
Traction control (TCS)136Electronic differential lock (EDL and XDS)137
Driver Steering Recommendation (DSR)
137
Brake Assist (HBA)
137
Hill Start Assist (HHC)
137
Multi collision brake (MCB)
138
Trailer stabilization system (TSA)
138
This chapter describes the functions of the brake and stabilization systems.
The error display is in Chapter » page 31, Warning lights .
The brake and stabilization systems are automatically activated each time the
ignition is switched on, unless otherwise indicated.
WARNINGThe general information relating to the use of assistance systems must be
observed » page 135, in section Introduction .
Stability Control (ESC)
Read and observe
on page 136 first.
The ESC improves vehicle stability in dynamic driving situations, such as when
the vehicle starts to skid.
The ESC monitors whether the desired direction of the current vehicle motion
is occurring. In case of any deviation (e.g. oversteer), the ESC automatically
brakes individual wheels to maintain the desired direction.
During an intervention of the system, the warning light flashes in the instru-
ment cluster.
Enable/disable ESC Sport
The activation of the ESC sports allows a sportier driving style. With a slight
over or under steering of the vehicle take no ESC interventions take place and
the TCS is restricted so that the spinning of the wheels of the driven axle can
occur.
The activation or deactivation of the ESC sports can be done in one of two
ways. ▶ By pressing the Symbol key for the activation and briefly pressing the but-
ton for the deactivation » Fig. 155 on page 136 .
▶ Infotainment » Owner´s Manual Infotainment , chapter CAR - vehicle set-
tings .
Upon activation, in the instrument cluster the indicator light comes on and
the display shows the following message.ESC sport: directional stabil. restricted.ESC SPORT
Upon deactivation, in the instrument cluster the control indicator
turns off
and the display shows the following message.
Stabilisation control (ESC) activated.ESC ON
Anti-lock braking system (ABS)
Read and observe
on page 136 first.
ABS prevents the wheels locking when braking. Thus helping the driver to
maintain control of the vehicle.
The intervention of the ABS is noticeable from the pulsating movements of
the brake pedal which is accompanied by noises.
When the ABS system is active, do not brake periodically or reduce the pres- sure on the brake pedal.
Traction control (TCS)
Fig. 155
System button: Vehicle with ESC / vehicle without ESC
Read and observe
on page 136 first.
TCS prevents the spinning of the wheels of the driven axle. TCS reduces the
drive power transmitted to the wheels in the case of slipping wheels. Thus, for
example, driving on road surfaces with low grip is made easier.
136Driving

During a TCS intervention, the indicator light flashes in the instrument clus-
ter.
Activating/deactivating TCS
The activation or deactivation of TCS can be done, depending on equipment, in
one of the following ways. ▶ Infotainment » Owner´s Manual Infotainment , chapter CAR - vehicle set-
tings .
▶ By briefly pressing the symbol key
» Fig. 155 .
▶ By briefly pressing the symbol key
» Fig. 155 .
Upon deactivation, in the instrument cluster the indicator light
lights up and
the display shows the following message.Traction control (ASR) deactivated.ASR OFF
Upon activation, in the instrument cluster the indicator turns and the display
shows the following message.
Traction control (ASR) activated.ASR ON
The TCS should normally always be enabled. The system should be deactivated
only in the following situations, for example. ▶ When driving with snow chains.
▶ When driving in deep snow or on a very loose surface.
▶ When it is necessary to “rock” a car free when it has become stuck.
Note
On vehicles without the ESC system, the warning light does not illuminate
upon deactivation of the TCS system, but a message is only displayed on the
display of the instrument cluster.
Electronic differential lock (EDL and XDS)
Read and observe
on page 136 first.
EDL
EDL prevents the turning of the respective wheel of the driven axle. EDL
brakes the spinning wheel, if necessary, and transmits the driving force to the
other driving wheel. Driving becomes easier on road surfaces with different
traction under each wheel of the driven axle.
EDL switches off automatically to avoid excessive heat generation on the
brake of the wheel being braked. Once the brakes have cooled down, there is
an automatic re-activation of EDL.
XDS
XDS is an extension to the electronic differential lock. XDS does not respond to
traction, but to the load relief of the inner front wheel of the driving axle dur-
ing fast cornering.
The automatic brake intervention on the brake of the wheel with reduced load
prevents the wheel from spinning. Thus, the traction is improved and the vehi-
cle can continue to follow the desired track.
Driver Steering Recommendation (DSR)
Read and observe
on page 136 first.
The DSR indicates to the driver in critical situations a steering recommenda-
tion in order to stabilise the vehicle. The DSR is activated, for example, on the
right and left vehicle side when braking sharply on different road surfaces.
Brake Assist (HBA)
Read and observe
on page 136 first.
HBA increases the braking effect and helps to shorten the braking distance.
The HBA is activated by the very quick operation of the brake pedal. To ach-
ieve the shortest possible braking distance, the brake pedal must be applied
firmly until the vehicle has come to a complete standstill.
The HBA is automatically switched off when the brake pedal is released.
Hill Start Assist (HHC)
Read and observe
on page 136 first.
HHC allows you, when driving on slopes, to move your foot from the brake
pedal to the accelerator pedal without having to use the handbrake.
The system holds the brake pressure produced by the activation of the brake pedal for approx. 2 seconds after the brake pedal is released.
The HHC is active from a 5% slope if the driver's door is closed. HHC is always
active on slopes when in forward or reverse start off.
137Assist systems

