2018 AUDI A4 Owners Manual

Airbag system
In addition to their normal safety function, safe­
ty belts help keep the driver or front passenger in
position in a frontal collision so that the airbags
can provide supplemental protection.
The airbag system is not a substitute for your
safety belt. Rather, it is part of the overa ll occu­
pant restraint system in your vehicle. Always re­
member that the airbag system can only help to
protect you if you are wearing your safety belt
and wearing it properly . This is why you should
always wear your safety belt, not just because
the law requires you to do so ¢
page 263, Gener­
al information.
Remember too, airbags will deploy only once and
only in certain k inds of accidents - your safety
belts are always there to offer protection in those
accidents in which airbags are not supposed to
deploy or when they have already deployed, for
examp le when your vehicle str ikes or is struck by
another after the first collision .
This is jus t one of the reasons why an airbag is
not a substitute for the safety belt. The a irbag
system works most effectively when used with
the safety belts. Therefore, always wear your
safety belts correct ly.
It is important to remember that while the sup­
p lemental knee airbag system is designed to re­
duce the likelihood of serious injuries, other inju ­
ries, for example, swe lling, bruising and minor
abrasions and friction burns can also occur when
an airbag inf lates .
The knee airbag system basically consists of:
- T he electronic control module
- T wo inflatab le airbags (airbag and gas genera-
to r), one for the driver and one for the front
pass enger
- The airbag indicator ligh t in the instrument
panel
The knee airbag system will not deploy:
-whe n the ignition is switched off
- in frontal collisions when the deceleration
measured by the control un it is too low
- in side collisions
- in rea r-end collisions
288
-in rollovers
- in the event of a system malfunction (warning/
ind icator light is on)
¢page 32 .
A WARNING
-Safety belts and the airbag system can only
provide protection when occupants are in
the proper seating
position ¢ page 281 .
-If the airbag indicator light ¢ page 32
comes when the veh icle is being used, have
the system inspected immediately by your
author ized Audi dealer. It is possible that
the airbag will inflate when it is not sup­
posed to, or will not inflate when it should.
How knee airbags work
The risk of injury to the leg area con be reduced
by fully inflated knee airbags.
Fig. 243 In flated a irbags protect ing in a fro nta l coll ision
The knee airbag system has been designed so
that the airbags for the dr iver and front passen­
ger dep loy in certain but not all fronta l collisions .
If the front airbags deploy, the knee airbags also
deploy in frontal collisions when the deployment
threshold stored in the control unit is met .
When the system deploys, the airbags fill with a
prope llant gas, and inflate between the lower
part of the instrument panel and the driver and
the lower part of the instrument panel and the
front passenger
¢page 281, fig. 240 .
Although they are not a soft pillow, they can
"cushion" the impact and in this way they can
help to reduce the risk of injury to the lower ex­
tremities.

All of this takes place in the blink of an eye, so
fast that many people don't even realize that the airbags have deployed . The airbags also inflate
with a great deal of force and it is important for
occupant safety that nothing should be in their
way when they deploy .
Fully inflated airbags in comb ination with proper­
ly worn safety belts slow down and limit the oc­
cupant 's forward movement and help to reduce
the r isk of injury .
Important safety instructions on the knee
airbag system
Airbags are only supplemental restraints . Always
wear safety belts correctly and ride in a proper
seating position.
There is a lot that you and your passengers must
know and do to help the safety be lts and airbags
to provide s upplemental protection .
,& WARNING
An inflating knee airbag can cause ser ious in­
jury. Wearing safety bel ts incor rectly and im­
proper seating posit ions increase the r isk o f
serious personal injury and death whenever a
vehicle is being used.
- The knee airbag system cannot protect you
prope rly if you are seated too close to any of
the a irbag locat ions. When ad justing their
seat positions, it is important that both the
dr iver and the front passenger keep their
upper bod ies a nd knees at the following
min imum safe d istances:
- at least 10 inches (25 cm) between the
chest and the steering wheel/instrument
panel.
- at least 4 inc hes (10 cm) between the
knees and the lower part of the instru­
ment panel.
- The risk of persona l injury increases if you
lean forward or to the side, or if the seat is
improper ly positioned and you are not wear­
ing your safety belt. The risk increases even
more should the a irbag deploy.
- Always make sure that the knee airbag can
inflate without interference. Objects
be-
Airb ag sys tem
tween you and the airbag can increase the
risk of injury in an accident by interfering
wit h the way the airbag deploys or by being
pushed into yo u as the a irbag deploys.
