2015 AUDI S3 SEDAN battery

Intelligent Technology
is not different from a two wheel drive vehi­
cle. Do not be tempted to accelerate to a
high speed when the road is slippery th is in­
creases the r isk of an accident.
- Note that on wet streets, the front wheels
can "hydrop lane" if driving at speeds that
are too high . Unlike front whee l drive
vehicles, the engi ne does not rev higher sud­
denly when the vehicl e begins hyd rop laning.
Fo r th is r easo n, pay a ttent ion to the road
co ndi tions regardless of your speed.
Energy management
The starting ability is optimized
The en ergy management system manages the
electrical energy distribution and optimizes the
availability of electrical energy for starting the
engine.
When a ve hicle with a co nventional energy sys­
tem is not driven for a long time, the battery is
drained by equipment (for example the immobil­
izer) . In certa in circumstances , there cou ld may
not be eno ugh energy to start the engine .
Your vehicle is equipped w it h an intelligent ener­
gy management system for distr ibut ing electric i­
ty . T his sign ificantly improves the starting ability
and inc reases the battery life .
The energy management system Is made up of
battery diagnos is , idling cu rrent management
and dynamic energy management.
Battery diagnosis
The batte ry diagnosis determines the batte ry
charge leve l. The sensors determine the batte ry
voltage, the battery current , and the battery
t emperature . The current cha rge level and the
pe rformance of t he battery a re dete rmined based
on this .
Idling current management
The idling cu rrent management decreases the
energy used while parked. W it h the engine
sw itched off, it manages the energy d istribution
to the different electrical components . Date from
battery diagnosis is taken into account for this .
128
Depend ing on the ba tte ry charge leve l, electrical
equipment is switched off one item after the oth­
er, to prevent the battery from dra ining and to
retain the start ing ability.
Dynamic energy management
While driv ing, dynam ic ene rgy management dis­
tribu tes the appropriate amount o f energy to the
e lectrica l equ ipment. It control s the battery
charge level so that more ene rgy is not used then
i s be ing generated in order to maintain an opti­
mal battery charge level.
(D Tips
'
- Energy management cannot overcome the
laws of p hys ics. Note that the charge level
and length of the battery life a re limited.
- When the sta rting ability is endangered, the
(•) indicator light t urns on
c:> page 19 .
What you should know
Maintaining the starting ability is the highest
priority.
A lot of st ress is placed on the battery when dr iv ­
ing sho rt distances, in traffic, and at cold t imes
of the year. A lot of energy is used but little is
generated.
It is also critical when the engine is
not ru nning but e lectr ica l equipment is sw itched
o n. In th is case, energy is used but none is gener ­
ated.
In sit uat ions like this, e nergy ma nagement w ill
active ly regu lated the distribution of energy .
Long periods without use
If you do not drive your vehicle for several days or
weeks, e lectr ica l cons umers are grad ually scaled
back or sw itched off. This reduces energy use and
ensures the ve hicle w ill be able to start after long
per iods of time . Some conven ience functions
suc h as opening w it h the remote co ntrol key may
not be available. These conve nience f unct ions
will be ava ila ble aga in once you swi tch the igni-
tion on and st art the eng ine . .,_

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With the engine switched off
The battery will dra in if you use functions s uch as
listening to the radio while the engine is switched
off.
The vehicle 's ability to start may be impaired by
the energy use, a message w ill appear in the In­
fotainment system disp lay.
The message ind icates that the system will
switch off automatically soon.
If you would like
to continue using the functions, you must start
the eng ine.
With the engine running
Although electrical energy is generated wh ile
driving, the batte ry can drain. This can happen
when little energy is gene rated, and much is used
and the charge level of the battery is not optima l.
To restore the balance of energy, components
that require large amounts of energy are tempo­
r ar ily sca led back or switched off. Heating sys­
tems in particular require a great deal of energy.
If you notice, for example, that the seat heating*
or rear window defroster is not working, then it
has been temporari ly reduced or switched off .
These systems are avai lab le aga in as soon as the
energy balance has been restored.
