2018 AUDI A3 SEDAN brake fluid

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Active lane assist*
c:> page 134
Start/Stop system*
c:>page 79
Start/Stop system*
c:> page 79
Convenience key*
c:> page 79
Engine start system
c:> page 26
Transmission
c:> page 89
USA m odels :
Electromechanica l parking brake
c:> page 24
Canada models :
Electromechanica l parking brake
c:> page 24
Elect romechan ical park ing brake
c:> page 24
Hill hold ass ist
c:> page 27
USA models :
Speed warning system*
c:> page 120
Canada models :
Speed warning system *
c:> page 120
USA models:
Cruise control system*
c:> page 120
Canada mod els :
Cruise control system*
c:> page 120
Adapt ive cruise control*
c:> page 126
Adaptive cr uise control*
c:> page 126
Ac tive lane ass ist*
c:> page 134
Side assist*
c:>page 140
~v
pre sense*
c:>page 133
Coc kpit o ver view
High beam ass istant*
c:> page 50
High beams
c:> page 50
e-tron: electric dr ive ready mode*
c:> page 98
e-tron: electric dr ive ready mode*
c:> page 96
e-tron: charging system*
c:> page 115
e -tron: charging system*
c:> page 115
e-tron: gasoline eng ine*
c:> page 98
e-tron: tank system*
c:> page 103
e-tron: charging system*
c:>page 115
BRAKE/((D) Brake system
If this indica tor light tur ns on, t here is a malf unc ­
tion in the brake system .
1111 (USA models) /. (Canada model s)
Brakes : stop vehicle and ch eck brake fluid level
Stop the veh icle a nd check t he brake fl uid level.
See a n author ized Audi dealer or author ized Audi
Se rvice Facility for assis tance if ne cessa ry.
1111 (USA model s) /. (Canada model s)
Warning! No brake booster
If the brake booste r is not working, you have to
use much more force w hen braking the vehicle.
See a n author ized Audi dealer or authorized Audi
Service Facility for assistance .
1111 (USA models ) /. (Canada models )
Brakes: malfunction! Please stop vehicle safel y
..,_
23

Cockpit overv ie w
If th e indicator light t urns on and th is message
appears, there is a malfunction in the brake booster.
I f t he ABS indica to r li ght
rlll) (USA mode ls) /
«~a (Canada mode ls), the ESC indicator light Bl
and the brake system indicator light 11111 (USA
models)
I . (Canada mode ls) turn on and this
message appears, then the ABS, ESC and braking
d istr ibut ion are
malfunctioning¢ &.
Do not continue driving . See an authorized Audi
dea ler or aut horized Aud i Serv ice Facility for as ­
sistance
¢ & .
11111 (USA models )/. (Canada model s) Park­
ing brake: malfunction! Safely stop vehicle. See
o w ner 's manual
- If the indica to r li ght a nd the message appear
when the vehicle is stationar y or after switch­
ing the ignition on ,
check if you can release the
parking brake . If you cannot re lease the park ­
ing brake, see an authori zed Aud i dea ler or au­
thorized Audi Serv ice Facility. If you can re lease
the parking brake and the message still ap ­
pears, see an authorized Aud i dealer or author­
ized Audi Service Facility immed iately to have
t h e malfunct ion corrected.
- If the indicato r light and message appea r while
drivin g,
the hill sta rt assist or emergency b rak­
i ng func tion may be malfunctioning. It may no t
be possib le to set t he pa rking bra ke or release
it once it has been set . Do not pa rk your ve hicle
on hi lls. See an authorized Audi dealer or au ­
thorized Audi Service Facility for assistance .
Brake b oost er: limited fun cti onality . You can
con tinue d riv ing. Ple ase contact Service
There is a malfunction in the brake booster. The
b rake booster is available, but its effec tiveness is
reduced . B raking be hav io r may be diffe rent from
how it norma lly functions and t he b rake pedal
may vibrate.
Dr ive to an a uth o rized Aud i dea le r or a uth orized
Aud i Serv ice Facil ity immediately to have t he
mal funct ion corrected .
Brake booster: deactivated . S ee own er's manual
24
The brake assist (brake booster) rema ins active
for a brief period of time after switc hing
off the
i gnition. To secure the vehicle from ro lling away,
select the "P" selector lever posit ion or set the
parking brake .
A WARNING
-Read and fo llow the warnings in
¢ page 318, Working in the engine com­
partment
befo re opening the hood and
checking the brake fluid level.
- If the brake system indicator light does not
turn
off or it turns on wh ile driving, the
brake flu id leve l in the reservo ir is too low,
an d this incre ases the risk of an accident.
Stop the vehicle and do not continue driv ­
ing . See an authorized Audi dea ler or a u­
thorized A udi Service Facility for assistance.
- I f the brake system indicator light t urns on
together with the ABS and ESC indicator lights, the ABS/ESC regu lating function may
be malfunct ion ing. Functions that stabilize
the vehicle are no longer available. This
could cause the rear of the vehicle to
swerve, wh ich increases the r is k that the ve­
hicle will slide. Do not cont inue driving. See
an authori zed A udi dealer or authori zed
Aud i Serv ice F acility fo r ass ist ance.
PARK/(®)/~ Electromechanical parking
brake
If the -(USA mode ls) I. (Canada models)
i ndicator light turns on, the parking brake was
set.
If the
-(USA mode ls)/ . (Canada models) in ­
dicator light blinks, the braking force is not build ­
i ng up eno ugh or not building up at a ll. Se lect the
P selector lever posit ion to help secure the vehi­
cle . Make sure the indicator light is
off before you
start driving.
riJ Parking brake: malfunction! Please contact
Ser vice
There is a ma lfunction in the parking brake. Drive
to an authorized Audi dea ler or authorized Audi
Service Facility immediate ly to have the malfunc-
tion corrected.
.,..

