2021 AUDI A8 ECU

4N0012721BF
Sitting correctly and safely

Yala e Maal Ce Mt iia att OM ame)
PV C@ Eliane)



Fig. 75 Rear bench seat: marker points and lower LATCH
anchors
Observe the safety precautions > page 88.
In the United States and Canada, child safety
seats can be secured without safety belts using
the LATCH system. LATCH stands for Lower An-
chors and Tethers for Children. In Canada, similar
systems are called UCRA, LUAS, or UAS.
The lower LATCH anchors in your vehicle are lo-
cated on the outer seats of the rear bench seat
between the seat surface and the backrest. These
seating locations each have two lower LATCH an-
chors that can be used to secure a LATCH child
safety seat. Marking points with a > fig. 75 sym-
bol are located on the backrest of the rear bench
seat. You can locate the LATCH anchors using the
marking points.
> Applies to: vehicles with power-adjustable rear
bench seat: Move the rear seat all the way back
and downward and position the backrest so it is
as upright as possible.
> Activate the child safety lock > page 51.
> If you secure a child safety seat to the rear seat,
secure any unused safety belts that are within
reach of the child > A\ in Securing child safety
seats with a safety belt on page 92.
> Secure the child safety seat according to the
child safety seat manufacturer instructions.
> Pull on the child safety seat to check if both
sides are engaged correctly in the LATCH an-
chors.
> If possible, also secure the child safety seat to
the respective top tether anchor on the seat
=> page 92.

ZX WARNING
The LATCH anchors in the vehicle are only de-
signed for child safety seats with the LATCH
system. To reduce the risk of serious or fatal
injury, never secure other child restraint sys-
tems, belts, or objects to the anchors.
@ Tips
The LATCH anchors are designed for a total
weight (child and child safety seat combined)
up to 65 lbs (29 kg). If the total weight is
greater than this, the child safety seat must
be secured with the vehicle safety belt.
Securing child safety seats with a safety
Prt
Observe the safety precautions > page 88. The
front passenger’s seat is a dangerous location for
a child, even with an advanced airbag system. If
exceptional circumstances require the child safe-
ty seat to be placed on the front passenger's
seat, then the front passenger's airbag must be
deactivated. Please note the important informa-
tion for this > page 90, Correct positioning for
children and > page 86, Advanced airbag sys-
tem.

Securing child safety seats
> Applies to: vehicles with power-adjustable rear
bench seat: If you secure a child safety seat to
the rear seat, move the rear seat all the way
back and downward and adjust the backrest to
be as upright as possible.
> Activate the child safety lock > page 51.
> If you secure a child safety seat to the rear seat,
secure any unused safety belts that are within
reach of the child > A\, > page 93.
> If you secure a child safety seat to the front
passenger's seat, adjust the front passenger's
seat to the highest position.
>» Secure the child safety seat according to the
child safety seat manufacturer instructions.
> If necessary, activate the belt retractor lock
=> page 92, Activating the belt retractor lock.
> If the child safety seat is secured on the front
passenger's seat, adjust the front passenger's
seat backrest until it rests flat against the child >
91

Sitting correctly and safely

safety seat. Also make sure that the upper safe-
ty belt fixture is behind the child safety seat.
> If you secure a child safety seat on the rear
seat, also secure it to the correct top tether an-
chor if possible > page 92.
Activating the belt retractor lock
If you secure a child safety seat using the vehicle
safety belt, you must activate the belt retractor
lock. Follow the child safety seat manufacturer
instructions.
The belt retractor lock prevents the safety belt
from becoming loose while driving, which could
result in the child safety seat no longer being ad-
equately secured.
> Secure the child safety seat according to the
child safety seat manufacturer instructions.
While doing so, pull out the safety belt. Insert
the safety belt into the belt latch that belongs
to that seat until it audibly locks.
> Pull the upper belt out completely and then al-
low it to retract. You will hear a clicking sound
while the belt is retracting. It will not be possi-
ble to pull the safety belt out any farther.
> Push the child safety seat into the seat and al-
low the belt to retract more.
> Make sure that the child safety seat cannot
move more than 1 inch (2.5 cm).
Deactivating the belt retractor lock
> Unbuckle the safety belt from the belt latch.
> Remove the child safety seat according to the
manufacturer instructions.
> Allow the safety belt to retract completely. The
belt retractor lock is deactivated.


