S tronic AUDI A7 2015 Owner's Guide

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caused by airbags when they inflate, particu­
l arly when the occupant sitting next to it is
not seated properly. The s ide a irbag for the
front passenger seat can be used with proper ­
ly installed chi ld res traints. Please be sure to
read the important information and warnings
whenever us ing a child restraint in a veh icle :
Safety belts
c::;, page 138, A irbag system
c::;, page 147, Child safety ~ page 173.
The side airbag system basically con sists of:
- the e lectronic control module and external
s ide impact sensors
- the two airbags located in the sides of the
front backrests and the two airbags* located
in the rear backrest
- the airbag warning light in the instrument
cluster.
The airbag system is monito red elect ron ica lly
to make certain that it is functioning properly
at all times. Each time you switch on the igni­
tion, the airbag system indicator light will
come on for a few seconds (self diagnostics) .
T he side airbag system supplements the safe­
ty belts and can help to reduce the risk of in ­
jury to the driver's, front and rear passenger's upper torso on t he side of the vehicle that is
struck in a side collision . The airbag deploys
only in s ide impac ts and on ly when the veh icle
acceleration registered by the control u nit is
hi gh enough . If this rate is below the refer­
e nce va lue progr ammed i nto the con trol un it,
the side airbags will not be triggered, even
though the ca r may be badly damaged as a re­
sult of the collision . It is not possible to de­
f ine an a irbag trigger ing range that will cover
eve ry possible angle of impact, since the cir­
cumstances will vary considerably between
one co llision and another . Important facto rs
in clude, for examp le, the natu re (hard o r soft)
of the impacting objec t, the ang le of impact ,
ve hicl e speed, etc. ~
page 1 68, Impor tan t
safety instructions on the side airbag system.
Aside from the ir no rmal safety function, safe­
ty belts wor k to he lp keep the d river or front
passenger in posi tion in the event of a side
Airbag system 167
collision so that the side airbags can provide
protection.
T he airbag system is
not a substi tute fo r your
s af ety belt . Ra ther, it is part o f the over all oc­
cupant restra int system in you r vehicle . A l­
ways remember that the side airbag system
can on ly help to protect yo u if you are wearing
your safety be lt and wearing it proper ly. This
is another reason why you should always wear
your safety be lts, not just because the law re­
quires you to do so c::;,
page 138, General
notes.
It is important to remember that wh ile the
suppleme nta l side airbag system is desig ned
to r educe the likelihood of ser ious injuries,
othe r injur ies, for exampl e, swelling, bru is ing ,
friction bur ns and m ino r abrasions can a lso be
associ ated w ith dep loye d side airbags. Re­
member too, si de a irbags w ill dep loy o nly
once an d only in ce rtain kinds of accidents -
yo ur safety be lts a re a lways there to offer p ro ­
tection .
Vehicle damage, repair costs o r even the lack
of ve hicle damage are not necessarily a n indi ­
cation of over-sensitive or failed airbag activa­
tion. In some coll is ions, both front and side
a irbags may inflate. Remember too, that air­
bags will deploy only once a nd only in cer tain
ki nds of col lisions -you r safety belts a re a l­
ways t he re to offe r protection in those acc i­
dents i n which a irbags are not supposed to
deploy or when they have a lready deployed .
The side airbag system will not deploy:
-when the ignit io n is switched off
- in side co llisions whe n the acceleration
meas ured by t he sensor is too low
- in front-end collisions
- in rear -end co llisions
- in rollove rs .
In some types of accidents the front airbags,
s ide cu rtain airbags and s ide a irbags may be
t rigge red together. .,,. •
•

1 70 Airbag system
The side curtain airbags are located on both
sides of th e interior above the front and rear
side windows ~
fig. 169. They are ident ified
by the word "AIRBAG" on the windshield
frame and the center roof pillar.
The side curtain airbag system supplements
the safety belts and can help to reduce the risk of injury for occupants' heads and uppe r
torso on the side of the vehicle that is struck
in a side collision . The side curtain airbag in­
flates in side impacts and only when the vehi­
cle acceleration registered by the control unit is high enough. If this rate is below the refer­
ence value programmed into the control unit,
the side curtain airbag will not be triggered,
even though the car may be badly damaged as
a result of the collision. It is not possible to
define an airbag triggering range that will
cover every possible angle of impact, since the
circumstances will vary considerably between
one collision and another. Important factors
include, for example, the nature (hard or soft)
of the impacting object, the angle of impact,
vehicle speed, etc.~
page 171, How side cur­
tain airbags work.
