check engine AUDI A8 2020 Owner's Manual

4N0012721BD
Checking and Filling

> Add coolant mixed in the correct ratio
=> page 281 up to the MAX marking.
> Make sure that the fluid level remains stable.
Add more coolant if necessary.
> Turn the cap to the right to tighten it until you
feel resistance a second time.
Coolant loss usually indicates that there is a leak.
Immediately 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, coolant loss can re-
sult from the coolant boiling due overheating
and then being forced out of the cooling system.

voltage system is not sealed, please contact
an authorized Audi dealer or authorized
Audi Service Facility.
— When adding coolant, it may leak into the
inside of high-voltage components and
cause a short circuit, increasing the risk of


fire.


Z\ WARNING
— The engine compartment in any vehicle can
be a dangerous area. Stop the engine and al-
low it to cool before working in the engine
compartment. Always follow the informa-
tion found in > page 274, General informa-
tion.
— Never open the hood if you can see or hear
steam or coolant escaping from the engine
compartment. This increases the risk of
burns. The cooling system is under pressure.
When you no longer see or hear steam or
coolant escaping, you may open the engine
compartment with caution.
— 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.
— Coolant additive and coolant can be danger-
ous to your health. For this reason, store the
coolant in the original container and away
from children. There is a risk of poisoning.
() 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.
Brake fluid

BFV-0229|




ZA WARNING
Applies to: vehicles with plug-in hybrid drive
— The coolant expansion tank for the high-
voltage system may only be opened or filled
by an authorized Audi dealer or authorized
Audi Service Facility.
— The coolant expansion tank cap is equipped
with a seal that must never be removed un-
der any circumstances > page 277, fig. 183.
If the coolant expansion tank for the high-


Fig. 186 Engine compartment: cap on brake fluid reservoir
Follow the safety precautions > page 274, Gener-
al information.
Checking the brake fluid level
> Slide the cover that is located below the wind-
shield wipers on the driver's side toward the
windshield and remove the cover.
> Read the brake fluid level on the brake fluid res-
ervoir > page 277, fig. 183. The brake fluid lev-
el must be between the MIN and MAX markings
oA.
The brake fluid level is monitored automatically.
Message
GG / @ Brakes: stop vehicle and check brake
fluid level >
283

4N0012721BD
Checking and Filling

Multiple batteries with different technologies
may be installed in your vehicle:
— Vehicle battery (for example, for starting the
engine, basic power supply) > page 285, 12
Volt vehicle battery or > page 286, Other bat-
tery types
— Auxiliary battery (for example, for recuperation
or optional equipment) > page 286, Other bat-
tery types
— Applies to: Plug-in hybrid drive: High-voltage
battery (for example, for electric driving)
= page 136, Introduction.
Not running the vehicle for long periods of
time
The battery will gradually drain if the vehicle
does not run for long periods of time. To ensure
that the vehicle can still be started, the electrical
equipment will be limited or switched off. Some
convenience functions, such as interior lighting
or power seat adjustment, may not be available
under certain circumstances. The convenience
functions will be available again when you start
the
engine.
Even when electrical equipment is switched off,
the equipment can still drain the battery if the
vehicle is not driven for Long periods of time.
Deep draining results in a chemical reaction that
destroys the inside of the battery. The battery
must be charged every month to prevent this
= page 286. Contact an authorized Audi dealer or
authorized Audi Service Facility for more infor-
mation.
Winter operation
Cold weather places an especially high load on
the 12 Volt vehicle battery. Have the battery
checked by an authorized Audi dealer or author-
ized Audi Service Facility before cold weather be-
gins.

authorized Audi dealer or authorized Audi
Service Facility.
— Never connect a charging cable or jump
start cable directly to the 12 Volt vehicle
battery. Only use the connections in the en-
gine compartment > page 286.


Z\ WARNING
California Proposition 65 Warning:
— Battery posts, terminals and related acces-
sories contain lead and lead compounds,
chemicals known to the State of California
to cause cancer and reproductive harms.
Wash hands after handling.

