2021 AUDI A8 auxiliary battery

Warm and cold

Steering wheel heating
Switching on and off
Applies to: vehicles with steering wheel heating
> Press @ to switch steering wheel heating on or
off.
You can also operate the steering wheel heating
using the multifunction steering wheel
=> page 37.
Messages
Applies to: vehicles with steering wheel heating
@ Steering wheel heating: on / Steering wheel
heating: off
This message appears if you have switched the
steering wheel heating on or off.
Steering wheel heating: malfunction! See own-
er's manual
If this message appears, there is a malfunction.
Drive immediately to an authorized Audi dealer
or authorized Audi Service Facility to have the
malfunction repaired.
Auxiliary climate control
Applies to: vehicles with auxiliary climate control
The auxiliary climate control system warms or
cools the vehicle interior. The vehicle will turn on
the auxiliary climate control system if needed,
depending on the last temperature that was set
with the climate control system controls. This
function can be used when the drive system is
switched off.
You can turn the auxiliary climate control system
on and off immediately in the MMI or set a timer.
Requirement: the charge level of the high-volt-
age battery must be sufficient.
G) Tips
— Using the auxiliary climate control while
charging can also reduce the charge level of
the high-voltage battery.
104
— Starting or stopping the vehicle will not
switch off the auxiliary climate control auto-
matically.
Applies to: vehicles with auxiliary climate control
Applies to: MMI: Select on the home screen: VE-
HICLE > Air conditioning > f.
Immediate start
You can immediately switch the auxiliary climate
control on and off using the — button. When this
function is switched on, a colored bar lights up
over the button and the remaining time is dis-
played.
The auxiliary climate control will run for a maxi-
mum of 30 minutes after the immediate start.
When charging with sufficient charging power,
the auxiliary climate control can run for up to 60
minutes.
Timer programming
You can set up and activate up to two timers for
the departure time.
> Select one timer.
> Set the date and press Next.
> Set the time (departure time) and press OK.
The timer will be activated automatically once
itis set.
> Set the second timer, if necessary.
By setting the departure time, you determine
when your vehicle should reach the desired tem-
perature. The departure time can be a maximum
of six days in the future. The auxiliary climate
control will continue to run approximately ten
minutes after the departure time is reached.
After switching off the ignition
Information about the active timer(s) will appear
on the upper display after switching off the igni-
tion. You can start the set climate control set-
tings immediately with the F button, or go to the
auxiliary climate control menu with the > button. >

4N0012721BF
Checking and Filling

should only be performed by an authorized Audi
dealer or authorized Audi Service Facility > A\.
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
— Plug-in hybrid drive: High-voltage battery (for
example, for electric driving) > page 131, In-
troduction.
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.

this, all work must be performed only by an
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.
12 Volt vehicle battery
Explanation of warnings:


Always wear eye protection.

Battery acid is highly corrosive. Always
wear protective gloves and eye protection.

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

Z\ WARNING
— All work on the battery or electrical system
in your vehicle can result in injuries, chemi-
cal burns, accidents, or burns. Because of

A highly explosive mixture of gases can
form when charging batteries. >
@
>
©

285

4N0012721BF
Fuses and bulbs





















































Fuse panel () (black) Fuse panel @) (brown)
Luggage compartment lid central locking, 15 |Left rear seat adjustment
11 | fuel filler door, sunshade, luggage com- Front belt tensioner on front passenger's
partment cover 16 side
12 | Luggage compartment lid control module
— Fuse panel (4) (black)
Fuse panel (2) (red) No. | Equipment
No. | Equipment Seat ventilation, rear seat heating, rear-
1 | Rear climate control system blower 1 |view mirror, refrigerator, diagnostic con-
2 | Exterior antenna nection
3 | Exhaust treatment, sound actuator 2 | Gateway control module (communication)
4 |Rear climate control system control panel 3 [Sound actuator
5 | Right trailer hitch light 4 |Transmission heating valve
6 |Trailer hitch positioning motor 5 |Engine start, electric drive
7 |Trailer hitch release 7 |Active accelerator pedal
8 | Left trailer hitch light 8 | Night vision assist, active suspension
9 |Trailer hitch socket 9 _|Adaptive cruise assist
10 |Allroad sport differential 1 Intersection assistant, driver assist sys-
11 | Exhaust treatment tems, radar systems, camera systems
12 |48 V drivetrain generator 2 || Exteriorsoundigenerator
13 | USB input
Fuse panel (3) (brown) 14 [Right headlight
No. | Equipment 15 |Left headlight
1 |Driver assistance systems control module :
2 |Rear Audi phone box Fuse panel () (red)
3 | Rear seat adjustment No:.| Equipment
4 |Side assist 1 | Active suspension
5 |Sereensinthe rear 2 |Service disconnect switch
6 |Tire pressure monitoring system 3_|Refrigerator
7 [Emergency call system 4 | Electric drive system
Auxiliary heating radio receiver, tank mod- 5 |/Brake-system
8 ule 6 | High-voltage battery water pump
9 | Automatic transmission selector lever 7 |Auxiliary climate control
0 TV tuner, data exchange and telematics 8 |Climate control system compressor
control module 9 |Auxiliary battery control module
rT Convenience access and start authoriza- 10 | High-voltage battery
tion control module 11 | High-voltage charger
12 | Garage door opener 14 | Thermal management
13 | Rearview camera, peripheral cameras 15 | Thermomanagement control module
Convenience system control module, right -
14 | Vil light Fuse panel 6) (white)
No. | Equipment
1 |Rear center armrest heating

