brake AUDI S4 2016 Owner's Guide

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0 ::..:: co ..... ..... Audi adapt ive cruis e control and braking gua rd
You can set any speed between 20 mph and 95
mph (30 and 150 km/h).
I ndicator lamps and messages in the instrumen t
clus ter display inform you about the current sys­
tem status and settings.
Switching Audi adaptive cruise control on
" Pull the lever toward you into position@
¢fig. 116. ACC standb y appears in the i nstru­
ment cluster d isp lay.
Setting the speed and activating regulation
" To set the current speed, press the !SET ! button
¢page 11, fig. 4. The set speed is shown in the
tachometer @ and is also shown b riefly in the
display @¢
fig. 117.
Switching Audi adaptive c ruise control off
" Push the lever away from you into position @
unt il it clicks into place. The message
ACC off
appears.
@ Indic ato r lig hts
II -Adaptive cru ise control is sw itched on. No
vehicles are detected up ahead. The stored speed is ma inta ined.
• -A moving vehicle is detected up ahead . The
adaptive cruise control system regulates the
speed and distance to the moving vehicle ahead
and accelerates/brakes automatically.
• -When automatic braking is not ab le to keep
enough distance to a previous ly detected moving
ve hicle up ahead, you must take contro l and
brake ¢
page 103, Request for driver interven­
tion.
© Di splay
If adaptive cruise control is not shown in the dis­
p lay, you can call it up with the
I RESE T! button
¢page 23.
Based on the symbo ls in the display, you can de ­
termine if the system is ma inta ining a distance to
the vehicle ahead and what that distance is .
No vehicle -No vehicle a head was detected .
White vehicle -A vehicle ahead was dete cted.
Red vehicle -Prompt for the driver to take act ion
¢page 103.
Both arrows on t he sc ale © indica te the d istance
to the vehicle ahead. No arrow appe ars when the
vehicle is on an open road and there is no object
ahead . If an object is detected ahead, the arrow
moves on the sca le .
T he green zone o n the scale shows the stored dis­
tance . For info rmation on changing the stored
distance, refer to¢
page 102. If the distance se­
lected is too close or may soon become too close,
the arrows move into the red zone on the scale.
A WARNING
Improper use of the adapt ive cruise control
ca n cause collisions, other accidents and ser i­
ous persona l injuries.
- Pressing t he
!SET! button when driving at
speeds be low 20 mph (30 km/h), will auto­
mat ica lly acce le rate t he ve hicle to 20 mph
(30 km/h), wh ic h is the minim um speed
that ca n be set.
(D Tips
- If you switch the ig nit ion or the adaptive
cruise cont rol off, the set speed is erased
from the system memo ry.
- The e lectronic stabilization control (ESC)
and the anti-slip-regulation (ASR) are auto­
matically turned on when the adaptive
cruise cont rol is t urned on. Both systems
c annot be turned off if the ada ptive cru ise
cont rol is tu rned on.
Changing the speed
Appl ies to vehicles: with Aud i adapt ive cru ise control
0
f
•
0
Fig . 1 18 Selector leve r: changing the speed
-
;;; N 0 ± '<1 m
101

Audi adaptive cruise control and braking guard
• To increase or reduce the speed in increments,
tap the lever up or down.
• To increase or reduce the speed quickly,
hold
the lever up or down until the red LED @ reach­
es the desired speed
Q page 100, fig . 117.
Following any changes, the new stored speed will
be displayed briefly in the display@Qpage
100,
fig . 117.
Interrupting cruise control
App lies to vehicles: with Audi adaptive cruise control
Fig. 119 Selector leve r
Requirement: adaptive cruise control must be
switched on Q
fig. 119 (J).
Overriding cruise control
• To accelerate manually, press the accelerator
pedal. The message
ACC override appears.
• To resume adaptive cruise control, remove your
foot from the gas pedal. The system returns
again to the speed that was saved before.
• You can save a new speed at any time by press­
ing the
ISETI button Q page 11, fig. 4.
Canceling cruise control while driving
• Move the lever into position @. The message
ACC standby appears . Or
• press the brake pedal.
• To resume the stored speed, move the lever in­
to position
@ .
