battery AUDI A3 SEDAN 2018 Service Manual

Audi conn ect e-tron ser vic es
Vehicle status report
Applies to: vehicles with Audi connect e-tron services
You can access various vehicle statuses using the
services, such as:
- high-voltage battery charge level ,
- electric range,
- mileage,
- next inspection.
F or additional information, s ee
¢ page 95, Power
meter overview
and ¢ page 97, Range display.
A WARNING
Do not ignore messages and warning or indi­
cator lights that turn on in the vehicle be­
cause of the information in the status report.
Th is could lead to break downs in on the road,
accidents and se rious injuries.
Car Finder
Applies to: vehicles with Audi connect e-tron services
The vehicle collects data under certain conditions
and sends it to a server .
When data is stored, you can access values such
as these us ing the service:
- Vehicle location disp lay,
- Display of one's own location,
- Ro ute to your veh icle.
If your mobile device also has a nav igation func­
tion, you can navigate to your last know n parking
locat ion.
@ Tips
- The new parking location cannot be deter­
mined with this service if the vehicle is
moved after shutt ing the veh icle
off and
wi thout sw itching the ign ition on and
off
again, for example when be ing towed o r if
the vehicle is stolen .
- If the vehicle is moved an d shut
off again
us ing the second key, for example, the new
parking location is t ransmitted to the server
after switching the ignition off .
200
Charging
Applies to: vehicles with Audi connect e-tron services
You can control and access the hig h-voltage bat ­
tery c harging proc ess r emotely using these serv ­
i ces. You have the following options:
- check the battery charge leve l,
- star t/end t he cha rging process,
- prog ram the charging t imer with/w itho ut cl i-
mate cont rol,
- deactivate/activate the cha rg in g timer .
Fo r addi tional information,
see ¢ page 106,
Charging the battery with the Audi e-tron charg­
ing system .
A WARNING
Only perform charging f unctions on the high­
voltage battery if the vehicle is shut
off co r­
rect ly, is connected to a suitable socket and if
the ign ition is swi tched off.
Temperature control
Applies to: vehicles with Audi connect e-tron services
You can contro l the climate control in your vehi­
cle remotely using these services:
- start/end climate control ,
- program the timer,
- deactivate/activate the timer.
For addi tional informa tion, see
¢ page 116, Cli ­
mate control .
A WARNING
Only perform the climate control functions if
your vehicle was shut
off correct ly and the ig­
n ition is switched off.

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the inside of the vehicle in a crash and cause
serious injur ies. Store these types of devices
securely whi le driving.
- Do not use any w ireless devices on the front
seats w ith in range of the a irbags while driv­
ing. Also read and follow the warnings in
¢ page 2 73 , Front airbags .
CD Note
-Always fo llow the information found in i::> @
in Wi-Fi hotspot on page 195 .
- Please note that there genera lly are addi­
tiona l costs when using an online media
se rvice account, especially when it is used
i nternationally .
(D Tips
-Depending on the Internet connection and
network traffic, a connection loss can occur
duri ng p layback of on line media serv ices .
-Online media and Internet radio usage de­
pends on the serv ice availab ility of the third
party provider .
- Audi AG simply makes the access to online
media services possible through the MMI
and does not take any respons ibility for the
contents of the online med ia services .
- Always read the chapter
¢ page 196, Audi
connect (Infotainment) general informa­
tion .
- Dependi ng on the mobile device used, the re
may be interruptions during media playback
and whe n using the
Audi MMI connect app.
To avoid i nterruptions when usi ng a mob ile
device , do no t lock the s cree n on you r mo­
bile device and keep the
Audi MMI connect
app in the foreground .
- Cont act an a uthorized Audi dea ler or au­
thorized Audi Service Facili ty for additional
i nformat ion about online media .
Media
Multimedia connections
USB adapter for Audi music interface
You can connect your mobile devices (such as a
smartphone or MP3 player) to the Audi music in ­
terface and charge them using a special USB
adapter .
