heating AUDI A3 SEDAN 2017 User Guide

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next traffic light is red. This produces an engine
braking effect, which helps to protect the brakes
and tires and reduces the emissions and fuel con­
sumption to zero (fuel shut-off during decelera­
tion).
Shift efficiently
An effective way to save fuel is to upshift earlier.
Staying in a gear too long uses fuel unnecessari­
ly .
Press down on the accelerator pedal slowly and
avoid "kick-down".
Avoid full acceleration
You should rarely travel at the maximum vehicle
speed. High speeds cause a disproportionately
high increase in fuel consumption, emissions and
traffic noise. Slower driving saves fuel.
Reduce idling time
The Start/Stop system* helps to reduce the idling
time automatically. In vehicles without the Start/
Stop system, it is efficient to switch the engine
off when stopped
at railroad crossings and long
red lights. Depending on the version of the en­
gine, stopping the engine for as little as five sec­
onds once it has reached operating temperature
still saves more fuel than leaving the engine run­ ning
-even when taking into account the amount
of extra fuel that is used to restart the engine.
It takes a very long time in idle to warm the en­
gine up to operating temperature. Wear and
emissions are especially high in the warm-up
phase. Therefore, you should begin driving im­
mediately after starting the engine. Avoid high
RPMs while doing this.
Have maintenance performed regularly
By having maintenance performed regularly on
your vehicle, you can help to reduce fuel con­
sumption before you even start to drive. The maintenance condition of your vehicle not only
affects traffic safety and long-term value but al­
so impacts
fuel consumption. A poorly main­
tained engine can lead to fuel consumption that
is 10% higher than normal.
Driving
Avoid short trips
The engine and emissions control system must
reach their optimal
operating temperature to ef­
fectively reduce consumption and emissions.
A cold engine uses a disproportionately high
amount of fuel. The engine reaches operating
temperature and consumption normalizes only
after approximately 2.5 miles (4 km).
Check the tire pressure
To save fuel, make sure the tires are always in­
flated to the correct pressure
r=;, page 33 5. The
fuel consumption can increase by S% if the pres­
sure is only 0.5 bar too low. Due to the increased
rolling resistance, low tire pressures will also
lead to greater tire
wear and will affect driving
behavior.
Do not drive on
winter tires year-round, as this
will consume up to 10% more fuel.
Eliminate unnecessary weight
Since every kilogram of extra weight increases
fuel consumption, a quick inspection of the lug­
gage compartment may be worth it to avoid un­
necessary weight.
When not being used, a roof rack should be re­
moved to decrease the wind resistance of the ve­
hicle. You will save approximately 12% of your
fuel when at speeds from 62-75 mph
(100-120 km/h).
Save energy
The engine drives the generator, which generates
electricity; the fuel consumption also increases
with the demand for electricity. Therefore, switch
electrical equipment off when you no longer
need it. Examples of equipment that uses a lot of
energy are air blowers at a high setting, the rear
window defogger and seat heating*.
(D Note
- Do not leave engine idling unattended after
starting. If warning lights should come on
to indicate improper operation, they would go unheeded. Extended idling also produces
heat, which could result in overheating or
IJ,-
75

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The power meter gives feedback about the pa rt ic ­
ular accelerator pedal position and shows the
cur rent demand
(%) fo r electric ity or fuel rega rd ­
less of which engine is active.
An economica l driv ing and recupe ra tion range is
shown i n green
r:!> page 101, Energy recovery (re­
cuperation). A driving range that is not economi­
cal is shown in orange.
CD Ve hicl e no t drive ready (O FF)
@ Recuperation (CHARGE)
® Ve hicl e ready to d rive ( READY) o r
c oastin g
@ Effic ient driving w ith electric moto r
and/or gasoline eng ine (EFFICIEN-
CY)
® Ec onomic driv ing while t he e lectr ic
mot or or g asoline e ng in e is i n th e
p a rt ial power range
® D riving in full power range
0 100 % outp ut
® Boosting -the elect ric motor as-
sists the gasoline engine (BOOST)
® H igh-voltage battery cha rge level
@ EV mo de: a ct ive av , standby, c::§V
or cur rently unavailable. ~v
@ Speed limit for elect ric driv ing in EV
m ode (80 mph/ 130 km/h)
Indicator lights and messages
A pp lies to: ve hicles w ith p lug -in hybr id drive
A lso note the in dica to r li ghts in r:!> page 24.
