MERCEDES-BENZ C CLASS 2023 Owners Manual

Press J.
The maximum permissible speed shown by the traPc sign is stored and the vehicle maintains
this speed.
Deactivating cruise control
Press

Display on the driver\bs display on the $ssLstDnFH
menu1Vehicle in front2Distance indicator3Set speciNed distance
A vehicle detected in front 1 will be highlighted
in green. It may also be in the lane to the les of
your vehicle in situations where it is not permitted
to overtake on the right, such as on highways.
Permanent status display =

&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 traPc con-
ditions and be ready to brake at all
times.Take into account the traPc situation
before calling up the stored speed.&WARNING Risk of accident due to insuP-
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 suPcient,
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 diMerent lane or when
changing lanes
= to pedestrians, animals, bicycles or sta-
tionary vehicles, or unexpected obstacles
= to complex traPc conditions
= to oncoming vehicles and crossing traPc
As a result, Active Distance Assist DISTRONIC may neither give warnings nor intervene in
such situations.Always observe the traPc 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.
= The transmission is in position [.
= All the doors are closed.
= Check of the radar sensor system has been
successfully completed.
Driving and parking191

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
only adopted while driving, not when station-
ary.
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 brieOy and
Nrmly.
The functions of Active Distance Assist
DISTRONIC continue to be carried out.Reducing or increasing the speciNed distance
from the vehicle in frontPress K.
The M display appears. The speciNed 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 traPc
conditions into account. Adjust your speed accordingly, when necessary.
Observe the notes on driving systems and yourresponsibility; you may otherwise fail to recognizedangers (  page 179).
System limits
The system limits of TraPc Sign Assist apply to
the detection of traPc signs (  page 207).
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. The maxi- mum permissible speed applying to a vehicle witha trailer is not 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 traPc regulations.Adjust the driving speed to suit current
traPc 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 a fuel-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 195).
The following route events are taken into account: = Bends
= TraPc circles
= T-intersections
= Turns and exits
= TraPc jams ahead (only with Live TraPc )
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 on slowing-down lanes
= Driving on 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, traPc circles
and traPc lights because route-based speed194Driving and parking

adaptation does not brake the vehicle to a stand-still.
If a corresponding route event is detected while
route guidance is active, the Nrst speed adjust-
ment is carried out automatically. If the turn signal
indicator is switched on, the selected route is conNrmed and further speed adjustment is activa-
ted.
Speed adaptation is canceled in the following
cases:
= If the turn signal indicator is switched oM
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 traPc regula-
tions and driving at a suitable speed.In diPcult conditions, the speed selection made
by the system may not always be suitable. This
applies to the following situations, forexample:
= the road\bs course not clearly visible
= Road narrowing
= varying maximum permissible speeds in indi-
vidual lanes, forexample 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 limitationsAdapt the speed to the traPc 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 style
Select Based on DYNAMIC SELECT , Dynamic
or Comfortable .\bFurther information about Active Distance
Assist DISTRONIC (  page 191).Driving and parking195

Setting speed adaptationSelect Route Based or Speed limit .
When these functions are active, the vehicle
speed is adjusted depending on the route
events ahead.\bWhen one of the following systems is active,
the detected speed can be manually adopted
as the speed limit:
= Active Distance Assist DISTRONIC
= Cruise control
= Variable limiter\bFurther information on speed adaptation
(  page 194).

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 thedriver, 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 179).
Active Stop-and-Go Assist activates automatically
when all of the following conditions are met:
= You are in a traPc jam on a freeway or high-
speed major road.
= Active Distance Assist DISTRONIC is activated
and active (  page 191).
= Active Steering Assist is activated and active
(  page 198).
= You are traveling no faster than 35 mph
(60 km/h).
When Active Stop-and-Go Assist is active the

Permanent status display in the driver\bs displayØGray: activated and passiveØGreen: activated and activeØRed, Oashing: prompt to the driver to
actively conNrm 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 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 198).
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 the following situations:
= The driver is wearing gloves.
= There is a steering hub cap 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 recognizedangers (  page 179).
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 ambient light
or strong shadows on the road.
= There is glare, e.g. from oncoming traPc,
direct sunlight or reOections.Driving and parking197

=*nsuPcient 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
at 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 traPc 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 traPc carefully.Always steer the vehicle paying attention
to traPc 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 traPc 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 monitors the steer-
ing wheel and the 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. 37 mph (60 km/h).
Vehicles with Driving Assistance package: If
Active Steering Assist is switched oM, the system
198Driving and parking