2018 AUDI A3 SEDAN cooling

u. 00 .-<
@ Left additional display (divided in
two sections in the enhanced view)
There may be addi tional indicato r lights in the
tachomete r@ , the speedome ter
(i) , th e sta tus
line ® and, depending on the instrument clus ­
ter, above or below the central
area @.
The fo llow ing pages will primar ily show ill ustra ­
tions of the mu lti-co lor ana log ins trumen t clus ­
ter* . The display and/o r posit ion of t he e lement
shown may vary in monochrome instrument cl us­
ters or in the A udi v irtual cockpit* .
(D Tips
-Depending on vehicle equipment, the in ­
str ument ill umination (need les and gauges)
may t urn on when the lights are off and the
i gnition is sw itched on. The illumination for
t h e gauges reduces automat ica lly and even­
tua lly turns off as br ightness outside in­
creases . This func tion rem inds the dr iver to
tu rn t he low beams on at the app ropr iate
t im e.
-You can select the units used for tempe ra­
tu re, speed and othe r measureme nts in t he
Infotainment system
¢page 2 43 .
Coolant temperature indicator
The coolant temperatu re display (D ¢ page 10,
fig. 4
or ¢ page 10, fig . 3 only functions when
the ignition is switc hed on . To prevent engine
damage, please observe the following notes
about the temperature ranges.
Cold rang e
If onl y the L EDs at the bottom o f th e ga uge tu rn
on, the engine has not reached operating tem ­
pe rature yet. Avoid high engine speeds, full ac ­
celerat ing and heavy engine loads .
Normal range
The engine has reached its oper ating temper a­
ture once the LEDs up to the center o f th e ga uge
turn on. If
the . indicator lig ht in the instru­
ment cluster display turns on, the coolant tern -
~ perature is too high ¢ page 25 .
N .-< 0 N > 00
Coc kpit o ver view
Vehicles without a coolant temperature
indicat or
T he . indicator light t urns on when the coolant
temperat ure is h igh
¢ page 25. Refer to ¢(!) .
(W} Note
-Aux iliary headlights and ot her accesso ries in
fro nt of t he coo ling-air intake impa ir th e
cooling effect o f the coo lant. This increases
the risk of the engine overheating dur ing
hig h outside temperat ures and heavy en­
gine load .
-The front spoi ler a lso helps to distribute
cooling a ir correctly while driv ing. If the
spoiler is damaged, the coo ling effec t w ill
be impa ired a nd the r isk of the eng ine ove r­
heating w ill increase. See an autho riz ed
Aud i dea ler or a uthor ized Audi Se rvice Fa ­
ci lity for assis tan ce .
-Vehicles without a coolant temperature dis­
play: to promote a lo ng e ngine serv ice li fe,
a voiding h igh engine spee ds, full acce lera ­
tion and heavy engine loads during app rox i­
mate ly the first 15 minutes when the en ­
gine is cold is recommended. The amount of
t ime that the eng ine is co ld depends on the
outside temperature.
Tachometer
The tachometer displays the engine speed in rev­
olutions per minute (RPM).
T he beginning of t he red zone in the tachometer
indicates the maxim um permissible engine speed
for all gea rs once the engine has bee n broken in
and when it is warmed up to operating tempera­
ture . Before reach ing the red zone, you sho uld
sh ift into the next h igher gear, choose the "D" or
" S" se lecto r lever pos it io n, or remove yo ur foot
from the ac cele ra tor ped al.
Applies to: vehicles with plug-in hybrid drive
Depend ing on the vehicle equipment, there a re
diffe rent display fo rmats
available ¢ page 95. ...,
11

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Red indicator light s
--------------
Central indicator light
c>page20,
Aud i pre sense*
c>page 131
USA models :
Brake system ./
c>page23
Canada mod els:
Br ak e sys tem ./
c> page23
USA models :
Elect romechan ical park ing brake
c> page24
Canada models :
Electromechanical parking brake
c>page24
Cooling system
c>page 25
Eng ine oi l pressu re
c>page 25
A lternator
c>page 25
Safety belt
c> page26
Electromecha nical steer ing./
c> page 151
Steer ing lock
c>page26
Engine stop whi le driving
c> page27
Transmission
c>page 89
Hood
c> page27
Adapt ive cr uise control*
c>page 125
Coc kpit o ver view
e-tron: system wa rni ng*
c> page 96
e-tron: charging system*
c> page 115
Yellow indicator lights
--------------Centra l ind icator light
c> page 20 ,
Brake booster*
c> page 23
Electron ic Stab il izat ion Control
(ESC)
./
c> page 27
Electronic Stab ilization Contro l
(ESC)
./
c> page 27
Electronic Stab iliza tion Contro l
(ESC)
c> page 148
USA models :
An ti-l ock b raking system (ABS) ./
c>page 27
Canada model s:
Anti -lock braking system (ABS)./
c> page 27
Safety systems ./
c>page 26
USA models:
Brake pads
c>page 27
Canada model s:
Brake pads
c> page 27
Electromechanical parking brake
c> page 24
Hill hold assist
c>page 27
Tire pressure*
c> page 348, or c> page 350
Tire pressure*
c> page 348, or c> page 350
21

u. 00 .-< N l'­ N .-< 0 N > 00
~ (USA models) / 6] (Canada mod­
els ) Pa rking brake auto release una vailable
If t his message appea rs, press the brake pedal
fi rst and then release the pa rking bra ke.