- Never let anybo dy, especi ally children or
anima ls r ide in the footwell i n front of the
passenger seat. If the airbag deploys, this
can result in serious o r fatal in juries.
- Never carry objects of any kind in the foo t­
well area in front of the driver's or pas­
senger's seat . Bulky objects (shopp ing
bags, for example) can interfere with or
prevent proper dep loyment of the airbag.
Small objects can be thrown th rough t he
vehicle if the airbag deploys and injure you
o r your passengers.
- Make sure the re a re no cracks, deep scratch­
es o r othe r damage in the area of the inst ru­
ment panel where the knee airbags a re lo­
ca ted.
- If ch ildren are incorrectly seated, their risk
of injury inc reases in a coll is ion
~ page 29 5, Child safe ty.
Side airbags
Description of side airbags
The airbag system can provide supplemental
protection to properly restrained occupants.
Fi g. 2 44 Side a irbag locat ion in the drive r's sea t
The side airbags are located in the s ides of the
front seat
backrests ~ fig. 244 and the rear back­
res t* facing the doo rs.
The side airbags installed for the front seating
pos itions have been des igned and certified to
help reduce the risk of in ju ry that can be caused
by a irbags when they inflate, pa rticul arly when
.,.
289

Airbag system
the occupant sitting next to it is not seated prop­
erly. The side airbag for the front passenger seat
can be used with properly installed child re­
straints. Please be sure to read the important in­
formation and warnings whenever using a child
restraint in a vehicle: Safety belts
Qpage 263,
Airbag system Qpage 271, Ch ild safety
c::;, page 295.
The side airbag system basically consists of:
-the e lectronic control modu le and externa l side
impact sensors
- the two side airbags located in the sides of the
front backrests
- two rear side airbags*
- the airbag warning light in the inst rument clus -
ter.
The airbag system is monitored electronically to make certa in that it is functioning properly at all
times. Each time you turn on the ign it ion, the air­
bag system indicator light will come on for a few
seconds (self diagnostics).
The side airbag system supplements the safety
be lts and can help to reduce the risk of injury to
the driver's, front and rear* passenger 's upper
torso on the side of the vehicle that is struck in a
side co llision. The a irbag dep loys only in side im­
pacts and on ly when the vehicle acceleration reg­
istered by the control unit is high enough . If this
rate is below the reference value programmed in­
to the control un it, the side airbags will not be
tr iggered, even though the car may be badly
damaged as a result of the collision.
It is not pos­
sib le to define an a irbag tr igger ing range that
will cover every possible angle of impact, since
the circumstances will vary considerably between
one collision and another . Important factors in­
clude, for example, the nature (hard or soft) of
the impacting object, the angle of impact, vehicle
speed, etc.
Q page 291, Important safety in­
structions on the side airbag system.
Aside from their normal safety function, safety be lts work to help keep the driver or front pas­
senger in pos it ion in the event of a s ide collision
so that the side a irbags can provide protection.
The airbag system is
not a subst itute for your
safety belt. Rather, it is part of the overall occu-
290
pant res traint system in your vehicle . Always re­
member that the side airbag system can only
help to protect you if you are wear ing your safety
belt and wearing it properly. This is another rea­
son why you should a lways wear your safety
belts, not just because the law requires you to do
soc::;, page 263, General information .
It is important to remember that while the sup­
plemental side airbag system is designed to re­
duce the likelihood of ser ious injuries, other inju­
ries, for example, swelling, bru is ing, friction
burns and minor abrasions can also be assoc iated
with deployed side airbags. Remember too, side
a irbags w ill dep loy only once and only in certa in
kinds of accidents
-your safety belts are always
there to
offer protection.
Vehicle damage, repair costs or even the lack of
vehicle damage are not necessarily an ind icat ion
of over-sens itive or fa iled airbag activation. In
some collisions, both front and side airbags may
inflate. Remember too, that airbags wi ll deploy
on ly once and only in certain kinds of collisions
-
your safety be lts are always there to offer protec­
tion in those accidents in which airbags are not
supposed to deploy or when they have already
deployed .
The side airbag system will not deploy:
- when the ignition is turned off
- in side co llisions when the acceleration meas -
ured by the sensor is too low
- in front-end collisions
- in rea r-end collisions
- in rollovers.
In some types of accidents the front airbags, side
curta in airbags and side a irbags may be triggered
together .
&_ WARNING
-Safety belts and the airbag system will only
provide protection when occupants are in
the proper seating position
Q page 291.
