2021 AUDI Q2 brakes

Driver assist systems

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-The automatic brake application with in­
creasing brake force can be cancelled by ap­
plying the brakes yourself or by pressing the
accelerator firmly.
- In certain situations, a warning may be giv­
en by the rear cross-traffic assist even if
there is no traffic in the critical zone, for in­
stance when parking or manoeuvring the ve­
hicle in reverse.
- The rear cross-traffic assist is deactivated
automatically if you deactivate the
ESC.

-The rear cross-traffic assist is switched on/
off via the parking aid
^>page
134.
-The system is not available in towing mode.
Driver messages
Applies to: vehicles with Audi side assist
Should the side assist be deactivated automati­
cally, a driver message will appear in the instru­
ment cluster display.

O
Audi side assist: system fault!
The system cannot detect vehicles reliably and
will be deactivated. The sensors are out of align­
ment or defective. Have the system checked by a
qualified workshop soon.

O
Audi side assist: currently unavailable. No
sensor vision

O
Audi side assist: currently unavailable.
Sen­

sor view restricted due to surroundings. See
owner's manual
The radar sensors are blocked. The area in front
of the sensors must not be obstructed by bicycle

racks,
stickers, deposits or any other substances.
If necessary, clean the area in front of the
sen­

sors
^>page
128, Fig. 120.

O
Audi side assist: currently unavailable
The side assist is temporarily inoperative and
cannot be switched on (for instance if the battery
is not sufficiently charged).

O
Audi side assist: unavailable in towing mode

2
Audi side assist: unavailable in towing mode
The side assist function will be switched off auto­
matically after a short time when the electrical
connector for the trailer socket is plugged in on
vehicles with a factory-fitted towing bracket. If
the towing bracket is not factory-fitted the side
assist function may not be switched off automat­
ically. The side assist must not be used when
towing a trailer.

O Rear
parking aid: obstacle detection limited
The rear cross-traffic assist is not available. Ei­
ther the ESC is switched off or the radar sensors
may be obstructed by a bicycle rack, stickers,
leaves, snow or similar objects. Switch on the ESC
or, if necessary, clean the area in front of the
sen­

sors
<3page
128, Fig. 120. If this message re­
mains displayed, drive to a qualified workshop
soon and have the fault rectified.
Audi drive select
Introduction
Applies to: vehicles with Audi drive select
Audi drive select alLows you to use different set­
ups on your vehicle. The modes efficiency*, com­
fort, auto and dynamic allow the driver, for ex­

ample,
to change from a sporty mode to a more
comfortable one via the
&&
button in the centre
console or via the infotainment system. In
addi­

tion,
the individual* mode allows you to adapt
the vehicle set-up to
suit
your personal driving

style.
For example, you might choose to combine
a more dynamic engine set-up with a lighter
steering response.
Description
Applies to: vehicles with Audi drive select
The possible vehicle set-up in each mode de­
pends on which equipment is installed on your
vehicle. The engine and steering are basic parts
of your vehicle which are always included in the

set-up.

Engine and automatic gearbox*
The response of the engine and automatic
gear­

box* to accelerator pedal movements will be
more spontaneous or balanced, depending on
131

Intelligent technology

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Intelligent technology
Electronic stabilisation
control (ESC)
Description
The electronic stabilisation control (ESC) increa­
ses the car's stability. It reduces the tendency to
skid and improves the stability and roadholding
of the vehicle. The ESC detects critical handling
situations, such as understeer, oversteer and

wheelspin
on the driven wheels. It stabilises the
vehicle by braking individual wheels or by reduc­
ing the engine torque. The indicator
lamp^
in
the instrument cluster starts flashing as soon as
the ESC intervenes.
The following systems are integrated in the ESC:
Anti-lock brake system (ABS)
ABS prevents the wheels from locking up under
braking until the vehicle has reached a virtual

standstill.
You can continue to steer the vehicle
even when the brakes are on
full.
Keep your foot
on the brake pedal and do not pump the brakes.
You will feel the brake pedal puLsate while the
anti-lock brake system is working.
Brake assist system
The brake assist system can shorten the braking
distance. The braking force is automatically boos­
ted if
you
press the brake pedal quickly in an
emergency. You must keep pressing the brake
pedal until the danger has passed. On
vehides