Fig. 206 Audi Genuine Acces sorie s: USB a dap ter
You can purchase the USB adapter ¢ fig. 206
from an author ized Audi deale r or at spec ialty
stores:
© USB adapter for devices with a micro USB con ­
nect ion
@ USB adapte r for devices with an Apple Light­
ning conne ct ion
@ US B adapte r for devices wi th USB type C con­
ne ct io n
@ USB adapter for devices with an Apple Dock
connector
You can connect your mob ile dev ices through the
Audi music interface to the MMI us ing the USB
adapter and cha rge the battery at the same t ime .
App lies to : vehicles wit h Audi music interface
-Audi mu sic interfa ce : see c;> page 230 .
Applies to: vehicles wi th USB charging ports in the rear
-USB cha rging ports in the rear *: see
¢page 231 .
CD Note
Hand le the USB adapter carefully. Do not al­
low it to be pinched.
229

Media
Audi music interface
Connect your mobile devices to the Audi music
interface in order to operate them through the
MMI and charge the battery.
Fig. 207 Storage co mpa rtm ent u nder the cente r armrest
and at the front of t he ce nter con so le: A udi music interface
USB Input
- Connecting a mobile device using a USB
adapter :
connect the applicable USB adapter @
¢
fig. 207 to the port on the Audi music inter­
face®¢ fig. 207 and then connect the adapt­
er to the mobile device @(such as an iPhone) .
-Charging a mobile device using a USB adapter :
when you connect a mobile device to the Audi
music
interface @¢ fig. 207 using the applica­
ble USB
adapter @¢ fig. 207, the battery will
automat ically charge.
- Disconnecting a mobile device from the Audi
music interface:
remove the USB adapter @
¢ fig. 207 from the Audi music interface .
-Disconnecting mobile devices with an Apple
Dock connector:
remove the Apple Dock con­
nector from the Apple device with the release
tabs pressed
in © ¢ page 229, fig. 206 .
The media are started and operated through the
mobile device or the MMI, depending on the de­
vice being used
¢ page 232 .
Connecting multiple mobile devices: if a mobile
device (such as a smartphone) is connected at the
respective USB port on the Audi music interface,
then all devices can be used as a playback source .
AUX Input
- Connecting a mobile device to the AUX input :
connect the cable ® ¢ fig. 207 to the AUX in­
put© on the Audi music interface and then to
230
the mobile device@ (such as an MP3 player or
sma rtphone).
-Disconnecting a mobile device from the AUX
input:
remove the cable ®¢ fig. 207 from the
AUX
input @¢fig. 207.
- Operation: select and confi rm the External au­
dio player
source ®¢ page 232, fig. 208. Me­
dia is started and operated through the mobile
dev ice @ ¢ fig. 207.
A WARNING
Driving requires your complete and undivided
attention . As the driver , you have comp lete
responsibility for safety in traffic . Never oper­
ate mobi le devices wh ile driving, because this
inc reases the risk of an acc ident.
(D Note
- Use a USB extens ion cable to connect devi ­
ces that have an integrated USB connector
(such as a USB stick) to prevent damage to
your USB device and the Audi music inter­
face.
- Extremely high or low temperatures that
can occur inside veh icles can damage mobile
devices and/or impair their performance.
Never leave mobile devices in the vehicle in
extremely high or low temperat ures.
(D Tips
- Always follow the information found in
¢page 62.
-When you switch the ignition off, the USB
ports are still suppli ed with power until the
energy management intervenes.
- Do not use an additional adapter or USB ex­
tension cable to connect mobile devices to
the Audi music interface that already have a
cable or that must be connected with a USB
adapter(¢ page 229). They may impair the
functionality.
- You can purchase the AUX connector cable
from an authorized Audi dealer or at spe­
cialty stores.
-Audi recommends setting the volume of a mobile device connected to the AUX input to
..,

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approximately 70% of the maximum vol­
ume.
