2020 AUDI A3 brakes

8V2012721BK
Assist systems

@® Indicator lights
B - Adaptive cruise control must be switched
on. No vehicles are detected ahead. The stored
speed is maintained.
B - Avehicle driving ahead was detected. The
adaptive cruise control system regulates the
speed and distance to the vehicle ahead and
brakes/accelerates automatically.
B - Adaptive cruise control must be switched
on. A vehicle was detected ahead. Your vehicle re-
mains stopped and will not start driving auto-
matically.
B - The automatic braking is not enough to
maintain a sufficient distance to a vehicle driving
ahead. You must intervene > page 124, Driver in-
tervention request.
@ Instrument cluster display
If adaptive cruise control is not shown in the in-
strument cluster display, you can call it up using
the multifunction steering wheel buttons
=> page 17.
Based on the graphics in the display, you can de-
termine if the system is maintaining a distance to
a vehicle ahead and what that distance to this ve-
hicle is:
No vehicle - No vehicle was detected driving
ahead.
Silver vehicle - A vehicle was detected driving
ahead.
Red vehicle - Request for driver intervention
=> page 124.
The five distance bars on the gauge (4) represent
the set distance (refer to > page 123 for infor-
mation on how to change the distance). If you
fall below the selected distance, the distance
bars become red from the bottom upward.

ZA\ WARNING
If you press the [SET] button when driving at
speeds below 20 mph (30 km/h), the vehicle
accelerates automatically up to 20 mph (30
km/h), which is the minimum speed that can



be set.

@) Tips
— If you switch the ignition or the adaptive
cruise control system off, the set speed is
erased for safety reasons.
— The Electronic Stabilization Control (ESC)
and the Anti-Slip-Regulation (ASR) are auto-
matically switched on when the adaptive
cruise control is switched on.
Changing the speed
Applies to: vehicles with Audi adaptive cruise control

[RAZ-0344


Fig. 114 Operating lever: changing the speed
> To increase or decrease the speed in incre-
ments, tap the lever in the @/G) direction.
> To increase or decrease the speed quickly, hold
the lever toward )/G) until the red LED @)
=> page 120, fig. 113 reaches the desired
speed.
You can also preselect the speed when adaptive
cruise control is not active by moving the lever in
the desired direction @)/©). Activate the previ-
ously selected speed by pulling the lever into po-
sition @ > page 120, fig. 112.
After each change, the new stored speed appears
briefly in the status line > page 120, fig. 113 ©.
When adaptive cruise control is active, the or
a indicator light turns on, and when adaptive
cruise control is not active, the gy indicator light
turns on. In the Audi virtual cockpit*, the indi-
cator light turns on instead.
121

8V2012721BK
Assist systems

> Press the brake pedal.
> To resume the stored speed, move the lever in-
to position @).
Interrupting cruise control when stopped
> Push the lever away from you into position @).
The message ACC: standby appears.
> To resume cruise control, press the brake pedal
and pull the lever toward you into position (2).

Z\ WARNING
It is dangerous to activate cruise control and
resume the stored speed when the current
road, traffic or weather conditions do not per-
mit this. This increases the risk of an accident.
Setting the distance
Applies to: vehicles with Audi adaptive cruise control



B4M-0234


Fig. 117 Operating lever: setting the distance
> Tap the switch to display the distance that is
currently set > fig. 117.
> To increase or reduce the distance in incre-
ments, tap the switch upward/downward again.
The distance between the two vehicles will
change in the instrument cluster display.
When approaching a vehicle driving ahead, the
adaptive cruise control system brakes to match
that vehicle's speed and then adjusts to the set
distance. If the vehicle driving ahead accelerates,
then the adaptive cruise control will also acceler-
ate up to the speed that you have set.
The higher the speed, the greater the distance
=> A\. The Distance 3 setting is recommended.
That is equal to the general recommendation of
“half the speed shown on the speedometer”.
The distances provided are specified values. De-
pending on the driving situation and how the ve-
hicle ahead is driving, the actual distance may be
more or less than these target distances.
If you change the time gaps, the value you have
just set appears briefly in the instrument cluster
display, for example [Eg for Distance 3. This only
occurs if the adaptive cruise control is not cur-
rently shown in the display > page 120, fig. 113.
Distance 1: this setting corresponds to a distance
of 92 feet (28 m) when traveling at 62 mph (100
km/h), or a time distance of 1 second.
Distance 2: this setting corresponds to a distance
of 118 feet (36 m) when traveling at 62 mph
(100 km/h), or a time distance of 1.3 seconds.
Distance 3: this setting corresponds to a distance
of 164 feet (SO m) when traveling at 62 mph
(100 km/h), or a time distance of 1.8 seconds.
Distance 4: this setting corresponds to a distance
of 219 feet (67 m) when traveling at 62 mph
(100 km/h), or a time distance of 2.4 seconds.
Distance 5: this setting corresponds to a distance
of 328 feet (100 m) when traveling at 62 mph
(100 km/h), or a time distance of 3.6 seconds.