with adaptive cruise control*, the response of the
brake assist system will be more sensitive if you
are too close to the vehicLe in front.
Traction control system (ASR)
In the event of
wheelspin,
the traction control
system reduces the engine torque to match the
amount of grip available. This helps the car to
start moving, accelerate or climb a gradient.
Electronic differential lock (EDL)
When the EDL detects wheelspin, it brakes the
spinning wheel and directs the power to the
oth­

er driven wheel (or wheels on quattro* versions).
This function is not available at high speeds.
To prevent the disc brake of the braked wheel
from overheating, the EDL cuts out automatically
if subjected to excessive loads. The vehicLe can
still be driven. The EDL will switch on again auto­
matically when the brake has cooled down.
Steering recommendation
The ESC helps to stabilise the vehicle by changing
the steering wheel torque.
Trailer stabilisation system
Applies to: vehicles with trailer stabilisation system
Trailers have a tendency to sway. If the
ESC
de­
tects that the trailer is swaying and this is affect­
ing the towing vehicLe, it will automatically brake
the vehicle in order to stabilise the trailer

^>page
97.
Selective wheel torque control
Selective wheel torque control intervenes when
cornering by braking the wheel(s) on the inside of
the bend individually as required. This enables
precision cornering.
Multicollision brake assist system
The "multicollision brake assist system" can help
to reduce the risk of skidding and further
colli­

sions during an accident. If the airbag control
unit detects that
a
collision has taken place up­
wards of
a
certain speed, the vehicle is braked by
the
ESC.

The vehicle will not be braked automatically if:
- the driver presses the accelerator,
- or the
ESC,
the brake system or the vehicle's
electrical system are not fully functional.
WARNING
- The grip provided by the ESC and the inte­
grated systems is still subject to the physi­
cal limits of adhesion. Always bear this in

mind,
especially on wet or sLippery roads. If
you notice the systems cutting in, you
should reduce your speed immediately to
suit the road and traffic conditions. Do not

let
the extra safety provided tempt you into
taking any risks when driving - this can
cause accidents.
145

Intelligent technology

/r\
WARNING
You should switch on the off-road mode or
switch off the ESC/traction control system
(ASR) only if your driving ability and the traf­
fic conditions allow you to do so safely -
dan­

ger of skidding!
- The stabilising function is restricted when
off-road mode is switched on. The driven
wheels may start to
spin,
causing the
vehi­

cle to lose grip, in particular on slippery or
wet roads.
- When the ESC/traction control system
(ASR) is switched off, the vehicle will not be

stabilised.

Brakes
New brake pads
New brake pads do not give full braking effect for
the first 400 km, they must first be "bedded in".
However, you can compensate for the slightly re­
duced braking effect by applying more pressure
on the brake pedal. Avoid placing a heavy load on
the brakes during the running-in period.
Wear
The rate of wear on the brake pads depends a
great deal on how you drive and the conditions in
which the vehicLe is operated. Negative factors

are,
for instance, city traffic, frequent short trips
or hard driving with abrupt starts and stops.
Noises
Brake noise may develop in certain situations, de­
pending on the speed, braking force and ambient
conditions (such as temperature and relative hu­
midity).
Effect of moisture and salt
In certain conditions, such as in heavy
rain,
early
morning dew, or after washing the car or driving
through water, the full braking effect can be de­
layed by moisture (or in winter by ice) on the
discs and brake pads. The brakes should be
< "dried" by pressing the pedal to restore full brak-

R
ing effect.
When you are driving at higher speeds with the
windscreen wipers on, the brake pads are very
briefly brought into contact with the brake discs.
This automatic process which goes unnoticed by
the driver is carried out at regular intervals and is
intended to improve braking response in wet
con­

ditions.
The effectiveness of the brakes can also be
tem­

porarily reduced if the car is driven for some dis­
tance without using the brakes when there is a
lot of salt on the road in winter. The layer of salt
that accumulates on the discs and pads can be
removed with a few cautious brake applications.
Corrosion
There may be a tendency for dirt to build up on
the brake pads and corrosion to form on the discs
if the car is used infrequently, or if
you
only drive
low mileages without using the brakes very

much.