passenger's seat when the front passenger's
airbag is switched on.
— For the child safety seat to offer the maxi-
mum protection, it is especially important
to route the vehicle safety belt correctly. Al-
ways follow the instructions from the child
safety seat manufacturer for routing the
safety belt correctly. Incorrectly fastened
safety belts can cause injuries, even during
minor accidents.



Additionally secu
the top tether an
ig a child safety seat to


RAZ-0091

Fig. 76 Rear shelf: top tether anchors to secure a child
safety seat with an upper belt

RAZ-0092




ZA WARNING
— A safety belt that is not locked by the belt
retractor lock or a locking device cannot se-
cure a child safety seat while driving or in
the event of an accident, which increases the
risk of fatal injury. Always make sure the
belt retractor lock on the safety belt is acti-
vated if the child safety seat manufacturer
instructions require it.
— Due to the risk of fatal injury, never place a
rear-facing child safety seat on the front

92
Fig. 77 Rear shelf: securing the upper belt to the top teth-
er anchor
Observe the safety precautions > page 88.
There is a top tether anchor behind every seat in
the rear bench seat to additionally secure a child
safety seat with an upper belt. Depending on the
vehicle equipment, there may be two or three top
tether anchors.
» Applies to: head restraints on the outer rear
seats: Adjust the head restraints behind the
child safety seat upward.

4N0012721BF
Sitting correctly and safely

> Applies to: head restraint on the center rear
seat: Fold the head restraint downward.
> Lift the cover for the top tether anchor upward.
> Secure the child safety seat according to the
child safety seat manufacturer instructions.
» Applies to: head restraints on the outer rear
seats: Guide the child safety seat upper belt to-
ward the rear, either under the head restraint
or next to it on both sides (depending on the
version of the child safety seat).
> Applies to: head restraint on the center rear
seat: Guide the child safety seat upper belt to-
ward the rear over the head restraint.
> Fasten the belt to the top tether anchor
=> fig. 77. While doing this, make sure the belt
is not twisted and is not running over any sharp
edges.
> Pull the belt tightly so that the child safety seat
rests at the top of the seat backrest.
> Applies to: head restraints on the outer rear
seats: Adjust the head restraints behind the
child safety seat downward if necessary.
ZA WARNING
The top tether anchors in the vehicle are only
designed for child safety seats equipped with
an upper strap. To reduce the risk of serious or
fatal injury, never secure other child restraint
systems, belts, or objects to the anchors.


SY eM etal Mere
Pre T 1

> If you secure a child safety seat to the LATCH
anchors, fasten the safety belt on the seat
where the child safety seat is installed using
the seat's safety belt latch.
> Applies to: vehicles with three seats on the rear
bench seat: If a child safety seat is secured on
one of the outer seats, fasten the safety belt
for the center seat in the center seat's latch.
> Activate the belt retractor lock on the fastened
safety belts. To do this, pull the upper belt out
completely and then allow it to retract. You will
hear a clicking sound while the belt is retract-
ing. It will not be possible to pull the safety
belt out any farther.
> Make sure the fastened safety belt does not
block access to the LATCH anchors. Otherwise,
it may not be possible to secure the child safety
seat to the LATCH anchors correctly.

ZX WARNING
A child in a child safety seat could play with
the unused safety belts and then become en-
tangled in them, which increases the risk of
fatal injury. Always secure unused safety belts
so that they are not within reach of children in

child safety seats.