- Functionality is not guaranteed for mobile
devices that do not conform to the USB
2.0
specification.
- USB hubs are not supported.
- Some versions of the iPod such as the iPod
shuffle cannot be connected to the USB
adapter for devices with Apple Dock connec­
tor. Connect these devices using a AUX con­
nector cable.
- Changed content on a mobile device
l) that
is connected to the Audi music interface
may not be displayed in the media center.
In this case, reset the
Media settings back
to
Factory settings c> page 244.
- Video playback through the Audi music in­
terface is only supported if the connected
device is recognized as a USB storage device
(for example a USB stick). Apple devices and
MTP devices (such as smartphones) are not
recognized as USB storage devices .
- iPod/iPhone malfunctions also affect the
operation of the MMI. Reset your iPod/
iPhone if this happens.
- For important information on operating
your iPod/iPhone, refer to the user guide for
the device. Audi recommends updating the
iPod/iPhone software to the latest version.
- For more information about the Audi music
interface and supported devices, check the
Audi database for mobile devices at
www.audiusa.com/mp3 or contact an au­
thorized Audi dealer or authorized Audi
Service Facility.
8 l ) A pp lies o nly to MTP device s. Does not apply to App le dev i­
"' &j ces and USB mass storage d ev ices.
Media
USB charging ports in the rear
App lies to : vehicles wit h USB charging ports in the rear
You can charge the battery on your mobile device
through a USB charging port.
Two USB charging ports* are located at the back
of the center console.
- USB adapter: refer to c> page 229, USB adopter
for Audi music interface.
- Charging a mobile device using the USB
adapter: connect your mobile device to a USB
charging port using a suitable USB adapter.
- Disconnecting a mobile device from the charg­
ing port:
remove the USB adapter from the USB
charging port .
-Disconnecting mobile devices with an Apple
Dock connector :
remove the Apple Dock con­
nector from the Apple device with the release
tabs pressed in.
A WARNING
-
Driving requires your complete and undivided
attention . As the driver, you have complete
responsibility for safety in traffic. Never oper­
ate your mobile devices while driving, because
this increases the risk of an accident.
((D) Note
Extremely high or low temperatures that can
occur inside vehicles can damage mobile devi­
ces and/or impair their performance . Never
leave mobile devices in the vehicle in ex­
tremely high or low temperatures.
(D Tips
- Always follow the information found in
c>page 62 .
-When you switch the ignition off, the USB
ports are still supplied with power until the
energy management intervenes.
- Do not use any additional USB extension ca­
bles or adapters to connect mobile devices
to the USB charging port that have already
liJo-
231

Audi smartphone interface
Opening a menu item
Select and confirm a menu item using the MMI
control panel.
Troubleshooting
Applies to: vehicles with Audi smartphone interface
Problem Solution
Audi smartphone
Check the charge level of your smartphone battery.
interface cannot be Check the USB cable and use a different one if necessary
.
opened. Check if Android Auto or Apple CarPlay is available in your country.
Android Auto : check if the Android Auto app is installed on you r smartphone .
Connecting the Check if you are using the correct USB adapter and if the USB adapter is connect-
smartphone to the ed correctly to your smartphone and the Aud i mus ic
interface ¢ page 229.
MMI failed . Apple CarPlay: check if App le CarPlay is activated on your sma rtphone .
Android Auto: check in the And raid Auto app if Android Auto permits new
veh icles .
T he smartphone is Check if you are using the correct USB adapter and
if the USB adapter is connect -
not automatically ed correctly to your smartphone and the Audi music
interface
¢ page 229.
detected. Check if the requirements needed to connect a smartphone have been met.
242

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action is entered in your Audi Warranty &
Maintenance booklet under
AIRBAG RE­
PLACEMENT RECORD.
- Applies to plug-in hybrid* vehicles: In the
event of a collision where the airbags de­
ploy, the electrical connection to the high
voltage battery is automatically disconnect­
ed. This prevents a short c ircuit.