The gaso line engine is active when the
111 indica­
to r ligh t turns o n.
./. Drive system: system fault! Safely park
vehicle
There is a malfunction in the plug-in hybrid sys ­
tem . T he br ake booster and the powe r steering
may stop wor king. Stop the veh icle immediately
or as soon as possib le . Park the vehicle in a safe
p lace o utdoors that is not near buildi ngs, roof
overhangs, carports o r similar structures . Sw itch
the ig nition off . Have the problem cor rected by
an a uthor ized A udi dealer or au thor ized A udi
S erv ice Facil it y .
98
•• Electric system: overheated. Safely park
vehicle and check coolant
The coolant level is too lo w or the coo lan t tem­
p er at ure is too hig h.
Stop t he vehi cle in the o utdoors as soon as it is
safely possib le. Swi tch t he ig nitio n off.
Read the important safety precautions
r:!> .& in
Coolant on page 105 and check the coolant level
r:!> page 104.
If the coolant level is OK, the malfunction may be
ca used by the system ove rheating . Let the vehi­
cle's e lectr ic dr ive system coo l dow n for so me
t im e.
If the message turns off after coo ling down and
switching the ignition back on, you can continue
driv ing . Co ntac t an author ized Audi dealer or au ­
t h orized Audi Serv ice Facili ty immedia tely to have
t h e malfunct io n co rrecte d.
If the indicato r light stays on , contact an autho r­
i zed Audi dealer or author ized A udi Se rvice Facili­
ty.
11;11 D rive system: system fault! Please con­
tact workshop
There is a ma lf u nction in t he p lug -in hy brid sys ­
tem. D rive to an authorized Aud i deale r or au ­
thorized Aud i Serv ice Facility immediately to have
the malfunct ion co rrected.
11;11 Drive system: system fault! Restart not
possible. Please contact workshop
There is a ma lf u nction in the plug-in hybrid sys ­
tem. Do not ope n the hoo d. Drive to an a uth o r­
i zed Audi dealer or author ized A udi Se rvice Facili ­
ty immediate ly to have the malfuncti on correct­
ed.
11;11 Battery temperature too low. Engine
start not possible . See owner's manual
The o utsid e tem per atur e is too low. The veh icle
can no longer s tart at tem peratures be low -18 °F
(-28 ° C). Contact an author ized A udi dea ler or au ­
thorized Audi Serv ice Facility.
•
POWER LIMIT Warning! Limited power

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., To activate the desired timer, conf irm the set­
ting with the control knob . A./ appears in the
box .
Preferr ed charg ing t ime
You can spec ify a preferred charging time for the
programmed timer, for example if yo u wou ld like
to use the off-peak rate.
., Se lect : IMENUI button> V ehicl e> left cont rol
button >
C ha rge > right contro l button > Pro­
gr am tim er.
Power s ave mode
Powe r save mode is automatically switched o n
when the contro l unit has not been operated for
mo re than one m inute. The
L E D @ ~ page 111,
fig. 121 stays on. All other d isplays turn off.
.. To switch power save mode on or off, press the
~button @ ~page 111, fig. 121 .
Power save mode ends automatically when the
vehicle charging connector is plugged into the ve ­
h icle.
The high-voltage battery is charging when the
LED @ blinks.
(D Tips
-Air condit ioning and heating is powered
electrically if you select climate control us­
i ng the charging timer . This may also be
used in confined spaces such as garages .
-Using the auxiliary air conditioning wh ile
charging can also reduce the charge level of
the high-vo ltage battery.
-The high-voltage battery also charges in
power save mode .
-If the charging process is in progress, it will
not be interrupted when power save mode
switches on.
-The charging process can be interrupted at
any time . Press the active button on the ve­
hicle to do
this ~ page 111, fig. 122.
