2013 AUDI A4 warning light

160 Airbag system
dealer is familiar with these re quirements
and we recommend that you have your
dea ler perform this serv ice 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 pe rforms in a crash. For example, us ing
tire-r im combinations not app roved by Aud i,
lowering the vehicle, changing the stiffness of
the suspension, incl uding 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
un it. Some suspension changes can, for exam­
ple, increase the force levels measured by the
sensors a nd make the airbag system deploy in
crashes in w hich it would not dep loy if the
changes had not been made . Other kinds of
changes may reduce the force levels meas ­
ured by the sensors and prevent the airbag
from deploying when it should .
The sensors in the safety belt buckle fo r the
d river and front passe nger 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 poss ible that an a irbag
will not deploy at a seating position whe re the
safety belt is being used but will inflate at the
position whe re the safety belt is not bei ng
used. It is important tha t noth ing inte rfe re
with the safety belt buckles so t hat the sen­
sors can send the correct information a bout
safety belt use to the electronic contro l unit.
A WARNING
Changing the vehicle 's suspension includ­
ing use of unapproved tire-rim c ombina­
tions can change Advanced Airbag per­
formance and increase the risk of ser ious
personal i njur y in a crash.
- Never install suspension components
that do not have the same performance characterist
ics as the components origi­
na lly installed on your vehicle.
- Never use tire-rim com binations that
have not been approved by Audi.
A WARNING
= -
Items stored between the safety be lt
b uckle and the center console can cause
the sensors in the buckle to send the
wrong information to the e lectronic con­
trol module and prevent the Advanced Air­ bag System from wo rking prope rly.
- Always make s ure that nothing can inter­
fe re with the safety belt buckles and that
they are not obstructed.
Side airbags
Description of side airbags
The airbag system can provide supplemental
protection to properly restrained occupants.
F ig . 1 57 Side a irbag loca tion in t he drive r's seat
The side airbags are located in the sides of the
front seat backrests¢
fig. 157 and the rear
back rest facing the doors. They are ident ified
by the wo rd "AIRBAG".
The side airbag system basically consist s of:
- the electronic contro l modu le and external
side impact sensors
- the two airbags located in the s ides of the
front backrests and the two airbags* located
in the rear backrest
- the airbag warning light in the instrument
cluster .
T he air bag system is mon itored e lec tronically
to make ce rtain tha t it is function ing p roperly ..,.

at all times . Each time you turn on the igni­
tion, the airbag system indicator light will
come on fo r a few seconds (self diagnostics).
The s ide a irbag system supp lements 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 co llision. The airbag deploys
only in s ide impacts and on ly when the veh icle
acceleration registered by the control unit is h igh enough . If this rate is below the refer­
ence va lue programmed into the control 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
fine an ai rbag triggering range that will cover
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,
veh icle speed, etc.
c::> page 162, Important
safety instructions on the side airbag system.
Aside from the ir normal safety function, safe­
ty belts work to he lp keep the driver or front
passenger in posit ion in the event of a side
coll is ion so that the side a irbags can provide
p rotection.
The airbag system is
not a substitute for your
safety belt. Rather, it is pa rt of the overall oc­
cupant restraint system i n your veh icle . Al­
ways remember that the side airbag sys tem
can only help to p rotec t you if yo u are wear ing
your safety belt and wear ing it properly. This
is another reason w hy you sho uld a lways wear
your safety belts, not just beca use the law re­
q ui r es you to do so
c::> page 13 7, General
notes.
It is important to remember that while the
supp lemental side airbag system is designed
to reduce the like lihood of serious injur ies,
other in juries, for example, swell ing, bruising,
and minor abras ions can also be associated
with deployed s ide a irbags. Remember too,
side a irbags w ill deploy on ly once and o nly in
certain kinds of accidents - you r safety belts
are a lways there to offer prote ct io n.
A irbag system 16 1
Vehicle damage, repair costs o r even t he lack
of ve hicle damage are not necessarily a n indi­
cation o f ove r-sensitive or failed airbag activa ­
tion. In some coll is ions, both front and side
airbags may i nflate. Remember too, that air­
bags will deploy only o nce and only in certain
k inds of coll is ions -your safety belts are al­
ways t he re to offe r protection in those acc i­
den ts in which a irbags are no t supposed to
deploy or when they have a lready deployed .
