2014 AUDI S4 Owners Manual

possible that the airbag will inflate when
it is not supposed to, or will not inflate
when it should.
A WARNING
If the front airbag inflates, a ch ild without
a c hild restra int, in a rearward-facing c hild
safety seat or i n a forward-facing child re­
st raint that has not been properly insta lled
w ill be seriously injured and can be k illed.
- Even though your veh icle is equipped
with an Advanced Airbag System, make certain that a ll children, especially 12
years and younge r, a lways ride on the
back seat properly restrained fo r their
age and size.
- Always instal l forw ard or rea r-facing
child safety seats on the rear seat -even
with an Advanced Airbag System.
- If you mus t install a rearward -facing
child safety seat on the front passenger
seat because of exceptional circ umstan­
ces and the
PASSENGER AIR BAG OFF
light does not appear and stay on, imme ­
diately install the rear-fac ing ch ild safety
seat in a rear seating position and have
the a irbag system inspected by you r au­
tho riz ed Aud i dea le r.
- A tight tether or other strap on a rear­
wa rd-fac ing child restra int attached to
the fro nt passenger sea t can put too
much pressure on the weight-sens ing
mat in the seat and register mo re weight
than is ac tually on the seat. The heavier
weight registe red can make the system
wor k as though an adu lt were on the seat
and dep loy the Advanced Airbag when it
must be suppressed caus ing serious or
even fatal injury to the child .
- If, in exceptional circumstances, you
must install a forward-facing child re­
st rain t on the front passenger seat, a l­
ways move the seat into its rearmost po­
sit ion in the seat's fo re and aft adjust­
ment r ange, as far away from the airb ag
as possib le. The backrest m ust be adjus t­
ed to an upr ight position. Make sure that
A irbag system 159
the PASSENGER AIR BAG OFF light
comes on and stays on all the time when­
ever the ignition is switched on.
A WARNING
-
- If the PASSENGER AIR BAG OFF light
does not go out when an adult is sitting
on the front passenger seat after tak ing
the steps described above, make su re the
adu lt is prope rly seated and restra ined at
one o f the rea r seat ing pos itions.
- Have the airbag system inspected by
your author ized Audi dealer befo re trans­
port ing anyone on the front pas senger
seat.
@ Tips
If t he weig ht-sensing mat in the front pas­
senger seat detects an empty sea t, the
front airbag on the p assenger side will be
turned off, and
PASSENGER AIR BAG OFF
will stay on .
Repair, care and disposal of the airbags
Parts of the airbag system are installed at
many different p laces on your Aud i. Insta lling,
removing, servicing or repa iring a part in an
area of the vehicle can damage a part of an
a irbag system and p revent that system from
working p rope rly in a coll is ion.
There are some important t hings you have to
k n ow to make sure that the effectiveness of
t h e system w ill not be impaired and that d is­
ca rded components do not cause injury o r pol­
l ute the environment.
A WARNING
Im proper care, serv icing a nd rep air proce­
d ur es can increase the risk of personal in ­
ju ry and death by preventing an a irbag
from deploying when needed or deploying
an a irbag unexpectedly:
- Never cover, obst ruct, or change the
steer ing whee l horn pad or airbag cover
or the instrument panel or mod ify them
in any way. •
•

160 Airbag system
-Never attach any objects such as cu­
pholders or telephone mountings to the
surfaces covering the airbag units.
- For cleaning the horn pad or instrument
panel, use only a soft, dry cloth or one
moistened with plain water. Solvents or
cleaners could damage the airbag cover
or change the stiffness or strength of the
material so that the airbag cannot de­
ploy and protect properly.
- Never repair, adjust, or change any parts
of the airbag system .
- All work on the steering wheel, instru­
ment panel, front seats or electrical sys­
tem (including the installation of audio
equipment, cellular telephones and CB
radios, etc.) must be performed by a
qualified technician who has the training
and special equipment necessary.
- For any work on the airbag system, we
strongly recommend that you see your
authorized Audi dealer or qualified work­
shop.
- Never modify the front bumper or parts
of the vehicle body.
- Always make sure that the side airbag
can inflate without interference:
- Never install seat covers or replace­
ment upholstery over the front seat­
backs that have not been specifically
approved by Audi.
- Never use additional seat cushions that
cover the areas where the side airbags
inflate.
- Damage to the original seat covers or
to the seam in the area of the side air­
bag module must always be repaired
immediately by an authorized Audi
dealer.