-The cl imate control output wh ile charging
depends on the capacity of the electrical
connection . Additional information on cl i­
mate control can be found under
~ page 118.
e-tron
Setting the charging power level
Applies to: vehicles with plug -in hybrid drive
The cont rol un it automatically recognizes the
vo ltage and the available current strength. You
can set whethe r you wou ld like to charge w ith the
f ull or half of the charging power .
., Press the I OKI@ ~ page 111, fig. 121 butto n
on the control unit .
., Enter the PIN if necessary.
., PO WER and SET PIN appear in the disp lay
fie ld .
., Select POWER with the a rrow button ©­
., Press the I OK ! button @.
., The charging power disp lay appears. The cur­
rent set value (50% or 100%) is marked with a
frame .
., If necessa ry, change the setting using the ar­
row button © to move downwa rd or upwa rd.
., Press the I OK I button @.
(D Tips
-If a household socket is used for the charg­
ing process, the cha rging power level is au­
t oma tically set to 100%. If m ultip le electri­
cal consumers are connected to a circu it,
the charging power may be limited to 50%
when charging with a household socket in
order to relieve the load on the electrical in­
stallation.
-If an industrial socket is used for the charg­
ing process, the charging power level is au­
tomatically set to 50%. To rece ive the maxi­
mum charging power, the value must be set
to 100% .
-A selected value remains set until the power
cable is connected again .
113

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LED on the control
Symbol Error code
unit@ Meaning
Solution
Disconnect the control
200,210, unit from the power sup-
ply and have the malfunc-
260, 410,
Red On Error in the control unit. tion corrected at an au-450, 460, thorized Audi dea ler or au-
490,500 thorized Audi Service Fa -
ci lity
The control unit is over- Al
low the control un it to
cool down or operate it in
180,190 Red On heating or not cooled
the specified temperature
enough. range.
Have the malfunction cor -
130, 140,
Red On Communication to
the ve- rected by an authorized 470 hid e is malfunctioning. Audi dealer or authorized
Audi Service Facility.
300,310 , Error in the household in-Have the electrical instal-
Red On lation checked by a quali-
370,390 sta llation .
fied electrician.
Have the electrical instal-
480 Red Flashes F
au lt in the household in-
lation up to the control
stallation. unit checked
by a qualified
electrician.
Reset the ground fau lt in-
terrupter with the
IOKI @
Ground fault interrupter
button ~ page 111,
110 Red Flashes (GFI) triggered
in the con-fig. 121. Have the electri-
trol unit.
cal installation checked by
a q ualified electrician if
the same display appears.
Vehicle: charging unit
LED on the vehicle @ Meaning Solution
High-voltage battery cha rging Remove the charger, put the cap
On on and close the cover on the
process is completed.
charging unit.
The high-voltage battery is charg-
Pulsating light ing or the vehicle is being air con-
Green ditioned/heated.
Blinks for approxi- Cha
rging timer was programmed
but the charging process has not
mate ly one minute
started yet. The LED in the button
after leaving the vehi -
@~ page 111, fig. 122 also
cle turns on .
115

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This message appea rs when the charg ing system
is incompatib le . On ly charge using the charging
system that is designed for your vehicle .
1,1 AC charging system: malfunction! Please
c ontact Se rvice
This message appea rs if the re is a ma lf u nction in
t he charg ing system . H ave t he p roblem co rrected
immediate ly by an au thorized Aud i dealer or a u­
thor ized Audi Se rvice Fa cility .
Charging unit cover
emergency release
Applies to: veh icles with plug-in hybrid drive
Fig. 1 26 Fron t of the ve hicle: Cove r em ergen cy release
You can release t he cover using the emerge ncy
release.
• T urn the cover lock to the ho rizontal pos ition.
• Unl ock the ve hicle .
• Open the hoo d¢ page 318, Opening and clos­
ing the hood .
• Carefully pull on the knob @ until there is re­
s istance .
• Turn the cover lock to the vertical position
¢page 112, fig . 123.
• Slide the cover carefu lly to the s ide if necessa­
ry .