Aside from their normal safety function, safe­
ty belts work to help keep the driver or front
passenger in position in the event of a colli­
sion so that the side curtain airbags can pro­
vide protection.
The airbag system is not a substitute for your
safety belt. Rather, it is part of the overall oc­
cupant restraint system in your vehicle. Al­
ways remember that the airbag system can
only help to protect you if you are wearing
your safety belt and wearing it properly. This
is another reason why you should always wear
your safety belts, not just because the law re­
quires you to do so
Q page 138, General
notes.
It is important to remember that while the
side curtain airbag system is designed to help
reduce the likelihood of serious injuries, other
injuries, for example, swelling, bruising, fric ­
tion burns and minor abrasions can also be as­
sociated with these airbags upon deployment. Remember too, these airbags will deploy only once and only in certain kinds of accidents
-
your safety belts are always there to offer pro­
tection.
The side curtain airbag system basically
consists of:
- The electronic control module and external
side impact sensors
- The side curtain airbags above the front and
rear side windows
- The airbag indicator light in the instrument
panel
The airbag system is monitored electronically
to make certain it is functioning properly at all
times. Each time you switch on the ignition,
the airbag system indicator light will come on
for a few seconds (self diagnostics).
The side curtain airbag is not activated:
- if the ignition is switched off,
- in side collisions when the acceleration
measured by the sensor is too low,
- in rear-end collisions.
_&. WARNING
- Safety belts and the airbag system will
only provide protection when occupants
are in the proper seating position
¢page 53, General recommendations.
- If the airbag indicator light Q page 19
comes when the vehicle is being used,
have the system inspected immediately
by your authorized Audi dealer. It is pos­
sible that the airbag will inflate when it
is not supposed to, or will not inflate
when it should.
.

174 Child Safety
-Always install rear-facing child safety
seats on the rear seat.
- If you must install a rearward facing
child safety seat on the front passenger
seat in exceptional circumstances and
the
PASSENGER AIR BAG OFF light does
not come on and stay on, immediately
install the rear-facing child safety seat in
a rear seating position and have the air­
bag system inspected immediately by
your Audi dealer.
_&, WARNING
- Forward-facing child seats installed on
the front passenger seat may interfere
with the deployment of the airbag and
cause serious personal injury to the
child.
- If exceptional circumstances require the
use of a forward-facing child restraint on
the front passenger 's seat, the child's
safety and well-being require the follow­ ing special precautions to be taken:
- Always make sure that the forward-fac­
ing seat has been designed and certi­
fied by its manufacturer for use on a
front passenger seat with a front and
side airbag.
- Always carefully follow the manufac­
turer's instructions provided with the
child seat or infant carrier.
- Never install a child restraint without a
properly attached top tether strap if
the child restraint manufacturer's in­
structions require the top tether strap
to be used.
- Never put the forward-facing child re­
straint up against or very near the in­
strument panel.
- Always set the safety belt upper an­
chorage to the adjustment position
that permits proper installation in ac­
cordance with the child restraint manu­
facturer's instructions.
-Always move the passenger seat into
its rearmost position in the seat's fore
and aft adjustment range, as far away
.
from the airbag as possible before in­
stalling the child restraint. The back­
rest must be adjusted to an upright po­
sition .
- Always make sure that nothing pre­
vents the front passenger's seat from
being moved to the rearmost position
in its fore and aft adjustment range.
- Never place objects on the seat (such
as a laptop, CD player, electronic
games device, power inverter or seat
heater for child seats) . These may in­
fluence the electrical capacitance
measured by the capacitive passenger
detection system and can also fly
around in an accident and cause serious
personal injury.
- Never place or use any electrical device
(such as a laptop, CD player, electronic
games device, power inverter or seat
heater for child seats) on the front pas­
senger seat if the device is connected
to the 12 -volt socket or the cigarette
lighter socket.
- If a seat heater has been retrofitted or
otherwise added to the front passen­
ger seat, never install any child re­
straint system on this seat.
- Make sure that there are no wet objects
(such as a wet towel) and no water or
other liquids on the front passenger
seat cushion .
- Always make sure that the
PASSENGER
AIR BAG OFF
light comes on and stays
on all the time whenever the ignition is
switched on.