A WARNING
Never resume the stored speed if the speed is
too high for prevailing road, traffic or weather
conditions.
102
Setting the distance
Applies to vehicles: with Audi adaptive cruise control
Fig. 120 Selector lever: setting the distance
.,. Tap the switch to display the current set dis­
tance Q
fig. 120 .
.,. To increase or reduce the distance by incre­
ments, tap the sw itch again to the left or right.
The distance between the two veh icles will
change in the instrument cluster display .
When approaching a moving vehicle up ahead,
the adapt ive cruise control system b rakes to
match that object's speed and then mainta ins
the s tored distance.
If the vehicle ahead acceler­
ates, adaptive cruise control will also accelerate up to the stored speed .
The higher the speed, the greater the distance in
yards (meters) Q
&.. The Distance 3 setting is
recommended .
The distances provided are spec ified values . De­
pending on the driving situation and the how the
vehicle ahead is driving, the actua l distance may
be more or less than these target distances .
The var ious symbo ls for the time increments ap­
pear briefly in the information line @
Q
page 100, fig. 117 when yo u change the set­
tings.
c::::,_ c::::, __ _ Distance 1 : This setting cor responds
to a distance of 92 feet/28 meters when travel­
in g at 62 mph (100 km/h), or a time interval of 1
second .
c::::, __ c::::, __ Distanc e 2: This setting corresponds
to a distance of 118 feet/36 meters when travel­
i ng at 62 mph (100 km/h), or a time interval of
1.3 seconds .

Audi adaptive cruise control and braking guard
Audi braking guard
Description
Applies to vehicles: with Audi adaptive cruise contro l
Fig. 122 In strument cluste r: appro ach warning
Braking guard uses a radar sensor. It also func­
tions within the limits of the system when adap­
tive cruise control is switched off .
What can Audi braking guard do?
When detected in time, the system can assess
si tuation s when a veh icle ahead brakes suddenly
or if your own vehicle is traveling at a high speed
and approaching a vehicle up ahead that is mov ­
ing more slowly . Braking guard does not react if
it cannot detect the situat ion.
The system advises you of variou s situations:
- The
distance warning is given if you are too
close to the vehicle ahead for a long time. If the
vehicle ahead brakes sharply, you will not be
able to avoid a collision. The indicator light .
in the display comes on.
- The
approach warning is given when a detected
vehicle up ahead in your lane is moving much
more slowly than you are or if it brakes sharply .
When this warning is given, it may only be pos­
s ib le to avo id a collision by swerving or braking
sharply. The indicator light . and indicator in
the d isplay will warn you about the danger
¢fig. 122. You will also hear an acoustic signal.
If you do not react fast enough or do not react at
a ll to the situation, Braking guard will intervene
by braking and the message
braking guard inter­
vention
will appear.
l) This is no t a vail able in som e coun trie s.
104
- If a collision is imminent , the system will first
provid e an
acute warning by briefly and sharply
app lying the b rakes.
- If you do not react to the acute warning, brak­
ing guard can brake within the limits of the sys ­
tem . This reduces the vehicle speed in the event
of a collision.
- At speeds under 20 mph (30 km/h), the system
can initiate a complete deceleration shortly be­
fore a collision ll.
- If the braking gua rd senses that you are not
braking hard enough when a collision is immi­
nent, it can increase the braking force.
Which functions can be controlled?
You can switch braking guard and the distance/
approach warning on or off in the radio or MMI
¢page 105, Settings in the radio/MM!.
A WARNING
Lack of attent ion can cause collisions, other
accidents and ser ious personal injuries . The
braking guard is an assist system and cannot
prevent a collision by itself . The driver must
always inte rvene. The driver is always respon­
sible for braking at the correct time .
- Always pay close attention to traffic, even
when the braking guard is switched on. Be
ready to intervene and be ready to take
complete control whenever necessary. Al­
ways keep the safe and legal distance be­
tween your vehicle and vehicles up ahead .
- Braking guard works within limits and will
not respond outside the system limits, for
example when approach ing a stopped vehi­
cle or stationary obstacle (end of a traffic
jam or vehicle that has broken down in traf­
fic) .