Fig. 78 Rear bench seat: securing unused safety belts
If a child safety seat is used on the rear bench
seat, the child must not be able to reach any
safety belts that are not being used. Secure safe-
ty belts that are within reach of the child.
93

Storage and convenience

Storage and convenience
Power
sources
When the ignition is switched on, you may be
able to use multiple power sources for external
devices, depending on the vehicle equipment.
12 volt sockets
You can connect electrical accessories to the 12
volt sockets. The power usage from the sockets
must not exceed a total of 120 watts. Do not
connect multiple devices to the sockets in the ve-
hicle at the same time.
The 12 volt sockets are labeled with the 12V
symbol. They are located at the front and rear of
the center console and on the side trim panel in
the luggage compartment”.
USB ports
Applies to: vehicles with USB port
You can charge mobile devices using the USB
ports. The USB ports are labeled with the «> or
[4 symbol or CHARGE ONLY.
115 volt socket
Applies to: vehicles with 115 volt socket
The socket is located in the rear center console
and can be used for electrical devices > A\. The
power usage must not exceed 150 watts.
When you push the device connector all the way
into the socket, the child safety mechanism re-
leases and there is electric current.
—If the LED on the socket is green or flashes
slowly, then the socket is ready for use.
— Ifthe LED is red and flashes quickly, there is a
malfunction in the connected device or the
socket is too hot. The socket will switch off for
safety reasons. To reactivate the socket, remove
the device connector. Connect the device after
correcting the malfunction or reconnect after a
brief cool-down period.

hicle when braking or in the event of an acci-
dent.
— Incorrect usage can lead to serious injuries
or burns. To reduce the risk of injuries, never
leave children unattended in the vehicle
with the vehicle key.


ZA\ WARNING
Applies to: vehicles with 115 volt socket
—To reduce the risk of fatal injury, do not in-
sert any conductive objects, such as knitting
needles, into the contacts on the socket.
—To reduce the risk of fatal injury, do not spill
any fluids on the socket. Should any mois-
ture enter the socket, make sure that it has
dried out completely before using the socket
again.
— If devices or connectors that are heavy (such
as a power supply unit) are attached directly
to the socket, the holder can become dam-
aged, which increases the risk of injury.
— Using adapters and extension cables in-
creases the risk of injury because they over-
ride the safety devices for the socket.
—To reduce the risk of injury, remove the con-
nector of the connected device if the socket
has switched off due to a malfunction.


ZA\ WARNING
— To reduce the risk of fatal injury, store all
connected devices securely when driving so
that they do not move around inside the ve-

94
(!) Note
— Read the operating manuals for the con-
nected devices.
—To reduce the risk of damage to the vehicle
electrical system, never attempt to charge
the vehicle battery by connecting accesso-
ries that provide power to the power sour-
ces.
— Do not connect any device whose network
class (voltage) does not match the network
class designed for the socket.
— Disconnect the connectors from the power
sources carefully to reduce the risk of dam-
aging them.
@) Tips
Applies to: vehicles with 115 volt socket
— Devices that are not shielded or devices near
the rear window antenna can cause

4N0012721BF
Storage and convenience

Additional storage
Depending on vehicle equipment, there are a va-
riety of storage areas, compartments, and retain-
ers, such as the glove compartment, for safely
storing and securing objects.

Z\ WARNING
—To reduce the risk of injury, make sure all
storage compartments are always closed
while driving.
— Loose objects can be thrown around the ve-
hicle interior during sudden driving or brak-
ing maneuvers, which increases the risk of
an accident. Store objects securely while
driving.
— Only use the storage compartments in the
door trim panels to store small objects that
will not stick out of the compartment and
impair the function of the side airbags.
— Only lightweight clothing should be hung
from the garment hooks in the vehicle. Do
not use clothes hangers to hang clothing.
The pockets of the clothing must not con-
tain any heavy, breakable, or sharp-edged
objects. This could impair the effectiveness
of the side curtain airbags.
— Make sure your view toward the rear is not
blocked, for example by hanging clothing or
objects in the vehicle.

Luggage compartment
General information
All pieces of luggage or objects must be securely
fastened in the luggage compartment. Note the
following to maintain good vehicle handling:
> Distribute the load evenly in the luggage com-
partment.
> Stow heavy luggage as far forward in the lug-
gage compartment as possible.
> Use non-elastic cords attached to the tie-downs
to secure objects.

