WARNING (Continued)■The ACC does not react when approaching a stationary obstacle, such as
traffic jams, vehicle breakdowns or vehicles waiting at a traffic light.■
The ACC does not respond to crossing or oncoming objects.
■
If the ACC does not decelerate fast enough, immediately apply the vehi-
cle's foot brake.
WARNINGFor safety reasons, do not use the ACC under the following conditions.■When driving in turning lanes, motorway exits or construction sites, to
avoid an unwanted acceleration to the stored speed.■
When visibility is poor, (e.g. fog, heavy rain, thick snowfall).
■
When road conditions are poor (e.g. ice, slippery road, gravel, dirt road).
■
When driving around “sharp” bends.
■
When riding on a steep gradient / high slope.
■
When driving through places where metal objects (such as metal build-
ings, railway tracks, etc.) can be found.
■
When driving through very divided and enclosed spaces (such as large-ca-
pacity garages, car ferries, tunnels and the like.).
Note
■ The ACC is designed primarily for use on motorways.■The ACC reduces the speed by automatically releasing the accelerator or by
means of a braking procedure as appropriate. If the brakes are used for an au-
tomatic speed reduction at any moments, then the brake light illuminates.■
In case of failure of more than one brake light on the vehicle or on the con-
nected trailer, the ACC becomes unavailable.
■
The control automatically cancels the engagement of the brake supportive
assistance systems (e.g. ESC) or when the maximum permitted engine speed is
exceeded.
OperationFig. 202
Instrument cluster display: Examples of ACC displays
Fig. 203
Instrument cluster display: Examples of ACC status displays
Read and observe
on page 163 first.
The ACC allows you to set a speed of 30 - 160 or 210 km / h (depending on
equipment) and the distance to the vehicle ahead in the range of a very short
to a very long distance.
The ACC adjusts the set speed with respect to the detected vehicle ahead,
thus maintaining the selected proximity.
The ACC can detect a vehicle that is up to approx. 150 m ahead using the radar
sensor.
ACC display » Fig. 202
Vehicle detected (control active).
Line showing the displacement of the distance when setting » page 167,
Set the clearance level .
12164Driving
Set distance to the vehicle ahead.
Vehicle detected (control deactivated).
ACC status indications » Fig. 203
Regulation is inactive (in the colour display the digits of speed limits is
shown in grey).
Regulation active - no vehicle detected (in the colour display the digits of
the speed limits are highlighted).
Regulation deactivated - no speed stored.
Regulation active - vehicle detected (in the colour display the digits of the
speed limits are highlighted).
Note to reduce speed
If the delay of the ACC is insufficient in relation to the vehicle in front, in the instrument cluster, the warning light lights up and the display shows the
following message.Apply the brake!
Regulation according to the vehicle in the adjacent lane
During regulation your vehicle may be regulated according to the vehicle in the adjacent lane.
This could occur at speeds above about 80 km / h when your vehicle is moving
faster than the vehicle in the adjacent lane on the driver's side. The display
shows the detected vehicle is in the adjacent lane.
Note
Some ACC notifications in the display of the instrument cluster may be hidden
by notifications for other functions. An ACC notification automatically appears
for a brief moment when there is a change in status of the ACC.
Automatic stop-start
Read and observe
on page 163 first.
Vehicles with an automatic transmission can decelerate to a standstill and
start moving again using the ACC.
Decelerate to a standstill
If a vehicle ahead decelerates to a standstill, the ACC will also decelerate your
vehicle to a standstill.
34Starting to drive again after a holding period
As soon as the vehicle ahead starts moving again after a holding period, your
vehicle will also move and the speed will continue to be regulated.
If the preceding vehicle starts moving again after a long break, then to contin-
ue the regulation press the accelerator pedal or lever to position
ad-
just » page 165 , Operation Overview .
Operation Overview
Fig. 204
Operating lever
Read and observe
on page 163 first.
Overview of ACC functions operated with the lever » Fig. 2041Activate ACC (regulation deactivated)2Start control (resume) / increase speed by 1 km/h at a time
(sprung position)3Interrupt control (sprung position)4Deactivate ACC5 Increase speed by 10 km/h at a time6 Decrease speed by 10 km/h at a timeA Set proximity levelBStart control (adopt current speed) / Reduce speed by 1 km/h at
a time
Note
If the lever is set » Fig. 204 from the position directly into the sprung posi-
tion, the current speed is stored and the control process is started.165Assist systems
Start controlRead and observe
on page 163 first.
Basic requirements for start of control The ACC is activated.
The TCS is activated » page 143, Braking and stabilisation systems .
On vehicles with a manual transmission , the second gear or higher must
be engaged.
On vehicles with an automatic transmission , the selector lever must be in
the D/S position or in the Tiptronic position.
On vehicles with a manual transmission , the current speed must be higher
than approx. 25 km/h.
The control be started with the key or by adjusting the lever
» Fig. 204 on page 165 into the sprung position.
Button
›
Press the button .
The ACC will adopt the current speed and execute control.