- The airbag system can be activated only
once. After an airbag has inflated, it
must be replaced by an authorized Audi
dealer or qualified technician who has
the technical information, training and
special equipment necessary.
- The airbag system can be deployed only once. After an airbag has been deployed,
it must be replaced with new replace- ment parts designed and approved espe­
cially for your Audi model version . Re­
placement of complete airbag systems
or airbag components must be per­
formed by qualified workshops only. Make sure that any airbag service action
is entered in your Audi Warranty
& Main­
tenance booklet under
AIRBAG REPLACE­
MENT RECORD.
- In accidents when an airbag is deployed,
the vehicle battery separates the alterna­
tor and the starter from the vehicle elec­
trical system for safety reasons with a pyrotechnic circuit interrupter.
- Work on the pyrotechnic circuit inter­ rupter must only be performed by a
qualified dealer -risk of an accident!
- If the vehicle or the circuit interrupter
is scrapped, all applicable safety pre­
cautions must be followed.
@ For the sake of the environment
Undeployed airbag modules and preten­
sioners might be classified as Perchlorate
Material -special handling may apply, see
www .dtsc.ca.gov/hazardouswaste/per­
chlorate. When the vehicle or parts of the restraint system including airbag modules
safety belts with pretensioners are scrap­
ped, all applicable laws and regulations
must be observed. Your authorized Audi
dealer is familiar with these requirements
and we recommend that you have your
dealer perform this service for you.
Other things that can affect Advanced
Airbag performance
Changing the vehicle's suspension system can
change the way that the Advanced Airbag Sys­
tem performs in a crash. For example, using
tire-rim combinations not approved by Audi, lowering the vehicle, changing the stiffness of
the suspension, including the springs, suspen­
sion struts, shock absorbers etc. can change
the forces that are measured by the airbag sensors and sent to the electronic control
unit. Some suspension changes can, for

example, increase the force levels measured by the sensors and make the airbag system
deploy in crashes in which it would not deploy if the changes had not been made. Other
kinds of changes may reduce the force levels
measured by the sensors and prevent the air ­
bag from deploying when it should.
The sensors in the safety belt buckle for the
driver and front passenger seat tell the elec­
tronic control module if the safety belt is
latched or not. If the safety belt is being used,
the front airbag will deploy at a slightly high­
er rate of vehicle deceleration than if the safe­
ty belt is not being used. Therefore, in a par­
ticular collision, it is possible that an airbag
will not deploy at a seating position where the
safety belt is being used but will inflate at the
position where the safety belt is not being
used.
It is important that nothing interfere
with the safety belt buckles so that the sen­
sors can send the correct information about
safety belt use to the electronic control unit .
& WARNING
Changing the vehicle's suspension includ­
ing use of unapproved tire-rim combina­
tions can change Advanced Airbag per­
formance and increase the risk of serious personal injury in a crash.
- Never install suspens ion components
that do not have the same performance characteristics as the components origi­
nally installed on your vehicle.
- Never use tire-rim combinations that
have not been approved by Audi.
A WARNING 1= -
Items stored between the safety belt
buckle and the center console can cause
the sensors in the buckle to send the
wrong information to the electronic con­
trol module and prevent the Advanced Air ­
bag System from working properly.
- Always make sure that nothing can inter-
fere with the safety belt buckles and that
they are not obstructed.
Airbag system 161
Side airbags
Description of side airbags
The airbag system can provide supplemental
protection to properly restrained occupants .
Fig. 157 Side a irbag locatio n in the driver 's seat
~ co Q)
The side airbags are located in the sides of the
front seat backrests~
fig. 157 and the rear
backrest facing the doors. They are identified
by the word "AIRBAG".
The side airbag system basically consists of:
- the electronic control module and external
side 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 monitored electronically
to make certain that it is functioning properly
at all times . Each time you turn on the igni­
tion, the airbag system indicator light will
come on for a few seconds (self diagnostics).
The side airbag system supplements the safe­
ty belts and can help to reduce the risk of in­
jury to the driver's and front passenger's up­
per torso on the side of the vehicle that is
struck in a side collision. The airbag deploys
only in side impacts and only when the vehicle
accelerat ion registered by the control unit is
high enough. If this rate is below the refer­
ence value programmed into the control unit,
the side airbags will not be triggered,
even
though the car may be badly damaged as a re­
sult of the collision . It is not possible to de -
fine an airbag triggering range that will cover
II>

162 Airbag system
every possible angle of impact, since the cir­
cumstances wi ll vary considerably between
one co llision and another. Important factors
include, for examp le, the nature (hard or soft)
of the impacting object, the angle of impact,
vehicle speed, etc. c::>
page 163, Important
safety instructions on the side airbag system.