- Always remember that the radar sensor for
the braking guard works only within defined
detection and range limits that may prevent
the proper detection of other vehicles.
- The radar sensor's function and range can
be reduced by rain, snow and heavy spray.
Moving vehicles up ahead may not be
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0 ::..:: co ..... ..... Audi adapt ive cruis e control and braking gua rd
promptly detected or may not be detected
at all.
- Reflective surfaces including crash barriers
or tunnel entrances may impair the function
of the radar sensor.
(D Tips
- You can cancel the braking that is initiated
by the system by braking yourse lf, by accel ­
erating noticeably or by swerving.
- Braking guard error messages ~page
105 .
-Keep in mind that braking guard can brake
unexpected ly. Always secure any cargo or
objects that you are transporting to reduce
the risk of damage or injury.
Settings in the radio/MM!
A ppl ies to vehicles: with Audi adaptive cruise co ntro l
... Se lect : I CARI funct ion button > C ar s ystem s*
control button > Driver a ssi st > Audi brak ing
guard .
Or
... Select:
~I C-A-R~I funct ion button > A udi braking
g uard .
S ystem -
Switch Audi braking guard On and Off.
When you sw itch the ignition on, the message
Audi bra king gua rd off appears if the system is
switched off.
Ea rly warn ing -The distance and approach warn ­
ings in the display can be switched
On /Off .
(D Tips
-Your settings are automatically stored and
ass igned to the remote control key being
used at the times the sett ings are made.
- If you restrict or sw itch off the ESC, the
braking guard also sw itches itself off
~ page
178 .
- Switch braking guard off when you are load­
ing the veh icle onto a vehicle ca rr ier, train,
sh ip or other type of transportation . This
can p revent undesired warnings from the
braking gua rd system .
Messages
Applies to vehicles: wi th Aud i adapt ive c ruise control
Braking guard : Off
This dr iver message appears if the system is
tu rned off via the radio/MM I*. O therwise, if the
system is turne d off, the information appears ev­
ery time shortly after t he start o f the trip .
T he driver message a lso appea rs if the system is
not avai lab le due to a ma lfunction o r if the ES C i s
not switched on¢ page
178 . If th is is the case,
the system wi ll not provide warnings about a
possib le collision .
Braking guard : A ctivated
This dr iver message appears if sharp brake pres­
su re was applied due to an acute warning .
•••
Three white dots appear if a setting cannot be se­
l ected with the operating lever. For example, this
happens if you want to raise/lower the speed
even though there was no previously saved
speed .
ACC: Deacti vation
The driver message appears in vehicles wi th ma n­
u al transmission. If the clutch pedal was pressed
down for too long , the adaptive cr uise control
tu rns off. A chime sounds as a reminder.
ACC : Sen sor blocked
This message appears if the senso r view is ob­
structed, for examp le by leaves, snow, heavy
spray or dirt. Clean the sensor¢ page
98,
fig. 112 .
ACC : not availa ble
The driver message appears if there is a malfunc­
tion. The adaptive cruise control turns off . A
chime so unds as a reminder . Have the system
c h ecked by an author ized Audi dealer or au thor­
ized Audi Service Facili ty.
A CC: una vailable
The driver message appears if, for examp le, the
brake temperature is too high. The adapt ive .,.
105

Audi adaptive cruise control and braking guard
cruise control is temporarily unavailable. A chime
sounds as a reminder.
Engine speed!
This driver message appears in vehicles w ith
manual transm ission if the driver had not up­
shifted or downshifted in t ime wh ile using adap­
tive cruise control braking or accelerating, caus­
ing the vehicle to exceed or not reach the permit­
ted limit speed. The adaptive cruise control turns
off. A chime sounds as a reminder.
Shift lever position!
Veh icles with an automatic transmission: the
driver message appears if the selector lever is
shifted to the N position. T he adaptive cru ise
control is not available while in this position.
Veh icles with manual transmission : the driver
message appears for vehicles w ith manual trans­
miss io n if there is no fo rwa rd gear engaged,
meaning if the reverse gear or the 1st gear is en­
gaged o r if the selector lever is in the neutral po­
sition. The adaptive cruise control is not available
while in this position .