The side airbag system will not deploy:
-when the ignit io n is turned off
- in side co llisions whe n the acceleration
measured by the 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 air bags and s ide airbags may be
trigge red togethe r.
&_ WARNING ~
- Safety belts and the airbag system wi ll
only provide protection when occupants
are in the proper seating position
c::> page 162.
- If the airbag ind icator light c::> page 20
comes when the veh icle is being used,
have the system inspected immediate ly
by your authorized Audi dealer. It is pos­
sible t hat the airbag will inflate when it
is not supposed to, or will not infla te
when it should. •
•

164 Airbag system
in a side collision. The side curtain airbag in­
f lates in side impacts and on ly when the vehi­
cle acce lerat ion reg istered by the contro l 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 a irbag tr igger ing range that will cover
every possible angle of impact , since the c ir­
cumstances w ill vary considerably between
one co llision and another . Important factors
include, for examp le, the nat ure (hard or soft)
of the impacting object, the ang le of impact,
vehicle speed, etc.
c:> page 164, How side cur­
tain airbags work.
Aside from their normal safety function, safe­
ty belts work to he lp keep the driver or front
passenger in position in the event of a co lli­
sion so that the side curtain airbags can pro­
vide p rotection .
The airbag system is not a subst itute for your
safety belt. Rather, it is part of the overall oc­
cupant restraint system in your veh icle. Al­
ways remember that the airbag system can
only help to protect you if you are wea ring
your safety be lt and wear ing it prope rly . T his
i s ano ther reason why you shou ld always wear
your safety be lts, not jus t beca use the law re­
qu ires you to do soc;,
page 13 7, General
notes.
It
is important to remember that while the
side curtain a irbag sys tem is designed to he lp
reduce the like lihood o f serious injuries, other
inj uries, for example, swelling, bruising, and
minor abrasions can also be associated with
these airbags. Remember too, these airbags
will dep loy only once and only in certain k inds
of acc idents - your safety belts are always
there to offer protection .
The side curtain airbag system b asic all y
consists of:
- The electronic control module and externa l
s ide impact sensors
- The side curtai n airbags above the front and
rear side w indows - The airbag indicator light in the instrument
panel
T he airbag system is mo nitored elec tronically
to make certain i t is func tioning properly at all
times . Each time you turn 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 tur ned off,
- in side co llisions whe n the accele ration
measured by the sensor is too low,
- in rear-end col lisions,
- in rollove rs .
A WARNING
-- Safety belts and the airbag system will
only provide protect ion when occupants
are in the proper seating posi tion
c:> page 58, Seats and s torage .
- If the ai rbag ind icator light c:> page 20
comes when the veh icle is being used,
have the system inspecte d immedia tely
by your author ized 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 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.
F ig . 1 60 Illustrat ion of p rin ciple: Inflated si de curtain
a irbags o n the left side
The side c urtain airbags inflate between the
occupant and the windows on the s ide of the
lill>-

-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 rearward-facing child safety
seat in a rear seating position and have
the airbag system inspected immediately by your authorized Audi dealer.
,& WARNING
If, in exceptional circumstances, you must
install a forward-facing child restraint on
the front passenger's seat:
- Always make sure the forward-facing
seat has been designed and certified by
its manufacturer for use on a front seat
with a passenger front and side airbag.
- Always follow the manufacturer's in­
structions provided with the child safety
seat or carrier.
- 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 installing
the child restraint. The backrest must be adjusted to an upright position .
- Always make sure that the
PASSENGER
AIR BAG OFF
light comes on and stays
on all the time whenever the ignition is
switched on.
@ Tips
Always replace child restraints that were
installed in a vehicle during a crash. Dam­
age to a child restraint that is not visible
could cause it to fail in another collision
situation.
Advanced front airbag system and children
Your vehicle is equipped with a front "Ad­
vanced Airbag System" in compliance with
United States Federal Motor Vehicle Safety
Standard (FMVSS) 208 as applicable at the
time your vehicle was manufactured .