@) For the sake of the environment
Undeployed airbag modules and pretension­
ers might be classified as Perchlorate Materi­
al - special handling may apply, see
www.dtsc.ca.gov/hazardouswaste/perchlo­
rate. When the vehicle or parts of the re­
straint system including airbag modules and
safety belts with pretensioners are scrapped,
all applicable laws and regulations must be
observed. Your authorized Audi dealer is fa­
miliar with these requirements and we recom­
mend 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 System
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 , suspension 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 meas­
ured 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 airbag from deploy­
ing when it should.
A WARNING
Changing the vehicle's suspension including
use of unapproved tire-rim combinations can
change Advanced Airbag performance and in-
.
Airbag system
crease the risk of serious personal injury in a
crash.
- Never install suspension components that
do not have the same performance charac­
teristics as the components originally instal­ led on your vehicle.
- Never use tire-rim combinations that have
not been approved by Audi.
Knee airbags
Description of knee airbags
Applies to: vehicles with knee airbags
The knee airbag system can provide supplemen­
tal protection to properly restrained front seat
occupants.
Fig. 240 Driver 's knee airbag
The driver knee airbag is in the instrument panel
underneath the steering
wheel¢ fig. 240, the
airbag for the passenger is at about the same
height in the instrument panel underneath the
glove compartment.
The knee airbag offers additional protection to
the driver's and passenger's knees and upper and
lower thigh areas and supplements the protec­
t ion provided by the safety belts.
If the front airbags deploy, the knee airbags also
deploy in frontal collisions when the deployment
threshold stored in the control unit is met
¢ page 2 79, More important things to know
about front airbags .
In addition to their normal safety function, safe­
ty belts help keep the driver or front passenger in
posit ion in a frontal collision so that the airbags
can provide supplemental protection .
..,.
285

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-If tests need to be performed with the en ­
gine running, there is additional danger due
to moving components (such as the ribbed belt, alternator and radiator fan) and from
the h igh-voltage ign it ion system .
- Never reach into the radiator fan. The elec­
tric auxiliary fan is controlled by tempera ­
ture and can switch on suddenly .
- Do not under any circumstances activate the
throttle inadvertently (for example, by hand
from the eng ine compartment) if the vehi­
cl e is stationa ry but the engi ne is ru nning
and a gear is engaged. Ot herw ise, the vehi­
cl e w ill sta rt to move immediately and t his
cou ld res ult in an accident .
- Pay atte ntion to the fo llow ing war nings list ­
ed when work on the fuel system or on the
electrical eq uipment is required.
- Do not smoke .
- Never work near open flames.
- Always have a working fire extinguisher
nearby.
- All work on the battery or e lectrica l system
in yo ur vehicle can res ult in injuries, chemi­
ca l burns, accidents or burns. Because of
this, all work must be performed
onl y by an
authorized Audi dealer or authorized Aud i
Service Facility .
- To reduce the risk of e lectric shock and in­
jury, never touch the following components when the eng ine is r unning or is being start­
ed:
- Ignition cable
- Other componen ts i n the ele ct ronic high-
voltage ignition system
- If you mus t check o r perfo rm wor k on t he
engine while it is runn ing:
- Set the parking brake and p lace the se lec­
tor lever in the P (park) position first .
- Always proceed with extreme caut ion so
that clothing, jewelry or long ha ir do not
become caught in the radiator fan, fan
belt o r other moving components or do
not come into contact with hot compo­
nents. Tie back lo ng ha ir before beginni ng
wo rk and do no t wear clot hing t hat can
hang down into the engine .
Check ing and F illing
- Limit your exposure to exhaust and chemi ­
cals to as short a time as possible
c> A .
A WARNING
-Ca lifornia Proposition 65 Warning:
- Engine exhaust, some of its constituents,
and certa in vehicle components conta in or
emit chemicals known to the State of Cali­
fornia to cause cancer and birth defects and reprod uctive harm . In add ition, certain flu­
ids conta ined in vehicles and certa in prod­
ucts of component wea r contain or em it
chemi cals know n to the State of Californ ia
t o cause cancer and b irth de fe cts or othe r
reprod uctive harm .