Climate control
Description
Applies to: veh icles w ith plug-in hybrid drive
Your vehicle has auxiliary air condit ioning
T he a uxili ary a ir cond it io nin g is activa ted depe nd­
i n g on the outside temperature an d the tempera ­
ture set on the climate contro l unit . You can
im-
118
mediate ly switch the climate control on or of f
¢page 118 as we ll as set a timer ¢ page 119.
Auxiliary climate control
The aux iliary clima te control contro ls the tem­
perature in the vehicle in ter ior ent irely wi th ele c­
t ric power.
It tu rns o n on ly if t he hig h-vo ltage
battery charge level is sufficient and there is
enough fuel in the tank.
(D Tips
-T he tem perature that the climate con trol
system adjusts to depends on the last tem­
perat ure yo u set in the climate contro l unit
¢ page 71 .
-Using the auxiliary air conditioning while
charging can a lso reduce the charge level of
the high -voltage battery.
-T he climate cont rol system does not auto­
matically switc h on or off earlier if the hig h­
voltage battery charge o r fuel leve l is too
low .
Switching on/off
Applies to: vehicles with plug-in hybrid drive
Switching the auxiliary climate control on /
off:
• Select the I MENU I button> Vehicle> left con­
t rol b utton >
Auxiliary air conditioning > Turn
on auxiliary heating / AC or Turn off auxiliary
heating / AC .
(D Tips
-The au xiliary climate con tro l c an also be
switche d on and off immedia tely when a
t imer is se t.
-If th e blower is sw itched off w ith t he~
r::!; page 7 1, fig . 86 butto n, then the auxili ary
air conditioning also switches
off immedi ­
ately .

Ass is tan ce sys tems
speed and the distance between your
vehicle and other vehicles.
- For safety reasons, cruise control should not
be used in the city, in stop-and-go traffic, on
winding roads and when road condit ions are
poor (such as ice, fog, gravel, heavy rain and
hydroplaning), because th is increases the
r isk of an accident.
- Switch the cruise control off temporar ily
when driving in turn ing lanes, h ighway exits
or in construction zones.
- Please note that unconsciously "resting" yo ur foot on the accelerator pedal prevents
the cruise control from braking. This is be­
ca use p ressing the acce le rato r pedal ove r­
rides the c ruise contro l system.
- If a bra ke system ma lf u nction such as over­
heating occu rs when the c ruise contro l sys­
tem is sw itched on, the braking function in
the system may be switched off . The rest of
the cr uise control system f unctions remain
active as long as the
(lj;(i)~i~ (USA models) /
Bl (Canada models) indicator light is on.
(D Note
Before driving downhill a long distance on a
steep hill, decrease your speed and select a
lower gear. Th is makes use of the eng ine
braking effect and relieves the brakes.
@ Tips
The brake lights turn on when the brakes a re
activated.
Changing the speed
A pp lies to: ve hicles w ith c ruise contro l system
.,. To increase or decrease the speed in incre­
ments,
tap the lever in the 0 10 d irection
¢ page 123, fig . 127 .
.,. To inc rease o r decrease the speed quickly, hold
the leve r in the 0 / 0 direct io n until the de­
s ir ed speed is reached.
124
' Overriding the speed
App lies to : vehicles wit h cruise co ntrol system
You can press the acce lera to r pedal to increase
you r speed, fo r example if you want to p ass
someone. The speed you set ear lier will resume
as soon as you release the acce lerator pedal.
However, if yo u are d rivi ng considerably faste r
t h an the s to red speed for a lo ng period of time
time, the cr uise con trol sys tem w ill temporari ly
switch off . The
(lj;(i)~i~ (USA models) !Bl (Canada
models) indicato r light in the instrument cluste r
turns off and the stored speed is maintained.
Preselecting a speed
App lies to : vehicles wi th cruise co ntrol system
You can pre -select your desired speed when the
vehicle is stationary.
.,. Switch the ignit io n on.
.,. Pull the lever into position (D ¢ page 123,
fig. 127 .
.,. To increase or decrease the speed, tap the lever
in the
0 10 direction.
This function makes it possible, for example, to
save the speed you want before d riving on t he
highway. Once on the highway, activate the
cruise contro l system by pu lling the lever toward
the position
(D .