- If the airbag indicato r light Q page 32
comes when the vehicle is being used, have
the system inspected immediately by your
authorized Audi dealer. It is possible 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. 245 Infla ted side airbags on left side of veh icle, rear
side airbag opt ional equipment
When the system is triggered, the airbag is filled
with propellant gas and breaks through a seam in
the seat surface area.
It expands between the
side trim panel and the passenger. In order to
help provide this additional protection, the side
airbag must inflate within a fraction of a second
at very high speed and with great force . The sup­
plemental side airbag could injure you if your
seating position is not proper or upright or if
items are locat ed in the area where the supple­
mental side airbag expands. This applies espe­
cially to
children¢ page 295, Child safety. Sup­
plemental side airbags inf late between the occu­
pant and the door panel on the side of the vehicle
that is struck in certain side
collision ¢ fig. 245.
Although they are not a soft pillow, they can
"cushion" the impact and in this way they can
help to reduce the risk of injury to the upper part
of the body.
A fine dust may develop when the airbag deploys.
This is normal and does not mean there is a fire
in the vehicle .
Airbag system
Important safety instructions on the side
airbag system
Airbags are only supplemental restraints. Always
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 airbags do their job to provide supplemental
protection.
A WARNING
An inflating side airbag can cause serious or
fatal injury. Improperly wearing safety belts
and improper seating positions increase the
risk of serious personal injury and death
whenever a vehicle is being used.
- In order to reduce the risk of injury when
the supplemental side airbag inflates:
- Always sit in an upright position and never
lean against the area where the supple­
mental side airbag is located.
- Never let a child or anyone else rest their
head against the side trim panel in the
area where the supplemental side airbag inflates.
- Always make sure that safety belts are
worn 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 without interference.
- Never install seat covers or replacement
upholstery over the front seatbacks that
have not been specifically approved by
Audi.
- Never use additional seat cushions that
cover the areas where the side airbags de­ ploy.
- Damage to the original seat covers or to
the seam in the area of the side airbag
module must always be repaired immedi­
ately by an authorized Audi dealer.
-
- Objects between you and the airbag can in­
crease the risk of injury in an accident by in­
terfering with the way the airbag unfolds or
_,.
291

Airbag syste m
by being pushed into you as the airbag in­
flates.
- Never p lace or attach accessories or other
objects (such as cupho lders, te lephone
brackets, or even large, bulky objects) on
the doors, over or near the area marked
"AIRBAG" on the seat backrests.
- Such objects and accessories can become
dangerous projectiles and cause in ju ry
when the supplemental side airbag de­ ploys.
- Never carry any objects or pets in the de­ ployment space between them and the
airbags or allow children or other passen­
gers to travel in this posit ion.
- Always use the built-in coat hooks* only for
lightweight clothing. Never leave any heavy
or sharp-edged objects in the pockets that
may interfere w it h side airbag deployment
and can cause personal i njury in an accident.
- Always prevent the side airbags from being
damaged by heavy objects knocking against
or hitting the sides of the seatbacks.
- The airbag system can only be triggered
once. If the airbag has been triggered, the
system must be replaced by an author ized
Audi dealership.
- Damage (cracks, deep scratches etc.) to the
orig inal seat covers or to the seam in the
area of the side a irbag mod ule m ust always
be repa ired immed iate ly by an authorized
Audi dealer .
-If children are sea ted improperly, their r is k
of injury increases in the ca se of an ac ciden t
¢ page 295, Child safety .
-Never attempt to modify any components of
the a irbag sys tem in any way.
- In a side collision, side a irbags w il l not fu nc­
t ion properly if sensors cannot correct ly
measure increasi ng air pressure ins ide the
doo rs when air escapes through larger, un­
closed openings in the door panel.
- Never drive w ith inter io r door tr im panels
removed .
- Never drive when parts have been re­
moved from the inside doo r panel and the
open ings they leave have not been proper­
ly closed.
292
- 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 equipment is installed i n the inside
door panels.
- Always have work on the doors done by an
authorized Aud i dealer or q ualified work­
shop.
Side curtain airbags
Description of side curtain airbags
The side curtain airbags can provide supplemen­
tal protection to properly restrained oc cupants.
Fig. 2 46 Sid e curta in airbags, driver 's side : locatio n
The side curtain airbags are located on both sides
of the interior above the front and rear side win­
dows
¢ fig. 246.
The side curtain airbags contain features that
provide ejection mitigation to help prevent vehi­
cle occupants or parts of their bodies from be ing
completely or part ially ejected from the vehicle
i nterior i n certa in side impacts and vehicle roll­
ove rs .