- Batte ry posts, te rm inals a nd rela ted a cces­
sor ies conta in lea d and le ad compo unds,
chemicals known to the State o f Cali fornia
to cause cancer and reproductive harms.
Was h hands after handling.
(LlJ) Note
When filling fluids, be su re not to m ix t he flu­
ids up . Otherwise severe malfunctions and en ­
gine damage will occur.
@ For the sake of the environment
You should regu lar ly check t he g ro u nd under
your vehicle in order to detect leaks quick ly . If
there are visib le spots from oi l o r other fluids,
bring your veh icle to an authorized A udi deal ­
er or authori zed Aud i Serv ice Facility to be
checked.
319

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Checking and Filling
Engine compartment overview
The most important check points .
Fig . 267 Typical location of the reservoi r, engine oil d ipst ick, and engine oil f iller open ing
(D Coolant expans ion tank (-L) ¢ page 325
@ E ngine oi l dipstick¢ page 322
® Engine oil filler opening ("e::r.) ¢ page 322
@ Eng ine oi l label* w ith VW standard
¢ page 321
® Brake fluid reservoir (0}) ¢ page 326
@ Applies to: vehicles w ith jump start point(+):
jump start point(+) under a cover
¢page 327, ¢page 375
0 Applies to: vehicles with the vehicle battery
in the engine compartment: vehicle bat­
tery(+) under the battery
cover¢ page 327,
¢page375
@ Bodygroundpoint(-) ¢page327,
¢ page375
® Washer fluid reservoir (0) ¢ page 328
@ Fuse housing ¢ page 3 71
The oil dipstick( @) and the engine oil fi ller
opening( @)¢ fig. 267 may be located in differ- ent places within the engine compartment de­
pending on the engine version .
,8. WARNING
Read and follow a ll WARNINGS before check­
i ng anything in the engine compartment
¢page 318 .
(D Tips
Applies to: vehicles with p lug-in hybrid dr ive:
note the informa tion for the coo lant expan­
s io n t ank
in¢ page 102 and for the vehicle
batte ry (+) in
¢page 102 .
Engine oil
If the engine oil level is too low
If you need to add engine oil, use an o il that i s
listed on the st icker .
The sticker is located at the
front of the eng ine
compartment ¢ page 321,
fig. 267.
321

Checking and Filling
Coolan t loss usu ally indicates there is a leak. Im ­
m ed iately drive your v ehicle to an authorized
Aud i dea ler or authorized Aud i Serv ice Facility
and have the cooling system inspected. If the
coo ling system is not leaking, a loss can come
from the coolant boiling through overheating
and be ing pushed out of the cool ing system.
.&_ WARNING
- The coo ling system is under pressure . Do
not open the coolant expans ion tank cap
when the eng ine is ho t. This inc reases the
risk of burns .
- T he coo lant add itive and the coolant can be
d angerous to your healt h. For this reason,
keep the coolant in the origina l container
and away from children . There is a risk of
poisoning .
- When working in the engine compartment,
remember that the rad iator fan can switch
on even if the ign ition is switched off, which
increases the risk of in jury .
-
CD Note
Do not add coolant if the expansion tank is
empty . Air could enter the cooling system and
damage the engine. If this is the case , do not
cont inue driving. See an authorized Audi deal­
er or author ized Audi Service Facility for assis­
tance .
Brake fluid
Fig. 271 Eng in e co mpar tment : cap on b rake flu id r eservo ir
O bserve the safety precautions ¢ page 318,
Working in the engine compartment .
326
Checking the brake fluid level
Read the b rake fluid level on the br ake fluid res­
ervoir ¢ page 321, fig . 267. The brake f lu id leve l
must be between the MIN and MAX markings
¢ ,& .
The brake f lu id leve l is monito red automa tically .