ZA WARNING
— Loose objects can be thrown around the ve-
hicle interior during sudden driving or brak-



ing maneuvers, which increases the risk of
an accident. Always stow objects securely in
the luggage compartment and secure them
at the tie-downs. Use straps suitable for
heavy objects.
— If pieces of luggage or objects are secured
to the tie-downs with unsuitable or dam-
aged straps, this can increase the risk of in-
jury during braking maneuvers or accidents.
— When transporting heavy objects, the vehi-
cle characteristics will change due to the
shift in the center of gravity, which increases
the risk of an accident. You may need to
adapt your driving style and speed to the
current conditions.
— The cargo net* is only strong enough to se-
cure light objects. Heavy objects are not ade-
quately secured. Attempting to secure heavy
objects increases the risk of injury.
— Never exceed the permitted axle and load
and vehicle weight > page 344.
— Never secure a child safety seat to the tie-
downs.
— Never leave your vehicle unattended, espe-
cially if the luggage compartment lid is
open. Children could enter the luggage com-
partment and close the luggage compart-
ment lid from the inside. This creates the
risk of fatal injury, since the children would
be locked in and may not be able to escape
by themselves.
— Do not allow children to play in or on the ve-
hicle. Close and lock the luggage compart-
ment lid as well as all other doors when you
leave the vehicle.
— Never transport passengers in the luggage
compartment. Every passenger must be cor-
rectly secured with the safety belts in the
vehicle > page 80.

® Note
— Make sure that the heating grid strips for
the rear window defogger are not damaged
by abrasive objects.
— Plug-in hybrid drive: Never exceed the maxi-
mum cargo weight for the cargo floor that is
specified on the sticker. Otherwise, the
high-voltage battery that is located
97

Storage and convenience

underneath the cargo floor could be dam-
aged. The sticker is located on the inner side
of the opened luggage compartment lid.

— The tire pressure must be adapted to the
load > page 299.
— You can purchase straps at specialty stores.

Fig. 84 Rear bench seat with three seats: opening the cov-
er

Fig. 85 Rear bench seat with two seats: lowering the cover
» Applies to: vehicles with three rear seats: Fold
down the center armrest in the rear and the
cover behind it.
> Applies to: vehicles with two rear seats: Press
the button @) and the cover will move down au-
tomatically @).
98









Fig. 87 Luggage compartment: luggage compartment net*
stretched out
Observe the safety precautions > page 97.
Tie-downs
There are tie-downs (4) in the luggage compart-
ment to secure pieces of luggage and objects.
» Use the tie-downs to secure the cargo.
Cargo net
Applies to: vehicles with cargo net
Use the cargo net (2) to secure lighter objects in
the luggage compartment
> Fold the clip for the tie-downs upward.
» Attach the hooks for the cargo net to the tie-
downs.

4N0012721BF
Warm and cold

@) Tips
— Make sure the time and date match in the
system settings so that the timer can func-
tion correctly > page 263.
— The auxiliary climate control can also be
switched on and off immediately when a
timer is set.
— You can operate the climate control in the
vehicle interior when the high-voltage bat-
tery is charging using the charging timer
= page 136. The climate control output de-
pends on the power supply capacity.
Additional settings
Applies to: vehicles with auxiliary climate control
> Applies to MMI: Select on the home screen: VE-
HICLE > Air conditioning > F > <2.
Start A/C after unlocking
If this function is activated, the climate control
will continue to run for five minutes after the ve-
hicle has been unlocked.
Comfort aux. A/C
Applies to: vehicles with comfort auxiliary climate control
You can set if the steering wheel heating* and
seat heating” or seat ventilation* should also be
automatically activated with auxiliary climate
control. You can select the respective zones.
Window and mirror heating*
Applies to: vehicles with comfort auxiliary climate control
You can set if the rear window and mirrors should
also be heated during auxiliary climate control.
Messages
Applies to: vehicles with auxiliary climate control
2— There is a malfunction in the auxiliary air
conditioning.
If this message appears, there is a system mal-
function. Drive immediately to an authorized
Audi dealer or authorized Audi Service Facility to
have the malfunction repaired.
Fluids in the A/C system
Refrigerant in the A/C system
The sticker in the engine compartment provides
information about the type and amount of refrig-
erant used in the vehicle’s A/C system. The stick-
er is located in the front section of the engine
compartment or at the front or back of the hood.