ZA WARNING
When setting the distance, the driver is re-
sponsible for adhering to any applicable legal
regulations.
(i) Tips
Your settings are automatically stored and as-
signed to the remote control key being used.
Setting the driving program
Applies to: vehicles with Audi adaptive cruise control

Depending on the selected driving program and
distance, driving behavior when accelerating will
vary from dynamic to comfortable.
Setting the driving program on vehicles
without drive select*

MENU > Select in the Infotainment system: but-
ton > Vehicle > left control button > Driver as-
sistance > Audi adaptive cruise control >

123
>

8V2012721BK
Assist systems

This message appears if the sensor view is ob-
structed, for example by leaves, snow, heavy
spray or dirt. Clean the sensor > page 119,
fig. 109.
ACC: currently unavailable. Incline too steep
The road exceeds the maximum possible angle
for safe adaptive cruise control operation. The
adaptive cruise control cannot be switched on.
ACC: only available in D, Sor M
The adaptive cruise control system only works in
the specified selector lever position. Select the
respective selector lever position.
ACC: parking brake applied
The adaptive cruise control system switches off
automatically if the parking brake is set. The
adaptive cruise control is available again after re-
leasing the parking brake.
ACC: currently unavailable. Stabilization
control input
This message appears if the Electronic Stabiliza-
tion Control (ESC) is taking action to stabilize the
vehicle. In this case, adaptive cruise control
switches off automatically.
ACC: Please take over!
This message appears if the vehicle rolls back
when starting on a slight incline, even though
ACC is active. Press the brake pedal to prevent
the vehicle from rolling or starting to move.
ACC: currently unavailable. Park assist active
The systems switch off when Park assist* is ac-
tive. The systems are available again after com-
pleting the parking process.
Distance warning: malfunction! Please contact
Service
The system cannot guarantee that it will detect
vehicles correctly and it has switched off. The ra-
dar sensor was moved or is faulty. Drive to an au-
thorized Audi dealer or authorized Audi Service
Facility immediately to have the malfunction cor-
rected.
Distance warning: currently unavailable. Sensor
view limited due to surroundings.
This message appears if the sensor view is ob-
structed, for example by leaves, snow, heavy
spray or dirt. Clean the sensor > page 119,
fig. 109.
Distance warning: currently unavailable. See
owner's manual
This message appears if the system has a tempo-
rary failure. If this occurs multiple times, drive to
an authorized Audi dealer or authorized Audi
Service Facility immediately to have the malfunc-
tion corrected.
Fasten seat belt
The system is not completely available if the driv-
er's seat belt is unfastened.
Stat. obj. ahead
This message appears if you would like to switch
the system on and there is a stationary object di-
rectly in front of your vehicle.
Door open
The system is not available when the vehicle is
stationary and the driver's door is open.
Audi pre sense
Introduction
Applies to: vehicles with Audi pre sense
Within the limits of the system, the pre sense
functions can initiate measures in particularly
dangerous situations to protect the vehicle pas-
sengers and other road users.
— Due to the interlinking of various vehicle sys-
tems, critical driving situations can be detected
by pre sense basic and measures for preventa-
tive occupant protection are can be initiated.
— The pre sense front uses the data from the ra-
dar sensors and calculates the probability of an
accident > page 119. An impending collision
with vehicles can be detected within the limits
of the system. In this case, the system warns
the driver visually, acoustically and with a jerk
on the brakes if necessary. If needed, it can ini-
tiate a partial or full deceleration to reduce the
collision speed or to avoid the collision under
certain circumstances. In conjunction with pre >
125

Assist systems

sense basic, the front safety belts are also re-
versibly tensioned when needed. The pre sense
front is also active when adaptive cruise con-
trol* is switched off.

