Page 249 of 344

›Using the switch
on the lever, adjust the line 2 to the desired dis-
tance.
Note
■ If the proximity is changed in infotainment, the change will only come into
effect after a subsequent activation of the ACC.■
The higher the speed, the greater the proximity to the vehicle ahead.
■
The adjustment of the distance is stored (depending on Infotainment type) in
the active user account personalisation » page 50.
Special driving conditions
Fig. 307
Cornering / narrow vehicles or vehicles travelling side by side
Fig. 308
Lane changes of other vehicles / stationary vehicles
Read and observe
on page 243 first.
The following (and similar) situations require special attention and possibly the
intervention of the driver (braking, accelerating etc.).
When cornering
When driving into or driving out of long corners, it could be that a vehicle is
travelling in the adjacent lane and is scanned by the radar » Fig. 307 -
. The
host vehicle is then controlled according to this vehicle.
Narrow vehicles or vehicles travelling side by side
A narrow or offset vehicle driving can only be recognized by the ACC if this is
located in the scanning range of the radar » Fig. 307 -
.
Other vehicles changing lanes
Vehicles that change onto the lane with a small distance » Fig. 308 -
may
not be detected by ACC in good time.
Stationary vehicles
The ACC does not detect stationary objects! When a vehicle detected by the
ACC turns or sheers off and there is a stationary vehicle in front of this vehicle,
» Fig. 308 -
the ACC does not respond to the stationary vehicle.
Vehicles with special load or special body parts
Other vehicles with a load or with body parts protruding from the sides, back
or top of the vehicle contour may not be detected by the ACC.
Overtaking and towing
Read and observe
on page 243 first.
When overtaking
When your vehicle is being controlled at a speed that is lower than the set
speed and the turn signal is operated, ACC assesses this situation as meaning
that the driver wishes to overtake. The ACC automatically accelerates the vehi-
cle, thereby reducing the proximity to a vehicle ahead.
If your vehicle changes to the overtaking lane and no vehicle is detected
ahead, ACC accelerates until the set speed is reached and then keeps it con-
stant.
Acceleration can be cancelled at any time by touch on the brake pedal or
pressing the button on the lever
» Fig. 306 on page 245 .
Towing a trailer
When towing, or if another accessory is connected to the trailer socket, ACC
control is set with a lower rate. The manner of driving should therefore be
adapted to this limitation.
247Assist systems
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MalfunctionsRead and observe
on page 243 first.
If, for some unknown reason, ACC is not available, the warning light
appears
in the display of the instrument cluster and an appropriate message is shown.
Sensor covered / dirty
If the sensor cover or the sensor is dirty or covered, a message appears on the
instrument cluster display stating there is no sensor view. Clean the sensor
cover or remove the obstacles » Fig. 264 on page 215 .
If there is no sensor view in the winter, the snow on the sensor under the cov-
er could be the reason. The ACC is functional again after the snow melts away
from the sensor.
ACC not available
If the ACC is currently unavailable, a message concerning the unavailability ap-
pears. Stop the vehicle, switch off the engine and then start it again. If ACC
continues to be unavailable, seek the assistance of a specialist garage.
ACC fault
With an ACC fault, an error message appears. Seek help from a specialist ga-
rage.
Front Assist
Introduction
This chapter contains information on the following subjects:
Settings in Infotainment
248
Operation
248
Distance warning
249
Warning and automatic braking
249
Pedestrian recognition
250
Deactivation/activation
250
Malfunctions
251
The Front Assist (hereinafter referred to as the system) warns you of the dan-
ger of a collision with a vehicle or another obstacle in front of the vehicle, and
tries to avoid a collision or mitigate its consequences by automatically applying
the brakes where necessary.
The area in front of the vehicle is monitored by a radar sensor » page 215.WARNING■
Please take note of the general points relating to the use of assistance
systems » page 215, in section Introduction .■
The system does not respond vehicles that are crossing or oncoming.
CAUTION
In case of failure of more than one brake light on the vehicle or on the electri-
cally connected trailer, the system becomes unavailable.
Settings in Infotainment
Read and observe
and on page 248 first.
›
Press the button, then tap on the function surface
→
Driver assistance
.
■ Front Assist (ambient traffic monitor. sys.) - Set the assistant for distance
monitoring to the vehicles ahead ■
Active
- Activate/deactivate the assistant
■
Advance warning
(Version 1) - Activate/deactivate advance warning
■
Advance warning
(Version 2) - Activating/deactivating and setting the distance
level at which a warning occurs
■
Display distance warning
- Activate/deactivate distance warnings
Operation
Read and observe
and on page 248 first.
The system support is provided in the following manner.▶ Alerts you about a dangerous proximity to the vehicle ahead.
▶ Warns you of an impending collision.
▶ Assists with a brake action triggered by the driver.