OperationFig. 156
Button for selecting the driving mode / function key in Infotain-
ment display
Read and observe
and on page 138 first.
We recommend that you activate the OFF ROAD mode for every trip on non-paved roads.
Activation
›
Press the symbol button
» Fig. 156 .
In the Infotainment display a running mode menu » Fig. 156 appears.
›
Press the function key
Off-road
in the Infotainment display.
Deactivation
›
Press the symbol button
» Fig. 156 .
›
In the Infotainment display select a driving mode other than
Off-road
.
So that an engagement of the OFF ROAD mode can take place, the following
conditions must be met.
The OFF ROAD mode is enabled.
The vehicle is moving at a speed of less than 30 km/h. The warning light illuminates in the instrument cluster.
The following functions are integrated in the OFF ROAD mode.
▶ Downhill Drive Support » page 139.
▶ ESC OFF ROAD » page 140.
▶ TCS OFF ROAD » page 140.
▶ EDL OFF ROAD » page 140.
▶ ABS OFF ROAD » page 140.
NoteIf the engine stalls while driving and is started again within 30 seconds, then
OFF ROAD mode will be automatically activated.
Hill Descent Assistant
Read and observe
and on page 138 first.
The hill descent assistant (hereinafter referred to as assist system), with its
automatic braking action on all wheels, ensures a constant speed is main-
tained on a steep slope when driving forwards and reversing.
During an intervention of the assistant, the warning light flashes in the in-
strument cluster.
The assistant is automatically engaged under the following conditions. The engine is running.
For vehicles with Manual transmission the shift lever is in the neutral po-
sition and or the 1st, 2nd, 3rd gear, or reverse gear is engaged.
On vehicles with an automatic transmission , the selector lever is in the R,
N, D/S position or in the Tiptronic position.
The downhill gradient is at least 10 % (when driving over sleepers, the lim-
it can briefly drop to 8 %).
Neither the accelerator nor the brake pedal is operated.
Driving speed
Initiate the downhill decent at a reasonable speed up to 30 km / h the hill de-
scent assist maintains this speed when driving downhill constant.
The assistant can maintain constant speed of about 2 - 30 km / h.
If a forwards or reverse gear is engaged for vehicles with Manual transmis-
sion , the speed must be high enough to avoid stalling the engine.
By pressing the accelerator or brake pedal, the speed can be increased or re-
duced. This is true even if the shift lever is in the neutral position and the se-
lector lever in the N position. The engagement of the assistant is resumed af-
ter the pedal is released.
WARNINGFor the correct operation of the assistant the road surface must be suffi-
ciently adherent. The assistant cannot properly fulfil its function on slushy
soil due to physical reasons (e.g. ice or mud). - there is a risk of an accident! 139Assist systems

