brakes AUDI Q8 2021 Owner´s Manual

4M8012721BF
Driver assistance

may only be able to avoid a collision by swerving
or braking strongly.
Automatic braking force increase
If there is an impending collision and you are not
applying the brakes enough, the braking force
may be increased, depending on the situation.
Automatic braking
If you do not react to the acute warning, the sys-
tem may apply the brakes with strong braking
force within the limits of the system in order to
reduce the speed of impact in the event of a colli-
sion.
If the brakes were applied until the vehicle stop-
ped, © Please take over! will appear in the in-
strument cluster and you must take over control
of the vehicle.

ZA WARNING
— Observe the safety precautions and note the
limits of the assist systems, sensors, and
cameras > page 121.
— Audi pre sense front cannot overcome natu-
ral physical laws. It is a system designed to
assist and it cannot prevent a collision in ev-
ery circumstance. The driver must always in-
tervene. The driver is always responsible for
braking at the correct time. Do not let the
increased safety provided tempt you into
taking risks. This could increase your risk of
a collision.
— Audi pre sense front does not react to cer-
tain objects, such as animals, crossing or on-
coming vehicles, bars, railings, or railcars.
— Audi pre sense front may be limited or un-
available when driving in curves.
— 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.
— In trailer mode, the braking behavior of the
trailer can be different than usual during au-
tomatic braking.

@) Tips
Certain pre sense front functions are switched
off when the hill descent assist is actively con-
trolling the vehicle.
Audi pre sense rear
Applies to: vehicles with Audi pre sense rear
Within the limits of the system, Audi pre sense
rear uses data from radar sensors at the rear cor-
ners of the vehicle and calculates the probability
of a rear-end collision with the vehicle behind
you.
Audi pre sense preemptive safety measures can
be initiated if the risk of a collision with the vehi-
cle behind you is detected.

Z\ WARNING
— Observe the safety precautions and note the
limits of the assist systems, sensors, and
cameras > page 121.
— Audi pre sense rear does not react to pedes-
trians, animals, crossing objects, and ob-
jects not detected as vehicles.
@) Tips
— Audi pre sense rear functions switch off
when trailer mode is detected. There is no
guarantee the functions will switch off
when using a retrofitted trailer hitch.
— Audi pre sense rear functions may also
switch off if there is a malfunction in the
side assist system.
Audi pre sense side
Applies to: vehicles with Audi pre sense side

Within the limits of the system, Audi pre sense
can warn about impending collisions with cross-
traffic and vehicles approaching from the side,
and trigger Audi pre sense preemptive safety
measures.
The system uses additional sensors in the front
and rear areas and is active at speeds up to ap-
proximately 35 mph (60 km/h).
151

4M8012721BF
Driver assistance

Displays, warnings, and braking
— Display: the red arrow @ can indicate the direc-
tion from which the cross traffic is approaching.
The indicator in the upper display only appears
when the parking aid is activated. For vehicles
with peripheral cameras only in the Front and
Front corner camera views. The display only ap-
pears in the instrument cluster > fig. 116 when
the Driver assistance display is open in the on-
board computer > page 16.
— Warnings: the message Cross traffic! © can
warn about critical cross-traffic when driving
forward. There may also be an audible signal.
— Automatic brake activation: if you do not react
to a warning, a brief braking by the system can
warn you of a potential collision with an ap-
proaching object when driving forward at
speeds up to approximately 6 mph (10 km/h).
Switching the intersection assistant on and
off
— The system can be switched on and off in the
MMI & page 124.
Messages
If Eo, or > is displayed when there is a mal-
function, the intersection assistant functions
may be unavailable 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 > page 123 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.

ZA\ WARNING
— Observe the safety precautions and note the
limits of the assist systems, sensors, and
cameras © page 121.
— The intersection assistant will not provide
alerts about people and cannot warn you
about every type of approaching objects,
such as cyclists. Always monitor the traffic


as well as the vehicle's surroundings with di-
rect eye contact.
—The system may not react if vehicles are ap-
proaching very fast.
G@) Tips
— The coverage areas of the sensors > fig. 115
are diagrams and do not represent a true-
to-scale image of the sensor ranges.
— The system complies with United States FCC
regulations and ISED regulations
> page 311.