Stabilization control (ESC)
This message appears if the electronic stab iliza­
tion contro l (ESC) is taking action to stabil ize the
veh icle. Th e adapt ive cruise control tu rns off. A
chime sounds as a reminder.
Speed too low
This message appears if the current speed is too
low
to set or to maintain the des ired speed.
The speed being saved must be at least 20 mph
(3 0 km/h). The cru ise control is t urned off for
speeds lower than 12 mph (20 km/h). The adap­
tive cruise control remains turned on for speeds
above 95 mph (150 km/h) (override) . It will sta­
b ili ze aga in at 95 mph (150 km/h) when the driv­
er takes his foot off of the gas pedal.
Parking brake!
The driver message appears when the parking
brake is activated. Adaptive cruise control is
turned off. A chime sounds as a reminder.
106

..... N
0 ::..:: co ,...., & WARNING
All seats are equipped with head restraints. Driving without head restraints or with head
restraints that are not properly adjusted in­
creases the risk of serious or fatal neck injury
dramatically. To help reduce the risk of injury:
-Always drive with the head restraints in
place and properly adjusted.
- Every person in the vehicle must have a
properly adjusted head restraint.
- Always make sure each person in the vehicle
properly adjusts their head restraint. Adjust
the head restraints so the upper edge is as
even as possible with the top of your head.
If that is not possible, try to adjust the head
restraint so that it is as close to this position
as possible.
- Never attempt to adjust head restraint
whi le driving. If you have driven off and
must adjust the driver headrest for any rea­
son, first stop the vehicle safely before at­
tempting to adjust the head restra int.
- Children must always be properly restrained
in a child restraint that is appropriate for
their age and size
q page 158.
Examples of improper seating positions
-
The occupant restraint system con only reduce
the risk of injury if vehicle occupants ore properly
seated.
Improper seating positions can cause serious in­
jury or death. Safety belts can only work when
they are properly positioned on the body. Im­
proper seating positions reduce the effectiveness
of safety belts and will even increase the risk of
injury and death by moving the safety belt to crit­
ical areas of the body. Improper seating positions
also increase the risk of serious injury and death
when an airbag deploys and strikes an occupant
who is not in the proper seating position. A driver
is responsible for the safety of all vehicle occu­
pants and especia lly for children. Therefore:
.. Never allow anyone to assume an incorrect
seating position when the vehicle is being used
q& ,
Driving safety
The following bulletins list only some sample po ­
sitions that will increase the risk of serious injury
and death. Our hope is that these examples will
make you more aware of seating positions that
are dangerous .
Therefore, whenever the vehicle is moving:
-never stand up in the vehicle
- never stand on the seats
- never kneel on the seats
- never ride with the seatback reclined
- never lie down on the rear seat
- never lean up against the instrument panel
- never sit on the edge of the seat
- never sit sideways
- never lean out the window
- never put your feet out the window
- never put your feet on the instrument panel
- never rest your feet on the seat cushion or back
of the seat
- never ride in the footwell
- never ride in the cargo area
A WARNING
-Improper seating positions increase the risk
of serious personal injury and death whenever
a vehicle is being used.
- Always make sure that all vehicle occupants
stay in a proper seating position and are
properly restrained whenever the vehicle is
being used.
Pedal area
Pedals
The pedals must always be free to move and
must never be interfered with by a floor mot or
any other object.
Make sure that all pedals move freely w ithout in­
terference and that nothing prevents them from
returning to their original positions .
Only use floor mats that leave the pedal area free
and can be secured with floor mat fasteners .
If a brake circuit fails, increased brake pedal trav-
el is required to bring the vehicle to a fu ll stop . .,._
125

Driving safety
_& WARNING
Pedals that cannot move freely can cause loss
of vehicle control and increase the risk of seri·
ous injury .
- Never place any objects in the driver's foot­
well. An object could get into the pedal area
and interfere with pedal function . In case of
sudden braking or an accident, you would
not be able to brake or accelerate!
-Always make sure that nothing can fall or
move into the driver 's footwell.
Floor mats on the driver side
Always use floor mats that can be securely at­
tached to the floor mat fasteners and do not in­
terfere wi th the free movement of the pedals .