@) Note
— If the vehicle will be parked for long periods
of time, protect the battery against the cold
so that it will not be destroyed by “freezing”
=> page 286, Charging the 12 Volt vehicle
battery.
— There are electrical components under the
cargo floor behind a trim panel that warm
up during operation. To reduce the risk of
the components overheating, do not store
objects such as blankets under the cargo
floor. If the components overheat, they will
switch off temporarily. This will be indicated
by a message that will be displayed in the
instrument cluster until the temperature re-
turns to normal.
PAO A Ula wer Lasley,
Explanation of warnings:
Always wear eye protection.



ZA\ WARNING
— All work on the battery or electrical system
in your vehicle can result in injuries, chemi-
cal burns, accidents, or burns. Because of
this, all work must be performed only by an

Fire, sparks, open flame, and smoking are
forbidden.


Battery acid is highly corrosive. Always
wear protective gloves and eye protection.
A highly explosive mixture of gases can
form when charging batteries. >


285

Checking and Filling


Always keep children away from battery
@) acid and the battery.

@/ | Always follow the instructions in the oper-
fQ | ating manual.

@ For the sake of the environment
2 ¥ Lead-acid batteries must be disposed of
using methods that will not harm the environ-
ment. Do not dispose of them in household
trash. They contain harmful substances, such
as sulfuric acid and lead, and also recyclable
raw materials. Contact an authorized Audi
dealer or authorized Audi Service Facility for
more information.
Other battery types
Explanation of warnings:

Fire, sparks, open flame, and smoking are
® forbidden.

Always keep children away from battery
3) acid and the battery.

@/ | Always follow the instructions in the oper-
fQ | ating manual.


ZA WARNING
All work on the batteries must only be per-
formed by an authorized Audi dealer or au-
thorized Audi Service Facility.
— Gases that escape from these different bat-
tery types can be poisonous or flammable.
— The contents of these battery types can be
corrosive. If any battery contents come into
contact with the skin, flush the affected
area for at least 15 minutes with clean wa-
ter. Then wash the affected area with soap.
Have the affected area examined by a medi-

cal professional.

() Note
Components must not be connected to the
battery terminals and wires on these battery
types because this increases the risk of dam-
age, for example due to overvoltage.
286
@) For the sake of the environment

OE These types of batteries must be dis-
posed of using methods that will not harm
the environment. Do not dispose of them in
household trash. They contain harmful sub-
stances and recyclable raw materials. Contact
an authorized Audi dealer or authorized Audi
Service Facility for more information.
Charging the 12 Volt vehicle battery

Fig. 187 Engine compartment: connectors for a charger or
jump start cables
Note the safety precautions > page 274, General
information, > /\ in Battery general informa-
tion on page 285 and > /\.
Requirement: only use chargers with a maximum
charging current of 14.8 volts. The battery ca-
bles remain connected.
> Switch off the ignition and all electrical equip-
ment.
> Open the hood > page 276.
> Open the cover on the positive terminal
> fig. 187.
> Clamp the charger terminal clamps to the jump
start pins according to the instructions. (Hex
head bolt under a cover (), hex head bolt on
the vehicle body ©).
> Insert the power cable for the charging device
into the socket and switch the device on.
> At the end of the charging process, switch the
charger off and pull the power cable out of the
socket.
> Remove the charging device terminal clamps.
> Close the cover on the positive terminal.
> Close the hood > page 276.

4N0012721BD
Checking and Filling


AN WARNING
— Never connect a charging cable or jump
start cable directly to the 12 Volt vehicle
battery. Only use the connections in the en-
gine compartment > page 286.
— A highly explosive mixture of gases can form
when charging batteries. Only charge the
battery in well-ventilated areas.
— A drained battery can freeze at tempera-
tures around 32 °F (0 °C). Do not charge or
use a frozen or thawed battery. If ice forms,
the battery housing can crack and battery
electrolyte can leak out, which increases the
risk of an explosion and chemical burns.
Contact an authorized Audi dealer or author-
ized Audi Service Facility for more informa-
tion.
— Do not connect or disconnect the charging
cable while charging because this increases
the risk of an explosion.