In addition, you may notice that the idle speed
has slightly increased . That is normal and no
cause for concern. Due to the increased idling
speed, the add itional required energy w ill be gen­
erated and the battery will be charged .
Intelligent Technology
129

Airb ag syst em
entered in your Audi Warranty & Mainte­
nance booklet under
AIRBAG REPLACEMENT
RECORD.
- For safety reasons in severe accidents, the
alternator and starter are separated from
the vehicle battery with a pyrotechnic circuit interrupter .
- Work on the pyrotechnic circ uit inter rupt­
er must only be performed by a qualified
technicians w ho have the experience, in­
formation and special tools necessary to perform the work safely.
- If the veh icle or the circuit interrupter is
scrapped, a ll applicable safety precautions
must be followed.
@ For the sake of the environment
Undep loyed airbag modu les and pretension ­
ers might be classified as Perchlorate Materia l
- specia l hand ling may apply, see
www.dtsc.ca.gov/hazardouswaste/perchlo­ rate. W hen the veh icle or parts of the re­
straint system including a irbag modules and
safety belts with prete nsioners are scrapped ,
all applicable laws and regulat ions must be
observed. Your authorized A udi dealer is fa­
m iliar with the se requirements a nd we recom­
mend that you have your dealer perform this
service for yo u.
Other things that can affect Advanced
Airbag performance
Changing the vehicle's suspension system ca n
change the way that the Advanced A irbag System
performs in a crash. For example, using t ire- rim
combinat ions not approved by Audi, lower ing the
ve hicl e, chang ing the stiffness of the suspension,
includ ing the spr ings, suspension s truts, shoc k
absorbers etc. can change the forces that are
measured by the a irbag sensors and sent to the
e lectronic control unit. Some suspension changes
can, for example, increase the force levels meas ­
ured by the sensors and make the a irbag system
deploy in c rashes in which it wou ld not deploy if
the changes had not been made. Other ki nds of
changes may reduce the force levels measured by
164
the sensors and p revent the airbag from dep loy ­
ing when it shou ld .
A WARNING
Changing the vehicle's suspension including
use of unapproved tire-rim combinations can
change Advanced Airbag performance and in­
crease the risk of serious personal injury in a
crash.
- Never install suspension components that
do not have the same performance charac­
ter istics as the components origina lly instal­
led on you r vehicle.
- Never use tire-rim combinations that have
not been approved by Audi.
Knee airbags
Description of knee airbag s
Applies to vehicles: with knee airbags
The knee airbag system can provide supplemen­
tal protection to properly restrained front seat
occupants .
Fig. 132 Driver 's knee a irbag
The driver knee airbag is i n the instrument panel
u nderneath the steer ing wheel ~
fig. 132 , the
airbag fo r the passenger is at abou t the same
height in the i nstr ument panel underneath the
glove comp artment.
The knee airbag offers additional protection to
the d river's and passenge r's kn ees and uppe r and
lower thigh areas and supplements the protec­
tion provided by the safety belts.
If the front a irbags deploy, the knee a irbags also
deploy in fronta l co llisions when the dep loyment
th reshold stored in the con trol un it is met
II>-

Checking and F ill in g
damp cloth and plenty of cold water. If the
AdB lue has already crysta llized, use warm
water and a sponge. AdBl ue res idue that is
not removed will crysta lli ze and can damage
the affected s urface.
- Do not store the ref ill bottle in the vehicle.
If it leaks, the escaping Ad Blue cou ld dam­
age the veh icle inter ior.
- Do not allow Ad Blue to come into contact
with clothing. If there is contact with the
flu id, flush immed iate ly w ith plenty of wa­
ter .
@ Tips
-You can obtain refill bott les from an author­
i zed Audi dealer or authorized Audi Service
Facility .
- Follow the Ad Blue manufacturer 's instruc­
tions for use and storage .
Engine compartment
Working in the engine compartment
Special care is required if you are working in the
engine compartment
For work in the engine compartment such as
c h ecking and filling fluid s, there i s a risk of in ­
jury, scalding , accid ents, and burns. F or thi s
rea son, follow all the following li sted warning s
and general safety precautions. The engine
c ompartment is a dangerous area!