Emergency assist
Applies to: vehicles with emergency assist
General information
Within the limits of the system, emergency assist
can detect inactivity from the driver. In these in-
stances, the system will warn the driver, assume
control of the vehicle if necessary, and bring the
vehicle automatically to a stop in the lane.
Regardless of the speed, the emergency assist is
automatically available when the adaptive cruise
assist* is activated. When the adaptive cruise as-
sist* is deactivated, the system is only available
at speeds above approximately 40 mph
(65 km/h).
Emergency assist functions
Measures may be initiated in stages. The vehicle
can be controlled with the limits of the system.
The measures depend on the dangerous situation
and the vehicle equipment:
— Visual and audio warnings
— Vehicle control
— Reduction of vehicle speed in stages
— Lowers the volume of the Infotainment system
— Tugs on the safety belt
— Activates the brakes
— The emergency flashers are activated
— Audi pre sense preemptive safety measures are
triggered > page 150
— The brakes are applied until the vehicle is sta-
tionary
157

4M8012721BF
Parking and maneuvering

The driver is always responsible for adhering
to the regulations applicable in the country
where the vehicle is being operated.
Parking with park assist plus!)2)
Applies to: vehicles with park assist plus



Fig. 131 Upper display: park assist plus display
Requirement: a suitable parking space must be
found and selected > page 167. The vehicle must
initially be stationary and the brakes must be
pressed.
> Remove your hands from the steering wheel.
> Pay attention to the path of the vehicle. If the
traffic situation permits it, press and hold the
>>P] button @ and release the brakes > /A\.
> Pay attention to the path of the vehicle. In sit-
uations where conditions are unclear, pause the
parking process by releasing the |>>P] button.
For example, this may be necessary if an obsta-
cle appears or the vehicle comes very close to
an obstacle.
> To resume the parking process, press and hold
the 2>P] button again. The rest of the parking






)_ System availability may be limited depending on the mar-
ket.
2) In preparation at the time of printing.

process will be recalculated based on the vehi-
cle position.
LED in the button @)
The LED informs about the availability of park as-
sist plus:
— Blinking white - park assist plus is ready to
control the parking process automatically or to
resume after an interruption.
— Green - park assist plus is active.
— Red - park assist plus was paused or stopped. A
message will appear in the instrument cluster
display > page 173.
Indicator in the upper display
The current driving maneuver and the status of
the park assist plus are shown in the upper dis-
play:
@ Path that the vehicle will travel during the
current parking maneuver
@® End point of the current parking maneuver/
direction change
@ 8 Park assist plus active
© Driving direction display
End of the parking process
The parking process will end automatically once
the vehicle has reached the end point in the park-
ing space. After park assist plus finishes parking
successfully, the parking lock will be engaged
and the parking brake will be set.
Pause park assist plus > page 173.

/\ WARNING
— Observe the safety precautions and note the
limits of the assist systems, sensors, and
cameras > page 121.

— Press and hold the [>>P] button only if you
are sure that there are no obstacles in the
vehicle's path or under the vehicle, and that
no obstacles will move into the vehicle's
path. >


171

Parking and maneuvering


— Park assist plus is an assist system. The driv-
er is still responsible for monitoring the ve-
hicle's surroundings and preventing colli-
sions when using the system.
— When using park assist plus to drive into or
out of a parking space, the steering wheel
turns quickly on its own. Reaching into the
steering wheel spokes while this is happen-
ing can result in injury.
— Sensors and cameras have spots in which
the surrounding area cannot be detected.
Objects, animals, and people may only be
detected with limitations may not be detect-
ed at all. Always monitor the traffic and the
vehicle's surroundings directly and do not
become distracted.

@) Tips
— You can reduce the speed specified by the
system at any time by pressing the brake
pedal.
— The system can incorrectly interpret parking
space barriers (such as parking curbs). Take
over the parking process = page 173 if the
vehicle is not completely inside the parking
space or if the vehicle tries to drive over the
parking space barrier.
— The image in the display is an enlarged and
distorted image. Under certain circumstan-
ces, objects may appear different and un-
clear on the display. This is especially true if
there are objects that do not touch the
ground, such as the bumper of a parked ve-
hicle or the rear of a truck. Drive with spe-
cial care and do not use the image if neces-
sary.
— Applies to vehicles with air suspension: The
accuracy of the orientation lines and green
surfaces in the display decreases when the
vehicle is raised or lowered with the air sus-
pension.