ZA\ WARNING
Also follow the general instructions found in
= A in General information on page 119.
G) Tips
— Certain pre sense functions switch off when
driving in reverse.
— The pre sense functions may not be availa-
ble if there is a malfunction in the ESC sys-
tem or the airbag control module.
— Note that the reversible belt tensioner on
the front passenger's side deactivates when
the front passenger's airbag is deactivated.
— Certain Audi pre sense front functions are
unavailable or have limited availability for
approximately 20 seconds after starting the
vehicle (may be longer depending on the
driving situation).
— Switch the pre sense off when you are not
using public streets or when loading the ve-
hicle onto a vehicle carrier, train, ship, or
other type of transportation. This can pre-
vent an undesired intervention from the pre
sense system.
ONT ees
Applies to: vehicles with Audi pre sense basic

The pre sense basic functions are activated at a
speed of approximately 20 mph (30 km/h) or
higher.
The following functions can be triggered under
certain conditions within the limits of the sys-
tem:
—Tensioning of the safety belts (for example,
during heavy braking): the front safety belts
have reversible belt tensioners. If a collision
does not occur, the safety belts loosen slightly
and are ready to trigger again.
— Initiating the closing of the windows and the
panoramic glass roof* (for example when un-
der- or oversteering).
126
Audi drive select*: the trigger times are adjusted
depending on the mode selected.
Audi pre sense front
Applies to: vehicles with Audi pre sense front

RAH-8970
Audi pre sense


Fig. 120 Instrument cluster: approach warning
Description
Within the limits of the system and depending
on the situation and speed, pre sense front can
warn you about impending collisions with sta-
tionary, stopped, and moving vehicles and ini-
tiate appropriate braking measures.
If detection is not possible, then pre sense front
does not react.
The following functions trigger in conjunction
with pre sense basic at corresponding vehicle
speeds:
— Reversible tensioning of the front safety belts
— Closing the windows and panoramic glass roof*
Early warning/acute warning
The system can provide visual and audible warn-
ings when dangerous situations are detected. The
early warning may occur if:
—a vehicle driving ahead brakes strongly,
— your vehicle is traveling at speeds between ap-
proximately 20 to 50 mph (30 to 85 km/h) and
it approaches a stationary vehicle.
— your vehicle is traveling at speeds between ap-
proximately 20 to 155 mph (30 to 250 km/h)
and it approaches a vehicle that is clearly trav-
eling more slowly or a vehicle in your direction
of travel that is stopped.
When this warning occurs, it may only be possi-
ble to avoid a collision by swerving or braking >

Assist systems

G) Tips
— Side assist is not active while you are mak-
ing the adjustment.
— Your settings are automatically stored and
assigned to the remote control key being
used.
RET oa ar lie 4
Applies to: vehicles with rear cross-traffic assist
1. S 2
= + oO

Fig. 128 Example display

Fig. 129 Infotainment system: rear cross-traffic assist dis-
play
Activating rear cross-traffic assist
The rear cross-traffic assist is activated automati-
cally if you turn on the parking aid > page 136 or
shift into reverse gear.
The rear cross-traffic assist can warn the driver of
a potential collision with approaching cross-traf-
fic when driving in reverse at speeds up to ap-
proximately 7 mph (12 km/h). Within its limits,
the system monitors the areas behind and next
to the vehicle using the radar sensors when leav-
ing a parking space > page 132, fig. 127. Moving
objects that are approaching, such as cars, are
detected > fig. 128.
If the system detects critical cross traffic when
backing out of a parking space, it will react as fol-
lows:
134
— Visual indicator: an indicator appears in the In-
fotainment system display with a red arrow
symbol. The arrow points in the direction from
which the object is approaching > fig. 129.
— Audible warning signal: a continuous tone may
sound as an additional indicator when driving in
reverse.
— Automatic brake activation: a brief activation
of the brakes may also warn you of a potential
collision with an approaching object.
The audible warning signal and the automatic
brake activation occur only when driving in re-
verse.

iN WARNING
—The rear cross-traffic assist is an assist sys-
tem and cannot prevent a collision by itself.
The driver must always intervene. The driver
is always responsible for braking at the cor-
rect
time.
— Please note that the rear cross-traffic assist
may activate the brakes unexpectedly. Se-
cure any cargo that you are transporting to
reduce the risk of damage or injury.
— An additional brake activation may be trig-
gered within 10 seconds after an automatic
brake activation.
—If there is an acoustic warning signal from
the rear cross-traffic assist, then the parking
system may not warn you of detected obsta-
cles under certain circumstances.
— The view of the radar sensors may be im-
paired by leaves, snow, heavy spray or dirt.
Clean the area in front of the sensors
=> page 132, fig. 127.