~ll. PARK BRAKE (USA model s) / [<~) ( Can ada mod­
e ls) Parking brake : caution! V ehicle park ed too
s tee p
If the indicator light blinks and the message ap­
pea rs, the re is not enough brak ing power to se­
cure the veh icle . T he brakes have ove rheated. The
ve hicl e co uld ro ll away even on a small incli ne.
@ Tips
For addit iona l information on the park ing
b rake, see¢
page 81.
- L Cooling system
• Turn off engine and che ck coo lant le vel! See
o wner 's manual
• Stop v ehicl e and check coolant le ve l! S ee
owner 's manual
The coolant level is too low .
Do not cont inue driving and switch the engine
off. Check the coolant level ¢
page 324.
Plug-in hybrid drive *: refer to ¢page 102.
- If the coolant level is too low, add coolant
¢page 325. O nly cont inue dr iv ing o nce the in ­
dicato r light turns off .
• Coolant temp eratur e too high! Let engine
run with vehicle stationar y
Let the eng ine run at idle for a few minutes to
cool off, until the ind icator light turns off.
- If the indicator light does not turn off, do not
continue driving the vehicle. See an authorized
Audi dealer or authorized Audi Service Facility
for assistance .
A WARNING
-Never open the hood if you ca n see o r hear
steam o r coolant escap ing fro m the eng ine
compartment. This inc reases the risk of
Coc kpit o ver view
burns. Wait until yo u no longer see o r hear
steam or coo lant escaping.
- The engine compartment in any vehicle can
be a dangerous area. Stop the engine and
allow it to cool before working in the eng ine
compartment. Always follow the informa­
tion found in
¢ page 318, Working in the
engine comportment .
@ Note
Do not continue dr iv ing if the . indicator
light turns on as this increases the risk of en­
gine damage.
• S w itch off engine! Oil pressure too lo w
Stop the engine and do not continue driving.
Check the eng ine oi l level ¢
page 322 .
-If the engine oi l level is too low, add engine oil
¢
page 321 . Only continue driving once the in­
dicator light turns off.
- If the engine o il level is correct and the indica ­
tor light still turns on, turn the engine off and
do not cont inue driving. See an authorized Audi
dealer or authorized Audi Service Facility for as ­
sistance .
(D Tips
The oil pressure warni ng is not a n oil leve l in­
d icator. Always check the oil level regularly .
1:::1 Generator/Vehicle battery
• Electrical system: malfunction! Batt ery is
not charging
There is a malfunction in the alternator or the ve­
hicle electr ical system .
Drive to an authorized Audi dealer or authorized
Audi Service Facility immed iate ly. Turn off a ll un­
necessary electrical equipment because it will
dra in the battery . See an author ized Audi dealer
o r authorized Aud i Serv ice Facility if the battery
c h arge leve l is too low.
(•] F.lectrical sy stem: malfunction! Re start not
po ssible . Plea se cont act Ser vice
.,.
25

Warm and cold
Warm and cold Climate control system
Description
The climate control system circulates , warms or
coo ls, and removes humid ity from the air in the
veh icle interior . It is the most effective when the
windows and panorama g lass roof* or power top*
are closed. If there is a build-up of heat inside
the vehicle, ventilation can help to speed up the
coo ling process.
Pollutant filter
The pollutant filter removes pollutants such as
dust and po llen from the air.
Key recognition
Various sett ings are stored and ass igned to the
remote control key being used.
These settings are different when the power top* is open or closed .
Presetting
Several functions can be preset in the Infotain­
ment system.
Select in the Infotainment system:
IMENU ! but­
ton
> Vehicle > left control button > Air condi­
tioning
A WARNING
Poor visibility can lead to accidents.