@) Tips
Read all of the manufacturer's instructions
for the charger before charging the battery.
Windshield washer
system

B4M-0135,

Fig. 188 Engine compartment: washer fluid reservoir cap
Follow the safety precautions > page 274, Gener-
al information.
The windshield washer reservoir > contains the
cleaning solution for the windshield and the
headlight washer system > fig. 188, > page 277.
The reservoir capacity can be found in
=> page 342.
To reduce the risk of lime scale deposits on the
spray nozzles, use clean water with low amounts
of calcium. Always add window cleaner to the wa-
ter. When the outside temperatures are cold, an
anti-freezing agent should be added to the water
so that it does not freeze.
Message
gS Please add washer fluid
Fill the washer fluid for the windshield washer
system and the headlight washer system* when
the ignition is switched off.
() Note
—The concentration of anti-freezing agent
must be adjusted to the vehicle operating
conditions and the climate. A concentration
that is too high can lead to vehicle damage.
— Never add radiator anti-freeze or other addi-
tives to the washer fluid.
— Do not use a glass cleaner that contains
paint solvents, because this could damage
the paint.
Service interval display
The service interval display detects when your ve-
hicle is due for service.
The service interval display works in two stages:
— Inspection or oil change reminder: after driv-
ing a certain distance, a message appears in the
instrument cluster display each time the igni-
tion is switched on or off. The remaining dis-
tance or time is displayed briefly.
— Inspection or oil change due: if your vehicle
has reached an inspection or oil change interval
or both intervals at the same time, the mes-
sage Inspection due! or Oil change due! or Oil
change and inspection due! appears briefly af-
ter switching the ignition on or off.
Checking service intervals
You can check the remaining distance or time un-
til the next oil change or next inspection in the
Infotainment system.
Applies to: MMI: Select on the home screen: VE-
HICLE > Settings & Service > Service intervals.
287
>

Checking and Filling

Applies to: Audi tablet: Select on the home
screen: VEHICLE > Service intervals.
Resetting the indicator
An authorized Audi dealer or authorized Audi
Service Facility will reset the service interval dis-
play after performing service.
If you have changed the oil yourself, you must re-
set the oil change interval.
Applies to: MMI: To reset the display, select on
the home screen: VEHICLE > Settings & Service
> Service intervals.
@) Note
— Only reset the oil change indicator if the oil
was changed.
— Following the service intervals is critical to
maintaining the service life and value of
your vehicle, especially the engine. Even if
the mileage on the vehicle is low, do not ex-
ceed the time for the next service.
288

Emergency assistance

To benefit fully from the advantages of the uni-
directional tire design, you should replace faulty
tires as soon as possible and restore the correct
running direction on all of the tires.
> Reinstall the caps on the wheel bolts if necessa-
ry.
> Store the vehicle tool kit in its designated
place.
> If the removed wheel does not fit in the spare
wheel well, store it securely in the luggage
compartment > page 100.
> Check the tire pressure on the installed wheel
as soon as possible.
> Correct the tire pressure and store it in the MMI
=> page 308.
> The wheel bolt tightening specification must be
90 ft lbs (120 Nm). Have it checked as soon as
possible with a torque wrench. Drive carefully
until then.
> Have the faulty wheel replaced as quickly as
possible.
Space-saving spare tire
Applies to: vehicles with space-saving spare tire (compact
spare tire)
The spare tire is intended for short-term use only.
Have the damaged tire checked and replaced if
necessary by an authorized Audi dealer or author-
ized Audi Service Facility as soon as possible.
There are some restrictions on the use of the
compact spare tire. The compact spare tire has
been designed specifically for your type of vehi-
cle. Do not replace it with the spare tire from an-
other type of vehicle.
The compact spare tire is located in the luggage
compartment under the cargo floor cover
> page 316.
The tire pressure must be 61 PSI (420 kPA).
Snow chains
For technical reasons, the use of snow chains on
the compact spare tire is not permitted.
322
If you have to drive with snow chains and a front
tire fails, mount the spare tire in place of a rear
tire. Install the snow chains on the rear tire that
you removed, and install that in place of the
front tire that failed.

ZA\ WARNING
— After installing a spare tire, the tire pressure
must be checked as soon as possible.
— Do not drive faster than 50 mph (80 km/h)
with a compact spare tire. Driving faster
than that increases the risk of an accident.
— To reduce the risk of an accident, avoid hard
acceleration or braking and driving fast
around curves with the compact spare tire.
— To reduce the risk of an accident, never drive
with more than one compact spare tire.
— Normal summer or winter tires must not be
mounted on the compact spare wheel rim.