If the brakes are not used frequently, or if corro­
sion has formed on the discs, it is advisable to
clean off the pads and discs by braking firmly a
few times from a moderately high speed
•=> A-

Faults in the brake system
If the brake pedal travel should ever increase
suddenly, this may mean that one of the two
brake circuits has failed. Drive immediately to the
nearest qualified workshop and have the fault

rectified.
On the way to the dealer, be prepared
to use more pressure on the brake pedal and al­
low for longer stopping distances.
Low brake fluid level
Malfunctions can occur in the brake system if the
brake fluid level is too low. The brake fluid level
is monitored electronically.
Brake servo
The brake servo amplifies the pressure you apply
to the brake pedal. It only works when the engine
is running. •
147

Intelligent technology

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WARNING

- When applying
the
brakes
to
clean
off
de­
posits
on the
pads and discs, select
a
clear,
dry
road.
Be sure
not to
inconvenience
or
en­
danger other road users;
do not
risk an
acci­

dent.
- Never
let the car
coast with
the
engine
switched
off
(this can cause accidents).

(T)
CAUTION

- Never
let the
brakes "drag"
by
leaving your
foot on
the
pedal when you
do not
really
in­

tend
to
brake. This overheats
the
brakes,
re­

sulting
in
longer stopping distances
and

greater wear.
- Before driving down
a
long,
steep gradient,
it
is
advisable
to
reduce speed
and
select
a

lower gear.
In
this way you will make use
of

the engine braking effect and relieve
the

load
on the
brakes.
If
you
still have
to use

the brakes,
it is
better
to
brake firmly
at in­

tervals than
to
apply
the
brakes continuous-

Ly

-
If
the brake servo
is out of
action,
you must
apply considerably more pressure
to the

brake pedal than you normally would.
-
If
you
wish
to
equip
the
car with accessories
such as a front spoiler
or
wheel covers,
it is

important that
the
flow
of air to the
front
wheels
is not
obstructed, otherwise
the

brakes can overheat.

Electro-mechanical

power steering
Electro-mechanical power steering assists
the

driver when steering.
The degree
of
power assistance
is
adapted elec­

tronically,
depending
on the
speed.
Warning/indicator lamps
and
driver
messages
| Do not drive vehicle: steering defective
If the warning lamp lights
up
permanently
and

the message appears, there
may be
a power
steering failure.
Stop
the
vehicle
in a
safe place
as
soon
as
possi­

ble.
Do
NOT drive on. Obtain professional assis­

tance.

S
Steering malfunction: you can continue driv­
ing
If the indicator Lamp Lights up,
the
steering
re­

sponse
may be
heavier
or
lighter than usual.
In

addition,
it is
possible that
the
steering wheel
will
be off
centre when driving
in a
straight line.
Drive slowly
to
a qualified workshop and have
the

fault rectified.
Note
You
can
drive
on if
the warnina/indicator
g/

Lamp
||
or y
|
lights
up
only briefly
Four-wheel drive
(quattro)
Applies to: vehicles with four-wheel drive

On
quattro models
the
engine power is distrib­
uted
to all
four wheels.
General notes
On four-wheel drive vehicles,
the
engine power
is

distributed
to all
four wheels. The distribution
of

power
is
controlled automatically according
to

your driving style and
the
road conditions. Also
refer
to
^>page
145,
Electronic stabilisation con­
trol
(ESC).

The four-wheel drive
is
specially designed
to

complement
the
superior engine power
of
your

Audi.
This combination gives
the car
exceptional
handling
and
performance capabilities
-
both
on

normal roads and
in
more difficult conditions,
such
as
snow and
ice.
Even
so (or
perhaps espe­
cially
for
this reason),
it is
important
to
observe
certain safety points
<=> A-

Winter tyres
Thanks
to its
four-wheel drive, your
car
will have
plenty
of
traction
in
winter conditions, even with
•

148

Seat belts

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Seat belts
Why is it so important to
use seat belts?
Seat belts provide effective protection
The common belief that passengers can brace
their weight with their hands in a minor collision
is false.

Fig.
215 Driver with correctly positioned seat belt - good
protection if the brakes are applied suddenly
It is an established fact that seat belts provide
good protection in accidents. Therefore wearing
a seat belt is required by law in most countries.
When worn correctly, seat belts hold the occu­
pants in the best position for maximum protec­
tion
^>Fig.
215. The seat belts are capable of ab­
sorbing much of the kinetic energy which is
gen­

erated in a collision. They also help to prevent
uncontrolled movements which could Lead to se­
vere injuries
^>page
275, Important safety
notes when using seat belts.
If they wear the seat belts correctly, the passen­
gers benefit greatly from the ability of the belts
to reduce the kinetic energy gradually. The front
crumple zones and other passive safety features
(such as the airbag system) are also designed to
absorb the kinetic energy generated in a
colli­

sion.
Taken together, all these features reduce
the forces acting on the occupants and conse­
quently the risk of injury.
Although these examples are based on a frontal

collision,
the physical principles involved are the
same in other types of accidents. This is why it is
so important to put on the seat belts before ev­
ery trip - even when "just driving around the cor­
ner". Ensure that your passengers wear their seat
belts as well
^A-