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 side
coll is io n so that the side a irbags can provide
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 ve hicle. Al­
ways remember that the side airbag system
can only help to protect you if you a re wearing
your safety be lt and wear ing it prope rly . T his
is another reason why you should a lways wear
your safety belts, not just because the law re ­
quires you to do soc::>
page 138, General
notes.
I t is important to remember that while the
supp lemental side airbag system is designed
to reduce the likelihood of serious injuries,
othe r injuries, for example, swell ing, bruising,
and minor abrasions can also be associated
wi th deployed side airbags. Remember too,
side airbags will deploy on ly once and on ly in
certain k inds of acc idents -your safety belts
are a lways there to offer protect ion.
Vehicle damage, repair costs or even the lack
of vehicle damage are not necessari ly an indi ­
cation of over-sensit ive or failed airbag activa­
tion . In some co llisions, both front and s ide
a irbags may inflate. Remember too , that air­
bags will deploy only once and only in certa in
kinds of collisions -your safety belts are al­
ways there to offer protection in those acci­
dents in which airbags are not supposed to
deploy or when they have already deployed.
The side airbag syst em will not depl oy:
- when the ign ition is turned off
- i n s ide collisions when the accelerat ion
measured by the sensor is too low
- i n front-end co llisions -
in rear -end collisions
- in rollovers.
In some types of accidents the front airbags,
s ide curtain airbags and s ide a irbags may be
t rigge red togethe r.
_&. WARNING
- Safety belts and the airbag system wil l
only provide protection when occupants
are in the proper seating position
c::> page 163.
-If the airbag indicator light r:!:> page 20
comes when the vehicle is being used,
have the system inspected immediately
by y our authorized A udi dealer . It is pos­
sible that the airbag will inflate when it
is not supposed to, or will not inflate
when it should.
How supplemental side airbags work -
Side airbags deploy instantly and can help re­
duce the risk of upper torso injuries for occu­
pants who are properly restrained .
Fig. 158 In flated side a irbags o n left s ide of ve hicle
When the system is trigge red, the a irbag is
filled wi th propellan t gas an d breaks through
a seam in the seat surface area marked "AIR­
BAG". It expands between the side trim panel
and the passenger. In order to help provide
t h is addit ional protec tion, the side airbag
must inflate within a fraction of a second at
very h igh speed and with great force . The sup ­
plementa l side airbag could injure you if your
seat ing pos ition is not proper or up right or if
items are located in the area where the s up­
pleme ntal side airbag expands. This applies
especially to ch ild ren
c::> page 16 7, Child ..,.

Safety. Supplemental side airbags inflate be­
tween the occupant and the door pane l on the
side of the vehicle that is struck in certain s ide
collis ion¢
fig. 158 .
Although they a re not a soft pillow, they can
"cushion" the impact and in this way they can he lp to reduce the r isk of injury to the upper
part of the body.
A fine dust may develop when the airbag de­ p loys. This is norma l and does not mean there
is a fire in the veh icle .
Important safety instructions on the
side airbag system
Airbags are only supplemental restraints. Al­
ways properly wear safety belts and ride in a
proper seating position .
There is a lot that you and your passengers
must know and act accordingly to help the
safety belts and a irbags do the ir job to pro­
vide supplemental protection .
A WARNING
An inflating side airbag can cause ser ious
or fatal injury. Improperly wearing safety
belts and improper seating positions in­
crease the risk of ser ious personal inju ry
and death whenever a vehicle is being
used.
- In orde r to reduce the risk of injury when
the supplemental side airbag inflates :
- Always sit in an upright pos ition and
never lean against the area where the
supp lemental s ide a irbag is located.
- Never let a chi ld or anyone else rest
their head against the side trim panel
in the area where the supp lemental
side ai rbag inflates.
- Always make sure that safety belts are
wo rn correctly,
- Do not let anyone sitting in the front
seat put their hand or any other parts
of their body out of the window.
- Always make sure that the side airbag
can inflate witho ut interference.
A irbag system 163
-Never install seat covers or rep lace­
ment upholstery over the front seat­
backs that have not been specifically
approved by Audi.
- Never use additional seat c ushions that
cover the areas where the side a irbags
deploy.