- If the PASSENGER AIR BAG OFF light
does not come on and stay on, immedi­
ately install the forward-facing child seat in a rear seating position and have
the airbag system inspected by your
authori zed Audi dealer.
- Always buckle the child seat firmly in
place even if a child is not sitting in it.
A loose child seat can fly around during
a sudden stop or in a collision.
~

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-Always read and heed a ll WARNINGS
whenever using a child restraint in ave­
h icle
¢ page 138, Safety belts,
¢ page 147, Airbag system and
¢ page 173, Important things to
know.
(D Tips
Always replace child restraints that were
installed in a vehicle during a crash. Dam­
age to a child rest raint that is not vis ible
could cause it to fail in another collis ion
situation.
Advanced front airbag system and children
Your vehicle is eq uipped with a front "Ad ­
vanced Airbag System" in compliance w ith
United States Federal Motor Vehicle Safety
Standard (FMVSS) 208 as applicable at the
time your veh icle was manufactured .
T he Advanced Airbag system in your vehicle
has been certified to meet the "low-risk" re­
qu irements for 3-and 6-year old ch ildren on
the passenger s ide and small adults o n the
driver side. The low risk deployment criter ia
a re i ntended to reduce the risk of inju ry
through interaction with the a irbag that can
oc cu r, fo r example , by be ing too close to the
steering whee l and instrument panel when
the airbag inflates . In addition, the system
has been certified to comply with the "sup­
press ion" requirements of the Safety Stand­
ard, to turn off the front airbag for infants up
to 12 months who are restra ined on the front
passenger seat in ch ild restraints that are list­
ed i n the Standard .
Even though your vehicle is equipped with an
Advanced Airbag system, all chi ldren, espe­
cially those 12 years and younger, shou ld al­
ways ride in t he back seat properly rest ra ined
fo r the ir age and s ize. The a irbag on t he pas­
senger side makes the fro nt seat a poten tially
d a ngerous pla ce for a child to ride. The front
seat is not the safest place fo r a child in a fo r­
ward-facing child safety seat . It can be a very
Child Sa fet y 175
dange rous place fo r an infant o r a larger child
in a rearward-facing seat.
T he veh icle's Advan ced Ai rb ag Sys tem has a
capacit ive passenger detec tion system in the
front passenger seat cush ion that can detect
the presence of a baby or a c hild in a child re­
stra int system on this seat .
T he capaci tive passenge r detection system
r egisters the changes that result in an electri ­
ca l fie ld when a chi ld, a ch ild restraint, and a
baby blanket are on the front passenger seat .
The change in the measured capac itance due
to the presence of a child, a child restraint,
and a baby blanket on the front passenger
seat is related to the ch ild restraint system
rest ing on the seat . The meas ured capacitance
of a child res traint system va ries depend ing
o n the type of sys tem and specific m ake and
model.
T he elect rical capac itance of the va rious
types, ma kes, a nd models of child restra ints
spe cified by the U.S. Nationa l Highway Traff ic
Safety Administra tion (N HTSA) in the re levant
sa fety standard are stored in the Advanced
Airbag System contro l unit together with the
capacitances typical of infants and a 1-year
o ld child. W hen a child restraint is used on t he
front passenger seat with a typica l 1 year-old
infant, t he Advanced Airbag System compares
the capacitance measu red by the capacitive
passenger detection system with the data
s tored in the ele ctronic co ntrol unit.
Child restraints and Advanced front
airbag system
Rega rdless of the c hild restraint that you use,
make sure that it has been certified to meet
U nited States Federal Motor Vehicle Safety
Standards and has been certified by its manu­
facturer for use with an airbag. A lways be sure
that the ch ild restra int is properly installed at
o ne of the rear seating positions. If in excep­
t iona l circumsta nces yo u must use it on the
fron t passenger sea t, ca re fully read all of the
i nformation on child sa fe ty and Advanced Air -
bags and heed all of the applicable ..,.
•
•

178 Child Safety
an accident. The child will strike the in­
terior of the vehicle and can also be
struck by the passenger.
- The child and the passenger can also
injure each other in an accident .
- Never install rear-facing child safety
seats or infant carriers on the front pas­
senger seat. A child will be seriously in­
jured and can be killed when the passen­ ger airbag inflates - even with an Ad ­
vanced Airbag System.