Seat belts worn correctly have been shown to be
an effective means of reducing the potential for
injury and improving the chances of survival in a
serious accident
^>page
276, Forces acting in a
collision.
For information on how children can travel safely
in the car refer to
^>page
267, Child seats.
A WARNING
- Seat belts must be put on before every trip -
even when driving in town. This also applies
to the rear passengers - risk of injury!
- During pregnancy, women should always
ensure they wear a seat belt. The best way
to protect the unborn child is to protect the
mother
^>page
278, Wearing and adjust­
ing the seat belts during pregnancy.
Important safety notes when using seat
belts
There are a number of safety points concerning
the seat belts which you should remember. This
will help to reduce the risk of injury in an
acci­

dent.
A WARNING
- The seat belts can only provide maximum
protection if the seats are adjusted properly

^>page
58, Front seats.
- To ensure proper protection, it is important
to wear the seat belts in the correct position

^>page
277, How to wear seat belts prop­

erly.
Ensure that the seat belts are worn ex­
actly as recommended in this chapter. Belts
which are
not
worn properly can increase
the risk of injury in accidents considerably.
- Do not allow the seat belt to become twis­
ted or jammed, or to rub on any sharp
edges.
- Never allow two passengers (even children)
to share the same seat belt. It is especially
dangerous to place a seat belt over a child
sitting on your lap.
275

Checking and topping up fluids
A WARNING

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- The cooling system is under pressure. Do
not unscrew the cap on the expansion tank
when the engine is hot: you could be
scal­

ded by escaping steam.
- The coolant and coolant additive can be a
health hazard. Store the coolant additive in
the original container in a safe place out of
reach of children - risk of poisoning.
- When working in the engine compartment
be aware that the radiator fan may start
running suddenly, even if the ignition is
switched off- risk of injury!
Brake fluid
© CAUTION
Do not add coolant if the expansion tank is
empty. Air could have got into the cooling
system - risk of engine damage! In this case,
do NOT drive on. Obtain professional assis­

tance.

- Have your qualified workshop check the
cooling system before the winter season to
make sure that the anti-freeze concentra­
tion is adequate for the conditions to be ex­

pected.
This applies particularly if
you
drive
into a colder climate zone.
-To prevent damage to the engine, do not
use a different type of anti-freeze additive if
the approved type of additive is not availa­

ble.
In this case use only water and bring
the coolant concentration back up to the
correct level as soon as possible by putting
in the specified additive.
- Always top up with fresh, unused coolant.
- Radiator sealants must not be added to the
coolant.

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Fig.
249 Engine compartment: Cap of brake fluid reservoir
Please refer to the safety notes
^page
295,
Working on components in the engine compart­
ment.
Checking brake fluid level
Read off the brake fluid level on the brake fluid
reservoir
^>page
297, Fig. 245. The brake fluid
level must be between the MIN and MAX marks

<=>A.

The brake fluid
level
is also automatically moni­

tored.

In right-hand drive vehicles the brake fluid reser­
voir is on the other side of the engine compart­
ment.
Changing brake fluid
Have the brake fluid changed regularly by a quali­
fied workshop.
WARNING
-If the brake fluid Level is under the MIN
mark, the effectiveness of the brakes and
therefore the safety of the vehicle may be
impaired - risk of accident! Do not drive on.
Obtain professional assistance.
- Heavy use of the brakes may cause a vapour
lock if old brake fluid is left in the system.
This would seriously impair the effective­
ness of the brakes and the safety of the car
- risk of accident!
© CAUTION
- If the brake fluid level is above the MAX
mark, brake fluid may escape via the cap on •
301

Wheels
DOT ...2216...
means, for example, that the tyre was produced
in the 22nd week of 2016.
Audi Genuine Tyres
Audi Genuine Tyres with the marking "AO" are
specially matched to your Audi. When used prop­
erly, these tyres meet the highest standards in
safety and handling. Your specialist retailer will
be glad to provide more information.
Tyre wear / damage