Child Safety 167
The Advanced Airbag system in your vehicle
has been certified to meet the "low-risk" re­
quirements for 3- and 6-year old children on
the passenger side and small adults on the driver side. The low risk deployment criteria
are intended to reduce the risk of injury
through interaction with the airbag that can
occur, for example, by being too close to the
steering wheel and instrument panel when
the airbag inflates. In addition, the system
has been certified to comply with the "sup­
pression" requirements of the Safety Stand­
ard, to turn off the front airbag for infants up
to 12 months who are restrained on the front passenger seat in child restraints that are list­
ed in the Standard.
Even though your vehicle is equipped with an
Advanced Airbag system, all children, espe­
cially those 12 years and younger, should al­
ways ride in the back seat properly restrained
for their age and size . The airbag on the pas ­
senger side makes the front seat a potentially
dangerous place for a child to ride . The front
seat is not the safest place for a child in a for­
ward-facing child safety seat. It can be a very
dangerous place for an infant or a larger child
in a rearward-facing seat.
Advanced Airbags and the weight­
sensing mat in the front seat
The Advanced Airbag System in your vehicle
detects the presence of an infant or child in a
child restraint on the front passenger seat us­
ing the weight-sensing mat in the seat cush­
ion and the sensor below the safety belt latch
on the front passenger seat that measures the
tension on the safety belt.
The weight-sensing mat measures total
weight of the child and the child safety seat
and a child blanket on the front passenger
seat. The weight on the front passenger seat
is related to the design of the child restraint
and its "footprint", the size and shape of the
bottom of the child restraint as it sits on the
seat. The weight of a child restraint and its "footprint" vary for different kinds of child re -
straints and for the different models of the ..,. •
•

-Model Manufactured on or
after
Graco Snugride September 25, 2007
Peg Perego Primo V i- September 25, 200 7
aggio SIP I MUN00US
Subpart C -Forward-facing and
con vertible child r estra ints
Model Manufactured on or
after
Britax Roundabout September 25, 2007
E9L02xx
Cosco Touriva 02519 December 1, 1999
Cosco Summit Deluxe September 25, 2007
High Back Booster
22-262
Cosco High Back September 25, 2007
Booster 22-209
Evenflo Tribute V September 25, 2007
379xxxx
Evenflo Medallion December 1, 1999
254
Evenflo Generations September 25, 200 7
352xxxx
Graco ComfortSport September 25, 2007
Graco Toddler Safety September 25, 2007
Seat Step 2
Graco Platinum Cargo September 25, 2007
A WARNING
T o reduce the risk of serious injury, make
sure that the
PASSENGER AIR BAG O FF
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 fro nt pas­
senger seat and install it properly at one of the rea r seat positions if the
PASSEN­
GER AIR BAG OFF
light does not stay on.
- Have the airbag system inspected by
your authorized Aud i dealer immediate­
ly.
Child Sa fet y 169
'
(D Tips
The child seats listed in categories A to C
have been statically tested by A udi on ly for
the Advanced A irbag function.
Important safety instructions for using
child safety seats
Correct use of child safety seats substantially
reduces the risk of injury in an accident!
As the dr iver, you are responsib le for the safe­
ty of everybody in the vehicle, especially ch il­
dren:
... Always use the right chi ld safety seat for
each child and always use it properly
¢page 172 .
... Always carefully fo llow the child safety seat
manufacturer's instruct ions on how to route
the safety belt properly through the child
safety seat.
... When usi ng the veh icle safety belt to ins tall
a child safety se at, you m ust first activate
the convertib le locking retractor on the
safety belt to prevent the child safety seat
from moving
¢ page 176.
... Push the ch ild safety seat down with your
full weight to get the safety be lt really tight
so that the seat cannot move forwa rd or
sideways mo re than one inch (2 .5 cm) .
... If a strap o r tethe r is be ing used to tie the
child safety seat to the fron t passenger
s eat , make sure tha t it is not so tight that it
causes the weight-sensing mat to measure
more weight than is act ually on the seat.
