tow AUDI A8 2021 Service Manual

4N0012721BF
Parking and maneuvering


and that no obstacles will move into the ve-
hicle's path.
@) Tips
The parking process will be interrupted tem-
porarily if an obstacle is detected.


Maneuver assist!)2)
Applies to: vehicles with maneuver assist

Fig. 152 Upper display: maneuver assist
General information
The maneuver assist supports the driver when
maneuvering and parking by monitoring the area
in front of, behind, and beside the vehicle using
sensors. If there is an impending collision with an
object, the system will intervene within its limits
and attempt to prevent the collision by applying
the brakes. The system will detect objects that
are approximately 8 inches (20 cm) high or high-
er.
Display overview
The displays @ - @ indicate the status and avail-
ability of the maneuver assist.
@ The white border indicates the availability in
this area.
The red border indicates an object nearby.
If there is no border, this indicates an inactive
area (partial availability).
®
©®&
Activate/deactivate maneuver assist and sta-
tus displays:

)_ In preparation at the time of printing.
2) System availability may be limited depending on the mar-
ket.
— 4 Maneuver assist activated. The vehicle is
bordered in white. If the sensors are parti-
ally available, the white border will only be
visible in the monitored areas.
— % Maneuver assist is temporarily deacti-
vated.
— (symbol shown in gray) Maneuver assist
is not available.
— No symbol: maneuver assist was switched
off completely in the settings.
Braking intervention
Braking intervention can be initiated if there is an
impending possible collision with a detected sta-
tionary object. If the brakes were applied until
the vehicle stopped, Maneuver assist: vehicle
has been braked. Obstacle detected will appear
in the instrument cluster and you must take over
control of the vehicle.
If you continue driving toward the obstacle after
the
vehicle is braked to a stop, maneuver assist
will automatically be temporarily deactivated un-
til the next maneuvering situation.

Z\ WARNING
Observe the safety precautions and note the
limits of the assist systems, sensors, and
cameras > page 150.
(i) Tips
-If the B indicator light blinks while driving,
ESC will intervene to regulate and maneuver
assist will be canceled.
— System functions may not be available if the
ESC is limited or switched off, or if there is a
malfunction.
— The system will not be available when cer-
tain assist systems are switched on or if
park assist plus is used.


207

Parking and maneuvering

Activating or deactivating maneuver assist
Applies to: vehicles with maneuver assist
Requirements
> Maneuver assist must be switched on in the
parking system settings in the MMI.
> The speed must not be higher than approxi-
mately 6 mph (10 km/h).
Automatic activation
Maneuver assist activates automatically when re-
verse gear is engaged while the engine is run-
ning. A brief tone will sound.
Deactivating temporarily
If you do not want to use maneuver assist during
a parking cycle, you can deactivate it temporarily.
If maneuver assist is deactivated temporarily, it
will be activated again automatically the next
time park assist is activated.
> To deactivate maneuver assist temporarily,
press % @) > page 207, fig. 152 in the upper
display. The “% symbol will appear.
If you continue driving toward the obstacle after
the vehicle is braked to a stop, maneuver assist
will automatically be temporarily deactivated un-
til the next maneuvering situation.
Activating manually
You can activate maneuver assist in various ways
depending on the situation:
> To activate maneuver assist manually (such as
when driving forward), press the % button in
the center console.
> To reactivate maneuver assist after it has been
deactivated temporarily, press 74 @,
=> page 207, fig. 152 in the upper display. The
® symbol will appear.
Switching on or off permanently
» Applies to MMI: Select on the home screen: VE-
HICLE > Parking aid > Maneuver assist. Or
> Select [| > Maneuver assist in the upper dis-
play when the parking aid is active.


If maneuver assist is switched off permanently,
there will be no symbol in the center of the vehi-
cle graphic @) > page 207, fig. 152.
208

ZA WARNING
Observe the safety precautions and note the
limits of the assist systems, sensors, and
cameras > page 150.
Messages
Applies to: vehicles with maneuver assist

if or fg is displayed when there is a malfunc-
tion, the maneuver assist functions may be un-
available or may be limited.
A message that indicates the cause and possible
solution may appear with some displays. The
weather conditions may be too poor or a sensor
may be covered. Clean the area in front of the
sensors and cameras > page 152 and try to turn
the system on again later.
If the malfunction remains, drive to an author-
ized Audi dealer or authorized Audi Service Facili-
ty immediately to have the malfunction correct-
ed.