The state in which the steering wheel is operated by the system, is referred to
as parking operation.
The Park Assist is an extension of the parking aid » page 140 and operates on
the basis of data collected by the ultrasonic sensors.
For this reason, the chapter on the parking aid is to be read carefully and the safety notes are to be observed.WARNING■ The general information relating to the use of assistance systems must
be observed » page 135, in section Introduction .■
During the parking process, the system automatically performs rapid
steering movements. While it is doing so, do not place your hands between
the steering wheel – risk of injury!
■
During a parking manoeuvre on loose or slippery surfaces (gravel, snow,
ice, etc.) you may stray from the calculated road. Therefore, do not use the
system in such situations.
CAUTION
The correct evaluation of the parking space and the parking procedure de-
pends on the circumference of the wheels on the vehicle.■
The system only works correctly if the vehicle is fitted with the wheel size
approved by the manufacturer.
■
Abstain from using the system when the vehicle is fitted with snow chains or
a temporary spare wheel.
■
If wheels other than those approved by the manufacturer are mounted, the
resulting position of the vehicle in the parking space can differ slightly. This
can be avoided by readjusting the system at a specialist garage.
CAUTION
If other vehicles are parked behind the kerb or on it, the system can also guide
your vehicle beyond the kerb or onto it. Ensure that the wheels or the wheel
rims of your vehicle are not damaged and if necessary intervene in time.
Note
■ We recommend performing the parking at a safe speed to about 5 km / h.■The driver can stop the parking process at any time by pressing the symbol
key
» Fig. 164 on page 146 or by a driver steering intervention.Functioning
Read and observe
and on page 145 first.
The system support is provided in the following manner.▶ While the parking space search is going on, a measurement and evaluation of
the parking space size is completed.
▶ Suitable parking spaces are shown in the display of the instrument cluster
(hereinafter only in the display).
▶ The display shows instructions and information before the start and during
the parking.
▶ The road way is calculated that the vehicle uses during the parking.
▶ The front wheels are automatically rotated during the parking.
Conditions for the system function
The system can look for a parking space only if the following basic conditions
are met.
The system is activated.
The vehicle speed is less than 40 km / h (parallel parking).
The vehicle speed is less than 20 km / h (transverse parking). The distance to a number of parked vehicles is approximately 0.5 - 1.5 m.
The TCS is activated » page 135, Braking and stabilisation systems .
The system can only carry out the parking if the following basic conditions are
met.
The vehicle is travelling less than about 7 km/h.
The parking procedure takes less than 6 minutes.
There is no driver intervention in the automatic steering operation.
Activation/deactivation
The system can be enabled or disabled by pressing the symbol key
» Fig. 164
on page 146 -
.
When the system is activated, the symbol illuminates.
145Assist systems

›Depress the brake pedal and wait until the steering wheel automatically ro-
tates into the required position, the symbol goes out.›
Carefully drive forwards.
›
If the backwards arrow is flashing in the display » Fig. 165 -
, select reverse
gear again or move the selector lever into position R .
The display shows the
icon (brake pedal).
›
Depress the brake pedal and wait until the steering wheel automatically ro-
tates into the required position, the symbol
goes out.
›
Carefully move backwards.
You can repeat these steps several times in succession.
As soon as the parking procedure is completed, an audible signal sounds and
the following message appears in the display:
Park Assist stopped. Take over steer-ing!
Departing from a parallel parking space
Read and observe
and on page 145 first.
The system supports the driver when leaving a parking space of a parallel
parking space.
Leaving a parking space process
›
Press the symbol button once
» Fig. 164 on page 146 .
The following message is displayed:
Park Assist: indicate and engage reverse!›
Activate the turn signal for side of the vehicle where the parking space is out
of which you wish to manoeuvre.
›
Select reverse gear or move the selector lever into position R.
The further procedure is analogous to that for reverse parking.
›
Follow the system instructions shown in the display.
As soon as the parking procedure is completed, an audible signal sounds and
the following message appears in the information display:
Please take over steer-ing and drive on.Automatic brake assist
Read and observe
and on page 145 first.
Automatic brake assist when speeding
If a velocity of 7 km / h is exceeded during the parking manoeuvre for the first
time, the speed will be automatically reduced by the system to less than 7 km /
h. This prevents the parking manoeuvre from aborting.
Automatic emergency braking
If the system detects a risk of collision during parking, automatic emergency
braking takes place to prevent a collision.
The parking is terminated by the emergency braking.
CAUTION
The automatic emergency braking is not triggered by the system when the
parking process stops due to the speed of 7 km/h being exceeded!
Information messages
Read and observe
and on page 145 first.
The information messages are shown in the instrument cluster display.
Park Assist stopped. Speed too high.
If a speed of 50 km / h is exceeded while searching for a parking space, the
system with the key symbol is must be reactivated.
Speed too high. Take over steering!
The parking is terminated if the speed exceeds 7 km / hr.
Park Assist stopped. Driver steer. intervent.
The parking procedure is terminated due to a driver steering intervention.
Park Assist stopped. ASR deactivated.
The parking procedure cannot be carried out because the TCS system is deac-
tivated » page 135 , Braking and stabilisation systems . Activate the TCS.
ASR deactivated. Take over steering!
The parking procedure was ended because TCS was deactivated during the
parking procedure.
Trailer: Park Assist stopped.
147Assist systems