- The inflating airbag will hit the child safety seat or infant carrier with great
force and will smash the child safety seat
and child against the backrest, center
armrest, door or roof.
- Always install rear-facing child safety
seats or infant carriers on the rear seat.
- Forward-facing child safety seats instal­
led on the front passenger's seat can in­
terfere with the airbag when it inflates
and cause serious injury to the child. Al­
ways install forward-facing child safety
seats on the rear seat.
- If exceptional circumstances require the use of a forward-facing child restraint on
the front passenger's seat, the child's safety and well-being require that the
following special precautions be taken:
- Make sure the forward-facing seat has
been designed and certified by its man­
ufacturer for use on a front seat with a
passenger front and side airbag.
- Always carefully follow the manufac­
turer's instructions provided with the
child safety seat or carrier.
- Always move the front passenger seat
into the rearmost position of the pas­
senger seat's fore and aft adjustment
range, and as far away from the airbag
as possible before installing the child
restraint.
- Always make sure that nothing pre­
vents the front passenger 's seat from
being moved to the rearmost position
in its fore and aft adjustment range.
- Always make sure that the backrest is
in the upright position . -
Never place or use any electrical device
(such as a laptop, CO player, electronic
games device, power inverter or seat
heater for child seats) on the front pas­
senger seat if the device is connected
to the 12-volt socket or the cigarette
lighter socket.
- If a seat heater has been retrofitted or
otherwise added to the front passen­
ger seat , never install any child re­
straint system on this seat.
- Make sure that there are no wet objects
(such as a wet towel) and no water or
other liquids on the front passenger
seat cushion.
- Never place objects on the seat (such
as a laptop, CO player, electronic
games device, power inverter or seat
heater for child seats) . These may in­
fluence the electrical capacitance
measured by the capacitive passenger
detection system and can also fly
around in an accident and cause serious
personal injury .
- Always buckle the child safety seat firmly
in place even if a child is not sitting in it.
A loose child safety seat can fly around
during a sudden stop or in a collision.
-Always read and heed all WARNINGS
whenever using a child restrained in ave­
hicle is being used
~page 138, Safety
belts,
~ page 147, Airbag system and
~ page 173, Child Safety.
A WARNING
To reduce the risk of serious injury, make
sure that the
PASSENGER AIR BAG OFF
light comes on and stays on whenever a
child restraint is installed on the front pas­
senger seat and the ignition is switched
on.
- Take the child restraint off the front pas­
senger seat and install it properly at one
of the rear seat positions if the
PASSEN­
GER AIR BAG OFF
light does not stay on .
- Have the airbag system inspected by
your authorized Audi dealer immediate­ ly .

180 Child Safet y
It is a very dangerous place for an infant or a
larger child in a rearward-facing seat.
.&_ WARNING
Not using a child safety seat, using the
wrong chi ld safety seat or improperly in­
stalling a child restraint increases the risk of serious personal injury and death in a
crash .
- Never install rear-facing ch ild safety
seats or infant carriers on the front pas­ senger seat -even with an Advanced Air­
bag System. A child wi ll be seriously in­
jured and can be k il led when the inflat­
ing airbag hits the child safety seat or in­
fant ca rrier with great force and smashes
the chi ld safety seat and chi ld aga inst
the backrest, center armrest, door or roof
c:> page 149, Child restraints on the
front seat -some important things to
know.
- Always install rear-facing child safety
seats or infant carriers on the rear seat.
- Never install a rear-facing child restraint in the forward-facing direction. Such re­
straints are des igned for the spec ial
needs of infants and very small children
and cannot protect them properly if the
seat is forward-fac ing.
- If you must install a rearward facing
child safety seat on the front passenger
seat because of exceptional circ umstan­
ces and the
PA SS ENGER AIR BAG OFF
light does not come on and stay on, im­
mediately install the rear -facing child
safety seat in a rear seating position and
have the airbag system inspected by your
Audi dealer.
- Never place or use any electrical device
(such as a laptop, CD player, electron ic
games dev ice, power inverter or seat
heater for child seats) on the front pas­
senger seat if the device is connected to
the 12-volt socket or the cigarette light­ er soc ket.
- If a seat heater has been retrofitted or
otherwis e added to the front passenger seat, never install any chi
ld restraint sys­
tem on th is seat.
- Make sure that there are no wet objects
(such as a wet towel) and no water or
other liquids on the front passenger seat
cushion.