Navigation

Selecting map content (such as POIs) as the
destination
Requirement: map content must be displayed
=> page 240.
> Press on map content on the map (for example,
ii).
Selecting the destination
> Select: F2 > Start.
Route guidance will be activated and the map will
be displayed > page 234, fig. 162.
Stopovers and route plan
Applies to: vehicles with navigation system

You can enter additional destinations during ac-
tive route guidance.
Entering a stopover
Requirement: route guidance must be active.
> Enter a destination > page 231.
Displaying stopovers or the route plan
All destinations are listed in the route plan.
> Press on fin the side menu on the map
=> page 234, fig. 162.
Editing stopovers
> Press on Pin the side menu on the map
=> page 234, fig. 162.
> Adding a stopover: Select: Add destination >
select a destination > Add to route.
> Moving a stopover: press Z. Touch the > sym-
bol and move the entry to the desired position.
Press Done.
> Deleting a stopover: Select: Z > one or more
entries or Select all > Delete > (Done).
Stopping route guidance
Applies to: vehicles with navigation system
Requirement: route guidance must be active and
the map must be displayed.
> Applies to: MMI: Press { > page 234, fig. 162.
> Applies to: multifunction steering wheel: Select
in the instrument cluster: Navigation tab >
button > Cancel route guidance.
234

Map
Map functions
Applies to: vehicles with navigation system
yn >] 13:51 | E53 Dreshertown Rd
py pe Dee aay a ae LE
- oF ‘a € “epio
Fig. 163 Marked map object

Opening the map
Applies to: MMI
> Press NAVIGATION on the home screen.
> If necessary, press A to display the map.
The following list gives an overview of the infor-
mation displayed on the map. Press on any func-
tion (for example, alternative routes) to show ad-
ditional options.
Select destination > page 232
Enter a destination using intelligent search
=> page 231
Cancel route guidance > page 234
Current route
Request spoken prompt
Alternative routes > page 236
COOH
OO
Display active destinations, stopovers, or
route plan > page 234. The distance to the
destination including the calculated arrival
time is displayed.
Online traffic information > page 239
Altitude ©®

4N0012721BF
Checking and Filling

Fuel filler door emergency release
Applies to: vehicles with manual fuel filler door release

If the central locking system malfunctions, the
fuel filler door can be unlocked manually.



Fig. 177 Right cover in the luggage compartment: remov-
ing the cover



Fig. 178 Luggage compartment: fuel filler door emergency
release
The emergency opening mechanism is located
behind the right cover in the luggage compart-
ment.
> Remove the screwdriver from the vehicle tool
kit > page 317.
> Carefully insert the flat side of the screwdriver
from below into the center of the top slot in the
cover > fig. 177.
> Use the screwdriver to pull the cover toward the
center of the vehicle and remove the cover.
> To unlock the fuel filler door, loosen the red
loop from the retainer and then pull on the
loop carefully > fig. 178 > ©.
> Press on the left side of the fuel filler door to
open it > page 271, fig. 175.
® Note
Only pull on the loop until you feel resistance.
You
will not hear it release. If you continue to
pull, you could damage the emergency re-
lease mechanism.
@ Tips
Applies to: vehicles with plug-in hybrid drive
— The tank will not be vented if the emergency
release function was used on the fuel filler
door. You can only fill a small amount of
fuel in the tank. Fill only until the fuel pump
nozzle turns off for the first time. Drive to
an authorized Audi dealer or authorized
Audi Service Facility immediately to have
the malfunction corrected.
— Pressure can escape if you open the tank cap
after using the emergency release. This can
create noises.
Emissions control
system
General information
ZA\ WARNING
The temperature of the exhaust system is
high, both when driving and after stopping
the engine.
— Never touch the exhaust tail pipes once they
have
become hot. This could result in burns.
— Do not park your vehicle over flammable
materials such as grass or leaves because
the high temperature of the emissions sys-
tem could start a fire.
— Do not apply underbody protectant in the
exhaust system area, because this increases
the risk of fire.
Catalytic converter
Observe the safety precautions > page 273, Gen-
eral information.


The vehicle may only be driven with unleaded
gasoline, or the catalytic converter will be de-
stroyed.
Never drive until the tank is completely empty.
The irregular supply of fuel that results from that
can cause engine misfires. Uncombusted fuel
could enter the exhaust system, which could >
273

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
>

Wheels


Z\ WARNING
Please note the important safe-
ty precautions regarding tire
pressure > page 299 and load
limits > page 302.
Tires and vehicle load limits
There are limits to the amount of
load or weight that any vehicle
and any tire can carry. A vehicle
that is overloaded will not handle
well and is more difficult to stop.
Overloading can not only lead to
loss of vehicle control, but can al-
so damage important parts of the
vehicle and can lead to sudden
tire failure, including a blowout
and sudden deflation that can
cause the vehicle to crash.