- For safer driving, keep all windows free of
ice, snow and fog.
- Become familiar with the correct use and
function of the climate control system as
quickly as poss ible, espec ia lly with the de­
frosting and defogging functions.
- When the temperature is below freezing, only use the windsh ield washer system after
68
the windshield has been warmed by the cli­
mate control system. The washer fluid could
freeze on the windshie ld and impair visib ili­
ty .
@ Note
-If you suspect that the climate contro l sys­
tem is damaged, switch the system off to
prevent further damage and have it checked
by an authorized Aud i dealer or authorized
Audi Serv ice Facility.
- Repa irs to the Aud i climate control system
require special technical knowledge and
special tools . See an authorized Aud i dealer
o r authorized Aud i Serv ice Facility .
@ For the sake of the environment
-To save fuel, turn off the climate control
system cooling mode by press ing the A/C
button. This w ill also reduce emissions . The
climate control system is off when the LED
in the button turns off.
- In vehicl es w ith the efficie ncy prog ram*,
yo u can find other consumpt ion information
and more economy tips ¢ page 19.
© Tips
- To prevent int erference with the heat ing
and cooling output and to prevent the win­
dows from fogging over, the air intake in
front of the windshie ld must be free of ice,
snow or leaves.
- Condensation from the cooling system* can
drip and form a pudd le of water under the
vehicle . This is normal and does not mean
there is a leak.
- Th e energy management system may tem ­
porarily switc h off certain functions, such as
the seat heating* or rear window defogger.
These systems are ava ilable again as soon
as the energy supply has been restored.

Warm and cold
Automatic climate control system
Applies to: ve hicles with a utomat ic climate contro l system
Pressing AUTO button and setting the temperature to 72 °F (22 °C) is recommended.
LL co .... N
" N
Fig. 8 1 Automatic climate control system: controls (example)
The funct ions can be switched on and off by
pressing the buttons or adjusted by turning the
knob. The LED in a button w ill light up when the
f u nction is switched on.
Automatic climate cont rol system
The automat ic climate control system automati­
cally maintains a temperature once it has been
set . In all heat ing mode funct ions except
defrost,
the blower on ly switches to a higher speed once
the eng ine coolant has reached a certain temper­
ature.
AUTO
Switching aut omatic mode or "ec o"
mode * on and off
Automatic mode ma inta ins a constant tempera­
ture ins ide the veh icle. Air tempe rature, airflow
and a ir distribution are controlled a utomatically.
AUTO mode switches off once a b utton in the cli­
mate control system is pressed.
When a utomat ic mode is act ive, pressing the
AUTO b utton briefly activa tes the
" E co" mode*1l.
In "eco" mode *, all sett ings are lowered slight ly
to save fuel. When in
"eco" mode*, Eco is shown
8 1l This fu nct ion is not available in every market and is not N ii'i available for the plug- in hybr id.
in the display. To ex it "Eco" mode*, press the
AUTO button aga in.
A/C
cooling mod e
The cooling mode on ly functions with the blower
turned on. You can turn the cooling system on or
off by pressing the A/C button. The air is not
cooled and humidity is not removed when cooling
mode is switched off. This can cause fog on the
windows . The cooling mode sw itches off auto­
matically when there are cold outside tempera­
tu res.
e / e Temperature
The temperature for the driver's and front pas­
senger's s ide can be adjusted separately with the
dials
(D I@ . Tempera tures between 60 °F
(+16 °() and 84 °F (+28 °() ca n be set. If outside
of this range,
LO or HI w ill appea r in the climate
contro l system display. In both settings, the cli­
mate contro l runs constant ly at the maxim um
cooling or heating level. The temperature is not
regulated.
S ynchr oniza tion : by pressing the AU TO butto n
for two seconds, the temperature setting for the
..,.
69

Warm and cold
driver 's side is transferred to the front passeng ­
er's side. This applies a temperature change to
the front passenger 's side .
8/r Blower
Using the regu lator 8f?, you ca n manually adjust
the vo lume of a ir generated by the blower to your
p reference . The blowe r shou ld always run at a
low setting to prevent the windows from fogging
and to ensure a continuous exchange of air inside
t he vehicle . To h ave the blower regu lated au to­
mat ically , press the AUTO button.
~/ :01 ~ Air distribution
The air distribution can adjusted with t he but ­
tons. To have the air distribution regulated auto­ matica lly, press the AU TO button.
The round air vents in t he cockpit are adjustable
q page 71 .