Jump starting
You should only perform the steps that follow if
you have the necessary tools and technical ex-
pertise.
If the engine does not start because the vehicle
battery is drained, you can jump start your vehi-
cle using another vehicle. Jump start cables are
needed to do this.
Both vehicle batteries must have 12 V nominal
voltage. The voltage capacity (Ah) of the vehicle
battery that is giving power must not be less
than the capacity of the drained vehicle battery.
Jump start cable
Only use a jump start cable with a large enough
diameter. Note the manufacturer's specifica-
tions.
Only use a jump start cable with insulated termi-
nal clamps.
Positive cable - usually red.
Negative cable - usually black.

4N0012721BD
Emergency assistance



ZA\ WARNING
— A drained battery can freeze at tempera-
tures around 32 °F (0 °C). If the vehicle bat-
tery is frozen, it must be thawed before con-
necting the jump start cables. If it is not,
the risk of an explosion and chemical burns
increases. After jump starting the vehicle,
drive to an authorized Audi dealer or author-
ized Audi Service Facility immediately to
have the vehicle battery checked.
— Read the warnings when working in the en-
gine compartment > page 274.
— Handling the jump start cables incorrectly
may cause the vehicle battery to explode
and lead to serious injuries.

() Note
— Jump start cables can cause considerable
damage to the vehicle electrical system if
they are connected incorrectly.
— Plug-in hybrid drive: You must not give a
jump start with your vehicle. This could
cause significant damage to the electrical
system in your vehicle.
G) Tips
— There must be no contact between the
vehicles, or else voltage could flow when
connecting the positive terminal and drain
the vehicle battery of the vehicle providing
the jump start.
— The drained vehicle battery must be con-
nected correctly to the electrical system.
— Switch off electrical equipment that is not
needed.
aoe aalale]
Both jump start cables must be connected in the
correct order.

Fig. 205 Engine compartment: connectors for jump start
cables or a charger



Fig. 206 Connecting the jump start cables
The jump start cable connections are located in
the engine compartment.
Follow the information about the vehicle battery
=> page 284.
Connecting the positive cable (red) to the
positive terminal
> Open the red cover on the positive terminal
> fig. 205.
1. Attach one end of the positive cable (red) to
the jump-start pin @ 9° fig. 206 on your vehi-
cle.
2. Attach the other end of the positive cable
(red) to the positive terminal @) on the pow-
er source.
Connecting the negative cable (black) to the
negative terminal
3. Attach one end of the negative cable (black)
to the negative terminal @) on the power
source. >
323

Fuses and bulbs


This can cause damage to the electrical sys-
tem and increases the risk of fire.
(G) Note
If a new fuse burns out again shortly after you
have installed it, have the electrical system
checked as soon as possible by an authorized
Audi dealer or authorized Audi Service Facili-


- The following table does not list fuse loca-
tions that are not used.
— Some of the equipment listed in the follow-
ing tables applies only to certain model ver-
sions or certain optional equipment.
Fuse assignment - left side of cockpit