Lever position
›
Set the lever into the sprung position Set.
The ACC will adopt the current speed and execute control. Should the speed be stored already, the ACC adopts this speed and executes control.
The warning light illuminates in the instrument cluster when the regulation
is switched on.
Note
■ If control is started at a speed of less than 30 km/h on vehicles with an auto-
matic transmission, the speed of 30 km/h is stored. The speed increases auto-
matically to 30 km/h or is regulated with respect to the speed of the vehicle
ahead.■
When TCS is disabled, it will be activated automatically upon starting control.
■
If the TCS is deactivated during control, control is stopped automatically.
Stop/resume control
Read and observe
on page 163 first.
Stop control
›
Set the lever into the sprung position
» Fig. 204 on page 165 Set.
Or
›
Apply the brake.
Control stops, the speed remains stored.
Resume control
›
Start control » page 166.
WARNINGControl may only be resumed if the stored speed is not too high for the cur-
rent traffic conditions.
Note
Regulation is also stopped when the clutch is held down for longer than 30 s.
Set/change the desired speed
Read and observe
on page 163 first.
The desired speed can be set or changed using the control lever » Fig. 204 on
page 165 .
The set speed is stored upon releasing the lever or the button on the button
on the lever.
Setting/changing the speed by 10 km/h at a time (
) - requirements
The ACC is activated.
Increasing the speed by 1 km/h at a time (
) - requirements
The ACC is activated.
The vehicle is controlled.
Decreasing the speed by 1 km/h at a time (
) - requirements
The ACC is activated.
The vehicle is controlled.
166Driving
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 143.WARNING■
Please take note of the general points relating to the use of assistance
systems » page 142, in section Introduction .■
The system does not respond to crossing or oncoming objects.
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.
Operation
Read and observe
and on page 169 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.
▶ Prepares the brakes for emergency braking prior to a detected danger.
▶ 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.
The TCS is activated » page 143, Braking and stabilisation systems .
The vehicle is moving forwards at a speed of more than approx. 5 km/h.
Note
The system can be impaired or may not be available, for example when driving
in “sharp ”curves or with an ESC engagement » page 144.Distance warning (dangerous distance)Fig. 207
Symbols in the instrument cluster: Note (dangerous
proximity)
Read and observe and on page 169 first.
The display of the distance warning is for vehicles with MAXI DOT display.
If a safe interval to the vehicle ahead falls below a minimum the display of the
instrument cluster shows the symbol
» Fig. 207 .
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. 208
Symbols in the instrument cluster: Warning or emer-
gency braking at low speed
Read and observe and on page 169 first.
Emergency braking at low speed
In a driving speed range of about 5 km/h to about 30 km/h the automatic brak- ing action is not preceded by a warning. With an immediate impact hazard au-
tomatic braking is done with the breaking force increasing in stages.
169Assist systems
Normal
Read and observe on page 171 first.
This mode is suitable for a conventional driving.
Sport
mode
Read and observe
on page 171 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 .
Engine / 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 163 .
Xenon headlight
The headlamps adapt to the driving style more dynamically than in mode
Nor-mal
» page 69 .
ProActive passenger protection
The first level of protection is deactivated » page 173.
Eco
mode
Read and observe
on page 171 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.
Engine / drive
Vehicle acceleration is more relaxed than in
Normal
mode.
The recommended gear is controlled such to achieve the lowest possible fuel
consumption » page 42.
When the START-STOP system was deactivated manually » page 130, it is au-
tomatically activated.
The automatic gearbox is set automatically to mode E » page 135 .
Adaptive Cruise Control (ACC)
Acceleration occurs more relaxed than in Normal
» page 163 mode with distance
control.
Xenon headlight
The system is in economic mode » page 69. The headlamps are in basic setting
and do not adapt to the direction of travel.
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 mode
Normal
.
Note
■ The mode Eco is not available when towing a trailer or when another acces-
sory is connected to the trailer socket. If the vehicle is in drive mode Eco
and a
trailer is hitched up or another accessory is connected, the vehicle is automati-
cally set to the driving mode
Normal
.
■
The maximum vehicle acceleration (kick down function) is possible also in
driving mode
Eco
.
Individual
mode
Read and observe
on page 171 first.
In the mode
Individual
each system can be set independently » page 173, Mode
settings
Individual
.
172Driving
Mode selection and Infotainment displayFig. 210
Button for selecting the driving mode / Display in Infotainment
display
Read and observe
on page 171 first.
Procedure for the selection of the driving mode
›
Press the symbol key
» Fig. 210 .
In the Infotainment display a running mode menu » Fig. 210 appears.
The mode is changed by repeatedly pressing the symbol key or by pressing
the corresponding function key in the Infotainment display.
If a driving mode other than
Normal
is selected, then the symbol illuminates
on the button.
Function buttons on the display » Fig. 210
Sets the mode
Individual
and information on the setting of the currently se-
lected mode.
Cancel the menu to select driving mode.