The side curtain airbag system supplements the
safety belts and can help to reduce the risk of in­
jury for occupants' heads and upper torso in a
side collision . The s ide curtain a irbag inflates in
s ide impacts and on ly when the veh icle ac celera­
tion registered by the control unit is high
eno ugh . If this ra te is be low the refere nce va lue
programmed into the contro l unit, the side cur ­
tain 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
an­
g le of impact, s ince the circumstances will vary
considerably between one collision and another.
Important factors include, for example, the
na­
ture (hard or soft) of the impacting object, the
angle of impact, vehicle speed, etc.
¢ page 293,
How side curtain airbags work .
Aside from their normal safety function, safety
be lts work to he lp keep the driver or front pas­
senger in pos it ion in the event of a collision so
that the side curtain airbags can p rovide protec­
tion .
The airbag system is not a substitute for your
safety belt . Rather, it is part of the overall occu­
pant restraint system in your veh icle . Always
re­
member that the airbag system can only help to
p rotect you if you are wearing your safety bel t
and wearing it properly . This is another reason
why you should always wear your safety belts, not just because the law requires you to do so
¢ page 263, General information.
It is important to remember that whi le the s ide
curtain airbag system is designed to he lp reduce
the likelihood of serious injuries, other injuries,
for example, swelling, bruising, friction burns and minor abrasions can also be associated with
these airbags upon deployment . Remember too,
these airbags will deploy only o nce and only in
certa in ki nds of acc idents -your safety belts are
always there to offer protection .
The side curtain airba g sy stem ba sically
consists of:
- The electronic control module and external s ide
impact senso rs
- The side curtain airbags above the w indows of
the outer seating positions with ejection miti­
gation feat ures
- The airbag indicator light in the instrument
panel
The airbag system is monitored electronically to make certain it is funct ion ing properly at all
times . Each time you turn on the ignit ion, the air­
bag system ind icator light will come on for a few
seconds (self d iagnost ics) .
Airb ag sys tem
The side curta in airbag is not activ ated:
- if the ignition is turned off
- in side co llisions whe n the acceleration meas-
ured by the sensor is too low
- in rear-end col lisions .
_&. WARNING
-Safe ty bel ts and the airbag system will only
provide pro tect ion when occupants are in
the proper seating position
¢ page 65,
Front seats.
- I f the airbag ind ic a tor light q page 3 2
comes when the veh icle is being used, have
the system inspected immediately by your
authorized Audi dealer. It is possib le that
the airbag will inflate when it is not sup­
posed to, or w ill not inf late when it should.
How side curtain airbags work
Side curtain airbags con work together with side
airbags to help reduce the risk of head and upper torso injuries for occupants who are properly re­
strained .
Fig. 24 7 Illustration of pr incip le: Inflated s ide curta in air­
bags o n the left s ide
The side curtain airbags inflate between the oc­
cupant and the w indows in a side collis ion
c> fig . 247 .
When the system is triggered, the side curtain
airbag is filled with propellant gas and breaks
through a seam above the front and rear side
windows identified by the AIRBAG label. In order
to help provide this additional protect ion, the
s ide curtain a irbag must inf late w ithi n the blink
of a n eye at very high speed and with g reat fo rce .
T he side c urtain airbag could injure you if yo ur
Ill>
293

Airbag syste m
seating position is not proper or upright or if
items are located in the area where the supp le­
mental side curtain airbag inflates. This applies
especially to
children ¢ page 295.
Although they are not a soft pillow, side curtain
airbags can "cushion" the impact and in this way
they can help to reduce the risk of in jury to the
head and the upper part of the body.
A fine dust may develop when the airbag deploys.
This is quite normal and does not mean there is a
f ire in the veh icle .
Important safety instructions on the side
curtain airbag system
Airbags are only supplemental restraints. Always
properly wear safety belts and ride in a proper
seating position.
There is a lot that yo u and your passengers must
know and do to help the safety be lts and airbags
do their job to provide supplemental protect ion.
A WARNING
Improperly wearing safety belts and improper
seating posit ions increase the risk of serious
personal inju ry and death whenever a vehicle
is being used.
- Never let occupants p lace any parts of the ir
bodies in the area from which the side cur­
ta in a irbag inflate.
- Always make sure that the side curtain air­
bags can inflate witho ut interferen ce.
- Use the built- in coat hooks on ly for light­
weight cloth ing. Neve r leave any heavy or
sharp-edged obje cts in t he pockets that may
in terfere w ith airbag deployment and can
ca use personal injury in a collision.
