2018 AUDI A3 SEDAN fuel

Checking and Filling
~ After the fuel pump has switched off, wait five seconds before removing it to allow the rest of
the fuel to finish dripping into the fuel tank.
~ Turn the fue l cap clockwise until you hear it
lock.
~ Close the fuel filler door and then press on the
left side until it latches .
The correct fuel type for your vehicle can be
found on a label located on the inside of the fuel
filler door. For additional information on fuel,
see
Qpage 314 .
For the tank capacity in your vehicle, refer to the
Technical Data
Qpage 382.
To reduce the risk of fuel leaking out or vapors
escaping, make sure that the fuel tank is closed
correctly. Otherwise
thP ¢..iff indicator light will
turn on.
If the centra l locking system malfunctions, the
fuel filler door may emergency release
Qpage317.
A WARNING
An improper fueling procedure and improper
handling of fuel can lead to explosions, fires,
severe burns and other injuries.
-Do not smoke and keep away from open
flames.
-The ignition must be switched off when re­
fueling.
-Cell phones, radio devices and other radio
equipment should always be switched off
when refueling. Electromagnetic rays could cause sparks and start a fire.
-If you do not insert the fuel pump nozzle all
the way into the filler tube, then fuel can
leak out. Spilled fuel can ignite and start a
fire.
-Never get into the vehicle when refueling. If
there is an exceptional situation where the
vehicle must be entered, close the door and
touch a metal surface before touching the
fuel pump nozzle again. This will reduce the
risk of electrostatic discharge that can cause
flying sparks. Sparks can start a fire when
refueling.
316
A WARNING
We recommend that you do not transport any
fuel containers in the vehicle. Fuel could leak
out of the container and ignite, especially dur­
ing an accident. This can cause explosions,
fires and injuries.
-If you must transport fuel in a fuel contain­
er, please note the following:
-Always place a fuel container on the
ground before filling. Never fill the fuel
container with fuel while it is in or on the
vehicle. Electrostatic charge can occur
while refueling and the fuel vapors could
ignite .
-For fuel containers made of metal, the
fuel pump nozzle must always maintain
contact with the container to reduce the
risk of static charge.
-Insert the fuel pump nozzle as far as pos­
sible into the filler opening while refuel­
ing.
-Follow legal requirements when using,
storing and transporting fuel containers.
-Make sure that the fuel container meets
the industry standards, for example ANSI
or ASTM F852-86.
@ Note
-Remove fuel that has overflowed onto any
vehicle components immediately to reduce
the risk of damage to the vehicle.
-Never drive until the fuel tank is completely
empty. The irregular supply of fuel that re­
sults from that can cause engine misfires.
Uncombusted fuel will enter the exhaust
system and increase the risk of damage to
the catalytic converter.
@I For the sake of the environment
Do not overfill the fuel tank, otherwise fuel
can leak out when the vehicle is warming up.
© Tips
The fuel filler door on your vehicle does not lock if you lock the vehicle from the inside us-
ing the central locking switch.
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(D Tips
Fuel can age and may lead to problems when
starting . Audi recommends replacing the fuel
in your vehicle within six months.
Fuel filler door emergency release
If the central locking system is fault y, the fuel
filler door con be unlocked manually.
Applies to: version 1
F ig. 262 R ig ht rear l ugg age comp artment : eme rgency re ­
l ease (example )
Applies to: version 2
F ig . 26 3 Rea r of th e ve hicle: right rear se at fol ded forwa rd
Emergen cy relea se in the lug gage
compartment
Applies to: vers ion 1
The emergency opening mechanism is located
behind the right side trim pane l in the luggage
compar tment .
~ Remove the cover in the side panel.
~ Loosen the loop from the reta iner and then pull
on the loop carefully -arrow -
i=> fig. 262 i=> (D.
The filler door is released.
~ Press on the left side of the fuel fi ller door to
open it
i=> page 315, fig . 260.
P lug-in hybrid dr ive* : read and follow the inst ruc­
tions under
i=> page 103 .
Checking and Filling
Emergency relea se behind the rear seat
back rest
Appl ies to: version 2
The emergency releas e is located behind the
right rear seat.
T he pull cab le for the emergency re lease is locat­
ed on the cover .
~ To access the eme rgency re lease, fold the right
backrest forward
i=> page 66.
~ Remove the cover ~ from the tr im panel.
~ Carefully p ull the cover towa rd the center of
the vehicle at a 45° ang le
-arrow- ¢ fig. 263
i=>(D . The tab on the cover must point forward
in the direction you are pulling when pulling on
the cover .
~ Press on the left side of the fue l filler door to
open it
¢ page 315 , fig. 260.
(D Note
Only pull on the loop/cover until you fee l re­
s istance . Yo u will not hear it release . Other­
wise you could damage the emergency re­
l ease mechanism.
Catalytic converter
The vehicle may only be driven w ith un leaded
gasol ine, otherwise the cata lyti c converte r wi ll be
dest royed.
Never dr ive until the tank is completely empty .
The ir regu lar supply of fuel that resu lts from that
can cause eng ine misfires. Uncombusted fuel will
en ter the exhaust system , which c an cause over­
hea ting and damage to the cata lyti c conver ter .
A WARNING
The temperat ure o f the exhaust system is
high , both when driv ing and after stopping
the eng ine.
-
-Never touch the exhaust tail pipes once they
have become hot . This cou ld resu lt in burns.
- Do not par k your veh icle over flammable
materials such as grass or leaves because
the high temperature of the emissions con­
trol system could start a fire.
317