' Switching off
App lies to: vehicles wit h cruise co ntrol system
Deactivating temporarily
.,. Press the brake pedal, or
.,. Press the lever into position @ (not clicked into
place) ¢ page 123, fig . 12 7, or
Switching off completely
.,. Press the lever into position @(clicked into
place), or
.,. Switch the ignit io n off.
The speed you stored will be maintained if the cruise contro l has been switched off temporarily .
To resume the stored speed, release the brake pedal and pull the lever to position
(D . ..,.

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Intelligent Technology Electronic Stabilization
Control (ESC)
Description
Electronic Stabilization Control ( ESC) supports
driver safety . It reduces the risk of slipping and
improves dr iving stability. ESC detects critica l sit­
uations such as the vehicle oversteering and un­
dersteer ing or the wheels are spinning. The vehi­
cle is stabilized by apply ing the brakes or reduc ­
ing engine torque . When the ESC engages, the
G1 indicato r light b links in the instrume nt clus­
ter.
The follow ing systems are integrated in the ESC:
Anti-loc k bra king system (ABS)
ABS prevents the whee ls from locking when brak­
ing. The vehicle can still be steered even during
hard brak ing. Apply steady pressure to the brake
pedal. Do not pump the pedal. A pulsing in the
b rake pedal indicates that the system is act ing to
stabilize the vehicle .
Brake a ssist system
The brake assist system can decrease braking dis­
tance. It increases brak ing power when the driver
presses the brake pedal quick ly in emergency sit­
uations . You must press and hold the brake pedal
u nti l the dangerous sit uat io n is ove r. In veh icles
with adaptive cr uise contro l*, the bra ke assist
s ys tem is more sensitive if t he d istance detec ted
to the veh icle dr iv ing ahe ad is too small.
Anti -slip regulation (ASR)
ASR reduces eng ine power when the drive wheels
begin spinning and adapts the force to the road
conditions . This makes i t eas ie r to sta rt, acceler­
ate and dr ive up hill s.
Electronic differential lock (EDL )
The EDL applies the brakes to a wheel that starts
spinning and transfers t he drive power to the
other driving wheel or wheels ( if the veh icle is
eq uipped w ith all whee l dr ive*) . T his function is
n o t available at higher speeds.
Intellig ent Technology
In extreme cases, ED L automat ica lly switches off
to keep the brake o n the braked whee l from over­
heating. The veh icle is still working correct ly. EDL
will switch on again automatically when condi­
t ions have returned to normal.
Ste ering recommendation
The ESC he lps to s tabilize the vehicle by changing
the steering torque.
Select ive wheel torque control
Se lective wheel to rque cont rol is used w hen driv­
i ng on curves. The fron t whee l on the inside of
the curve or bo th wheels on the i nside of the
c u rve are braked se lective ly as needed . This al­
l ows more precise driving in c urves.
Automatic post-collision braking system
T he "automat ic pos t-collision braking system"
c an help to reduce the risk of sliding an d of addi ­
tiona l co llisions a fter an acciden t. If the ai rbag
contro l modu le detects a co llision above a certain
vehicle speed, the veh icle is bra ked by the ESC.
T he vehicle does not bra ke autorn,;1tically if;
- t he dr ive r presses the acce le rator pedal, or
- the ESC, the brake system or the veh icle elect ri-
cal system are not functioning .
A WARNING
-The ESC and its integ rated systems cannot
overcome the lim its imposed by natura l
phys ic al laws. This is especially important
on sli ppery or wet roads . If the sy stems be­
gin acting to stabilize your vehicle, you
should immediately alter your speed to
match the road and traffic conditions. Do
not let the inc reased safety provided tempt
you into taking risks. This could increase
your r isk of a coll is ion.
- Please n ote the r isk of a coll is ion increases
when dr iv ing fast, especially t hrough curves
a nd on slippery or wet roads, and when dr iv­
ing too close to objects ahead. The ESC and
its integrated systems ca nnot always pre­
vent collisions
-there is st ill a ris k of ac ci-
dents!
..,.
151

Intelligent Technology
and at cold times of the year. A lot of energy is
used but little is generated. It is also critical
when the engine is not running but electrical
equipment is switched on. In this case, energy is
used but none is generated.