Changing the brake fluid
Have the brake fluid changed regularly by an au ­
thorized Aud i dea ler or authorized Audi Service
Facility.
.&_ WARNING
- I f the b rake fl uid leve l is below the MIN
marking, i t can impair the bra king effec t
and driving safety, wh ich increase the r isk o f
an accident. Do not continue driving . See an
authorized A udi dealer or authorized A udi
Serv ice Facility fo r ass istance.
- If the brake fl uid is old, b ubbles may form
in the brake system dur ing heavy braking.
This would impair braking performance and
driving safety, which increases the risk of an
accident .
- To ensure the brake system functions cor­
rectly, only use brake fluids that comp ly
w ith VW standard S0 l 14 or
FMVSS- 116 DOT 4 .
CD Note
-If the brake f luid level is above the MAX
marking, brake fluid may leak o ut over the
edge of the reservoi r and result in damage
to the vehicle .
- Do not ge t any brake fl uid on the vehicle
pai nt, b ecause it w ill co rrode the paint .
Battery
General warnings about batteries
Because of t he comp lex power supp ly, all work
on batter ies such as d isconnecting, replacing ,
etc., shou ld
only be pe rformed by an authori zed
Audi dealer or authorized A udi Service Fac ility
¢ _& . ~

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The term "vehicle battery" refers to the 12 Volt
batte ry in your vehicle.
Appl ies to: vehicles w ith plug-in hybrid drive: you
can find important informa tion abo ut yo ur high­
voltage battery in
r=> page 92.
Detail ed warning s for the vehicle battery :
~
Always wear eye protect ion .
&
Battery acid is high ly corrosive. Always
wea r protect ive g loves and eye protect ion .
.
®
Fire, spa rks, open flame and smoking are
forbidden .
A
A highly exp losive mixt ure of gases can
form when charging ba tte ries.
®
Always keep children far away from bat-
tery electrolyte and the battery .
~
Always follow the instructions in the oper -
ating manual.
A WARNING
All work on the battery or electrical system in
your vehicle can result in injuries, chemical burns, accidents or burns. Because of this, all
work m ust be perfo rmed
only by an author­
ized Aud i dea le r or autho rized Aud i Serv ice
Facili ty.
A WARNING
Cali fornia P roposi tion 65 Warn ing:
- Battery posts, termina ls and re lated acc es­
sories contain le ad and lead compounds,
c hem ica ls known to the St ate of C alifornia
to cause cance r and rep roductive problems.
Wash hands after handling.
(D Note
If the veh icle w ill be par ked for long periods
of t ime, pro tect it agains t the col d so that i t
w ill not be destroyed by "freezing"
q page 32 7, Charging the vehicle battery .
Checking and Filling
Charging the vehicle battery
Applies to: veh icles w ith vehicle battery in t he e ng in e com ­
partment
Fig . 272 En g in e co mpa rtm en t: c onnect ions for charge r
a nd j ump start c abl e
Applies to: vehicles w ith jump s ta rt point(+)
Fig . 2 73 Engin e compar tm ent: c onn ect io ns fo r charge r
a n d j ump s ta rt c able
Observe the safety precautions r=>page 318,
Working in the engine compartment .
Vehicles with plug-in hybrid drive*: r=> page 102,
Jump s tar t.
Requirement: only use chargers with a ma ximum
charging current of 30 amp s/14.8 Volt s.
The ve­
hicle battery cab les remain connected.
Depend ing on the engine, the battery is located
in the engine compartment or i n the l uggage
compartment. For vehicles w ith the battery in
the luggage compartment, a jump start point
that is also used for battery charg ing is located i n
the engine compartment . The battery is a lways
charged in the eng ine compartment. The g round
poin t
0 is always loca ted on the vehicle chass is .
.,. Read the warnings r=> .&.. in General warnings
about batteries on page 32 7
and r=> .&._.
.,. Switch off the ig nitio n and all electrical equ ip­
ment .
.,. Open the hood r=> page 320.
327