▶ If the driver fails to respond to a detected danger, an automatic braking ac-
tion is performed.
The system can work only if the following basic conditions are met. The system is activated.
TCS is activated » page 217.
The vehicle is travelling forwards at a speed of more than approx. 5 km/h.
248Driving
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NoteThe system can be impaired or may not be available, for example when driving
in “sharp ”curves or with an ESC engagement » page 216.
Distance warning
Fig. 309
Display of the instrument cluster: distance warning
Read and observe and on page 248 first.
The display of the distance warning is for vehicles with MAXI DOT display.
If a safe distance from the vehicle ahead is fallen short of, the warning light
appears in the display
» Fig. 309 .
Immediately increase the proximity if the current traffic situation allows you
to do so!
The proximity at which the warning is displayed depends on the current speed.
The warning may occur when driving between about 60 km/h and 210 km/h.
Warning and automatic braking
Fig. 310
Instrument cluster display: Warning or emergency
braking at low speed
Read and observe and on page 248 first.
Emergency braking at low speed
If there is a risk of a collision in a vehicle speed range of about 5 km/h to 45 km/h, the system triggers an automatic braking.
With automatic braking, the warning light appears in the display
» Fig. 310 .
Advance warning
If the system detects a risk of collision, the warning light appears on the dis-
play
» Fig. 310 and an audible signal is emitted.
The pre-warning display can occur in the following situations.
▶ If there is a risk of collision with a moving obstacle at a driving speed range
of approx. 30 km/h to approx. 210 km/h.
▶ If there is a risk of collision with a stationary obstacle at a driving speed
range of approx. 30 km/h to approx. 85 km/h.
With a warning the brake pedal must be pressed or the moving obstacle is to
be avoided!
Acute alert
If the driver does not react to the advance warning when in danger of a colli-
sion with a moving obstacle, the system briefly applies the brake automatically
via an active brake intervention to draw attention to the potential danger of a
collision again.
Automatic Braking
If the driver does not respond to acute warning, the system begins to auto-
matically brake the vehicle.
If an automatic brake intervention is triggered by the system, the pressure in
the brake system increases and the brake pedal cannot be operated with the
normal pedal stroke.
The automatic braking interventions can be cancelled by pressing the acceler-
ator pedal or by means of a steering intervention.
Brake assist
If the driver brakes inadequate with an impending collision, the system auto-
matically increases braking force.
The braking assistance only occurs as long as the brake pedal is being firmly
pressed down.
249Assist systems
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Pedestrian recognitionRead and observe
and on page 248 first.
The pedestrian recognition can help to prevent accidents with crossing pedes-trians or to mitigate the consequences of an accident.
The system warns of an imminent collision, prepares the vehicle for an emer-
gency braking, supports during braking or performs an automatic braking.
Emergency braking at low speed
If there is a risk of collision in a vehicle speed range of about 5 km/h to 30
km/h, the system triggers an automatic braking.
With automatic braking, the warning light appears in the display
» Fig. 310
on page 249 .
Advance warning and automatic braking
If the system detects a risk of collision in a vehicle speed range of 30 km / h to 65 km / h, the warning light appears on the display
» Fig. 310 on page 249
and an audible signal is emitted.
With a warning the brake pedal must be pressed or the moving obstacle is to
be avoided!
If the driver does not respond to the advance warning, the system begins to
automatically brake the vehicle.
Deactivation/activation
Fig. 311
Keys / dial: on the operating lever / on the multifunction steering
wheel
Read and observe and on page 248 first.
The system is automatically activated each time the ignition is switched on.
The system should only be disabled in exceptional cases »
.
On vehicles with the MAXI DOT display, the system can be activated/deactiva- ted in the main menu » page 49, Menu item
Assist systems
.
Deactivation / activation in vehicles with segment display
Button
» Fig. 311ActionOperationAHold up / downShow Front Assist menu itemBPressDeactivate/activate system
Deactivation / activation in vehicles with multi-function steering wheel
Button / dial
» Fig. 311ActionOperation
CPressShow Front Assist menu itemDPressDeactivate/activate system
Disable / enable and setting in the Infotainment
In Infotainment, the entire system or the function advance warning and dis-
tance warning can be deactivated/activated » page 248, Settings in Infotain-
ment .
The distance-warning function was deactivated before the ignition was
switched off, it remains deactivated after the ignition is switched on again.
WARNINGIn the following situations, Front Assist should be switched off for safety
reasons.■
When the vehicle is being towed away.
■
When the vehicle is on a rolling test bench.
■
If an unfounded warning or a system action was taken.
■
When on a truck, or a car ferry service or similar.
250Driving
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MalfunctionsRead and observe
and on page 248 first.
If, for some unknown reason, the system is not available, an appropriate mes-
sage appears in the display of the instrument cluster.