331

Index


Vehicle jacks. « sie sc emcee e eww oe em ves 317
Lifting points...... 2.0.0... eee eee eee 321
Tire change Mode.... 1... eee eee sees 319
VehIClE Keys ¢ « sas x = heen ¢ o hake oP eee 41,45
Vehicle Sound... . 6... cece eee eee eee 116
Vehicle start systeM.... 2.2.0.2... eee 118
Vehicle toolkit... 0.0... 0... eee eee eee 317
VeMEILAtIOMS, « 6 cess « cnennic = 1 cena a @ ammo wa 100
VIEW DUBE OMI + 3 seco © x saouawe 2 x cameo osama oo 13
Voiceriiaibs «2 viciine 2 x owas eo snvem 2 x amin 0 3 a 217
Voice recognition system ..............065 34
BxXHOE Maly escse = mucana we wweanan x execone 6 x ena 35
Operating ....... 0... ccc eee eee eee ee 34
WwW
Wall mount clip...........0... ce eee eee 145
Warning lights
refer to Indicator lights.................. 7
Washing matte finish paint.............. 310
Wave band
refer to Frequency band............... 242
Weights ........... 0.0 cece eee eee ee 344
Wheel bolts............ 000 c cece 304
ANti-Cheft cas s nuwa & s Been & + eRS oe Sew 320
Tightening specification............... 323
Wheels x isasis a i snniss o a nauasa s & aninass wo eomnene @ 289
Cleaning 312
Glossary of tire and loading terminology.. 292
Loose wheel warning.................. 304
REPIAGIG s sxannce » seanens oo eee co sien oe o ete 319
Tire pressure monitoring system........ 308
Tires and vehicle load limits............ 302
Wheel wrench’: « seas: s + gem « x sewn 2 2 seme 317
Wi-Fi
Hotspot:settings:s. ss wie a 6 owen ae aie a 225
Using ahotspot................--000- 223
Wild animal recognition................ 159
Window and mirror heating............. 105
Windows
Child safety lock.............02-000000- 51
Cleaning and removingice............. 312
Convenience opening and closing......... 53
Defrosting ........-. 600 c eee eee eee 102
Opening and closing................... 52
POWEPWINdOWSins « 2 caves x s waves 4s eaure 4 es 52
358
Windshield
Cleaning..... 22.2... cece eee eee eee 66
also refer to Windshield................ 66
Windshield washer system..........- 66, 287
Reservoir capacityies « + sass +o wesw + 3 meen 344
Windshield wipers.................00-0- 66
Winter operation
Auxiliary climate control............... 104
Car washes ....... 0.0.00 cece cece 310
COGLIFG SYSTEM: « 2 wees s x eee ss meee ese 281
Defrosting the windows............... 102
Rear window defogger................ 102
Removing ice from windows............ 312
Seat heating. « = scr. sa wee. a eee @ © wees 102
Snow chains............ 00sec eens 305
Steering wheel heating................ 104
Surface heating «wees «sees se ewes a 4 ear 103
THRCSiis so ceontens 6 sccrees +o onemeite aw oman © 9 oom 305
Vehicle battery (12 Volt)............... 285
Windshield washer system............. 287
WINEEPEIRES 2 osu 5 ¢ ean so mem a yeaa ee 305
Wireless Apple CarPlay
refer to Audi smartphone interface...... 261
Wireless charging...............+-+05- 213