)_ system availability may be limited depending on the mar-
ket.
2) In preparation at the time of printing.
172
Exiting a parking space with park assist
Pye oa)
Applies to: vehicles with park assist plus
If you parked the vehicle in a parallel parking
space, park assist plus can help you drive out of
it.
> Start the engine.
> Press P@ in the lower display.
> Wait until a message appears on the upper dis-
play that requests you to select the direction to
travel in when exiting the parking space.
> Activate the turn signal on the desired side or
press that side next to the vehicle in the upper
display.
> Remove your hands from the steering wheel.
> Pay attention to the path of the vehicle. If the
traffic situation permits it, press and hold the
>>P] button @ > page 171, fig. 130 and re-
lease the brakes > A\.
> Pay attention to the path of the vehicle. If an
obstacle appears, interrupt the parking process
by releasing the [>>P] button. The vehicle re-
mains stopped.
> To resume the parking process, press and hold
the [>>P| button again.
> The process of exiting the parking space has
ended if additional corrective movements are
no longer necessary and the specified steering
wheel angle is sufficient to drive out of the
parking space. Resume control of the steering
wheel >@).






Pause park assist plus > page 173.

Z\ WARNING
— Observe the safety precautions and note the
limits of the assist systems, sensors, and
cameras > page 121.
— Press and hold the [>>P] button only if you
are sure that there are no obstacles in the
vehicle's path or under the vehicle, and that
no obstacles will move into the vehicle's
path. >

Parking and maneuvering

eae atm eatle Mel tecel (eM eee atte pace
Applies to: vehicles with remote park assist plus
To stop the vehicle, you can temporarily pause re-
mote controlled parking at any time using your
mobile device.
You can also completely stop the parking process
and come to full stop immediately using the ve-
hicle key by pressing any button on the vehicle
key. Therefore, always keep the vehicle key with
you during the remote controlled parking proc-
ess.
Canceling automatically
The remote controlled parking will be canceled
automatically in the following situations, among
other things:
— If the myAudi app is not started soon after exit-
ing
the vehicle,
— If you switch off the system
— If the time limit is exceeded
— The ESC intervenes
Taking over the parking process
After canceling the parking process, the vehicle
will come to a stop and the "P" position will be
engaged. Take over control of the vehicle, end the
parking process manually, and stop the vehicle.
You can also restart the entire parking process
from inside the vehicle.

Z\ WARNING
— Observe the safety precautions and note the
limits of the assist systems, sensors, and
cameras > page 121.
— Failing to pay careful attention to the vehi-
cle's surroundings increases the risk of an
accident. Park your vehicle with the mobile
device only if you are sure that no obstacle is
in the vehicle's path or under the vehicle,
and that no obstacles will move into the ve-
hicle's path.


D_ System availability may be limited depending on the mar-
ket.
2) In preparation at the time of printing.
178
G) Tips
The parking process will be interrupted tem-
porarily if an obstacle is detected.
Maneuver assist2)”)

Fig. 133 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:
®
©®&
—*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.

4M8012721BF
Parking and maneuvering

— % Maneuver assist is temporarily deacti-
vated.
— A (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 121.
G@) Tips
— The system is only partially available when a
trailer is detected. The white outline is hid-
den at the inoperative areas. There is no
guarantee the functions will be deactivated
when using a retrofitted trailer hitch.
—Ifthe BB 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.
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 178, fig. 133 in the upper
display. The 7% 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 4 button in
the center console.
> To reactivate maneuver assist after it has been
deactivated temporarily, press 74 @,
=> page 178, fig. 133 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 178, fig. 133.

ZA WARNING
Observe the safety precautions and note the
limits of the assist systems, sensors, and
cameras > page 121.


179

Checking and Filling

> 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.

ZX 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 242, 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.

© 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.
250
Brake fluid

BFV-0229]


Fig. 162 Engine compartment: cap on brake fluid reservoir
Observe the safety precautions > page 242, 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 244, fig. 159. The brake fluid lev-
el must be between the MIN and MAX markings
ANG
The brake fluid level is monitored automatically.
Messages
GG fi @® Brakes: stop vehicle and check brake
fluid level
Stop the vehicle and check the brake fluid level.
See an authorized Audi dealer or authorized Audi
Service Facility for assistance.
Changing the brake fluid
Brake fluid should be changed at regular inter-
vals. Have the brake fluid changed by an author-
ized Audi dealer or authorized Audi Service Facili-
ty. The authorized Audi dealer or authorized Audi
Service Facility will inform you of the replace-
ment intervals.