- Never p lace objects on the seat (such as
a laptop, CD player, electronic games de­
vice, power inverter or seat heater for
child seats). These may influence the
electrical capacitance measured by the
capacitive passenger detection system
a nd can also f ly around in an a ccident
and cause serious persona l injury.
- A lways read and heed all WAR NINGS
whenever using a child restrained in ave­
hicle is being used
¢ page 138, Safety
belts,
¢ page 147, Airbag system and
c::> page 173, Important things to know .
Convertible child safety seats
Properly used convertible child safety seats
can help protect toddlers and children over
age one who weigh between 20 and 40 lbs. (9
and 18 kg) in a crash.
Fig. 173 Sc hemat ic overview: instal lat ion of the at­
tac hmen ts applicab le to a LA T CH seat
Fig . 17 4 Schemat ic overv iew: installa tion of t he sea t
using the vehicle 's safety belt syste m
Iii-

182 Child Safety -Always follow the manufacturer's in­
structions provided with the child safety
seat or infant carrier.
- Always move the front passenger seat in­
to the rearmost position of the passen­
ger seat's fore and aft adjustment range,
and as far away from the airbag as possi­ ble before installing the child restraint .
- Always make sure that nothing prevents
the front passenger's seat from being
moved to the rearmost position in its
fore and aft adjustment range.
-Always make sure the backrest is in an
upright position.
- Never place or use any electrical device (such as a laptop, CD player, electronic
games device, power inverter or seat
heater for child seats) on the front pas­
senger seat if the device is connected to
the 12-volt socket or the cigarette light­
er socket.
- If a seat heater has been retrofitted or
otherwise added to the front passenger
seat, never install any child restraint sys­
tem on this seat.
- Make sure that there are no wet objects
(such as a wet towel) and no water or
other liquids on the front passenger seat
cushion.
- Never place objects on the seat (such as
a laptop, CD player, electronic games de­
vice, power inverter or seat heater for child seats). These may influence the
electrical capacitance measured by the
capacitive passenger detection system
and can also fly around in an accident
and cause serious personal injury.
- Make sure that the
PASSENGER AIR BAG
OFF
light comes on and stays on all the
time whenever the ignition is switched
on.
- If the
PASSENGER AIR BAG OFF light
does not come on and stay on, immedi­
ately install the forward-facing child seat
at a seating position on the rear seat and have the airbag system inspected by your
authorized Audi dealer. -
Take the child restraint off the front pas­
senger seat and install it properly at one
of the rear seat positions if the
PASSEN­
GER AIR BAG OFF
light does not stay on
whenever the ignition is switched on.
Booster seats and safety belts
Properly used booster seats can help protect
children weighing between about 40 lbs. and
80 lbs. (18 kg and 36 kg) who are less than 4
ft. 9 in . (57 inches/1 .45 meters) tall.
"' ....
"' 0 ±
o5
Fig. 175 Rear seat: child properly restrained in a boos­
te r seat
The vehicle 's safety belts alone will not fit
most children until they are at least 4 ft . 9 in.
(57 inches/1.45 meters) tall and weigh about
80 lbs. (36 kg). Booster seats raise these chil­
dren up so that the safety belt will pass prop­
erly over the stronger parts of their bodies
and the safety belt can help protect them in a
crash.
.,. Do not use the convertible locking retractor
when using the vehicle's safety belt to re­
strain a child on a booster seat.
.. The shoulder belt must lie as close to the
center of the child's collar bone as possible
and must lie flat and snug on the upper
body. It must never lie across the throat or
neck . The lap belt must lie across the pelvis
and never across the stomach or abdomen .
Make sure the belt lies flat and snug. Pull on
the belt to tighten if necessary .
.,. If you must transport an older child in a
booster seat on the front passenger seat,
you can use the safety belt height adjust­
ment to help adjust the shoulder portion
properly. ..,.

194 Intelligent technology
Intelligent technology
Notice about data
recorded by the Event
Data Recorder and
vehicle control modules
E ve nt Dat a Recorder
This vehicle is equipped with an Event Data
Recorder (EDR) . The main purpose of an EDR
is to record, in certain crash or near crash-like
situations, such as an airbag deployment or h itting a road obstacle, data that will ass ist in
understand ing how a veh icle's systems per­
formed. The EDR is designed to record data
re lated to vehicle dynamics and safety sys­
tems for a short period of time, typically
30 seconds or less. The EDR in this vehicle is
designed to record such data as:
- How various systems in you r vehicle were
operating;
- Whether or not the d river a nd passenger
safety belts were buckled/fastened;
- How far ( if at all) the dr iver was dep ress ing
the accelerator and/or brake peda l; and,
- How fast the ve hicle was traveling.