Sensor covered / dirty
If the sensor cover or the sensor is dirty or covered, a message appears on the
instrument cluster display stating there is no sensor view. Clean the sensor
cover or remove the obstacles » Fig. 264 on page 215 .
If there is no sensor view in the winter, the snow on the sensor under the cov-
er could be the reason. The system is functional again after the snow melts
away from the sensor.
System unavailable
If the system is currently unavailable, a message concerning the unavailability
appears. Stop the vehicle, switch off the engine and then start it again. If the
system still is not available, seek the assistance of a specialist garage.
Select the driving mode (Driving Mode Selection)
Introduction
This chapter contains information on the following subjects:
Adaptive Chassis Control (DCC)
251
Mode
Eco251
Mode
Comfort252
Mode
normal252
Mode
Sports252
mode
individual252
Mode
Snow252
Mode selection and Infotainment display
252
Individual mode
settings253
By selecting the driving mode, the driving behaviour can be adapted to the de-
sired mode of operation.
The following modes
Eco
,
Comfort
,
Normal
,
Sport
,
Individual
and
Snow
are available.
The mode
Comfort
is only available on vehicles with adaptive chassis control
(DCC).
WARNINGPlease take note of the general points relating to the use of assistance
systems » page 215, in section Introduction .
Adaptive Chassis Control (DCC)
Read and observe
on page 251 first.
The adaptive chassis control (following known as DCC) provides the ability toadjust the shock characteristics for the sporty, normal or comfortable driving
when the corresponding control mode is selected.
The DCC evaluates steering response and road conditions while driving contin-
uously and adjusts the suspension behaviour within the selected driving mode
accordingly.
Mode
Eco
Read and observe on page 251 first.
This mode is suitable for a relaxed style of driving and helps to save fuel.
Selecting this mode primarily affects the function of the following systems.
Drive
Vehicle acceleration is more relaxed than in
Normal
mode.
The recommended gear is controlled such to achieve the lowest possible fuel
consumption » page 44.
If the START-STOP system is deactivated manually » page 205, this will be au-
tomatically activated.
The automatic gearbox is set automatically to mode E » page 210 .
Adaptive Cruise Control (ACC)
Acceleration occurs more relaxed than in
Normal
» page 243 mode with distance
control.
Headlights with LED lamps
The system is in economy mode » page 68. The headlamps are in basic setting
and do not adapt to the direction of travel.
251Assist systems
Page 254 of 344

Air conditioning (Climatronic)
The air conditioning is controlled so as to save energy. For this reason, for ex-
ample, it may take longer to reach the desired interior temperature in modeNormal
.
Note
■ If a trailer or other accessory is to be connected to the trailer socket, driving
mode Eco
is not available.■
The maximum vehicle acceleration (kick down function) is possible also in
driving mode
Eco
.
Mode
Comfort
Read and observe on page 251 first.
This mode is suitable for driving on roads with poorer surface or for long mo- torway journeys.
Mode
normal
Read and observe on page 251 first.
This mode is suitable for a conventional driving.
Mode
Sports
Read and observe on page 251 first.
This mode is suitable for a sporty driving.
Selecting this mode primarily affects the function of the following systems.
DCC
The DCC adjusts the chassis for the sporty driving style.
Steering
The power steering is reduced slightly, i.e., the driver needs to exert more
force for steering .
Drive
The vehicle acceleration is more dynamic than in
Normal
mode.
Adaptive Cruise Control (ACC)
The acceleration is quicker than in
Normal
mode with distance control
» page 243 .
Headlights with LED lamps
The headlamps adapt to the driving style more dynamically than in mode Nor-mal
» page 68 .
ProActive passenger protection
The first level of protection is deactivated » page 253.
mode
individual
Read and observe on page 251 first.
In the mode
Individual
each system can be set independently » page 253, Indi-
vidual mode
settings
.
Mode
Snow
Read and observe on page 251 first.
The mode is suitable for driving on slippery or snow-covered roads.
The driving profile
Snow
does not allow the automatic transmission to be set to
S mode.
Mode selection and Infotainment display
Fig. 312
Button for selecting the driving mode / Display in Infotainment
screen
Read and observe
on page 251 first.
Procedure for the selection of the driving mode
›
Press the
» Fig. 312 button.
In Infotainment screen, a running mode menu » Fig. 312 appears.
252Driving
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The mode is changed by repeatedly pressing the button or by tapping the
corresponding function surface on Infotainment screen.
If a driving mode other than Normal
is selected, then the symbol
illuminates
on the button.
If the mode
Sport
or
Individual
was set prior to the engine being switched off
(Drive - Sport), the drive changes to
Normal
mode after the engine is started. In
order to switch back to
Sport
, select mode
Sport
or
Individual
or set the selector
lever of the automatic transmission to mode S.