ZA WARNING
— The rear cross-traffic assist 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 rear cross-traffic assist will not provide
alerts if your vehicle is parallel or diagonally

8V2012721BK
Assist systems


parked or if your vehicle is pulled too far in-
to the parking space so that it is hidden by
adjacent vehicles.

@) Note
Also read the information in >@ in General
information on page 133.
@ Tips
— You can cancel the automatic brake activa-
tion with increasing braking force if you ap-
ply the brakes yourself or accelerate consid-
erably.
—In some situations, rear cross-traffic assist
may warn you even if there is no cross traffic
in a critical area, for example when backing
into a parking space or maneuvering.
— The rear cross-traffic assist also switches off
when you switch off the ESC.
— For an explanation on conformity with the
FCC regulations in the United States and the
Industry Canada regulations, see
=> page 377.
Applies to: vehicles with Audi side assist
& Audi side assist: malfunction! Please contact
Service
The system cannot guarantee that it will detect
vehicles correctly and it has switched off. The
sensors have been moved or are faulty. Have the
system checked by an authorized Audi dealer or
authorized Audi Service Facility soon.
Audi side assist: currently unavailable. No
sensor view
Audi side assist: currently unavailable. Sen-
sor vision restricted due to surroundings. See
owner's manual
The radar sensor vision is impaired. Do not cover
the area in front of the sensors with bike wheels,
stickers, dirt or other objects. Clean the area cov-
ering the sensors, if necessary > page 132,
fig. 127.
Audi side assist: currently unavailable
Side assist cannot be switched on at this time be-
cause there is a malfunction (for example, the
battery charge level may be too low).
Rear parking aid: obstacle detection restrict-
ed
The rear cross-traffic assist is not available. Ei-
ther the ESC is switched off, or the radar sensors
may be covered by a bike rack, stickers, leaves,
snow or other objects. Switch the ESC on, or
clean the area in front of the sensors if necessary
= page 132, fig. 127. If this message continues
to be displayed, drive immediately to an author-
ized Audi dealer or authorized Audi Service Facili-
ty to have the malfunction repaired.
135

Checking and Filling

Message
EG / @ 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.

Z\ 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
accident. Do not continue driving. See an au-
thorized Audi dealer or authorized Audi
Service Facility for assistance.
— If the brake fluid is old, bubbles may form in
the brake system during heavy braking. This
could impair braking performance and driv-
ing safety, which increases the risk of an ac-
cident.
— The brake fluid in your vehicle must meet
the standard VW 501 14 and is available at
an authorized Audi dealer or authorized
Audi Service Facility. If this brake fluid is not
available, another high-grade brake fluid of
equivalent quality may be used, and it must
meet the U.S. Federal Motor Vehicle Stand-
ard (FMVSS) 116 DOT 4, Class 6.

© Note
— If the brake fluid level is above the MAX
marking, brake fluid may leak out over the
edge of the reservoir and result in damage
to the vehicle.
— Do not allow any brake fluid to come into
contact with the vehicle paint, because it
will corrode the paint.
314
Electrical system
If the | or = indicator light turns on, there is a
malfunction in the generator, the battery, or the
vehicle electrical system.
z= Electrical system: malfunction! Battery is
not charging
Safely stop your vehicle, do not continue driving
and switch the ignition off > A\. See an author-
ized Audi dealer or authorized Audi Service Facili-
ty for assistance.
=} Electrical system: malfunction! Restart not
possible. Please contact Service
It will not be possible to restart the engine once
you turn it off. Vehicle functions/driving stability
may be limited. Drive to an authorized Audi deal-
er or authorized Audi Service Facility immediate-
ly.
z= Electrical system: malfunction! Please con-
tact Service
Switch off all electrical equipment that is not
needed. Vehicle functions/driving stability may
be limited. Drive to an authorized Audi dealer or
authorized Audi Service Facility immediately.
= Electrical system: low battery charge. Bat-
tery will be charged while driving
The starting ability may be impaired.
If this message turns off after a little while, the
vehicle battery has charged enough while driving.
If this message does not turn off, drive immedi-
ately to an authorized Audi dealer or authorized
Audi Service Facility.

ZA\ WARNING
When there is an electrical system malfunc-
tion, vehicle functions may not work and driv-
ing stability may be limited, which increases
the risk of an accident. Do not continue driv-
ing and switch the ignition off. See an author-
ized Audi dealer or authorized Audi Service Fa-
cility for assistance.

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.
322
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.