These data can help provide a better under­
stand ing of the c ircumstances in which crash­
es and injuries occur . NOTE : EDR data a re re­
corded by your veh icle only if a non-trivial
crash sit uat ion occ urs; no data are recorded by
the EDR under normal driving cond itions and
no personal data (e.g., name, gender, age,
and crash location) are recorded. However,
other parties, such as law enforcement, co uld
comb ine the EDR data with the type of per­
sonally identify ing data routinely acquired
during a crash invest igation .
To read data recorded by an EDR, special
equ ipment is required, and access to the veh i­
cle or the EDR is needed. In add ition to the ve­
h icle manufacturer, other parties, such as law
e nfo rcement, that have the special equip­
ment, can read the information if they have
access to the ve hicl e or the EDR. Some state
laws restrict the retrieval o r down­
loading of data stored by ED Rs insta lled in a
vehicle for the express purpose of retrieving data after an accident or crash event w ithout
the owner's consent .
Audi will not access the EDR and/or simi lar
data or g ive it to others -
- un less the vehi cle owner (or lessee if the ve ­
hicle has been leased) agrees; or
- upon the officia l request by the police ; or
- upon the o rder of a court of law or a govern-
ment agency; or
- for the defense of a lawsuit through the ju­
dicia l discovery p rocess.
- Aud i may also use the data for research
about vehicle ope rat ion and safety perform­
ance or provide the da ta to a third party fo r
research purposes without iden tif ying the
specif ic vehicle or in formation about the
identity of its owner or lessee and only after
the recorded vehicle data has been ac­
cessed .
Vehicle control modul es
Your vehicle is also equ ipped with a n umber of
electron ic control modules for various vehicle
systems, such as engine management, emis­
sion contro l, airbags, and safety belts.
T hese electronic con trol mod ules record data
during norma l vehicle operation that may be
needed by trained technicians for diagnostic
and repair purposes. The recording capability
of these modu les is limited to data (no sound
is recorded). Only a small amount of data is
actually recorded over a very lim ited period of
t ime, or stored when a system fault is detect­
ed by a contro l modu le. Some of the data
stored may re late to vehicle speed, direction,
o r braking, as well as restraint system use and
performance in the event of a crash. Stored
data can also only be read and dow nloaded
with special eq uipment that is directly con-
nected to the vehicle. .,..

@ Tips
Your vehicle may be equipped with Audi
connect. Your use of certain Aud i connect
features req uires wireless serv ices that are
provided by a third party wireless telecom­
municat ions provider. For details regard­
ing how information obtained through
Aud i connect is collected, processed,
transmitted, used, and shared, please see
your contra ct w ith the wire less telecom ­
municat ions provider and the "About A udi
connect" tab in your vehicle's MMI:
!MENU !
button > Audi connect > About Audi con·
nect .
Electronic Stabilization
Control (ESC)
Description
ESC helps to improve road holding and vehicle
dynamics to help reduce the probability of
skidd ing and loss of veh icle control. It works
only when the eng ine is running. ESC detects
certain difficult driv ing s ituations, including
when the vehicle is beginning to spin (yaw)
out of cont ro l and helps you to get the vehicle
back under control by select ively brak ing the
wheels, and/or red ucing engine powe r and
p roviding steering assistance to help hold the
ve hicle on the driver's intended course . The in­
dicator light
m in the instrument cluster
blinks when ESC is taking action to help you
control the vehicle.
ESC has limitations.
It is important to remem­
ber that ESC cannot overcome the laws of
phys ics. It will not a lways be able to help out
under all conditions you may come up against.
For example, ESC may not always be able to
h elp you master situat ions where there is a
sudden change in the coefficient of fr iction of
the road surface. When there is a sect io n of
d ry road that is s udden ly cove red with water,
slush o r snow, ESC canno t perform the same
way it would on the dry su rface.
If the vehicle
hydroplanes (rides on a c ush ion of wate r in­
stead of the road surface), ESC wi ll not be
ab le to he lp you steer the veh icle because con-
Int ellig ent technolog y 195
tact with the pavement has been interrupted
and the vehicle cannot be braked or steered .