A WARNING
— If the brake fluid level is below the MIN
marking, it can impair the braking effect and
driving safety, which increase the risk of an

4M8012721BF
Wheels

Glossary of tire and loading
terminology
Accessory weight
means the combined weight (in
excess of those standard items
which may be replaced) of auto-
matic transmission, power steer-
ing, power brakes, power win-
dows, power seats, radio, and
heater, to the extent that these
items are available as factory-in-
stalled equipment (whether in-
stalled or not).
Aspect ratio
means the ratio of the height to
the width of the tire in percent.
Numbers of 55 or lower indicate a
low sidewall for improved steer-
ing response and better overall
handling on dry pavement.
Bead
means the part of the tire that is
made of steel wires, wrapped or
reinforced by ply cords and that is
shaped to fit the rim.
Bead separation
means a breakdown of the bond
between components in the bead.
Cord
means the strands forming the
plies in the tire.
Cold tire inflation pressure
means the tire pressure recom-
mended by the vehicle manufac-
turer for a tire of a designated
size that has not been driven for
more than a couple of miles (kilo-
meters) at low speeds in the three
hour period before the tire pres-
sure is measured or adjusted.
Curb weight
means the weight of a motor ve-
hicle with standard equipment in-
cluding the maximum capacity of
fuel, oil, and coolant, air condi-
tioning and additional weight of
optional equipment.
Extra load tire
means a tire designed to operate
at higher loads and at higher in-
flation pressures than the corre-
sponding standard tire. Extra load
tires may be identified as “XL”,
“xl”, “EXTRA LOAD”, or “RF” on
the sidewall.
259

4M8012721BF
Wheels

Production options weight
means the combined weight of
those installed regular production
options weighing over 5 lbs.
(2.3 kg) in excess of those stand-
ard items which they replace, not
previously considered in curb
weight or accessory weight, in-
cluding heavy duty brakes, ride
levelers, roof rack, heavy duty
battery, and special trim.
Radial ply tire
means a pneumatic tire in which
the ply cords that extend to the
beads are laid at substantially
90 degrees to the centerline of
the tread.
Recommended inflation
pressure
see > page 259, Cold tire infla-
tion pressure.
Reinforced tire
means a tire designed to operate
at higher loads and at higher in-
flation pressures than the corre-
sponding standard tire. Rein-
forced tires may be identified as
“XL”, “xl”, “EXTRA LOAD”, or “RF”
on the sidewall.
Rim
means a metal support for a tire
or a tire and tube assembly upon
which the tire beads are seated.
Rim diameter
means nominal diameter of the
bead seat. If you change your
wheel size, you will have to pur-
chase new tires to match the new
rim diameter.
Rim size designation
means rim diameter and width.
Rim width
means nominal distance between
rim flanges.
Sidewall
means that portion of a tire be-
tween the tread and bead.
Speed rating (letter code)
means the speed at which a tire is
designed to be driven for extend-
ed periods of time. The ratings
range from 93 mph (150 km/h)
to 186 mph (298 km/h) > table
on page 257. You may not find
this information on all tires be-
cause it is not required by law.
The speed rating letter code,
where applicable, is molded on
the tire sidewall and indicates the >
261

Wheels

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
luggage 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
are listed on the safety compli-
270
ance sticker label located on the
driver’s side B-pillar.

Z\ WARNING
Overloading a vehicle can cause
loss of vehicle control, a crash
or other accident, serious per-
sonal injury, and even death.
—Carrying more weight than
your vehicle was designed to
carry will prevent the vehicle
from handling properly and in-
crease the risk of the loss of
vehicle control.
—The brakes on a vehicle that
has been overloaded may not
be able to stop the vehicle
within a safe distance.
—Tires ona vehicle that has
been overloaded can fail sud-
denly, including a blowout and
sudden deflation, causing loss
of control and a crash.
—Always make sure that the to-
tal load being transported -
including the weight of a trail-
er hitch and the tongue
weight of a loaded trailer -
does not make the vehicle
heavier than the vehicle’s
Gross Vehicle Weight Rating.