- Damage to the orig inal seat cove rs or
to the seam in the area of the side a ir­
bag module must always be repaired
i mmediately by an author ized Audi
dealer.
- Objects between you and the airbag ca n
increase the risk of injury in an accident
by inter fer ing with the way the airbag
unfo lds o r by being pushe d in to yo u as
the airbag inflates .
- Never place or attach accessor ies or
othe r objects (such as cupho lders, tele­
phone brackets, or even large, bu lky
objects) on the doo rs, over or near the
area marked "A IRBAG" on the seat
bac krests.
-Such objects a nd accessories can be­
come dangerous project iles and cau se
i njury when the s upplementa l side air­
bag deploys .
- Never carry any ob je cts o r pe ts in the
deployment space be twee n them and
the airbags or allow ch ild ren or other
passengers to trave l in t his position.
- Always use the b uilt-in coat hooks on ly
for lightweight clo thing . Never leave any
heavy or sharp-edged objects in the
pockets that may interfere w ith side air­
bag deployment and can cause personal
injury in an acc ident.
- Always prevent the side airbags from be­ ing damaged by heavy objects knocking
aga inst or hitting the sides of the seat­
backs .
- The airbag system can only be triggered
once . If the airbag has been triggered,
the system must be replaced by an au­
thorized Audi dealersh ip.
- Damage (cracks, deep scratches etc .) to
the o rig inal seat cove rs or to the seam i n
the area of the side airbag module must .,,. •
•

164 Airbag system
always be repaired immediately by an au­
thorized Aud i dealer.
- If children are seated improper ly, their
risk of injury increases in the case of an
acc ident¢
page 167, Child Safety.
- Never attempt to modify any compo­
nents of the airbag system in any way.
- In a side co llision, side a irbags will not
function properly if sensors cannot cor­
rect ly measure increasing air pressure in­
side the doors when air escapes through
larger, unclosed openings in the door
panel.
- Never drive with interior door trim pan­
e ls removed .
- Never drive w hen parts have been re­
moved from the inside door panel and
the openings they leave
have not been
properly closed.
- Never drive when loudspeakers in the
doors have been removed unless the
speaker holes have been properly
closed.
- Always make certain that openings are
covered or filled if additional speakers
or other equ ipment is installed in the
ins ide door panels.
- Always have work on the doors done by
an author ized Audi dealer or qualified
workshop .
Side curtain airbags
Description of side curtain airbags
The side curtain airbag system can provide
supplemen tal prote ction to properly restrain­
ed occupan ts.
Fig . 159 Side curtain system, dr ive r's s ide: s ide curtain
a irbag locat ion
T he side curtain airbags are located on both
sides of the interior above the front and rear
side windows ¢
fig. 159. They are identified
by the word "AIRBAG" on the windshield
frame and the center roof pillar .
T he side curtain airbag system supplements
the safety belts and can help to reduce the risk of in jury for occupants' heads and upper
torso on the side of the vehicle that is struck in a side coll ision . The side cu rtain airbag in ­
flates in side impacts and only when the vehi­ cl e acceleration registered by the control un it
is h igh eno ugh . If this rate is below the refer­
ence value p rogrammed in to the co ntrol uni t,
the side ai rbags wi ll not be triggered, even
though the car may be bad ly damaged as a re­
s ul t of the co llision. It is not possib le to de­
fine an airbag triggering range that will cover every possib le ang le of impact, since the cir­
cumstances will vary cons iderably between
one collis ion a nd another . Important factors
i nclude, fo r example, the nature (hard or soft)
of the impacting object, the angle of impact,
vehicle speed, etc. ¢
page 165, How side cur­
tain airbags work .
Aside from their normal safety function, safe­
ty belts work to help k eep the drive r or front
passenge r in position in t he event of a coll i­
s io n so that the s ide cur tain airbags can pro ­
vide protection.
T he airbag system is not a substit ute for your
safety belt . Rather, it is part of the overa ll oc­
c u pan t restra int system in yo ur vehicle. Al­
ways remember that the a irbag system can
only he lp 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¢
page 138, General
notes .
It is important to remember that wh ile the
side curtain airbag system is designed to help
reduce the likelihood of ser ious injuries, other
i njur ies, for example , swelling, bru is ing, and
minor abrasions can also be assoc iated with
these a irbags. Remember too, these airbags
will deploy only once and on ly in ce rtain kinds
lill>

of accidents - your safety belts are always
there to offer protection .