D uring fast corner ing, particular ly on wind ing
roads, ESC cannot always deal as effectively
with difficult dr iv ing s ituations than at lower
speeds. When towing a trailer, ESC is not able
to help you regain control as it would if you
were not tow ing a trailer.
Always adjust your speed and driving style to road, traffic and weather conditions . ESC can­
not override the vehicle's physical lim its, in­
crease the availab le tract ion, or keep a veh icle
o n the road if road departu re is a result of
driver ina ttent io n. Instead , ESC imp roves the
poss ibility of keep ing t he vehicle under con­
trol and on the road during extreme maneu­
vers by using the driver's steering i nputs to
help keep the vehicle go ing in the intended di­
rect ion. If you are traveling at a speed that
causes you to run off the road before ESC can
provide any assistance, you may not experi­
ence the benefits of ESC.
ESC is switched on all the time. In certain sit­
uat ions when you need less traction, you can
switch off ASR by pressing the butto n
[ill
~ page 197, fig. 182. Be su re to switch ASR
o n again when you no longer need less trac­
tion.
The following systems are integrated in the
ESC:
Anti-lock bra king sy stem (ABS )
ABS prevents the whee ls from locking up
when brak ing. T he vehicle can st ill be steered
even dur ing hard braking. App ly steady pres­
su re to the brake peda l. Do not pump the ped­
al. A pulsing in the brake pedal ind icates that
the system is helping you to brake the veh icle .
Brake assi st system
The brake ass ist system can decrease braking
distance. It increases brak ing power when the
drive r presses the brake peda l quickly in emer­
gency s ituations. You must press and hold the
brake pedal unti l the s ituation is over. In
vehicles wi th adap tive c rui se control*, the
brake assis t system is more sensitive if the
•
•

196 Intellig ent technolog y
distance detected to the veh icle a head is too
smal l.
Anti -slip regulation (ASR )
ASR reduces engine power when the drive
wheels begin to spin and adapts the force to
the road condit ions. This makes it eas ier to
start, accelerate and drive up hills.
Electronic differential lock (EDL )
The ED L brakes wheels that are spinn ing and
transfers the d rive power to the other wheels.
This f unct ion is not availab le at h igher speeds.
In extreme cases, EDL automat ically switches
off to help keep the brake on the braked whee l
from overheating. EDL w ill switch on aga in au­
tomatically when conditions have returned to norma l.
St eering recommendat ion
The ESC helps to stabilize the vehicle by
cha nging the steering to rque.
In vehicles with dynam ic steering*, ESC also
helps to stabilize the steering in critical s itua­
tions .
Select ive w heel to rque control
Selective wheel torque control is used when
driving on curves . The front wheel on the in­
side of the curve or both wheels on the inside
of the curve are braked selectively as needed.
This a llows more prec ise driving in curves. The
applicable system may not activate when d riv­
ing i n wet or snowy conditions.
.&_ WARNING
- T he ESC and its integrated systems can­
not overcome the limits posed by natural physical laws
. This is especially impor­
tant on slippery or wet roads. If the sys­ tems beg in acting to stabilize your vehi­
cle, you should immediately change your
speed to match the road and traffic con­
d itions . Do not let the increased safety
p rovided by these systems tempt you to
take risks. Do ing so will increase the ri sk
of a loss of veh icle cont ro l, collision and
serio us personal inj uries.
- Always adapt your speed to road, traffic
and weather conditions . The risk of los ­
ing control of the vehicle increases when
driving too fast , especially through
curves and on slippery or wet roads, and
when dr iv ing too close to vehicles up
ahead . The ESC and its integrated sys­
tems cannot a lways prevent collisions -
there is still a risk of acc idents!
- Always accelerate with special care on
even, smooth su rfaces such as those that
are wet or covered with ice and snow .
The drive wheels can spin even w ith
these assistance systems that c annot al­
ways he lp to red uce the risk of loss of ve­
h icle control.
(D Tips
- ABS and ASR only wo rk correctly when
all four wheels are equipped wi th iden ti­
cal tires. D ifferen t tire sizes can lead to a
reduction in engine power.
- Yo u may hear noises when the systems
descr ibed are workin g.
-If the ind icator light DJ or Ea (USA
mode ls)/ lCO j there may be a malfunction~
page 19,
<=>page 19.