Intelligent Technology
-There is no vehicle stabilization when ESC/
ASR are switched off.
(D Tips
- ESC/ ASR cannot be switched off or sport
mode cannot be switched on if the cruise
control system * or the adaptive cruise con­
tro l* is switched on.
- Malfunctions in the Audi magnetic ride*
may make it impossible to switch the ESC/
ASR off or to switch sport mode on.
Brakes
New brake pads
New brake pads do not achieve their full braking
effect during the first 250 mi (400 km). They
must be "broken in" first. However, you can com­
pensate for the slightly reduced braking force by
pressing firmly on the brake pedal. Avoid heavy
braking dur ing the break-in per iod .
The break-in period can be considerably longer
for vehicles with ceramic brake rotors*. However,
you can compensate for the slightly reduced
braking force by pressing f irmly on the brake
pedal. Avoid heavy brak ing dur ing the break- in
pe riod .
Wear
Brake pad
wear depends largely on the way the
veh icle is driven and on operat ing cond itions .
This is especially true if you are driving frequently
in the city and on curves or with a sporty driving
style.
Operating noise
Noises may occur when braking depend ing on the
speed, braking force and outs ide cond itions such
as temperature and humidity.
Noises may become more apparent at lower
speeds due to the nature of the materials in the
ceramic brake rotors*.
Effect of water and road salt
In certain situations, for example after driving
through water, in heavy rain, after overnight con­
densat ion or after washing your car, the braking
150
effect can be reduced by moisture or ice on the
brake rotors and brake pads . The brakes must be
"dried" first with a few carefu l brake applica ­
tions.
At higher speeds and with the windshield wipe rs
turned on, the brake pads press against the brake
rotors for a short amount of time . This action,
which is not felt by the dr iver, happens at regular
i ntervals and ensures a better reaction t ime for
the brakes in wet weather .
The brak ing effect can also be reduced if you are
driv ing on salted roads and you do not app ly the
brakes for long periods of time. The layer of salt
on the brake rotors and pads must be worn off
first whe n the brakes are applied .
Due to its surface, the ceram ic brake rotor* ab­
sorbs moisture in certain s ituations . Therefore,
there will temporarily be less braking force than
when the brakes are dry . You can compensate for
th is by press ing the brake pedal harder.
Corrosion
Leaving the vehicle parked for long periods of
time, low mileage and avoiding heavy braking
can contribute to corros ion on the brake rotors
and to dirty brake pads.
If you usually avoid heavy braking or if there is
corrosion present, occasional heavy brak ing at
high speeds is recommended to clean the brake
rotors and
pads~.& .
Brake system malfunction
If you notice that the brake pedal travel has sud­
denly
i ncreased, then a brake circuit in the dua l­
c ir cuit brake system may have malfunctioned.
Drive to an authorized Audi dealer or authorized
Audi Service Fac il ity immed iately to have the
problem corrected. On the way there, drive with
r educed speed and keep in mind that you will
need a longer distance to stop and you will need
to press the brake pedal harder.
Low brake fluid level
When the brake fluid level is low, malfunctions in
t h e b rake system may occur. The b rake flu id level
is electronically monitored.
II>-

