
= Tra"Pc jams ahead (only with Live Tra"Pc )
Also, the speed is reduced if the turn signal indi- cator is switched on and one of the following sit-
uations is detected:
= Turning at intersections
= Driving in slowing-down lanes
= Driving in lanes adjacent to slowing-down
lanes
The driver is responsible for choosing the right
speed and observing other road users. This applies in particular to intersections, tra"Pc circles266Driving and parking

and tra"Pc lights, as route-based speed adaptation
does not brake the vehicle to a standstill.
Speed adaptation is canceled in the following
cases:
= If the turn signal indicator is switched o"M
before the route event and it is therefore
assumed that the route event is not relevant
to the driver.
= If the driver depresses the accelerator or
brake pedal during the process.
System limits
Route-based speed adaptation does not take right
of way regulations into account. The driver is responsible for complying with road tra"Pc regula-
tions and driving at a suitable speed.
In di"Pcult conditions, the speed selection made
by the system may not always be suitable. This
applies to the following situations, forexample:
= The road\bs course is not clearly visible.
= Road narrowing.
= Varying maximum permissible speeds in indi-
vidual lanes, for example at toll stations.
= Wet road surfaces, snow or ice.In these situations the driver must intervene
accordingly.&WARNING Risk of accident in spite of
route-based speed adaptation
Route-based speed adaptation can malfunc-
tion or be temporarily unavailable in the fol-
lowing situations:
= If the driver does not follow the calculated
route
= If map data is not up-to-date or available
= In the event of roadworks
= In bad weather or road conditions
= If the accelerator pedal is depressed
= In the event of electronically displayed
speed limitations
Adapt the speed to the tra"Pc situation.
qSetting Active Distance Assist DISTRONIC driv-
ing styles
Requirements
= Active Distance Assist DISTRONIC is activa-
ted.
Multimedia system: 4 © 5
Settings 5
Assistance
5 Driving 5
Active Distance Assist
Selecting a driving styleSelect Based on DYNAMIC SELECT , Dynamic
or Comfortable .\bFurther information about Active Distance
Assist DISTRONIC (  page 263).
Setting speed adaptation
Select Adopt Speed Limit or Route-based
Speed .
When these functions are active, the vehicle speed is adjusted depending on a route event
ahead or a speed limit.Driving and parking267

\bWhen one of the following systems is active,
the detected speed can be manually adopted
as the speed limit:
= Active Distance Assist DISTRONIC
= Variable limiter\bFurther information on speed adaptation
(  page 266).

qFunction of Active Stop-and-Go Assist
Active Stop-and-Go Assist helps you when in traf- "Nc jams on multi-lane roads with separate road-
ways by automatically pulling away within up to
60 seconds and with moderate steering maneu-
vers. It orients itself using the vehicle in front and
lane markings. Active Stop-and-Go Assist auto-
matically maintains a safe distance from the vehi- cle in front and vehicles cutting in.
Active Stop-and-Go Assist requires you, as the driver, to keep your hands on the steering wheel
at all times so that you are able to intervene at any time to correct the course of the vehicle and
keep it in lane.
Observe the notes on driving systems and your responsibility; you may otherwise fail to recognize dangers (  page 252).
Active Stop-and-Go Assist activates automatically
when all of the following conditions are met:
= You are in a tra"Pc jam on a highway or high-
speed major road.
= Active Distance Assist DISTRONIC is activated
and active (  page 263).
= Active Steering Assist is activated and active
(  page 270).
= You are traveling no faster than 35 mph
(60 km/h).
When Active Stop-and-Go Assist is active the