Fig. 211 Left side of the cockpit: fuse panel with plastic
clip

Fuse panel (2) (black)
No. | Equipment


Climate control system, interior air sensor

N Phone, roof antenna

Climate control system, fragrance system,
particulate matter sensor

Head-up display

Audi music interface, USB sockets

Steering column lock
Front MMI display
Instrument cluster


Ol/aOIN/uys

10 | Volume control

11 | Light switch, switch panels


12 | Steering column electronics

328
Fuse panel (@ (black)

14 MMI Infotainment system control module

15 Steering column adjustment

16

Steering wheel heating

Fuse assignment - left footwell

lo} | He
ia i, L



. | Equipment

Engine ignition coils

Engine start

Electric motor coupling

Windshield wiper control module

Left headlight electronics

Climate control system blower

Instrument panel

Windshield wipers

OND)
OMA)
WININI]
eR
Panoramic glass roof

Fuse panel (2) (black)
No. Equipment

Engine mount


Left rear door control module

4N0012721BD

Child:safety:seats © wc cs cnc so wane ov emcee 91
Securing to the top tether anchor........ 95
Securing with a safety belt.............. 94
Securing with LATCH...............0--5 93
GIGANING was: «2 wesc a 2 wee 2 2 er ee oe a 2 309
Cleaning Alcantara............2-.00000- 312
Cleaning artificial leather............... 312
Cleaning carbon components........ 311,313
Cleaning controls..............00 ee eee 312
Cleaning decorative parts/trim........... 311
Cleaning exhaust tail pipes.............. 311
Cleaning:plastio parts: 5 2 sacs + ssn « 4 sex 312
Cleaming:textiles cision a x saves x a noms v x onan 312
Climate control system..............0.. 104
Climate control system controls in the rear
Childisafety lO¢Kiisne » + iscsi © © snemoss a o ammuaue w 4 53
Closing
Automatic luggage compartment lid...... 51
Convenience closing...........eeeeeaee 54
HOO « wissen oo scawiee a vane v4 ames ao oie a a 276
Luggage compartment lid............... 50
Luggage compartment lid with foot motion . 52
Panoramic glass roof...............204. 55
Rear window sunshade..............005 56
Sunshade (roof) ................00.0005 55
Sunshade (windows) .............0.0005 54
WENGOWS « ssncsie = s cosmsne % « cosmins o coanees wo a seme 54
Closing aid (power closing doors).......... 43
COASTING sam s wen «ore ao wee ae re a 118
Cockpit diMMING « « sss + ¢ wows se ces +e oes 65
Cockpit (OVERVIEW) « = aims se swag s pase a x res 6
GOlGFNUMBEr: ¢ sess sy poem 5 eae 5 e eRR « 341
Combustion engine.................005 118
Combustion engine startup.............. 116
Comfort auxiliary air conditioning......... 109
Comfort entry...... 0.00... eee eee eee ee 129
Coming home/Leaving home
refer to Entry/exit lighting.............. 63
Compact spare tire................0.00. 322
COMPAFEMENESS « sccwn « 0 wince 2 6 eeewene @ 0 ommete 98
Compass inthe mirror............-....-- 70
Compliance. « seve ss wesw sv exces 2 ora ¥ os 339
Configuration wizard.................00. 20
CONNMEGts ¢ 2 wwe x y meme 2 eRe ty eee Re 216
Data plans: « win os wesc vo cman o mane oe 221
Data Privacy. ...... eee eee eee eee eee 334
Emergency/calll «sci © wens e ¥ een 2 3 esecoee 223
Infotainment.......... 0. cece eee eee 216
Infotainment’services. . ci. . evew a ee 217
Online roadside assistance............. 224
Vehicle control services................ 218
Connected devices
Device overvieW.........-..02- 00s eee 268
Connections
fefer to Médidies: = s sews s ¢ news + eee 250, 255
Consumer information.................. 336
Consumption
Reducing « « cas « wows « + wees o x pew so me 121
Consumption (fuel) ........ 2... e eee ee eee 16
Contacts
‘Add destinations « sscis a sass 6 & avian « & a0 235
Importing and exporting.............. 211
MGITIONY: CAPaCity cu s & saces 2 & nas 4 £ Sana 211
Opening (business card)............... 205
Updating inthe MMI.................. 211
Convenience key’: «sini ee eye ev ere as owe 43
Convenience closing.................-. 54
also refer to Vehicle key.............00. 47
Convenience opening and closing
SSUNSHAPE secre «a wine a & siemens Windows or panoramic glass roof........ 54
Coolant temperature display.............. 14
Cooling MOC iis. ce ssw ee eevee ov eevee oo oe 105
Cooling system
AddING
COOLANT: cies a + essing © 1 erecnse nw nome 282
Checking the coolant level............. 282
GOGLANE evccs 2 owe ov samen 2 o ome 7 o eR 281
Cornering light <. « «ees : s sews se eee se es 60
Cross traffic assist (intersection assistant) .. 189
Cruise control system..........-...00-5 166
Cup holders......... 0... cece eee eee 98
Current consumption.................005 16
Curve tilting function..............0000. 129
D
Data plans cosces x « smones x 5 sweets a 6 ononens © ot ones 221
Data: PrivaGy’. 2 sien a sree x x vessieie 6 3 oooueue ¥ 6 334
DAtG cence. is comsas 2 2 rocuow vo nae + 8 Bee = RR 16
SOLE Gh + sucseie « senna ou snenene # 6 ecewse oo) asus 266
Daytime running lights.................. 60
Declaration of compliance............... 339
DEF (instrument cluster)...............0. 12