Checking and Filling
-Do not a pply u nder body protectant in t he
exhaust system area, because this increases
the risk of fire.
On Board Diagnostic
System (OBD)
The On-Board Diagnostic System monitors the
engine and transmission componen ts that influ ­
ence emissions.
F ig . 2 64 Footwell o n left s ide o f th e veh icle : co nn ect io n
port fo r the O n-Boa rd D iagno stic Syste m (OBD)
On-Board Diagnostic System
Engine data can be read out at the On-Board D i­
agnostic System connec tion po rt usi ng a special
tes ting device
~ fig . 264.
Indicator light
If thP ¢.j indicato r light bli nks or tu rns o n, there
is a malfunction that is causi ng poor emissions
qua lity and tha t could damage the ca talytic con­
ve rte r.
Drive s lowly to an author ized A udi dealer or au ­
thor ized Audi Se rvice Facility to have the ma l­
function co rrected .
The indicator light can also tur n on if t he fuel fill­
er cap is not closed
correct ly ~ page 315.
A WARNING
Incorrect use of the connection port fo r the
O n- Board Diag nostic System can ca use mal­
functions, which can then result in ac ciden ts
and ser ious injuries.
-Only allow a n author ized Audi dealer or au­
t h o riz e d Aud i Ser vice Faci lity to re ad o ut the
engi ne dat a.
318
-
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
checking and fill ing fluids, there is a risk of in­
jury, scalding, accidents , and burns . For thi s
reason, follow all the w arnings and general
safety p re caut ion s prov ided in the following in­
formation. The engine compartment is a dan­
gerous are a.
~ .&,.
A WARNING
To reduce the ris k of injur ies, comp lete the
follo wing steps before opening t he hood:
- Tur n t he engine off.
- Switch the igni tio n off.
- Set the park ing brake.
-Move the selector lever into the P position.
-N ever open the hood when there is steam o r
coo lant escaping from t he engine compart­
ment, because there is a risk that yo u could
be burned . Wait unt il no steam or coolant is
escapi ng.
- L et the eng ine cool down .
-Keep children away from the eng ine com-
pa rtment .
-Never sp ill fluids on a hot engine . These flu­
ids (such as the anti-freezing agent con­
tained i n the coolant) ca n ignite .
- Avoid short c ircuits in the electrical system .
-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 r isk of persona l injury .
-Never open the cap on the coolant expan­
sion tan k when t he engine is warm . The
coo ling system is under p ressure.
-To protect your face, hands , and a rms from
hot steam or coolant , cover the cap wit h a
large cloth when op ening .
-Do not remove the engine cover under any
circumstances. This increases the r isk of
burns .

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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
¢ _& . ~

Wheels
vehicle's Gross Veh ic le Weig ht
R ati ng
("GVWR").
The "GVWR" includes the weight
of the basic vehicle, all factory in­
stalled accessories, a full tank of
fuel, oil, coolant and other fluids
plus maximum load. The maxi­
mum load includes the number of
passengers that the vehicle is in­
tended to carry ("seating capaci­
ty") with an assumed weight of 150 lbs . (68 kg) for each passen­
ger at a designated seating posi ­
tion and the total weight of any luggage in the vehicle. If you tow
a trailer, the weight of the trailer
hitch and the tongue weight of
the loaded trailer must be includ­
ed as part of the vehicle load .
The
Gro ss Ax le W eight Rating
("GAWR") is the maximum load
that can be applied at each of the
vehicle's two axles .
T he fact that there is an upper
limit to your vehicle's Gross Vehi­
cle Weight Rating means that the
total weight of whatever is being
carried in the vehicle (including
the weight of a trailer hitch and
the tongue weight of the loaded
trailer) is limited . The more pas­
sengers in the vehicle or passen -
344
gers who are heavier than the
standard weights assumed mean
that less weight can be carried as luggage .
The Gross Vehicle Weight Rating and the Gross Axle Weight Rat ing
are listed on the safety compli­
ance sticker labe l located on the
driver's side B-pillar.
1.8. WARNING
Overloading a vehicle can cause loss of vehicle control, a crash
or other accident, serious per­
sonal injury, and even death.
-Carrying more weight than your vehicle was designed to carry will prevent the vehicle
from handling properly and increase the risk of the loss of
vehicle control.
-The brakes on a vehicle that has been overloaded may not
be able to stop the vehicle
within a safe distance .
-Tires on a vehicle that has been overloaded can fail sud ­
denly, including a blowout and
sudden deflation, causing loss
of contro l and a crash.
-Always make sure that the to­ tal load being transported
-..