2021 AUDI A8 hood release

4N0012721BF
Quick access

—Park assist plus ............... 198
— Driver assistance systems ...... 153
@_ Depending on equipment:
—Cup holder ..............00.. 95
—SOCkEt: ss seas ¢ 5 cease go eR Fe ee 94
@0) Depending on equipment:
— Starting the engine if there is a


malfunction ................. 108
— Audi music interface .......... 252
—Audi phone box ............... 211
@) Electromechanical parking brake
button 2... 6... cece ee ee eee ee 121
@ Automatic transmission selector
lever... 2... cece eee eee eee ee 109
@ [START ENGINE STOP] button .... 107
@4 Steering wheel adjustment ...... 78
@5) Lever for:
— Cruise control system ......... 163
— Adaptive cruise assist .......... 166
@8 Connection port for the On Board
Diagnostic System (OBD) ........ 333
@) Buttons for:
> LIQHtS sc ss sees ¢ 2 wees 3s ewes G 58
—All-weather lights ............ 58
— Rear fog lights ............... 58
Hood release .............0.00. 276
@9) Button for:
— Luggage compartment lid ...... 48
— Fuel filler door release (plug-in
hybrid drive) ............0.00. 27
60 Exterior mirror adjustment ...... 64
@2 Buttons for:
— Power windows .............. 52
—Child safety lock .............. 51
@) Tips
Some the equipment listed here is only instal-
led in certain models or is available as an op-
tion.
Indicator lights overview
The indicator lights in the instrument cluster
blink or turn on. They indicate functions or mal-
functions. Some warning and indicator lights
turn on when you switch the ignition on and must
turn off when the drive system is switched on or
while driving.
With some indicator lights, messages may ap-
pear and warning signals may sound. The indica-
tor lights and messages may be covered by other
displays. To show them again, select the second
tab for messages with the multifunction steering
wheel & page 13.
Some indicator lights in the display can display in
several colors.
ONC eae sh
If the A or A indicator light turns on, check
the message in the instrument cluster.
The following indicator lights may be available,
depending on the vehicle equipment:

Red indicator lights
Central indicator light
=> page 7,
Instrument cluster
=> page 12
Safety belt
=> page 82

















Engine start system
=> page 108
Transmission
=> page 112
Drive system
=> page 117,
Electrical system
=> page 284
Charging system
=> page 137
Electromechanical parking brake
=> page 121
Electromechanical parking brake
=> page 122

Checking and Filling


Opening and closing the hood
The hood is released from inside the vehicle.



RAZ-0016|


Fig. 180 Unlocked hood: lever
Make sure the wiper arms are not raised up from
the windshield. Otherwise the paint could be
damaged.
Opening the hood
> Applies to: vehicles with plug-in hybrid drive:
Switch the ignition off before releasing the
hood so that the gasoline engine does not start
automatically.
> With the door open, pull the lever <> below
the instrument panel in the direction of the ar-
row > fig. 179.


D_ The & symbol is not available in all countries.
276
>» Raise the hood slightly > page 274.
> Press the lever > fig. 180 in the direction of the
arrow. This releases the hooks.
> Open the hood.
Closing the hood
> Push the hood down until you override the
force of the strut.
> Let the hood fall lightly into the latch. Do not
press it in. > /\.
Messages
B Warning! Hood is not locked. Stop vehicle
and check the lock
The hood latch is not locked correctly. Stop im-
mediately and close the hood.

Z\ WARNING
— Never open the hood when there is steam or
coolant escaping from the engine compart-
ment, because there is a risk that you could
be burned. Wait until no steam or coolant is
escaping.
— For safety reasons, the hood must always be
latched securely while driving. Because of
this, always check the hood after closing it
to make sure it is latched correctly. The hood
is latched if the front corners cannot be lift-
ed.
— If you notice that the hood is not latched
while you are driving, stop immediately and
close it, because driving when the hood is
not latched increases the risk of an accident.