Modes (for the selected mode the button 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 .■
If the driving mode menu is not operated within a few seconds, the Infotain-
ment switches to the last selected menu or switches off.
ABCMode settingsIndividual
Read and observe on page 171 first.
In mode
Individual
the vehicle systems can be set as follows.
■
DCC:
- Set the shock characteristics
■
Comfort
- Comfortable
■
Normal
- Normal
■
Sport
- Sports
■
Steering:
- Set the power steering characteristics
■
Normal
- Normal
■
Sport
- Sports
■
Engine:
/
Drive:
- Sets the engine characteristic (vehicles with manual transmis-
sion) / drive characteristic (vehicles with automatic transmission)
■
Normal
- Normal
■
Sport
- Sports
■
Eco
- Economical
■
ACC:
- Set the vehicle acceleration when adaptive cruise control is activated
■
Normal
- Normal
■
Sport
- Sports
■
Eco
- Economical
■
Dynamic cornering light:
- Set the characteristics of the xenon headlights
■
Normal
- Normal
■
Sport
- Sports
■
Eco
- Economical
■
Air conditioning:
- Set the Climatronic characteristics
■
Normal
- Normal
■
Eco
- Economical
■
Reset mode
- Setting for all menu items in the
Individual
mode to
Normal
■
Cancel
- Keep the current settings
■
Reset
- Set all menu items to
Normal
Proactive passenger protection (Crew Protect Assist)
Introduction
This chapter contains information on the following subjects:
Function
174
173Assist systems
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 142, 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 on the road may be incorrectly detected as lines. As a re-
sult, an incorrect steering intervention may take place.
WARNINGThe detection capability of the camera may be limited by various external
influences. In such cases, the assistant may not detect the line between
two lanes at all or not properly. The detection capability of the camera may
be restricted in the following situations, for example.■
When visibility is poor, (e.g. fog, heavy rain, thick snowfall).
■
When driving around “sharp” bends.
■
The camera is blinded by the sun.
■
The camera is blinded by the oncoming traffic.
■
The viewing range of the camera is impeded by a vehicle travelling ahead.
■
The camera viewing range is obstructed by an obstacle.
CAUTION
Do not attach any stickers or similar objects to the windscreen to avoid impair-
ing the functions of the systems.
Note
■ The system is designed for driving on motorways and roads with adequate
longitudinal markings.■
The system can detect both continuous and broken lines.
OperationFig. 212
Monochromatic display of the instrument cluster: Examples of
system indications
Fig. 213
Colour display of the instrument cluster: Examples of system in-
dications
Read and observe
and on page 175 first.
System Indicators » Fig. 212 and » Fig. 213
The system is active, but not ready to intervene.
The system is active and ready to intervene.
The system intervenes when approaching the right-hand boundary lane.
Adaptive lane assist ensues (boundary lines on both sides of the vehicle
detected).
175Assist systems
The system can intervene when the following basic conditions are present.The system is activated.
The vehicle is travelling at more than about 65 km/h 1)
.
The boundary lines are clearly visible (appropriate longitudinal markings).
The boundary line of at least one side of the lane is detected.
The driver's hands are on the steering wheel.
The lane is more than 2.5 m in width.
If the turn signal is switched on prior to driving over the boundary line (e.g.
when making a turn), no steering intervention takes place when the vehicle
approaches the boundary line. The system regards the situation as an inten-
ded lane change.
Warning lights in the instrument clusterWarning lightMeaningThe system is active, but not ready to intervene.The system is active and ready to intervene or is currently
intervening.
Adaptive lane assist
Adaptive lane assist helps to keep the vehicle in the position between the
boundary lines selected by the driver, by means of steering intervention.
If the system detects only one boundary line, it will help to maintain the selec-
ted proximity from said boundary line.
If the proximity to the detected boundary line is changed, the system quickly
adapts and maintains the newly-selected position.
WARNINGThe system function may be restricted if, for example there is danger due
to ruts on a downhill road or in a crosswind.Activation / deactivation
Read and observe
and on page 175 first.
The activation or deactivation of the system can be carried out in one of twoways. ▶ In the instrument cluster display » page 48, Menu item
Assist systems
.
▶ Infotainment » Owner´s Manual Infotainment , chapter CAR - vehicle set-
tings .
Adaptive tracking can also be enabled or disabled In Infotainment.
After switching off and switching on the ignition, the system setting is re-
tained.
Information messages
Read and observe
and on page 175 first.
The warning symbols are shown in the instrument cluster display.
Lane Assist not available. No sensor view.
The windscreen is dirty, iced over or misted up in the camera viewing range.
Clean the windscreen or remove the obstacles.
Lane Assist currently not available.
The system has limited functionality due to a temporary error. Try to re-acti-
vate the machine.
Error: Lane Assist
System error detected. Seek help from a specialist garage.
Lane Assist: take over steering!
The system has detected that there are no hands on the steering wheel. In
this case the Assist system is not ready to intervene. Place your hands on the
steering wheel.
1)
Not valid for vehicles with the traffic jam assistant » page 179.
176Driving