.,. Make sure that the floor mats are properly se­
cured and cannot
mov e and interfere with th e
pedals
c:> ,& .
Use only floor mats that leave the pedal area un­
obstructed and that are firmly secured so that
they cannot slip out of position. You can obtain
suitable floor mats from your authori zed Audi
dealer .
Floor mat fasteners are installed in your Audi.
Floor mats used in your vehicle must be attached
to these fasteners. Properly securing the floor
mats will prevent them from sliding into posi­
tions that could interfere with the pedals or im­
pair safe operation of your vehicle in other ways.
A WARNING
Pedals that cannot move freely can result in a
loss of vehicle control and increase the risk of
serious personal injury .
- Always make sure that floor mats are prop­
erly secured.
- Never place or install floor mats or other
floor coverings in the vehicle that cannot be
properly secured in place to prevent them
from slipping and interfering with the ped­ als or the ability to control the vehicle.
- Never place or install floor mats or other
floor coverings on top of already installed
126
floor mats. Additional floor mats and other
coverings will reduce the size of the pedal
area and interfere with the pedals.
- Always properly reinstall and secure floor
mats that have been taken out for cleaning .
- Always make sure that objects cannot fall
into the driver footwell while the vehicle is
moving. Objects can become trapped under
the brake pedal and accelerator pedal caus­ ing a loss of vehicle control.
Storing cargo correctly
Loading the luggage compartment
All luggage and other objects must be properly stowed ond secured in the luggage compart­
ment .
Fig. 140 Safe load positioning : place heavy ob jects as low
and as far forward as poss ib le.
Loose items in the luggage compartment can
shift suddenly, changing vehicle handling charac­
teristics. Loose items can also increase the risk of
serious personal injury in a sudden vehicle ma­
neuver or in a collision .
.,. Distribute the load evenly in the luggage com­
partment.
.,. Always place and properly secure heavy items in
the luggage compartment as low and as far for­
ward as possible
c:> fig. 140 .
.,. Secure the load with the cargo net* or with
non-elastic straps secured to the tie -downs*
c:> page 71 c:>page 72.
.,. Make sure that the rear seatback is securely
latched in place.

Intelligent Technology
Intelligent Technology
Notice about data
recorded by the Event
Data Recorder and
vehicle control modules
Event Data Re corder
This vehicle is equipped wi th an Event Data Re ­
corder (EDR) . The main purpose of an E DR is to
record, in certain crash or near crash -like situa­
tions, such as an airbag deploym ent or h itting a
road obstacle, data that will assist in understand­
ing how a veh icle 's systems performed . The EDR
is designed to record data related to veh icle dy­
namics a nd safety systems for a sho rt period of
time, typically 30 seconds or less . The E DR in this
veh icle is designed to reco rd s uch data as :
- How various systems in your vehicle were oper­
at ing;
- Whether or not the driver and passenger safety
belts were buckled/fastened;
- How far ( if at all) the driver was depressing the
acce lerator and/or brake peda l; and,
- How fast the ve hicle was trave ling.
These data can help provide a better understand­ ing of the ci rc u mstances in which c rashes and in ­
juries occur. NOT E: EDR data are recorded by yo ur
veh icle only if a non-trivia l crash situat ion occurs;
no data are recorded by the EDR under normal
driving conditions and no personal data (e .g .,
name, gender, age, and crash location) a re re­
corded . H owever , other pa rties , such as law en­
forcement, cou ld combine the EDR data w it h the
type o f person ally identifyi ng dat a routine ly ac­
qu ired dur ing a crash invest igat ion .
To read data reco rded by an EDR, specia l equip­
men t is req uire d, and access to the veh icle or the
E DR is needed. In ad dition to the vehicle manu­
facturer, other parties, s uch a s law enforcement,
that have t he specia l equipment, can read the in­
formation if they have access to the vehicle or the E DR.
Some s tate laws restrict the re trieva l or down­
loading of data stored by ED Rs insta lled in a vehi ­
cle fo r the express purpose of retrieving data af -
176
ter an accident or crash event withou t the own ­
er 's consent.