The side curtain airbag system basically
consi sts of :
- The electronic control mod ule and externa l
side impact sensors
- The side curtain airbags above the front and
rear side windows
- T he airbag ind icator light in the ins trument
panel
The airbag system is monitored elect ron ica lly
to make certa in it is f unct ion ing properly at a ll
times. Eac h time you t urn on the ign ition, the
ai rbag system indicator light will come on for
a few seconds (se lf diagnostics) .
The side curtain airbag is not activated:
-if the igni tion is turned off,
- in s ide collisions when the accelerat ion
measured by the sensor is too low,
- in rear -end collisions,
- in ro llovers.
_&. WARNING
- Safety belts and the a irbag system will
only p rov ide p rotection whe n occ upants
are in the p roper seating posit ion
~ page 58, Seats and storage.
- If the airbag indicato r light~ page 20
comes when the vehicle is being used,
have the sys tem inspected immediately
by your aut ho rized Aud i dea le r.
It is pos­
sible that the a irbag will inflate when it
is not s upposed to, or wi ll not inflate
when it sho uld .
A irba g sy stem 165
How side curtain airbags work
Side curtain airbags can work together with
side airbags to help reduce the risk of head
and upper torso injuries for occupants who
are properly restrained.
Fig. 1 60 Illus trati on of pr in cip le: Inflat ed s ide curtain
airbags o n the left side
The side curtain airbags inflate between the
occupant and the windows on the s ide of the
vehicle that is struck in a side coll is ion
~ fig . 160.
When the system is trigge red, the side curta in
airbag is filled with prope llant gas and breaks
t hr ough a seam above the front and rear side
windows iden tified by the AIRBAG labe l. In or­
der to he lp prov ide this additional protection,
the side curtain ai rbag m ust inflate within the
blink of an eye at very high speed and with
great force. The side curtain a irbag co uld in­
jure you if your seating position is not proper
or upright or if items are located in the area
where the supplemental side curta in a irbag
inflates . This applies especially to ch ild ren
~ page 167.
Although they are not a soft pillow, side cur­
tain a irbags can "cushion " the impact and i n
th is way they can help to reduce the risk of in­
jury to the head and the uppe r part of the
body .
A f ine dust may deve lop when the airbag de­
ploys . T his is quite normal and does not mean
there is a fire in the vehicle.

166 Airbag sys te m
Important safety instructions on the
side curtain airbag system
Airbags are only supplemental restraints. Al­
ways properly wear safety belts and ride in a
proper seating position.
There is a lot that you and your passengers
must know and do to help the safety belts and
a irbags do the ir job to prov ide s upplement al
protection.
_&. WARNING
-
Improperly wearing safety belts and im­
proper seating positions increase the risk
of serious personal injury and death when­
ever a veh icle is being used.
- Never let occ upants p lace any parts of
their bodies in the area from wh ich the
side curtain airbags inflate.
- Always make sure that the side curtain
airbags can inflate w ithout interference.
Unsuitable accessories fitted inside the
expansion range of a head a irbag can
dangerously interfere w ith its function . A
deploying head a irbag develops enough
force to catapult any piece of add-on
component out of its pa th of inflation
and into the passenger compartment. An
occupant hit by such a projectile can suf­
fer serio us injury or death
¢ page 2 78,
Technical Modifications.
- Do not swivel the sun visors to the side if
yo u have any objects clipped onto them
(for example pens).
If the a irbag should
deploy, you could be injured by these ob­
jects.
- Use the built-in coat hooks only for light­
weight cloth ing. Never leave any heavy or
sharp-edged objects in the pockets that
may interfere with airbag deployment
and can cause pe rsonal injury in an acci­
dent.
- Never use hange rs to hang clothing from
the hooks.
- Only use factory-installed sun shades or,
in the case of shades installed after the
vehicle leaves the fac to ry, only Audi roll­
up sunsc reens m ay be used~
page 277,
Additional accessories and parts re­
placement.
-Always sit in p roper seating position and
wear safety belts wh ile traveling so that
the side curtain airbags can help prov ide
protection.
- The airbag system can only be triggered
once. If the airbag has been triggered,
the system must be replaced by an au­
thor ized Audi dealer or qualified work­
shop.
-Always have work involving the side cur­ tain airbag system, removal and installa­
tion of the airbag components, or other repairs performed by an authorized Audi
deale r o r qualified workshop. O therwise
the air bag system may not work co rrec t­
ly.
- Never attempt to mod ify any compo­
nents o f the ai rbag system in any way.