Checking and Filling

@) Note
— 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 G12evo coolant additive is not availa-
ble in an emergency, do not add any other
additive. You could damage the engine. If
this happens, only use distilled water and
restore 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.
— You can continue driving if the permitted
G12evo coolant additive was not added.
However, go to an authorized Audi dealer or
authorized Audi Service Facility immediately
to have the coolant replaced to reduce the
risk of engine damage.
— 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.

RAZ-0540

MIN


Fig. 183 Engine compartment - Coolant expansion tank:
@ cover with release button; @) markings
Observe the safety precautions > page 274, Gen-
eral 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. 181. One expansion tank for the combustion
engine and one tank for the high-voltage system.
The coolant expansion tank for the high-voltage
system is sealed and must not be opened > /\
and> A\.
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. 181 using the outer
markings (2) > fig. 183. 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.
> Conventional drive system: When you add cool-
ant to the expansion tank, please refer to
=> page 281, Cooling system.
>» Plug-in hybrid drive: If you add coolant to the
coolant expansion tank for the combustion en-
gine, 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. Audi recommends mixing
the coolant additive with distilled water.
> Allow the engine to cool.
> Place a large, thick towel on the coolant expan-
sion tank cap.
> Push the release button @ > fig. 183 on the
cap and carefully turn it to the left until you
feel resistance > /\.

4N0012721BF
Checking and Filling

> Push the release button again and remove the
cap completely.
> 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.

der any circumstances > page 277, fig. 181.
If the coolant expansion tank for the high-
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.


ZA WARNING
— The engine compartment in any vehicle is a
potentially dangerous area. Stop the engine,
switch the ignition off, and allow the engine
to cool before working in the engine com-
partment. Always follow the information
found in > page 274, General information.
— 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.
CG) Note
Do not continue driving if the coolant expan-
sion tank is empty. Do not add any coolant,
because air could enter the cooling system
and damage the engine. See an authorized
Audi dealer or authorized Audi Service Facility
for assistance.
Brake fluid

BFV-0229|




ZA WARNING
Applies to: vehicles with plug-in hybrid drive
The coolant expansion tank for the high-volt-
age 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-


Fig. 184 Engine compartment: cap on brake fluid reservoir
Observe the safety precautions > page 274, Gen-
eral 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. 181. The brake fluid lev-
el must be between the MIN and MAX markings
oA.
The brake fluid level is monitored automatically.
Messages
EG 7 @ Brakes: stop vehicle and check brake
fluid level
283
>

Checking and Filling


Always keep children away from battery
acid and the battery. @
@/
oo

Always follow the instructions in the oper-
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:
® ®
@/
oo

Fire, sparks, open flame, and smoking are
forbidden.
Always keep children away from battery
acid and the battery.
Always follow the instructions in the oper-
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.
arging the 12 Volt vehicle battery

Fig. 185 Engine compartment: connectors for a charger or
jump start cables
Observe the safety precautions > page 274, Gen-
eral information, > /\ in Battery general infor-
mation on page 285 and > /\.
Requirement: only use chargers with a maximum
charging current of 14.8 volts. The battery ca-
bles remain connected.
The charging cable connections are located in the
motor compartment. The ground point ©) is al-
ways located on the vehicle body.
> Switch off the ignition and all electrical equip-
ment.
> Open the hood > page 276.
» Press the release lever on the positive terminal
and fold the cover upward > fig. 185.
> Clamp the charger terminal clamps to the jump
start pins according to the instructions. (Hex
head bolt under a cover (), ground point 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. >