~ &
A WARNING
To reduce the risk of injur ies, complete the
following steps before opening the hood :
- Turn the eng ine off.
- switch the ignit ion off .
- Set the parking b rake.
- Pla ce the sele ctor leve r in the P pos ition.
- Let the engine coo l down .
- Never open the hood when you see that
steam o r coolan t drips from the engine
compartment- there is a da nger of burns!
Wait un til no steam o r coolant flows ou t.
- Keep children away from the engine com­
partm ent.
198
-
- Never sp ill fluids on a hot engine . These fl u­
ids (such as the freeze protection conta ined
in the coolant) can catch fire.
- Avoid short circ uits in the e lectrica l system,
especially the battery.
- When working in the engine compa rtment,
remember that the radiator fan can switch
on even if the ignition is switched off, wh ich
increases the risk of pe rsonal injury.
- Never open the cap on the coolant expan­
si on tank when the engine is warm . The
cooli ng system is under p ress ure .
- To protect yo ur face, hands, and a rms from
hot steam or coolant, cover the cap with a large cloth when o pening.
- Do not remove the engine c over under any
circumstances . T his i ncreases the r isk of
burns.
- If tests need to be per formed with t he en­
gine running, there is additional danger due
to mov ing components (such as the rib bed
be lt , a lternator a nd radiator fan) a nd from
the high v olt age ignit io n sy stem.
-Never reac h into the radiato r fan . The e lec­
tric aux iliar y fan i s controlled by tempera­
ture and can swi tch on sudden ly.
- Pay attention to t he fo llow ing warnings list­
ed when w ork on the fue l system o r on the
elec tric al equipmen t is requ ired .
- Always d isconnect the vehicle battery
from the vehicle electrical system
- Do not smo ke
- Never work near open flames
- Always have a work ing fire exting uis her
near by
- To reduce t he risk of e le ct ric shock and in­
jury, never touch the following components
when t he engine is running or is bein g start­
e d :
- Ign ition cable
- Other components in the electronic h igh
vo ltage ignition system
- If you must check or perform work o n the
e ngine whi le it is running:
- S et t he parki ng bra ke and pla ce the selec­
t or lever in the P (park) posi tion first .

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-Always proceed with extreme caution so
that clothing, jewelry or long hair do not
become caught in the radia tor fan, fan
belt or other moving components or do not come into contact with hot compo­
nents . T ie back long hair before beg inning
work and do no t wear cloth ing that can
hang down into the eng ine.
- limit your exposure to exhaust and chemi­
cals to as short a time as possible
q ,& .
..&, WARNING
California Propos ition 65 Warning:
- Engine exhaust, some of its constituents,
and certai n veh icle components conta in or
em it chemicals known to the State of Cali­
forn ia to cause cancer and birth defec ts and
reproductive harm. In addition, certai n flu ­
ids contained in vehicles and certain prod­
ucts of component wear contain or emit
chemicals known to the State of California
t o cause cancer and birth defects or other
reproductive harm .
- Battery posts , terminals and related acces­
sories contain lead and lead compounds,
chem icals known to the State of California
to cause cancer and reproductive harms .
Wash hands after hand ling.
(D Note
When filli ng flu ids, be sure not to m ix the flu­
ids up . Otherwise seve re malfunctions and en ­
gine damage w ill occur .
@ For the sake of the environment
You should regu larly check the grou nd under
your veh icle in order to detect leaks quickly . If
there are visible spots from oil or other f luids,
b ring yo ur vehicle to an autho rized Aud i dea l­
er or authori zed Audi Se rv ice F acili ty to be
checked.
Ch eck in g and Fillin g
Opening the hood
The hood is released from the in terior .
Fig . 155 Se ctio n from t he dr iver' s footwe ll: re le a se le ve r
Fig . 156 Ro cke r swit c h un der t he hoo d
Make sure the wiper arms a re not raised up from
the windsh ie ld . Oth erwise the paint cou ld be
damaged.
.,. W ith the driver's door open, pull the lever be­
low the instr ument pane l in the d irect ion of the
arrow
<=> fig. 155.
.,. Raise the hood slightly r:!> ff::.. .