Fig. 167
Segment display: Examples of status displays the CCS
Read and observe
on page 148 first.
CCS status displays » Fig. 166 , » Fig. 167
Speed is set, control is inactive (in the colour display the digits of speed
limits is shown in grey).
Control active (in the colour display the digits of the speed limits are high-
lighted).
No speed set.
System fault - seek assistance from a specialist garage immediately.
Basic requirements for start of control The CCS is activated.
On vehicles with manual transmission , second gear or higher is engaged.
On vehicles with an automatic transmission , the selector lever is in the
D/S position or in the Tiptronic position.
The current speed is higher than approx. 20 km/h.
This is only possible within the range which is permitted by the power output
and braking power of the engine.
WARNINGIf the engine power or engine braking effect is insufficient to maintain the
set speed, the driver must take control of vehicle operation.Operating DescriptionFig. 168
Cruise control system controls
Read and observe on page 148 first.
Overview of the control elements of the CCS » Fig. 168ADeactivate CCS (delete set speed) Interrupt control (sprung position) Activate CCS (control deactivated)BTake control again a)
/ Increase speedCLaunch control / reduce speeda)
If no speed is set, the current speed is used.
At the start of the control process, the CCS regulates the vehicle to the current
speed, and this speed is shown on the instrument cluster display. The warning
light illuminates in the instrument cluster.
Automatic control interruption
Automatic control interruption occurs if any of the following conditions are met. ▶ The brake pedal is operated.
▶ When one of the brake assist systems (e.g. ESC) intervenes.
▶ Through an airbag deployment.
WARNING■ Always deactivate the cruise control system after use to prevent uninten-
tional switching on of the system.■
Control may only be resumed if the set speed is not too high for the cur-
rent traffic conditions.
149Assist systems

NoteDuring control, speed can be increased by pressing the accelerator pedal. Re-
leasing the accelerator pedal will cause the speed to drop again to the set
speed.
Adaptive Cruise Control (ACC)
Introduction
This chapter contains information on the following subjects:
Operation
150
Automatic stop-start
151
Operation Overview
152
Start control
152
Stop/resume control
152
Set/change the desired speed
153
Set the clearance level
153
Special driving conditions
154
Information messages
155
The automatic distance control (hereinafter referred to as ACC) maintains the
set speed or the distance to the vehicle ahead without the accelerator or
brake pedal being pressed.
The front of the vehicle and the distance to the vehicle ahead is monitored by
a radar sensor » page 135.
The state in which the ACC maintains the speed or the proximity is described
as control from here on.
WARNING■
The general information relating to the use of assistance systems must
be observed » page 135, in section Introduction .■
The driver must always be ready to take over steering of the vehicle him-
self (accelerate or brake).
■
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, railroad 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.
Operation
Fig. 169
Display in the instrument cluster: Examples of ACC displays
150Driving

Fig. 170
Instrument cluster display: Examples of ACC status displays
Read and observe
on page 150 first.
The ACC allows a speed of 30 - 160 km/h to be set or a distance to the preced- ing vehicle to be very short of very long to be set.
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. 120 m ahead using the radar sensor.
ACC display » Fig. 169
Vehicle detected (control active).
Line showing the displacement of the distance when setting » page 153,
Set the clearance level .
Set distance to the vehicle ahead.
Vehicle detected (control deactivated).
ACC status displays » Fig. 170
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).
Control deactivated - no speed stored.
Regulation active - vehicle detected (in the colour display the digits of the
speed limits are highlighted).
1234Note 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!
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 150 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.
Starting 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. Control is
automatically disconnected in case of longer holding periods.
Depress the brake pedal.
151Assist systems