In situations like this, energy management will
actively regulate the distribution of energy.
Long periods without use
If you do not drive your vehicle for several days or
weeks, electrical equipment is gradually scaled
back or switched off. This reduces energy use and
ensures the vehicle will be able to start after long
periods of time. Some convenience functions
such as opening with the remote control key may not be available. These convenience functions
will be available again once you switch the igni­ tion on and start the engine.
With the engine switched off
The vehicle battery will drain if you use Infotain­
ment functions such as listening to the radio
while the engine is switched off.
If the vehicle's ability to start may be impaired by
the energy use, a message will appear in the In­
fotainment system display. The message indi­
cates that the system will switch off automatical­ ly soon . If you would like to continue using the
functions, you must start the engine.
With the engine running
Although electrical energy is generated while
driving, the vehicle battery can drain . This can
happen if little energy is generated but much is
used, and the charge level of the vehicle battery
is not optimal.
To restore the balance of energy, components that require large amounts of energy are tempo­rar ily scaled back or switched off. Heating sys ­
tems in part icular require a great deal of energy .
If you notice, for example, that the seat heating*
or rear window defogger is not working, then it
has been temporarily reduced or switched off.
These systems are available again as soon as the
energy supply has been restored .
In addition , you may notice that the idle speed
has slightly increased. That is normal and no
156
cause for concern . By increasing the idling speed,
the additional required energy will be generated
and the vehicle battery will be charged.
Notice about data
recorded by the Event
Data Recorder and
vehicle control modules
Event Data Recorder
This vehicle is equipped with an Event Data Re­
corder (EDR). The main purpose of an EDR is to
record, in certain crash or near crash-like situa­
tions, such as an airbag deployment or hitting a road obstacle, data that will assist in understand­
ing how a vehicle's systems performed . The EDR
is designed to record data related to vehicle dy­
namics and safety systems for a short period of
time, typically 30 seconds or less. The EDR in this
vehicle is designed to record such data as:
- How various systems in your vehicle were oper­
ating;
- Whether or not the driver and passenger safety
belts were buckled/fastened;
- How far (if at all) the driver was depressing the
accelerator and/or brake pedal; and,
- How fast the vehicle was traveling.
These data can help provide a better understand­
ing of the circumstances in which crashes and in­
juries occur. NOTE: EDR data are recorded by your
vehicle only if a non-trivial crash situation occurs;
no data are recorded by the EDR under normal
driving conditions and no personal data (e.g .,
name, gender, age, and crash location) are re­
corded . However, other parties, such as law en­
forcement, could combine the EDR data with the
type of personally identifying data routinely ac­
quired during a crash investigation .
To read data recorded by an EDR, special equip­
ment is required, and access to the vehicle or the
EDR is needed . In addition to the vehicle manu­
facturer, other parties, such as law enforcement,
that have the special equipment, can read the in­
formation if they have access to the vehicle or the EDR.
~

Check ing and F illing
The pull cable for the emergency release is locat­
ed on the cover .
.,. To access t he e mergency release, fold the r ight
bac kres t
forwa rd ¢ page 68 .
.,. Remove the cover from the trim .
.,. Carefully pull the cover toward the center of
the ve hicle at a 45° angle
-arrow- ¢ fig. 268
c>(D . The tab on the cover must point forward
in the direct ion you are pulling when pull ing on
the cover.
.,. Press on the left s ide of the fuel f ille r door to
open it
¢ page 314, fig . 265 .
(D Note
Onl y pull on the loop/cove r unt il you feel re ­
sistance. You wi ll not hea r it re lease . Other­
w ise you cou ld damage t he emergency re­
lease mecha nism .
Catalytic converter
The vehicle may o nly be driven with unleaded
g a soline, otherwise the catalyt ic converter will be
destroyed.
Never d rive until the tank is completely empty .
The irregular supp ly of f uel that results from t hat
can cause engine m isfi res. Uncombusted fuel will
ente r the exhaust sys tem, w hich can ca use ove r­
heating and damage to the catalyt ic converter .
& WARNING
The tem perature of the ex ha ust system is
high, both when driving and after stopping
the engine.