... Sec ure unused safety belts on the rear seat
¢ page 171.
Always remember : Even tho ugh yo ur vehicle is
equipped with an Advanced Airbag system, all c h il dren, especially those 12 years and young­
er, shou ld always r ide in the back seat proper -
ly restra ined for the ir age and size. .,_ •
•

range, and as far away from the a irbag
as poss ible before instal ling the child
restraint.
- Always make sure that nothing pre­
vents the front passenger's seat from be ing moved to the rearmost position
i n its fore and aft adjustment range.
- Always make sure that the backrest is
in the upr ight position.
- Always buckle the child safety seat firmly
in place even if a child is not sitting in it.
A loose ch ild safety seat can fly around
dur ing a sudden stop or in a coll is ion .
- Always read and heed all WARNINGS
whenever using a child restrained in ave­
hicle is being used
c:::;,page 137, Safety
belts,
c:::;, page 145, Airbag system and
¢ page 166, Child Safety.
.8, WARNING
To reduce the risk of serious injury, make
sure tha t the
PASSENGER AIR BAG OFF
light comes on and stays on whenever a
child rest raint 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 proper ly 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 Aud i dealer immediate­
ly.
Secure unused safety belts on the rear
seat
F ig. 161 Schematic overview: kee p un used safety be lts
away from chil dren in child safe ty seats. @-oute r rear
safety be lt,
@ -center rear safety belt
.
Child S afety 1 71
If a child safety seat is used on the rea r bench,
especially with LATCH universal lower ancho­
rages, the unused safety belts
must be se ­
cured so that the child in the child restraint
cannot reach them
c:::;, &,.
- Guide the safety belt webbings @and @
beh ind the head restraint of the seat where
the child restra int is insta lled
c:::;, fig. 161.
When doing so, do not engage the switcha­
ble locking retractor! You shou ld not hear a
"cl icking" sound when w inding up the safety
be lt .
- Let the belt retractor wind up the safety belt
webbing.
.8, WARNING
A child in a chi ld safety seat i nstalled with
the LA TCH lower ancho rages or with the
standard s afety be lt or a child in a boos ter
seat on the rea r seat co uld p lay with un­
use d rea r seat safety belts and become en­
tang led . This could cause t he chi ld ser ious
personal injury and even death.
- Always secure unused rear seat safety
be lts out of reach of children in child
seats such as by proper ly rout ing t hem
around the head restrai nt of the seat
where the ch ild restraint is installed.
- Never activate t he switchable l ock ing re­
tracto r when routing the safety be lts
arou nd the head restraints.
- Never let anyone s it at the center rear
seating position if the center rea r safety
be lt has been routed around a rear head
restraint.

17 2 Child Safety
Child safety seats
Infant seats
Babies and infants up to about one year old
and 20 lbs. or 9 kg need special rearward-fac­
ing child restraints that support the back,
neck and head in a crash.
-- /
Fig . 162 Schematic overv iew: rearwa rd -fac ing infant
seat, properly installed on the rear seat
> When using the vehicle safety belt to install
a ch ild safety seat, you must first activate
the convertible locking retractor on the
safety belt to prevent the child safety seat
from moving ¢
page 176 or install the seat
using the LATCH attachments .
> Push the child safety seat down with your
full weight to get the safety belt really tight
so that the seat cannot move forward or
s idew ays more than one inch (2.5 cm).
> Secure unused safety belts on the rear seat
¢page 171.
Infants up to about one year (20 lbs. or 9 kg)
are best protected in special infant carriers
and child safety seats designed for their age
group . Many experts believe that infants and
small children should ride only in spec ial re­
straints in which the chi ld faces the back of
the vehicle . These infant seats support the ba­
by's back, neck and head in a crash ¢
fig. 162.
The airbag on the passenger side makes the
front seat a potentially dangerous place for a
child to ride . The front seat is not the safest
p lace for a child in a forwa rd-facing child seat.
I t is a very dangerous p lace for an infant or a
larger child in a rearward-facing seat.