To keep the front s ide windows from fogging up
in damp weathe r, we recommend opening the
side air vents and tilting them to the side .
Foot vents are located under the front seats and
adjustab le vents o n the end of t he center console
t o heat the re ar of the vehicle .
3fx Defrosting
The windshield and s ide windows are defrosted
or cleared of condensation as qu ickly as possible .
The max imum amo unt of air flows ma inly from
the vents below the w indshield. Recircu lation
mode switches off. The temper ature s hou ld be
set at +72°F (22°() or higher. The temperat ure is
controlled automatica lly. In the
;Ix setting, the
A/C cooling mode switches on a utomatically , de­
pending on the outside air temperature.
The A UTO button switches the defroster off.
~ Recirculation mode
The recircu lation mode can be turned on manua l­
ly or automat ica lly*.
- Swi tc h ing man ua l rec irculat ion mode on and
off: press
t h e ~ button .
70
-Automatic * reci rcu lat ion mode : auto recircula ­
tion needs to be activated in the Infotainment
system. Se lect in the Infotainment system:
I MENU I button > Veh icle > left control button >
Air cond itioning > Aut o recircul ation
The air
quality sensor that is designed for d iesel and
gasoline exhaust automatically sw itches the re­
circulation mode on or off depending on the level of pollutants in the o utside air.
In rec irculat ion mode, the air inside the vehicle is
c ir culated and filte red . T his prevents the unfil­
te red air outs ide t he ve hicle from enteri ng the
vehicle inte rior. Switching rec irculat io n mode on
whe n driving throug h a tu nnel o r whe n sitting in
traffic is recommended
q & .
Pressing the~ button, A UTO o r the ;Ix button
switches recirculation mode off .
T he system switches to recirculation mode when
driv ing in reverse when the engine is cold .
SP. Rear window defogger
If the rear window defogger is act ivated when
the ignit ion is swi tched on, the battery manage­
ment determines based on the battery charge if
i t is possible to turn on . Otherwise, the rear w in ­
dow defogger funct ions w it h the eng ine runni ng
and switches off automat ically after approxi­
mately 1 0 - 20 m inutes, depending on the out­
s ide temperat ure.
To p reve nt the rear window defogger from
switching off automat ica lly, press and hold the
!fP. button for more tha n two seconds. This re ­
mai ns sto red up to approxim ate ly lS m in utes af ­
te r turning off the ignition.
J Seat heating*
P ressing the J button switches the seat heat ing
o n at t he hi ghest sett ing (level 3) . The L EDs ind i­
c a te the temperat ure level. To reduce the tem ­
per atu re , press t he button again . T o swi tc h t he
seat heating off, press the bu tton repeatedly un­
ti l the LED turns off .
After approximate ly 10 m inu tes, the sea t heat ing
a utomat ic all y switches from leve l 3 to leve l 2.
..,_

Drivin g
Driving
General information
Breaking in
A new vehicle must be broken in for the first 1,000 mi les (1,500 km). Do not dr ive at speeds
t hat will exceed 2/3 of the max imum pe rm itted
engine speed (RPM) for the first 600 miles
(1,000 km), and avoid fu ll acceleration during
this period . You may gradually start increasing
the RPM and the speed between 600 miles (1,000 km) and 1,000 miles (1,500 km) .
During the first hours of use, the engine has a
higher internal friction than later on when all
moving parts have settled into place with each
other.
How the vehicle is driven d uring the first 1,000
miles (1 ,500 km) a lso affects the engine quality .
Drive at moderate engine speeds after the initial
break-in per iod, part icu larly when running a cold
eng ine . Th is will reduce eng ine wear and improve
the m ileage .
Do not drive at too
low of an engine speed (RPM).
Shift down if the engine stops running "smooth­ ly". Extremely high eng ine speeds are automati­
cally reduced .
Reducing the risk of vehicle damage
@ Note
When driving on poo r roads, by cu rbs and on
s teep ramps, make su re t hat low-hang ing
compone nts such as the spo ile r and exha ust
system do not come into contact with these
or they could be damaged. This especially ap ­
plies to vehicles with low ground clearance
and veh icles that are heavily loaded.
Warming up/cooling down
Applies to: RS models
By warming up/cooling down the engine carefu l­
ly, you can help reduce unnecessary stra in o n
your veh icle when driving in a sporty sty le .
72
The tires only reach t heir full road ho ld ing capa ­
bility once they have warmed up under load.
Yo ur vehicle also has an afte r-run cooli ng fea ­
tu re . Howeve r, cooling down is st ill import ant.
