Towing a trailer
On vehicles equipped with a factory-fitted towing device, only the areas A
and
B
» Fig. 138 of the system are active when operating a trailer, there is no
road display.
Note
■ If not all fields around vehicles with Version 3 are shown after the system is
activated, the vehicle will need to be moved a few metres forwards or back-
wards.■
The signal tones for front obstacle recognition are factory-set to be higher
than for rear obstacle recognition.
Activation/deactivation
Read and observe
and on page 141 first.
The system is automatically activated by selecting reverse gear or pressing
the symbol button
» Fig. 138 on page 141 .
This is confirmed by a short acoustic signal (the symbol in the button lights
up).
On vehicles with Version 1, the system can be deactivated by moving out of re-
verse gear.
For vehicles with Version 2 and 3, the system is deactivated by pressing the
symbol button or automatically at a speed over 10 km/h (the symbol
in
the button goes out).
Fault display
If a warning signal sounds for about 3 seconds after activating the system and
there is no obstacle close to your car, this indicates a system fault. The fault is
also indicated by the symbol flashing in the button. Seek help from a spe-
cialist garage.
Note
■ The system can only be activated via the symbol button at a speed of be-
low 10 km/hr.■
By means of the key
in the infotainment display » Fig. 140 on page 142
the display can be switched to the camera image » page 143, Optical Parking
Assistant (rear view camera) .
Road displayFig. 140
Infotainment display: Road dis-
play
Read and observe and on page 141 first.
The display of the upcoming road changes depending on the steering angle
A
» Fig. 140 .
Obstacles that are located on the road are represented by the following col-
ours.
› Red – the distance to the obstacle is less than about 30 cm.
› Yellow – the distance to the obstacle is more than about 30 cm.
Obstacles that are not located on the road are represented by the following
colours.
› Red – the distance to the obstacle is less than about 30 cm.
› White – the distance to the obstacle is more than about 30 cm.
The road ahead is displayed when a forward gear or Neutral is engaged or the
selector lever is in mode D/S or position N is set.
The road behind the vehicle is displayed when reverse gear is engaged or the
selector lever is in mode R.
142Driving
The state in which the steering wheel is operated by the system, is referred to
as parking operation.
The parking aid is part of the park assist system, therefore the information
and safety guidelines » page 140 , Parking aid must also be read and ob-
served.WARNING■ The system only serves to support and does not relieve the driver of the
responsibility for the vehicle operation.■
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 because of the surface
conditions. Therefore we suggest that you do not use the system in such
situations.
■
External noise sources may affect the signals of the system sensors. Un-
der adverse conditions, this may cause objects or people to not be recog-
nised by the system.
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.■
Under certain circumstances, surfaces or structures of certain objects such
as wire mesh fences or powder snow cannot be recognised by the system.
■
Under adverse weather conditions (heavy rain, water vapour, very low or
high temperatures etc.), the system functioning may be limited - “incorrect ob-
stacle detection”.
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.
■
Do without the use of the system if snow chains or a spare wheel is moun-
ted.
■
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.
NoteWe recommend performing the parking at a safe speed to about 5 km / h.
Functioning
Read and observe
and on page 145 first.
Basic system operations
› The measurement and evaluation of the size of parking spaces when driving.
› The determination of the correct position of the vehicle for parking.
› The calculation of the line on which the vehicle drives backwards into the
parking space or forwards from the parking space.
› Automatic rotation of the front wheels during the parking.
The display of the instrument cluster (hereinafter only in the display) informa- tion and system messages are displayed.
When the system is activated, the warning light lights up
» Fig. 144 on
page 145 -
.
The traction control system (TCS) must always be switched on when parking.
Finding a parking space
Fig. 144
System button / display
Read and observe
and on page 145 first.
Finding a parallel parking space
›
Drive past the parking space at up to 40 km/h and a distance of 0.5 – 1.5 m.
›
Press the symbol button once
» Fig. 144 .
The display shows » Fig. 144 -
.
145Assist systems
The parking procedure was ended because the time limit of 6 minutes was
passed.
Park Assist currently not available.
The system cannot be activated because a fault exists on the vehicle. Seek
help from a specialist garage.
Park Assist stopped. Not available.
The parking procedure was ended because a fault exists on the vehicle. Seek
help from a specialist garage.
Park Assist faulty. Workshop!