Audi will not access the EDR and /or sim ilar data
o r g ive it to others -
- unless t he ve hicle ow ner (o r lessee if the vehi­
cle has been leased) ag rees; o r
- upon the offic ial request by the police; or
- upon the order of a court of law or a govern-
ment agency; or
- for the defense of a lawsuit through the jud icia l
discovery process.
- Audi may also use the data for research about
veh icle operation and safety perfo rmance or
prov ide the data to a th ird party for research
purposes w itho ut identify ing t he specific vehi­
cle or info rmat ion about the ident ity of its own­
er or lessee and only afte r th e re co rded vehicle
d ata has been a ccessed.
Vehicle control modules
You r vehicle is also equ ipped with a number of
e lectronic cont rol modules for va rious vehicle
syste ms, such as engine ma nagement, em iss io n
contro l, air bag s, a nd safety be lts.
These electronic control modules record data
dur ing norma l vehicle operation t hat may be
n eeded by tra ined techn ic ians for d iagnost ic and
r ep air pur poses. The re cording capab ility of these
modules is lim ited to dat a (no sou nd is recor d­
ed). Only a sma ll amount of data is actually re ­
corded over a very limited period of time, or stor­
ed when a system fault is detected by a contro l
module . Some of the data stored may relate to
vehicle speed, direction, or braking, as well as re­
straint system use and performance in the event
of a crash . Stored data can also only be read a nd
down loaded w it h specia l equipment that is d i­
r ec tly connec ted to the vehicle.
(D Tips
Your vehicle may be e quipped w it h Aud i con­
n ect . Yo ur use of certain Aud i connect fea­
tures requires wire less services that are p ro­
v ided by a third party wireless telecomm uni­
cations provider. Fo r de tails regarding how in ­
fo rmation obtained through Aud i connect is
collecte d, processe d, transmitted, use d, an d ..,.

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0 ::..:: co ..... ..... shared, please see your contract with the
wireless telecommunications provider and the
"About Aud i connect" tab in your vehicle's
MMI*:
IMENU I button> Audi connect > About
Audi conn ect.
Electronic Stabilization
Control (ESC)
Description
ESC helps to improve road ho ld ing and vehicle
dynamics to help reduce the probability of skid­
d ing and loss of veh icle control. It works only
when the engine is runn ing . E SC detects certain
d ifficult dr iving sit uat ions, including when t he
ve hicl e is begin ning to spin (yaw) out of co ntro l
a nd helps you to ge t the veh icle back under con­
tro l by se lective ly bra king the wheels, and/or re ­
d ucing engine powe r and provid ing steering as­
sistance to help hold the vehicle on the dr iver's
intended course. The indicator light
GJ in the in­
strument cluster blinks when ESC is taking action
to help you co ntro l the vehicle.
ESC has limitations. It is important to remember
that ESC cannot overcome the laws of physics. It
will not a lways be able to help out under all con­
d itions you may come up aga inst. For example,
ESC may not always be able to help you master
situations where there is a sudde n change in the
coeff icient of friction of the road surface. When
there is a section of dry road that is sudde nly cov­
e red with wate r, slush o r snow, ESC cannot pe r­
form the same way i t wo uld on the dry s urface . If
the vehicle hydrop lanes (rides on a cushion of wa­
ter i nstead of t he road su rface), ESC wi ll not be
ab le to he lp you steer the ve hicle because contact
with the pavement has been interrupted and the
ve hicle cannot be b raked or steered. Dur ing fast
cornering, pa rticula rly on w inding roads, ESC
cannot always deal as effect ively w it h difficult
d riving si tuations tha n at lowe r speeds. When
tow ing a t raile r, ESC is no t able to help you re­
g ai n con trol as it would if you we re not towing a
tra iler .
A lways adjust yo ur speed and driving sty le to
road, traffic and weathe r co nd itions. ESC canno t
override the vehicle's physical lim its, increase the
Intellig ent Technology
available t ract ion, or keep a vehicle on the road if
road depart ure is a resu lt of driver inattention .
Instead, ESC improves the possib ility o f keeping
the vehicle under contro l and on the road d uring
extreme maneuvers by us ing the driver's steer ing
i nputs to help keep the veh icle go ing in the in ­
tended direction.