Sets the mode
Individual
and information on the setting of the currently se-
lected mode
Cancel the menu to select driving mode
Modes (the surface of the selected mode is shown in green)
Note
■ The currently selected running mode is displayed in the Infotainment in the
status bar of the main menu of the symbol .■
The selected driving mode and the setting of the mode
Individual
is stored in
the active user account personalisation » page 50.
■
If the driving mode menu is not operated within a few seconds, the Infotain-
ment switches to the last selected menu or switches off.
Individual mode
settings
Read and observe on page 251 first.
In the
Individual
mode, the following menu items can be set.
■
DCC:
- Set the shock characteristics
■
Steering:
- Set the power steering characteristics
■
Drive:
- set the drive characteristics
■
ACC:
- Set the vehicle acceleration when adaptive cruise control is activated
■
Dynamic Cornering lights:
- Setting the characteristic of the headlights with LED
lamps
■
Air conditioning:
- Set the Climatronic characteristics
■
Reset mode
- Setting for all menu items in the
Individual
mode to
Normal
■
Cancel
- Keep the current settings
■
Reset
- cancels all menu items in the
Normal
mode
ABCProactive passenger protection (Crew Protect Assist)
Introduction
This chapter contains information on the following subjects:
Function
253
ProActive passenger protection (following known as system) increases pas-
senger protection in the front seats in situations that could lead to vehicle im-
pact or overturning.
WARNINGPlease take note of the general points relating to the use of assistance
systems » page 215, in section Introduction .
Note
■
The system component service life is monitored electronically. Further infor-
mation » page 37 , Safety systems .■
If the front passenger front airbag is deactivated, the belt tensioning func-
tion for the front passenger seat is switched off.
Function
Read and observe
on page 253 first.
In critical driving situations (e.g. during emergency braking or a sudden changein direction), the following steps can be taken separately or combined in order
to reduce the risk of serious injury.
▶ The front passenger's and driver's seatbelts, if worn, are automatically ten-
sioned closely over the body.
▶ Opened door windows in the front doors are automatically closed up to a gap
of about 5 cm from the edge.
▶ The sliding/tilting roof is closed.
Once the critical driving situation has passed, the tension on the seatbelts will
be released again.
The system operates at two levels of protection.
The first level of protection
The system already intervenes in situations that may occur during dynamic
driving. As a result, this primarily helps to keep the driver and the passenger in
the correct seated position.
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The first protection level can be deactivated in one of the following ways.
▶ in the menu Infotainment
→ →
Driver assistance
.
▶ Deactivating the TCS » page 217.
▶ By selecting the driving mode
Sport
» page 252 .
Provided that the driving mode
Sport
is not selected, the system is activated
over the two levels of protection after switching the ignition off and on again.
The second level of protection
The system intervenes only if the situation is evaluated as critical, such as
when panic braking at high speeds.
This level of protection cannot be deactivated.
Vehicles with the Front Assist system
Using this information, a system intervention may also occur when there is the danger of a collision with an obstacle detected in front of the vehicle.
Spurhalteassistent (Lane Assist)
Introduction
Fig. 313
Sensor for Lane Assist
This chapter contains information on the following subjects:
Settings in Infotainment
254
Operation
255
Activation / deactivation
256
Malfunctions
256
The lane departure warning (following known as system) helps to keep the ve-
hicle between the boundary lines of a lane.
The system recognises the boundary lines of the lane using a sensor » Fig. 313.
When the vehicle approaches a detected line between lanes, the system
makes a light movement of the steering wheel in the opposite direction to the
boundary line. This corrective steering intervention can be manually overrid-
den at any time.WARNING■ Please take note of the general points relating to the use of assistance
systems » page 215, in section Introduction .■
Lane Assist can help you keep the vehicle within the lane. However, it
does not steer the vehicle for you. The driver retains full responsibility for
steering at all times.
■
Some objects or markings on the road can be recognised as the boundary
lines - an erroneous steering intervention may be the result.
WARNINGThe system may not be able to recognise the boundary line, or recognise it
incorrectly, for example, in the following situations.■
When visibility is poor, (e.g. fog, heavy rain, thick snowfall).
■
When driving in “sharp” bends.
■
The sensor is blinded by the sun or oncoming traffic.
■
The field of view of the sensor is limited by an obstacle or a preceding ve-
hicle.
CAUTION
Do not attach any stickers or similar objects in front of the sensor on the wind-
screen to avoid impairing the functions of the system.
Note
■ The system is designed for driving on motorways and roads with adequate
longitudinal markings.■
The system can detect both continuous and broken lines.
Settings in Infotainment
Read and observe
and on page 254 first.
›
Press the button, then tap on the function surface
→
Driver assistance
.
■ Lane Assist (lane departure warning sys.) - Settings for Lane Assist
■
Active
- Activate/deactivate the assistant
■
Adaptive lane guidance
- Activate/deactivate adaptive lane guidance
254Driving