Your safety and that of your pas-
sengers also depends on making
sure that load limits are not ex-
ceeded. Vehicle load includes ev-
erybody and everything in and on
the vehicle. These load limits are
technically referred to as the vehi-
cle’s Gross Vehicle Weight Rating
(“GVWR”).
The “GVWR” includes the weight
of the basic vehicle, all factory in-
stalled accessories, a full tank of
fuel, oil, coolant and other fluids
302
plus maximum load. The maxi-
mum load includes the number of
passengers that the vehicle is in-
tended to carry (“seating capaci-
ty”) with an assumed weight of
150 lbs. (68 kg) for each passen-
ger at a designated seating posi-
tion and the total weight of any
uggage in the vehicle. If you tow
a trailer, the weight of the trailer
hitch and the tongue weight of
the loaded trailer must be includ-
ed as part of the vehicle load.
The Gross Axle Weight Rating
(“GAWR’”) is the maximum load
that can be applied at each of the
vehicle’s two axles.

The fact that there is an upper
limit to your vehicle’s Gross Vehi-
cle Weight Rating means that the
total weight of whatever is being
carried in the vehicle (including
the weight of a trailer hitch and
the tongue weight of the loaded
trailer) is limited. The more pas-
sengers in the vehicle or passen-
gers who are heavier than the
standard weights assumed mean
that less weight can be carried as
luggage.
The Gross Vehicle Weight Rating
and the Gross Axle Weight Rating >

Wheels

be five 150 lbs. passengers in
your vehicle, the amount of
available cargo and luggage
load capacity is 650 lbs.
(1400-750 (5 x 150) = 650
lbs.)
5. Determine the combined
weight of luggage and cargo
being loaded on the vehicle.
That weight may not safely ex-
ceed the available cargo and
luggage load capacity calculat-
ed in Step 4.
6. If your vehicle will be towing a
trailer, load from your trailer
will be transferred to your vehi-
cle. Consult this manual to de-
termine how this reduces the
available cargo and luggage
load capacity of your vehicle.
>Check the tire sidewall
(=> page 290, fig. 187) to deter-
mine the designated load rating
for a specific tire.
Wheel bolts and rims
Wheel bolts
Wheel bolts must be clean and loosen/tighten
easily.
Rims
Rims with a bolted rim ring* or with bolted wheel
covers* consist of multiple pieces. These compo-
nents were bolted together using special bolts
and a special procedure. You must not repair or
disassemble them > A\.
304

ZA WARNING
Wheel bolts that are tightened or repaired in-
correctly can become loose and result in loss
of vehicle control, which increases the risk of
an accident. For the correct tightening specifi-
cation, see > page 323, Finishing.
— Always keep the wheel bolts and the threads
in the wheel hub clean and free of grease.
— Only use wheel bolts that fit the rim.
— Always have damaged rims repaired by an
authorized Audi dealer or authorized Audi
Service Facility. Never repair or disassemble
rims yourself, because this increases the risk
of an accident.
Loose wheel warning
Applies to: vehicles with loose wheel warning


Within the limits of the system, the loose wheel
warning in the instrument cluster warns you if
one or more wheels are loose.
Using the ABS sensors, the loose wheel warning
system compares the vibration characteristics of
the individual tires. If one or more wheels are
loose, it will be indicated in the instrument clus-
ter display with the fi indicator light and a mes-
sage. If only one wheel is affected, the location
of that wheel will be indicated.
Messages
fi Wheel bolts loose. Please safely stop the ve-
hicle and check all wheel bolts!
Loose wheel warning for at least one wheel > A\.
Check the wheel bolts on all wheels with the
wheel wrench (vehicle tool kit). Have the tighten-
ing specification checked as soon as possible with
a torque wrench. Drive carefully until then. For
the correct tightening specification, see
=> page 323, Finishing.
fl Wheel assessment active. Please continue
driving carefully
After this message appears and you have checked
the wheel bolts, the assessment phase begins
when the vehicle is in motion. This may take sev-
eral minutes.