If you are traveling at a speed
that causes you to run off the road before ESC
c an p rovide any assistan ce, you may not exper i­
en ce the benefi ts of ESC.
ESC is swi tched o n all the time . In certa in s itua­
t ions when you need less tract ion, you can sw itch
off AS R by press ing the button
11) c:> page 178,
fig. 173 o r c:> page 178, fig . 174. Be s ure to
swi tch ASR on again w hen you no longe r need
l ess trac tion.
T he following systems are integ ra ted in the ESC:
Anti-lock brak ing system (ABS)
ABS prevents the wheels from locking up w hen
braking. The vehicle can still be steered even d ur­
i ng hard braking. Apply steady p ressure to the
brake pedal. Do not pump the peda l. A p uls ing in
t h e br ake peda l indicates that the system is help­
i ng yo u to b rake the vehi cle.
Brake assist system
T he brake assist system can decrease braking dis­
tance . It increases b raking powe r when the dr iver
presses the b rake peda l quickly in emergency sit­
u at io ns. You mus t press and ho ld the br ake pedal
u nt il t he s ituat ion is ove r. In vehicles wi th adap­
tive cru ise control *, the brake assist system is
more sensitive if the distance detected to the ve ­
hicle ahead is too sma ll.
Anti-slip regulation (ASR )
ASR reduces engine powe r whe n the dr ive whee ls
begi n to spin and adapts the fo rce to the road
co ndit ions . Thi s makes it easier to start, acce ler ­
ate and d rive up hills .
Electronic differential lock (EDL)
T he ED L brakes wheels t hat are spi nning and
transfe rs the dr ive power to the o ther dr ive
whee l or wheels if the vehicle is equ ip p ed with
all -wheel drive*. This function is not ava ilab le at
higher speeds. .,.
177

Inte llig ent Techn olo gy
In extreme cases, EDL automatically switches off
to help keep the brake on the braked wheel from
overheating. EDL will switch on aga in automati­
cally when conditions have returned to normal.
St eer ing r ecomm endation
The ESC helps to stabilize the vehicle by chang ing
the steering torque .
I n vehicles with dynamic steering*, ESC also
helps to stabilize the stee ring in critical situa­
tions.
Electron ic inter axle differential lock*/
sel ective whe el t orque control *
The electronic interaxle differentia l lock (front
wheel drive) or the selective wheel torque control
(a ll whee l drive) operates when driving through
curves . The front wheel on the inside of the curve
or both wheels on the inside of the curve are
braked selectively as needed. This allows more
precise driving in curves. The applicable system
may not activate when driving in wet or snowy
conditions.
.,&. WARNING
- The ESC and its in tegrated systems canno t
overcome the laws of phys ics. This is espe­
c ially important on slippery or wet roads.
If
the systems begin acting to stabilize your
Switching on /off
vehicle, you should immediately change
your speed to match the road and traffic
conditions. Do not let the increased safety
provided by these systems tempt you to
take risks. Doing so will increase the risk of
a loss of vehicle control, collision and seri­
ous personal injuries.
- Always adapt your speed to road, traffic and
weather conditions. The risk of los ing con­
trol of the vehicle increases when driving
too fast, espec ially through curves and on
slippery o r wet roads, and when driving too
close to vehicles up ahead . The ESC and its
integrated systems cannot always prevent
collisions -there is still a risk of accidents!
- Always accelerate with specia l care on even,
smooth surfaces such as those that are wet
or covered with ice and snow. The drive
wheels can spin even with these assistance
systems that cannot always help to reduce
the risk of loss of vehicle control.
@ Tips
- ABS and ASR only work correct ly when all
four wheels are equipped with identical
t ires. Different tire sizes can lead to a reduc­
t ion in engine power.
- You may hear noises when the systems de­
scribed are working.
ESC turns on automatically when you start the engine .
Fig. 173 Version A: lower center console,~ OFF button
The ESC is des igned to function in levels. Depend­
i n g on the level tha t is selected, the stabilization
function of the ESC is limited or switched off. The
178
Fig. 174 Version B: upper center console,~ OFF button
amount of stabilization contro l w ill diffe r de­
pending on the level.
"' N N N ~ 0:, m