4N0012721BF
Index

Online services
refer toconnect.......... cece eee eee 222
Online system update.................. 264
Online traffic information............... 239
OPeniing sc» « swesius © o cwcwew w eeewesens vt euswens we eaewoue 41
Automatic luggage compartment lid...... 49
Convenience opening...............0405. 53
Fuel-fillerdoor's « s sve ¢ « weeoa ¢ 0 wanes ¥ ane 271
HOOd .... cece eee 276
Luggage compartment lid............... 49
Luggage compartment lid with foot motion . 50
Panoramic glass roof..............2000. 53
Rear window sunshade................. 55
Surishaden(root) « scons «a accuse 2 x emma oo ose 53
Sunshade (windows) ..............00005 52
Windows ......... 20. eee eee eee 52
Opening and closing
refer to Unlocking and locking........ 41, 46
Opening the charging port door.......... 134
Operating
Head-up display’: « « seis ie gees + eres + eo 33
Instrumenticluste tienes» « secre a sangse « = snees T3'
Multifunction steering wheel............ 13
Multi Media Interface............... 18,21
Rear Seat Remote..............0005 18, 28
Text input... 6.2... eee eee eee eee 25
Towchdisplay's = 2 sews « s sews & «ee ¢ eee 2 18
Voice recognition system.............-. 34
Operating¢mModes « sein «sows + wae w ¥ wae 114
Optional equipment number............. 343
Options
Medias a scasss i a susaas « o: anmwons 4 nmnuans 4 aseatas 257
Radio... ieee eee 248
Outside noise... eee eee eee eee 116
Overview: (GOCKpit):. « swine o « creme a simone « 0 scene 6
P
PaiMtCOde la . o sccvam aw seauewe & avevane & o voeaun a os 343
Paintdamagess « « wseas 6 www ve sees & o renee 312
PANIC BUGLON': ¢ mess ss wenu s y eens « ¥ ene 5 2 45
PANIG fUNCtION Se: = = sews = ¢ aeupe ¢ o ee 3 eee 45
Panoramic glass roof.......... eee ee eee 53:
Convenience opening and closing......... 53
Emergency closing............-..20-005 54
Quick opening and closing.............. 54
Parental control
DVD... oes 257
Rear Séat REMOtes s acaw 5 « meme ay wens 2 oe 28
Parkassist plUS « scas + < xan 4 e eee eRe 198
Parking... ... cece cece eee e eee 108
Parking aid... . 1.0... eee cece eee eee eee 188
Adjusting the volume................. 190
Automatic activation.................. 189
Cleaning the sensors and camera........ 311
Deactivating rear cross-traffic assist .... . 195
Parkcassist:plusiac ss scoaa «waa a 3 wien ooo 198
Parking aid plus...............02-.00. 188
Parking space search.................. 196
Peripheral
cameras............-0000-- 191
REARVICWHGAIMIEF Alcan x exessene so acenece a 0 eonsere 191
Remote controlled parking............. 202
Switching off maneuver assist.......... 208
Parking and maneuvering.............-- 188
Parking brake
refer to Electromechanical parking brake. 121
Parking heater
refer to Auxiliary climate control........ 104
Parking light Sie 2 o ccs + venues eo rece eo eoeneee 58
Parking lock emergency release.......... 112
Pass=through cscs x ¢ ogee y ees yo ewes so oe 98
Pédalsteius + 2 qeme = © aime < Roe 5 BURN FE HORE 111
Pedestrian detection..............-.00. 159
Perchlorate. ... 2.2.0.0... cece eee eee eee 338
Peripheral cameras............--0000-- 191
Phone
Connecting a second mobile device...... 210
Disconnecting a mobile device.......... 211
SO TEIIGS ssenosw 2 0 cmemeioe « oxsuemen © sitanems a oexints 218
Phonebook
refer to Directory............002--005- 216
PIN
A-digit myAudi PIN...............000488 38
Protection wssine s+ sce ww inne 6 6 anrsass ww anes 39
Playback (media) ..... 0... cess eee eee eee 253
Plug-inmhybrid drive’s « sss x x cages x « emcee a 114
Coolant.......... 00.0. e eee eee 281, 282
Power meter...........0 cece eee eee 15
Plug-in hybrid mode.................0.. 114
Podcast
refer to Online radio.............. 246, 247
Polishing ....... 0... c cece cece 312
353