Care and cleaning

Care and cleaning
General information
Regular, proper care helps to maintain your vehi-
cle's value. It can also be a requirement when
submitting warranty claims for corrosion damage
and paint defects on the body.
The required cleaning and care products can be
obtained from an authorized Audi dealer or au-
thorized Service Facility. Read and follow the in-
structions for use on the packaging.

ZA\ WARNING
— Using cleaning and care products incorrectly
can be dangerous to your health.
— Always store cleaning and care products out
of reach of children to reduce the risk of poi-

soning.

@ For the sake of the environment
— Purchase environmentally-friendly cleaning
products if possible.
— Do not dispose of cleaning and care prod-
ucts with household trash.
Car washes
The longer that deposits such as insects, bird
droppings, tree sap or road salt remain on the ve-
hicle, the more the surface can be damaged. High
temperatures such as those caused by sunlight
increase the damaging effect.
Before washing, rinse off heavy deposits with
plenty of water.
Stubborn deposits such as bird droppings or tree
sap are best removed with plenty of water anda
microfiber cloth.
Also, wash the underside of your vehicle once
road salt stops being used for the season.
Pressure washers
When washing your vehicle with a pressure wash-
er, always follow the operating instructions pro-
vided with the pressure washer. This is especially
important in regard to the pressure and spraying
distance. Do not aim the spray directly at the
310
seals on the side windows, doors, hood, luggage
compartment lid, or sunroof*, or at tires, rubber
hoses, insulating material, sensors*, camera
lenses*, or the laser scanner*. Keep a distance of
at least 16 inches (40 cm).
Plug-in hybrid drive: Do not direct the stream of
water towards the wall mount clip*.
Do not remove snow and ice with a pressure
washer.
Never use cone nozzles or high pressure nozzles.
The water temperature must not be above 140 °F
(60 °C).
Automatic car wash
Spray off the vehicle before washing.
Make sure that the windows and roof* are closed
and the windshield wipers are off. Make sure that
the vehicle is still able to roll during the washing
process in the car wash. Follow instructions from
the car wash operator, especially if there are ac-
cessories attached to your vehicle.
If possible, use car washes that do not have
brushes.
Washing by hand
Clean the vehicle starting from the top and work-
ing downward using a soft sponge or cleaning
brush. Use solvent-free cleaning products.
Washing vehicles with matte finish paint by
hand
To reduce the risk of damaging the paint when
washing, first remove dust and large particles
from your vehicle. Insects, grease spots, and fin-
gerprints are best removed with a special cleaner
for matte finish paint.
Apply the product using a microfiber cloth. To re-
duce the risk of damaging the paint surface, do
not use too much pressure.
Rinse the vehicle thoroughly with water. Then
clean using a neutral shampoo and a soft micro-
fiber cloth.
Rinse the vehicle thoroughly again and let it air
dry. Remove any water residue using a chamois. >

Care and cleaning




Component Situation Solution
Laser scanner Deposits Soft sponge with a mild soap solution®
Wheels Road salt Water
Brake dust Acid-free special cleaning solution
Exhaust tail Road salt Water, cleaning solution suitable for stainless steel, if nec-
pipes essary
Decorative parts | Deposits Mild soap solution ®, a cleaning solution suitable for stain-
and
trim
less steel, if necessary

Paint Paint damage Repair with touch-up paint

Spilled fuel Rinse with water immediately

Surface rust Rust remover, then treat with hard wax; for questions, con-
sult an authorized Audi dealer or authorized Audi Service
Facility.

Corrosion Have it removed by an authorized Audi dealer or authorized
Audi Service Facility.

Water no longer
beads on the surface
of clean paint
Treat with hard wax (at least twice per year)

No shine even though
paint has been pro-
tected/paint looks
poor
Treat with suitable polish; then apply paint protectant if
the polish that was used does not contain any protectant

Deposits such as in-
sects, bird droppings,
tree sap, and road
salt
Dampen with water immediately and remove with a micro-
fiber cloth

Grease-based con-
taminants such as
cosmetics or sunblock
Remove immediately with a mild soap solution ® and a soft
cloth

Carbon compo-__| Deposits clean the same way as painted parts > page 310
nents
Decorative decals | Deposits Soft sponge with a mild soap solution®
Audi e-tron Deposits Soft, dry towel
charging system
Wall mount clip | Deposits Soft towel with alcohol-free cleaning solution

a) Mild soap solution: maximum two tablespoons of
Interior cleaning
neutral soap in 1 quart (1 liter) of water


Component Situation Solution
Window glass Deposits Glass cleaner, then wipe dry
Decorative parts {Deposits Mild soap solution®
and
trim

312