Symbol | Meaning

Warning: the A/C system must only
be serviced by qualified technicians. A
Refrigerant type
wt
ot
Lubricant type

Refer to the service information
(only available for authorized Audi
dealers or authorized Audi Service
Facilities)
Y

The A/C system must only be serv-
iced by qualified technicians.

Flammable refrigerant
Se
Be

Make sure all components are dis-
posed of correctly and never install
components in the vehicle that have
been removed from old vehicles or
a


taken from recycling.

Lubricant in the A/C system
The sticker in the engine compartment provides
information about the type and amount of refrig-
erant oil used in the vehicle’s A/C system. For the
refrigerant oil quantity, refer to the Technical Da-
ta > page 344.

ZX WARNING
To ensure secure and safe operation, the A/C
system must only be serviced by qualified
technicians and certified technicians (SAE
standard J2845).


@) Tips
— Never repair the A/C system evaporator with
components from old vehicles or from recy-
cling.
105
>

Driving


usual may increase the risk of accidents and
serious injuries.
— Secure the vehicle against rolling before ex-
iting the vehicle > page 108.

@) Note
— Avoid high engine speed, full throttle, and
heavy engine load if the engine has not
reached operating temperature yet. You
could damage the engine.
— If the engine has been under heavy load for
an extended period of time, heat builds up
in the engine compartment after the engine
is switched off and there is a risk of damag-
ing the engine. For this reason, let the en-
gine run at idle for approximately two mi-
nutes before shutting it off.
@ Tips
— Brief noises are normal when starting and
stopping the vehicle and are no cause for
concern.
— For up to 10 minutes after stopping the en-
gine, the radiator fan may turn on again au-
tomatically or it may continue to run, even if
the ignition is switched off.
— It may not be possible to start the vehicle in
extremely low temperatures.
— Power will be fully available once the engine
is at operating temperature.
Messages
Hj Engine start system: malfunction! Please
contact Service
Do not switch the ignition off because you may
not be able to switch it on again. Drive to an au-
thorized Audi dealer or authorized Audi Service
Facility immediately to have the malfunction cor-
rected.
B Engine start system: malfunction! Please
contact Service
There is a malfunction in the engine start system.
Drive immediately to an authorized Audi dealer
or authorized Audi Service Facility to have the
malfunction repaired.
108
B Remote control key: key not detected. Is the
key still in the vehicle?
The vehicle key was removed from the vehicle
while the engine is running. If the vehicle key is
no longer in the vehicle, you cannot switch the ig-
nition on or start the engine once you stop it. You
also cannot lock the vehicle from the outside.
Remote control key: hold back of key
against the designated area. See owner's man-
ual
The battery in the vehicle key may be drained or
there may be a malfunction. To start the vehicle,
you must also hold the vehicle key against the lo-
cation shown ?) > page 107, fig. 91.
If the malfunction remains, drive immediately to
an authorized Audi dealer or authorized Audi
Service Facility to have the malfunction correct-
ed.
When driving
Starting to drive, stopping, and parking
Starting from a stop
> Press and hold the brake pedal.
> Start the engine.
> Select a gear.
> Release the parking brake.
> Release the brake pedal. The vehicle may roll.
> Press the accelerator pedal to accelerate.
Securing the vehicle against rolling
Secure your vehicle to prevent it from rolling be-
fore exiting the vehicle.
> Set the parking brake.
> Select the “P” selector lever position.
> If parking on a steep road, turn the steering
wheel so that your vehicle will roll against the
curb in case it should start to move.
If one of these measures is not possible, for ex-
ample because there is no vehicle power, you
must secure your vehicle against rolling using ad-
ditional measures.
> Only park the vehicle on a level surface.
> Use suitable objects to block the front and rear
wheels.