A WARNING
-Not using a child safety seat, using the
wrong child safety seat or improperly in­
stalling a ch ild restra int increases the risk
of ser ious personal injury and death in a
crash.
- Never install rearward-facing child safety
seats or infant ca rr ie rs on the front pas­
senger seat -even with an Advanced Air­
bag System. A child will be ser iously in­
jured and can be killed whe n the inflat ­
ing airbag hits the child safety seat or in­
fant carrier with great force and smashes the child safety seat and child against
the backrest, center armrest, door or roof¢
page 146, Child restraints on the
front seat -some important things to
know.
- Always install rearward-facing ch ild safe­
ty seats or infant carriers on the rear seat.
- Never install a rearward-facing ch ild re­
straint in the forward-facing direction .
Such rest ra ints are designed for the spe­
cial needs of infants and very smal l chil­
dren and cannot protect them properly if
the seat is forward-facing.
-If you must install a rearward facing
chi ld safety seat on the front passenger
seat because of exceptiona l circumstan ­
ces and the
PASSENGER AIR BAG OFF
light does not come on and stay on, im­
mediately install the rearward-fac ing
child safety seat in a rear seating posi­
tion and have the airbag system inspect­
ed by your authorized Aud i dealer .
- Always read and heed all WARNINGS
whenever using a child restrained in ave­
h icle is being used
¢page 137, Safety
belts,
¢ page 145, Airbag system and
¢ page 166, 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 . 163 Sche mati c overvi ew : ins tallat ion o f the at­
tachments appl icable to a LA TCH seat
F ig. 164 Schem atic overview: installat ion of t he seat
u sing the ve hicle' s safety b elt sy stem
.. When using the vehicle safety be lt to insta ll
a chi ld safety seat, you must f irst activate
the convertible locking feature on the safety
belt to prevent the child safety seat from
moving
c::> page 176 or install the seat using
the LATCH attachments .
.,. Push the child safety seat down w ith your
full weight to get the safety belt really t ight
so that the seat cannot move forward or s ideways more than one inch (2.5 cm)
c:;, page 176.
.,. If the child safety seat is equ ipped with a
tether strap, attach it to the tether anchors
c:;, page 182 .
.. Secure unused safety belts on the rear seat
c:;, page 171.
A toddler or child is usually too large for an in­
fant restraint if it is more than one year o ld
and weighs more than 20 lbs. (9 kg) . Child S
afety 173
Toddlers and children who are older than one
year up to about 4 years old and weigh more
than 20 lbs. (9 kg) up to 40 lbs. (18 kg) must always be properly restrained in a child safety
seat cert ified for their si ze and weight
c:;, fig . 163 and c:;, fig. 164 .
The airbag on the passenger side makes the
front seat a potentially dangerous place for a
child to ride . The front sea t is not the sa fest
place for a child in a forward -facing child safe ­
ty seat .
It is a very dangerous place for a n in­
fant or a large r ch ild in a rearward-facing seat .
.&_ WARNING
Not using a child safety seat, using the
wrong child s afety seat o r imprope rly in­
stalling a chi ld restraint increases the risk
of serious personal injury and death in a
collision or other emergency situation .
- Ch ildren on the front seat of any car,
even with Advanced Airbags, can be se ri­
ously injured or even killed when an air­ bag inflates. A child in a rearward-facing
child safety seat installed o n the front
passenger seat will be serious ly injured
and can be k illed if the front airbag in­
flates -even with an Advanced Airbag
System .
- The inflating airbag will h it the ch ild
safety seat or infant carrier with great
force a nd will smash the child safety seat
and child against the backrest, center
a rmrest, doo r or roof.
- Always install rearw ard-f acing ch ild safe­
ty seats on the rear seat.
- I f you must install a rearwa rd fac ing
child safety seat on the fro nt passenger
seat because of exceptional circumstan­
ces and t he
PASSENGER AIR BAG OFF
light does not come on and stay on, im­
mediately insta ll the rearward-fac ing
child safety seat in a rear seating posi­
tion and have t he airbag system inspect­
ed by your authorized Audi dealer .
- The rear side of the child safety seat
should be pos itioned as close as possib le
~