The parking procedure is not possible because a fault exists in the system.
Seek help from a specialist garage.
ASR intervention. Take over steering!
The parking procedure is terminated by a TCS intervention. Park Assist: indicate and engage reverse
The prerequisites for manoeuvring out of a parking space using the system
have been met. Switch on the turn signals and shift into reverse.
Aut. parking space exit not possible. Space too small.
The manoeuvring procedure using the system is not possible. The parking gap
is too small.
Braking intervention. Speed too high.
The speed was too high during the parking and was automatically reduced.
Cruise Control System
Introduction
This chapter contains information on the following subjects:
Functioning
148
Operating Description
149
The Cruise Control System (CCS) maintains a set speed without you having to
actuate the accelerator pedal.
The state where the GRA maintains the speed is referred to hereinafter as the
control .
WARNING■
The GRA only serves to support and does not relieve the driver of the re-
sponsibility for the vehicle operation.■
Always adjust the speed and driving style to the current visibility, weath-
er, road and traffic conditions.
■
After pressing the clutch pedal, no interrupted control occurs! For exam-
ple, if a different gear is engaged and the clutch pedal is released, control is
continued.
Functioning
Fig. 146
Instrument cluster display: Examples of status displays the CCS
Read and observe
on page 148 first.
CCS status indications » Fig. 146
Speed set, control inactive (the number of speed indications are small and
grey in colour).
Control is active (the numbers of speed indications are shown large or are
highlighted).
No speed set.
System fault - seek assistance from a specialist garage immediately.
Basic requirements for start of control The GRA is activated.
On vehicles with manual transmission , second gear or higher is engaged.
On vehicles with 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.
148Driving
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 Description
Fig. 147
Cruise control system controls
Read and observe on page 148 first.
Overview of the CCS controls » Fig. 147ADeactivate CCS (delete set speed) Stop control (sprung position) Activate ACC (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.
Note
During 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:
Radar sensor
150
Operation
151
Automatic stop-start
152
Operation Overview
152
Start control
152
Stop/resume control
153
Set/change the desired speed
153
Set time interval level
153
Special driving conditions
154
Information messages
155
Adaptive cruise control (from here on referred to only as ACC) can maintain the
set speed or the proximity to the vehicle ahead consistently, without the need
to operate the gas or brake pedals.
The state in which the ACC maintains the speed or the proximity is described
as control from here on.
149Assist systems
WARNING■The system only serves to support and does not relieve the driver of the
responsibility for the vehicle operation.■
The driver must always be ready to take over steering of the vehicle him-
self (accelerate or brake).
■
Always adapt your speed and safety proximity to the vehicle ahead to the
current visibility, weather, road and traffic conditions.
WARNING■ 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.
CAUTION
The control may automatically switch off when some brake assist systems (e.g.
ESC) intervene, when the maximum permissible engine speed is exceeded, etc.
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 elec-
trically connected trailer, the ACC becomes unavailable.
Radar sensorFig. 148
Mounting location of the radar
sensor
Read and observe and on page 150 first.
The radar sensor » Fig. 148 (From here on referred to as sensor) is used to as-
sess the traffic situation in front of the vehicle.
The sensor can distinguish objects by radiating and receiving electromagnetic waves.
The sensor function may be impaired in the events of one of the following.
› The sensor is covered by mud, snow or debris, for example.
› The sensor or its immediate surroundings are covered by other objects, for
example, a sticker is attached.
› When visibility is poor, (e.g. fog, heavy rain, thick snowfall).
If the sensor is dirty or does not have “visibility” for any other reason, the fol- lowing message appears in the instrument cluster display » page 155.
WARNING■
If you suspect that the sensor is damaged, deactivate the ACC. Have the
sensor checked by a specialist garage.■
The sensor can become misaligned by collisions or by damage to the front
of the vehicle, the wheel arch or the underside of the vehicle. This can lead
to an impairment of the ACC function - risk of accidents! Have the sensor
checked by a specialist garage.
■
The area in front of and around the sensor must not be covered with
stickers, additional lights or similar items. This can lead to impaired function
of the sensor - risk of accidents!
150Driving
WARNINGThe sensor may not be able to distinguish all objects correctly under certain
circumstances. You should therefore not use ACC in the following cases -
risk of accidents!■
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.).
