check engine light AUDI A8 2020 User Guide

4N0012721BD
Checking and Filling


— Drain the oil into a container designed for
this purpose that is large enough to hold the
full amount of oil in your engine.
— Engine oil is poisonous. Always store out of
reach of children.
— Prolonged contact of used engine oil with
the skin may cause skin damage. Always
wash oil off immediately with soap and wa-
ter to protect your skin.

@) Note
Do not mix any additives with the engine oil.
Additives may cause engine damage that is
not covered by your New Vehicle Limited War-
ranty.
@ For the sake of the environment
— Before changing the engine oil, make sure
you can dispose of the used engine oil cor-
rectly.
— Engine oil must always be disposed of cor-
rectly. Do not dump it in the yard, in the for-
est, or in open water, river channels, or sew-
ers.
— Have your used engine oil recycled by bring-
ing it to a used oil collection site or contact
a gas station.
Cooling system
The engine cooling system is filled with a mixture
of purified water and coolant additive at the fac-
tory. This coolant must not be not changed.
The coolant level is monitored using the B indi-
cator light. However, occasionally checking the
coolant level manually is recommended.
Messages
B Turn off engine and check coolant level. See
owner's manual
The coolant level is too low.
Stop driving and switch the engine off. Check the
coolant level > page 282.
— If the coolant level is too low, add coolant
=> page 282. Only continue driving once the in-
dicator light turns off.
|_| Coolant temperature: too high. Please let
engine run while vehicle is stationary
Let the engine run at idle for a few minutes to
cool off, until the indicator 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.
if Coolant system: malfunction! Please turn
off engine
Do not continue driving, shut the engine off, and
switch the ignition off.
— See an authorized Audi dealer or authorized
Audi Service Facility for assistance.
Applies to: vehicles with plug-in hybrid drive
B Electric drive system: malfunction! Cooling
system. Please contact Service
There is a malfunction in the cooling system.
Drive to an authorized Audi dealer or authorized
Audi Service Facility immediately.
Coolant additive
The coolant additive is made of anti-freezing and
corrosion protection agents. Only use the follow-
ing coolant additives. These additives may be
mixed with each other.



Coolant additive Specification
G12evo TL774L
G12++ TL774G
G13 TL774]

The amount of coolant additive that needs to be
mixed with water depends on the climate where
the vehicle will be operated. If the coolant addi-
tive percentage is too low, the coolant can freeze
and damage the engine. >
281

Checking and Filling





Coolant Freeze protec-
additive tion
Warm min. 40% min. -13 °F
regions max. 45% (-25 °C)
Cold min. 50% max. -40 °F
regions max. 55% (-40 °C)

@) Note
— Before winter weather begins, have an au-
thorized Audi dealer or authorized Audi
Service Facility check if the coolant additive
in your vehicle matches the percentage ap-
propriate 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.
— Due to the risk of engine damage, the cool-
ing system should only be refilled by an au-
thorized Audi dealer or authorized Audi
Service Facility. An authorized Audi dealer or
authorized Audi Service Facility can also pro-
vide you with important information about
the recommended coolant additive.
Checking coolant

= % [RAZ-0540]


MIN

Fig. 185 Engine compartment - Coolant expansion tank:
@ cover with release button; @) markings
Follow the safety precautions > page 274, Gener-
al information.
282
Applies to: vehicles with plug-in hybrid drive Your
vehicle has two coolant expansion tanks that are
separate from each other > page 277, fig. 183.
One expansion tank for the combustion engine
and one tank for the high-voltage system. The
coolant expansion tank for the high-voltage sys-
tem is sealed and must not be opened > /\ and
of.
Checking the coolant level
> Park the vehicle on a level surface.
> Switch the ignition off.
> Open the hood > page 276.
> Check the coolant level in the coolant expan-
sion tank > page 277, fig. 183 using the outer
markings (2) > fig. 185. The coolant level must
be between the markings (2) when the engine is
cold. When the engine is warm it can be slight-
ly above the upper marking.
> If you add coolant to the coolant expansion
tank for the combustion engine, see
= page 281, Cooling system.
>» Plug-in hybrid drive: if coolant is missing from
the high-voltage system coolant expansion
tank, do not continue driving. Contact an au-
thorized Audi dealer or authorized Audi Service
Facility immediately > A\.
Adding coolant
Applies to: coolant expansion tank for combustion engine
When adding coolant to the combustion engine
expansion tank, please observe the following in-
structions.
Requirement: there must be a residual amount of
coolant in the expansion tank >@.
If you must add coolant, use a mixture of water
and coolant additive. Mixing the coolant additive
with distilled water is recommended.
> Allow the engine to cool.
> Place a large, thick towel on the coolant expan-
sion tank cap.
> Push the release button @ © fig. 185 on the
cap and carefully turn it to the left until you
feel resistance > /\.
> Push the release button again and remove the
cap completely.

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

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
>

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