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 .

u. 00 .-< N l'­ N .-< 0 N > 00
-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

Checking and Filling
If the recommended engine oil is not available,
in an eme rg enc y you may add a maximum of 1
quart(! liter) of ACEA C3 or API SN engine oil
one tim e until the next oil change.
F or more information on the correct engine oil
for your vehicle, contact an authorized Audi dea l­
er or authorized Audi Service Facility . Have the oil
changed by an authori zed Audi dealer o r author­
ized Service Fac ility .
Audi re commend s
((#Castrol I llt/li{:t;'{g Frtw.:;-..·-..d.f'/,'JAL
Audi r ecommends using th e Lon g Lif e high ­
perf orm ance eng in e oil from Audi Genu in e
Parts .
Checking the engine oil level
The engine oil dipstick varies depending on the
engine type .
Fig . 268 Oil d ipsti ck: checking th e engine oil le vel (exa m­
p le )
Observe the safety precaut ions ¢.& in Working
in the engine compartment on page 318 .
.. Park your vehicle on a level surface.
.. Shut the engine off when it is warm .
.. Wait approx imately two m inutes .
.. Open the hood ¢ page 320 .
.. Remove the oi l dipstick¢ page 321, fig. 267,
wipe it off with a clean cloth and insert it a ll the
way in again .
.. Remove the o il dipstick again and then read the
oil
level ¢ table on page 322.
.. Add engine oil if necessary c:> page 323.
322
Areas on the o il dipstick 9 fig . 268 .
(D If the engine oil leve l is just before the
mark ing
(D , then engine oil must be added .
See¢@.
@ Do not add engine oil.
(D Note
- T he engine o il level must not be below the
ma rking
(D , because this increases the risk
of engine damage.
- After add ing engine oil, the oil leve l must
not be above the marking @, because this
increases the risk of catalytic converter and/
or engine damage . Do not start the engine .
Contact an authorized Audi dealer or au­
thorized Audi Service Facility to have excess eng ine oil extracted if necessary .
(D Tips
- The engine oil consumption may be up to
0.5 quart/600 miles (0.5 liter/1,000 km),
depending on driving style and operating
conditions. Consumpt io n may be h igher
dur ing the fi rst 3,000 mi les (5,000 km) . Be­
c ause of this , the eng ine o il level must be
che cked regularly.
It is best to check each
t ime you refuel your vehicle and before long
drives .
- In order to prov ide effective l ubrication and
cooling of interna l engine components, a ll
internal combustion engines consume a cer ­
tain amount of oil. O il consumption varies
from engine to engine and may change sig­ nificantly over the life of the engine. Typi­
cally, eng ines with a specif ied break-in peri­
od consume more oil during the break-in pe ­
riod than they consume after o il consump­
t ion has stabilized .
- Under normal condit ions, the rate of oil
cons umption depends on t he quality and
viscosity of the oil, the RPM (revo lutions per
mi nute) at which the engine is ope rated, the
ambien t temperature and road conditions .
Further factors are the amount of oi l dilu­
tion from water condensation or fuel resi­ due and the oxidation level of the oil. As any
eng ine is subject to wear as m ileage builds
Ii>-