The eng ine and t he brakes as we ll as the exhaust
system and the transmission become very hot
when driving in a sporty style. Before you shut
the veh icle off, you should cool down the vehicle
by driving a few miles at low speeds with light ac­
ce leration .
Driving through water on roads
Note the following to reduce the risk of veh icle
damage when dr iving throug h wate r, fo r example
o n flooded roads:
-The water must not be any higher than the bot ­
tom of the vehicle body .
-Do not drive faster than walk ing speed .
A WARNING
After driving thro ugh water or m ud, the effec­
tiveness of t he b rakes may be reduced due to
mo istu re o n the bra ke rotors and brake pads.
A few ca reful br ake app lica tions sho uld d ry
off the bra kes and restore the fu ll b raking ef ­
fect.
@ Note
-Vehicle components such as the e ng ine,
t ra nsmiss ion, sus pens io n or elect rical sys ­
tem can be severely damaged by d riving
throug h water.
-Alw ays sw itch the S tart/Stop system* o ff
when driving thro ugh wa ter
r=;, page 79.
(j) Tips
-De ter mine the dep th before dr iving throug h
w ate r.
-Do not stop the vehi cle, d rive in reverse or
switch t he e ngine off whe n driving through
water .
-Keep in mind that o ncom ing vehicles may
c re ate w aves th at r aise the wa ter level and
make i t too deep for yo ur vehicle to drive
throug h safe ly.

e-tron
For additional information, see ¢ page 17, Trip
computer (Audi virtual cockpit).
~ Applies to: vehicles with analog instrument
cluster: Open the
Tachometer display by turn­
ing the left thumbwheel on the multifunction
steering wheel.
When opening the driver's door, the charge level is shown in the instrument cluster when the igni­
tion is switched on, or the charge level and the
remaining charge time for the high -voltage bat ­
tery is displayed when charging .
The power meter gives feedback about the partic­ ular accelerator pedal position and shows the
current demand
(%) for electricity or fuel regard­
less of which engine is active.
An economical driving and recuperation range is
shown in green
¢ page 99, Energy recovery (re­
cuperation) .
A driving range that is not economi­
cal is shown in orange .
(D Vehicle not drive ready (OFF)
@ Recuperation (CHARGE)
@ Vehicle ready to drive (READY) or
coasting
© Efficient driving with electric motor
and/or gasoline engine (EFFICIEN­
CY)
® Economic driving while the electric
motor or gasoline engine is in the
partial power range
@ Driving in full power range
0 100% output
@ BOOST: the electric motor supports
the combustion engine
® High-voltage battery charge level
@ EV mode: active a=,v, standby, a=,v
or currently unavailable. ~v
@ Speed limit for electric driving in EV
mode (80 mph/ 130 km/h)
Indicator lights and messages
Applies to: vehicles with plug -in hybr id drive
Also note the indicator lights in¢ page 20.
The gasoline engine is active when the II'§] indica­
tor light turns on.
96
•• Drive system: system fault! Safely park
vehicle
There is a malfunction in the plug-in hybrid sys­
tem. The brake booster and the power steering
may stop working. Stop the vehicle immediately
or as soon as possible. Park the vehicle in a safe place outdoors that is not near buildings, roof
overhangs, carports or similar structures. Switch
the ignition off. Have the problem corrected by
an authorized Audi dealer or authorized Audi
Service Facility.
•• Electric drive: overheated! Safely stop
vehicle and check coolant
The coolant level is too low or the coolant tem­
perature is too high.
Stop the vehicle in the outdoors as soon as it is
safely possible. Switch the ignition off.
Read the important safety
precautions ¢.& in
Coolant on page 103
and check the coolant level
¢page 102.
If the coolant level is OK, the malfunction may be
caused by the system overheating. Let the vehi­
cle's electric drive system cool down for some
time .
If the message turns off after cooling down and
switching the ignition back on, you can continue
driving. Contact an authorized Audi dealer or au­
thorized Audi Service Facility immediately to have
the malfunction corrected.
If the indicator light stays on, contact an author­
ized Audi dealer or authorized Audi Service Facili­
ty.
lltll Drive system: system fault! Please con­
tact workshop
There is a malfunction in the plug-in hybrid sys­
tem . Drive to an authorized Audi dealer or au­
thorized Audi Service Facility immediately to have
the malfunction corrected.
1/1111 Drive system: system fault! Restart not
possible. Please contact workshop
There is a malfunction in the plug-in hybrid sys­
tem. Do not open the hood. Drive to an author- ized Audi dealer or authorized Audi Service
.,,_