.,. Press the rocker switch unde r the hood upward
q fig. 156 . This re leases the catch .
.,. Open the hood .
..&, WARNING
-=
Never open the hood when you see that steam
or coolant drips from the engine compart­
ment- there is a da nger of bu rns! Wait unt il
n o steam or coolant flows out .
- Never open the hood when you see that
s team or coo lant dr ips from the e ngine
comp artment- the re is a dange r of burns !
Wait until no steam or coo lant flows o ut .
199

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Checking and Filling
Diesel engine compartment overview
The most important check points .
Fig. 158 Typical locat ion of the reservoi r, eng ine oil dipstick, and engine o il filler opening
CD Coolant expansion tank (-L) .....
@
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®
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(J)
®
Engine oil dipstick ... ...... ... .
Engine oil filler opening (~) .. .
Brake fluid reservoir
(0))
Battery(+) under a cover
Body ground point(-)
Washer fluid reservoir
(O) ..... .
Fuse housing .......... ...... .
206
203
203 207
209
212
248
The engine oil filler opening and the dipstick
(items ® and @)¢
fig . 158 may be located in a
d ifferent area depending on engine version.
A WARNING
-
Read and following the WARNINGS before
checking anything in the engine compartment
¢page 198.
Engine oil
Engine oil specifications
The engine oil used must conform to exact speci­
fications.
T he service interval display in the instrument
cluster of your vehicle will inform you when it is
time for an oi l change. We recommend that you
have your oil changed by an authorized Audi Serv­
ice Advisor.
If you have to top off the oil between o il changes,
use the Audi oil qua lity standard specified in the
table .
Audi oil quality standard
Gasoline
VW 502 00 or
engine vw 504 00
Diesel VW 507 00
engine
201

Checking and F ill in g
sure you are using the correct brake f luid .
The correct type of brake fluid is also indi­
cated on the brake fluid reservoir .
- The brake fluid must be new. Heavy use of
the brakes can cause a vapor lock if the
brake fluid is left in the system too long.
This can ser iously affect the effic iency of
the brakes as well as your safety . This
could res ult in an accident.
(D Note
Brake flu id will damage the paint of your vehi­
cle .
@ For the sake of the environment
Because of the problem of proper d isposa l of
brake fluid as well as the spec ia l tools re-
quired and the necessary expertise, we rec ­
ommend tha t you have the b rake fluid
changed by your author ized Audi dealer.
Battery
General information
The battery in yo ur Audi does not need any ma in­
tenance under normal operating conditions. Aud i
recommends having the electro lyte level check by
an author ized Audi dealer or author ized Audi
Service Fac ility when the re a re
high outside tem­
pe ratu res or when dr iv ing a ll day. The electroly te
leve l sho uld also be checked ea ch t ime the bat ­
t ery is charged
9 page 210 .
Have the battery checked when you br ing you r ve­
hicle in fo r an inspec tio n. It is a good idea to re­
p la ce the batte ry if i t is more than 5 ye ars old .
During certai n types of a irbag dep loyments, the
battery is disconnect ed from the vehicle electr i­
cal system fo r safety reasons
9 .&. in Repair, care
and disposal of the airbags on page 163.
Disconnecting the battery terminals
Some veh icle functions (such as power windows)
are not ava ilable when the batte ry is disco nnect­
ed. These functions must be programmed after
the ba ttery is reconnec ted. To avoid havi ng to do
t his , on ly disconnect the b attery from the veh icle
208
electrica l sys tem when that is necessa ry to pe r­
form repairs.
To reprogram the func tion s, proceed as fo llows:
Function Reprogramming
P owe r window one-
9 page 41, Correcting
to uch up/down f unc-power window malfunc-
tion tions
Remote control key o r If the vehicle does not
Conve nience key reac t to the key , it must
be synchronized
9 page 35
Digita l clock 9 page 10
ESC indi cato r light The ind icator lig ht goes
o ut afte r driving a few
meters
Not running the vehicle for long periods of
time
If you do not d rive yo ur vehicle for several days or
weeks, e lectr ica l components are gradua lly re­
duced or switched off. Th is red uces energy con­
s u mption and maintains the vehicle's ability to
start over a long per iod of t ime ¢
page 128.