CAUTION
Remove the snow with a brush and the ice with a solvent-free de-icer.
Operation
Fig. 149
Instrument cluster display (ACC): Set proximity, recognized vehi-
cle
Fig. 150
Instrument cluster display: Examples of ACC status displays
Read and observe and on page 150 first.
ACC can be controlled and the settings adjusted using the control lev-
er » Fig. 151 on page 152 or in Infotainment » infotainment manual , chap-
ter Vehicle settings (CAR key) .
Distance setting and a detected vehicle » Fig. 149
Vehicle detected (control active).
Line, which indicates the time interval delay when adjusting.
Set time interval to the vehicle ahead.
Vehicle detected (control deactivated).
ACC status indications » Fig. 150
Control is inactive (the numbers of the speed indications are small and of a
grey color).
Control activated - no vehicle detected.
Control deactivated - no speed stored.
Control active - vehicle is detected (the figures of the speed indications
are displayed larger or are highlighted).
The ACC can consistently maintain the set speed of 30-160 km/h, as well as
the proximity to the vehicle ahead ranging from a very small to a very long
time interval.
The ACC adjusts the set speed with respect to the detected vehicle ahead,
thus maintaining the selected proximity.
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!
The ACC can detect a vehicle that is up to approx. 120 m ahead using the radar
sensor.
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.1234ABCD151Assist systems
Automatic stop-startRead and observe
and 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.
Operation Overview
Fig. 151
Operating lever
Read and observe
and on page 150 first.
Overview of ACC functions operated with the lever » Fig. 151A Set proximity levelBStart control (adopt current speed) / Reduce speed by 1 km/h at
a time1Activate ACC (control 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 time
Note
If the lever is set » Fig. 151 from the position directly into the sprung posi-
tion, the current speed is stored and the control process is started.
Start control
Read and observe
and on page 150 first.
Basic requirements for start of control ACC is enabled.
TCS is enabled » page 138, 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.
On vehicles with an automatic transmission , the current speed must be
higher than approx. 2 km/h.
The control be started with the key or by adjusting the lever
» Fig. 151
on page 152 into the sprung position.
Button
›
Press button.
The ACC will adopt the current speed and execute control.
Lever position
›
Set the lever into the sprung position .
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 cruise con-
trol system is switched on.
152Driving
Towing a trailer
When towing a trailer, the ACC control will be less powerful. The manner of
driving should therefore be adapted to this limitation.
Information messages
Read and observe
and on page 150 first.
The information messages are shown in the instrument cluster display. ACC: No sensor view!
The sensor is dirty or has no “visibility”. Stop the car, switch off the engine and
clean the sensor or remove the obstacle causing the lack of “visibili-
ty” » Fig. 148 on page 150 . Should the ACC still be unavailable after the engine
is restarted, push the lever into
» Fig. 151 on page 152 position. Seek help
from a specialist garage.
ACC not available.
Stop the vehicle, switch off the engine and then start it again. If the ACC is still
not available, push the lever into position . Seek help from a specialist ga-
rage.
Error: ACC
There is an ACC system error. Push the lever into position . Seek help from a
specialist garage.
Speed limit
Increase the speed accordingly and start control » page 152.
Front Assistant
Introduction
This chapter contains information on the following subjects:
Radar sensor
155
Operation
156
proximity warning (dangerous proximity)
156
Warning and automatic braking
156
Activating/deactivating
157
Information messages
157The Front Assistant (from here on only referred to as the system) warns you of
the danger of a collision with a vehicle or another obstacle in front of the vehi-
cle, 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 » Fig. 154 on
page 155 .WARNING■
The system only serves to support and does not relieve the driver of the
responsibility for the vehicle operation.■
The system has physical and system-related limitations. For this reason,
the driver may experience some undesired or delayed system responses in
certain situations. You should therefore always be alert and ready to inter-
vene!
■
Always adapt your speed and safety proximity to the vehicle ahead to the
current visibility, weather, road and traffic conditions.
■
The increased passenger protection afforded through the system must
not tempt you to take greater risks than otherwise – risk of accident!
■
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.
Radar sensor
Fig. 154
Mounting location of the radar
sensor
Read and observe and on page 155 first.
The radar sensor » Fig. 154(hereinafter referred to simply as the sensor) can
detect objects by emitting and receiving electromagnetic waves.
155Assist systems