Wheels
Wheels
Wheels and T ires
General information
~check your tires regularly for
damage (punctures, cuts, cracks
and bulges). Remove foreign ob ­
jects from the tire tread.
~ If driving over curbs or similar
obstacles, drive slowly and ap­ proach the curb at an angle.
~Have faulty tires or rims re­
placed immediately.
~ Protect your tires from oil,
grease and fuel.
~ Mark tires before removing
them so that the same running
direction can be maintained if
they are reinstalled.
~Lay tires flat when storing and
store them in a cool, dry location
with as little exposure to light as
possible.
_&. WARNING -
-Never drive faster than the maximum permitted speed
for your tires. This could cause
the tires to heat up too much.
This increases the risk of an
accident because it can cause
the tire to burst .
-Always adapt your driving to the road and traffic condi-
330
tions . Drive carefully and re­
duce your speed on icy or slip­
pery roads . Even winter tires
can lose traction on black ice.
(@ Note
-Please note that summer and
winter tires are designed for
the conditions that are typical
i n those seasons . Aud i recom­
mends using winter tires dur­
ing the winter months . Low
temperatures significantly de­
crease the elasticity of summ­
er tires, which affects traction
and braking ability. If summer
tires are used in very cold
temperatures, cracks can form
on the tread bars, resulting in
permanent tire damage that
can cause loud driving noise
and unbalanced tires.
-Burnished, polished or chromed rims must not be used in winter driving condi­
t ions. The surface of the r ims
does not have sufficient corro­
sion protection for this and
could be permanently dam ­
aged by road salt or similar
substances.

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Glossary of tire and loading
terminology
Accessory weight
means the combined weight ( in
excess of those standard items
which may be replaced) of auto­ matic transmission , power steer ­
ing, power brakes, power win­
dows, power seats, radio, and
heater, to the extent that these
items a re available as factory- in­
stalled equipment (whether i n­
stalled or not) .
Aspect ratio
means the ratio of the height to
the width of the tire in percent .
Numbers of 55 or lower indicate a
low s idewall for improved steer­
ing response and better overall
handling on dry pavement.
Bead
means the part of the tire that is
made of steel wires, wrapped or
reinforced by ply cords and that is
shaped to fit the rim .
Bead separation
means a breakdown of the bond
between components in the bead .
Wheel s
Cord
means the strands forming the
plies in the tire .
Cold tire inflation pressure
means the tire pressure recom­
mended by the vehicle manufac ­
turer for a tire of a designated
size that has not been driven for
more than a couple of miles (kilo­
meters) at low speeds in the
three hour period before the tire pressure is measured or adjusted .
Curb weight
means the weight of a motor ve­
hicle with standard equipment in­
cluding the maximum capacity of
fuel, oil , and coolant, air condi­
tioning and additional weight of
optional eq uipm ent .
Extra load tire
means a tire designed to operate
at higher loads and at highe r in­
flation pressures than the corre­
sponding standard tire . Extra load
tires may be identified as "X L",
"xl", "EXTRA LOAD", or "RF" on
the sidewall.
.,.
333

Wheels
-The tire must flex more if the
tire pressure is too low or if
the vehicle speed or load are
too high. This heats the tire up
too much. This increases the
risk of an accident because it
can cause the tire to burst and
result in loss of vehicle con­
trol.
-Incorrect tire pressure in­ creases tire wear and has a
Tire pressure table
Please note that the information
contained in the following table
was correct at the time of print­
ing, and the information is sub­
ject to change. If there are differ­
ences between this information
and the tire pressures specified
on the label on the driver's side B­
pillar, always follow the specifica­
tion on the B-pillar label
c> page 341 , fig. 2 77.
Model/ Tire designation
negative effect on driving and
braking behavior, which in­
creases the risk of an accident.
@ Note
Replace lost valve caps to re­
duce the risk of damage to the
tire valves.
@ For the sake of the environment
Tire pressure that is too low in­ creases fuel consumption.
Make sure that the tire designa­
tion on your tire matches the des­
ignation on the tire pressure label
and the tire pressure table.
The following table lists recom­ mended tire pressures in cold
tires according to the load and
the size of the tires installed.
Tire pressure
Engine Normal load Maximum load
(up to 2/3*
people)al
front rear front rear
PSI kPA PSI kPA PSI kPA PSI kPA
A3 sedan: 225/40 R18 92Y 35 240 32 220 36 250 36 250
2.0 L
225/45 R17 91H 33 230 30 210 41 280 41
280
4-cylinder
225/40 R18 92H 36 250 33 230 41
280 41 280
235/35 R19 91 Y 33 230 30 210 38 260 41 280
342