- Never use hangers to hang clothes on the
hoo ks.
- Only use factory-installed s un shades or, if
shades installed after the veh icle leaves the
factory, use only genuine Aud i sun shades.
- Never swing the sun viso rs ove r to the side
windows if things such as pens, ga rage door
openers, hands-free speakers, etc . are at­
tached to the sun visors. They co uld come
294
loose and cause serious injury if the side cu r­
tain airbag inflates.
- A deploying airbag inflates in a fraction of a
second and with great force.
- Never attach objects to the cover or in the
deployment zone of a side curtain airbag .
- The a irbag deployment zones must be kept
clear at all times. Make s ure there are no
objects, pets, o r other persons in the space
between any vehicle occupant and any air­
bag at any time.
- Do not attach any accessories to the doors.
A WARNING
- The a irbag system can deploy on ly once. If
the airbag has been triggered, the system
m ust be rep laced by an authorized A udi
dealer or qualified workshop .
- Always have work invo lv ing the side curtain
airbag system, remova l and installat ion of
the airbag components, or other repairs
pe rformed by a q ualified dealership. Other­
w ise the airbag system may not work cor­
rectly.
- Never attempt to mod ify any componen ts of
the airbag system in any way.

a co .... N ,....
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3 co
Child safety
Important information
Introduction
The rear seat is generally the safest place in a
collision .
The physical principles of what happens when
your vehicle is in a crash apply also to children
c:> page 264, What happens to occupants not
wearing safety belts? .
But unlike adults and
teenagers, their muscles and bones are not fully
developed. In many respects children are at
greater r isk of serious injury in crashes than
adults .
Because children's bodies are not fu lly devel­
oped, they require restraint systems especially
designed for their size, weight, and body struc­
ture. Many countries and all states of the United
States and provinces of Canada have laws requir­
ing the use of approved child restraint systems
for infants and small children .
I n a frontal crash at a speed of 20 -35 mph (30 -
56 km/h) the forces acting on a 13-pound (6 kg)
infant will be more than 20 times the weight of
the child . This means the weight of the chi ld
would suddenly be more than 260 pounds (120 kg) . Under these conditions, only an appro­
priate child restraint properly used can reduce
the r isk of serious injury . Child restra ints, like
adult safety belts, must be used properly to be
effect ive. Used improperly, they can inc rease the
risk of serious injury in an accident.
All ch ildren, especially those 12 years and young­
er must always ride in the back seat proper ly re­
stra ined for their age and size. If you must install
a child restraint on the front passenger seat in
exceptional circumstances, be sure to read and
heed the important information and warnings
c:> page 2 72. Infants and other children who are
properly restrained in an appropriate child re­
straint that is for their size and age can benefit
from the protection that supplemental side air­
bags provide in some kinds of crashes.
For more information please see information
provided by the:
Child safety
- National Highway Traffic Safety Administration
(NHTSA), currently at: http:/ /www.safe ­
rcar.gov (for the USA)
- Transport Canada Information Centre, current-
ly at: http://www.tc .gc.ca (for Canada)
Consult the child safety seat manufacturer's in­
structions in order to be sure the seat is right for
yo ur child's size
c:> page 299, Important safety
instructions for using child safety seats .
Please
be sure to read and heed all of the important in­
formation and WARNINGS about child safety,
Advanced Airbags, and the installation of child
restra ints in this chapter .
There is a lot you need to know about the Ad­
vanced Airbags in your vehicle and how they work
when infants and children in child restraints are on the front passenger seat . Because of the large
amount of important informat ion, we cannot re­
peat it all he re. We urge you to read the detailed
information in this owner 's manual about airbags
and the Advanced Airbag Sys tem in yo ur vehicle
and the very important information about trans­
porting children on the front passenger seat.
P lease be sure to heed the WARNINGS -they are
extremely important for your safety and the safe­
ty of your passengers, especially infants and
small children.
A WARNING
-- Accident statistics have shown that children
are generally safer in the rear seat area than
in the front seat ing pos ition. Always restrain
any child age 12 and under in the rear.
- All vehicle occupants and especially children
must be restrained properly whenever riding
in a vehicle. An unrestrained or imp roperly
rest rained child could be injured by striking
the interior or by being ejected from the ve­ hicle during a sudden maneuver or impact.
An unrestrained or improperly restrained
child is also at greater r isk of injury or death
through contact w ith an inflating a irbag.
-A suitable ch ild restraint properly installed
and used at one of the rear seating positions
provides the h ighest degree of protect ion
for infants and small children in most acci­
dent situat ions.
295