Some conven ience functions , such as inter ior
li ght ing or power seats* may not wo rk . These
convenienc e functions w ill be availabl e agai n
o nce you swi tch the ig nition on and sta rt the en ­
gine.
Winter operation Du ring the winter months , it is common for the
batte ry capaci ty to dec rease as the tempe rat ur es
become lower . This is because more powe r is
needed to start the vehicle and componen ts such
as the he ad lights and the rear window defogger
are used more frequent ly.
Avoid using powe r unnecessar ily, especially in
c ity dr iv ing o r o n short trips . H ave yo ur au thor­
iz ed Audi de aler or author ized A udi Se rv ice Facili­
ty check the ba ttery capacity before the start of
winter ¢
page 210. A well-charged battery will
not only reduce starting problems in co ld weath­
er, but it will a lso last longer .

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A WARNING ,~
- Work on the battery requires expert knowl­
edge. Contact an authorized Aud i dealer or
authorized Audi Service Fac ility for informa­
t ion regarding the v ehicl e batte ry. There is a
risk for chemical burns or e xplosions.
- Never open the vehicle battery . Do no t try to
change the batte ry elect ro lyte level. Other­
wise ex plosive gas will e scape from the bat­
tery and increase the r is k of an explosion.
@ Tips
If your vehicle is not driven for severa l wee ks
in very cold tempe ratu res, remove the battery
and store it in a pla ce where i t will no t freeze.
This preven ts the bat tery from being d am­
aged and needing to be replaced .
Working on the battery
Be especially careful when working on or near
the battery.
The bat te ry is loc ated in t he luggage compart­
men t under the floor. Before yo u check any thing
i n the l uggage comp artme nt,
read and heed all
WARNINGS
q ,&. .
Always heed the sa fety warning s, when working
on the vehicle battery o r th e veh icle elec trical
sys tem to preven t inju ry.
The following WARNINGS are very important
when work ing on the battery:
Always he ed the following WARNING SYM-
BOLS and safety pre caution s wh en working on
the battery .
®
Always wear eye protect ion.
A
Battery acid contains sulfuric acid. Al ·
ways wear gloves and eye protection.
@
No
• sparks
- flame s
- smok ing.
Checking and Fillin g
&
When a battery is charged, it produce s
-hydrog en gas which i s explo siv e a nd
c ould cau se p ers onal injury.
®
Always keep the battery well out of
reach of children .
A WARNING ..,__ -
Whenever working on the battery or on the
electr ica l system, the re is the risk of in jury,
accident and even fi re. Read and heed the fol­
l ow ing WARNI NGS:
- Always wear eye protection. Do not let bat­
tery ac id or a ny lead particles get on your
skin o r clothing. Shield yo ur eyes. Exp losive
gases can ca use blindness or o ther in jury.
- Battery acid conta ins sulfuric acid. Sulfuric
acid can ca use b lindness and severe burns.
- Always wear g loves and eye protection. Do
not tilt the battery because ac id could leak
out of the ventilation openings.
- If you get battery ac id in your eyes or on
your s kin, immed iate ly r inse with cold wa­
ter fo r several minutes and get medical at­
tent ion.
- If you shou ld ingest any battery acid , seek
med ica l attent io n immed iate ly.
- Do not expose the batte ry to an open flame,
electric sparks or an open light.
- Do not smoke.
- Do not interchange the positive and nega-
tive cables .
- When working on the battery , be s ure not to
short-c ircuit the terminals with tools or oth­
er metal objects . This would ca use the bat­
tery to heat up very quickly , which could
lead to damage or exp losion and perso nal
in jur y.
- When a battery is charged, it produces hy­
drogen gas which is e xplos ive and could
cause persona l injury .
- Always keep the battery well out of the
reach of children.
- Before work is done on the electrical sys­
tem, disconnect the negat ive g round cab le.
- Before performing any work on t he e lectr i­
cal system, sw itch
off the engine and igni-
tion as well as any electrical equ ipme nt. The .,..
209