A
WARNING
- Use only tyre/rim combinations and match­
ing wheel bolts approved by Audi. Otherwise
damage to the vehicLe and an accident could
result.
- For technical reasons, it is not possible to
use wheels from other vehicles. In certain
cases, it is not even possible to use wheels
from another vehicle of the same model.
- It is very important to ensure that the tyres
you have chosen have adequate clearance.
When selecting replacement tyres, do not
rely entirely on the nominal tyre size
marked on the tyre; with some makes of
tyre the effective tyre size can differ signifi­
cantly from the nominal dimensions, even
though the tyres have the same size desig­

nation.
Inadequate tyre clearance can result
in damage to the tyres or the vehicle, caus­
ing a serious safety risk.
- Avoid running the car on tyres that are more
than 6 years old. If
you
have no alternative,
you should drive slowly and with extra care
at all times.
- The use of run-flat tyres on your vehicle is
NOT authorised! Unauthorised use can cause
an accident or damage your vehicLe.
- If wheel trims are fitted after the car is pur­

chased,
ensure that there is an adequate
flow of air for cooling the brakes - risk of ac­
cident!

Fig.
252 Tyre tread: Tread wear indicators
Tyre wear
Inspect the tyres regularly for damage.
- The wear on under or over-inflated tyres is
sig­

nificantly higher.
- Fast cornering, heavy acceleration and hard
braking all increase tyre wear.
- If
you
notice excessive tyre wear, have the
wheel alignment checked by a qualified work­

shop.

- Have your tyres rebalanced if steering wheel vi­
brations indicate an imbalance. Otherwise, the
tyres and other parts of the vehicLe may wear
faster.
Tread wear indicators
The original tyres on your vehicle have 1.6 mm
high tread wear indicators
^>Fig.
252 running
across the tread at regular intervals. The letters

"TWI"
or triangles on the sidewall indicate the
positions of the tread wear indicators.
The minimum tread
depth1)
is reached
at
the lat­
est when the tread is worn down to the tread
wear indicators. Replace the tyres with new ones
Changing wheels round
Wheels should be changed round regularly to en­
sure that the wear is equal on all tyres. Fit the
wheels from the rear axle on the front axle and
vice-versa. All the tyres will then last for about
the same time.

x)
Please observe the applicable regulations in the country in
which you are travelling.
306

Care of vehicle and cleaning

A.
WARNING
- Follow the rules and recommendations of
the car wash operator and do not wash the
vehicLe with the ignition switched on - risk
of accident!
- To avoid cutting yourself on sharp metal

parts,
always wear suitable protection when
cleaning the underside of the car or inside
the wheel arches.
- After the car has been washed, the full brak­
ing effect can be delayed by moisture (or in
winter by ice) on the discs and brake pads -
risk of accident! The brakes should be dried
by pressing the pedal to restore full braking
effect.
© CAUTION
- Before washing the vehicle in an automatic
car wash, please make sure to retract the
exterior mirrors to prevent damage. Always
use the electrical power controL to fold the
mirrors in/out on vehicles with electrically
retractable exterior mirrors*.
- Do not wash the vehicle in direct sunlight -
otherwise the paint can be damaged.
- Do not use insect sponges or abrasive
household sponges, etc. - they can damage
the surfaces.
- Matt-painted vehicle parts:
- Do not use polish or wax - otherwise the
paintwork can be damaged.
- Never use car-wash programmes that in­
clude wax coatings. This could spoil the
matt finish.
- Do not attach any stickers or magnet la­
bels to matt-painted parts as these could
damage the paintwork when they are re­

moved.

® For the sake of the environment
The car should only be washed in special wash

bays.
This prevents oily water from getting in­
to the public drains.

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Notes on cleaning and care
For cleaning and care of individual components
on the vehicle, please refer to the tables below.
These are recommendations only. If
you
have
Cleaning the exterior
special questions or certain components are not

listed,
please ask your qualified workshop. Please
also refer to the notes
•=> A-

Component(s) Situation
Wiper blades
Headlights/
rear lights
Sensors/
camera lenses
Wheels
Tailpipes
Ornamental trim/
mouldings
Dirt/deposits
Dirt/deposits
Dirt/deposits
Snow/ice
Road salt
Brake dust
Road salt
Dirt/deposits
Remedy

^>page
56, Cleaning the wiper blades
Soft sponge with mild
detergenta)

Sensors: soft cloth with solvent-free cleaning agent
Camera lenses: soft cloth with alcohol-free cleaning agent
Small brush/solvent-free de-icer spray
Water
Acid-free cleaning agent
Water; suitable stainless steel cleaning product if necessa­
ry
Mild
detergenta);
suitable stainless steel cleaning product
if necessary
313