-
- Never touch the exha ust ta il pipes once t hey
have become hot. This could result in burns.
- Do not park your vehicle over flammable
materials such as g rass or leaves because
the h igh temperat ure of the emiss ions con­
trol system cou ld start a f ire.
- Do not apply underbody protectant in the
exhaust system area, because this increases
t h e risk of fire.
316
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 , the re is a risk of in­
jury, scalding, accidents , and burns. For this
reason, follow all the warnings and general
safety precaut ions provided in the following in ·
formation . The engine compartment is a dan­
gerous area.
c> & .
& WARNING
To reduce the ris k of injur ies, comp lete the
following steps before opening the hood:
- Tur n the engine off.
- S witch the igni tion off.
- Set the park ing brake.
- Move the selector lever into t he P position.
- Never ope n the hood when there is steam o r
coo lant escaping from the 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 in 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 t he ignition is switched off, wh ich
increases the r is k of persona l injury.
- Never open the cap on the coolant expan­
sion tank when the engine is warm . The
coo ling syste m is under p ressure.
- To protect your face, hands, and a rms from
hot steam or coolant, cover the cap with a
large cloth when opening .
- Do not remove the engine cover under any
circumstances . Th is i ncreases the risk of
burns .
-

Checking and Filling
When the engine is warm it can be slightly above the upper marking.
Adding coolant
Plug-in hybrid drive* : Your vehicle has two cool­
ant expansion tanks that are separate from each
other. The smaller of the two expansion tanks
must not be opened
¢ page 104. Read and fol­
low the important safety precautions ¢
A in
Coolant on page 105 .
Requirement: there must be a residual amount of
coolant in the expansion tank
¢ (D .
~ Let the engine cool down.
~ Place a cloth over the coolant expansion tank
cap and unscrew the cap counterclockwise
¢_&. .
~ Add coolant mixed in the correct ratio
¢page 323 up to the upper marking.
~ Make sure that the fluid level remains stable.
Add more coolant if necessary.
~ Close the cap securely.
Coolant loss usually indicates there is a leak . Im­
mediately drive your vehicle to an authorized
Audi dealer or authorized Audi Service Facility
and have the cooling system inspected.
If the
cooling system is not leaking, a loss can come
from the coolant boiling through overheating
and being pushed out of the cooling system.
.,&. WARNING
The cooling system is pressurized and can be­
come very hot. To reduce the risk of burns
from hot coolant:
- Do not open the coolant expansion tank cap
when the engine is hot. This increases the
risk of burns.
- Stop the engine and allow it to cool.
- Protect your face, hands and arms from es-
caping coolant and steam by covering the
coolant tank cap with a large, thick cloth.
- Turn the coolant tank cap counterclockwise
slowly and keep light pressure on the cap.
- To reduce the risk of burns, do not allow any
antifreeze or coolant to drip onto the ex­
haust system or hot engine components.
324
The ethylene glycol in engine coolant can
catch fire under certain circumstances.
- The coolant additive and the coolant can be
dangerous to your health. For this reason,
keep the coolant in the original container
and away from children . There is a risk of
poisoning.
- When working in the engine compartment,
remember that the radiator fan can switch
on even if the ignition is switched off, which
increases the risk of injury.
(D 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
continue driving . See an authorized Audi deal­
er or authorized Audi Service Facility for assis­
tance.
- Before the start of winter, have an author­
ized Audi dealer or authorized Audi Service
Facility check if the coolant additive in your
vehicle matches the percentage appropriate
for the climate. This is especially important
when driving in colder climates.
- If the appropriate coolant additive is not
available in an emergency, do not add any
other additive. You could damage the en­
gine. If this happens, only use water and re­
store the correct mixture ratio with the
specified coolant additive as soon as possi­
ble .
- Only refill with new coolant.
- Radiator sealant must not be mixed with the coolant.
· Radiator fan
The radiator fan switches on automatically by it­
self
An auxiliary electric radiator fan switches on and
off depending on coolant temperature and other
vehicle operating conditions.
After you switch the engine off, the auxiliary fan
can continue running for up to 10 minutes
-even
with the ignition off.
It can even switch on again
later by
itself ¢.& , if .,..