brake fluid AUDI Q2 2021 Owner´s Manual

Table of Contents
Audi smartphone interface 253
Setting up
253

How to use 254
Troubleshooting 254
System settings 255
Setting the time and date 255
MMI settings 255
Connection manager 257
System update 259
On-board Handbook 260
Sound settings 260
Volume settings 261
Restarting the MMI system 262
Notes on software licences 262
Safety 263
Safe driving 263
General notes 263
Correct sitting positions 265
Child seats 267
Fitting child seats 270
Pedal area 272
Stowing luggage safely 272
Seat belts 275
Why is it so important to use seat belts? . 275
Forces acting in a collision 276
How to wear seat belts properly 277
Belt tensioners 279
Airbag system 281
Description of airbag system 281
Front airbags 282
Side airbags 285
Head-protection airbags 286
Deactivating the front passenger's airbag 288
Service and care 289
Checking and topping up fluids . 289
Fuel 289
Filling the tank 290
Selective catalytic reduction (AdBlue/
DEF) 292
Emission control systems 295
Engine compartment 295
Engine oil 297
Cooling system 299
Brake fluid 301
Battery 302
Windscreen washer 303
Service interval display 304
Wheels 305
Tyres and rims 305
Tyre pressure loss indicator 309
Care of vehicle and cleaning 312
General notes 312
Washing the vehicle 312
Notes on cleaning and care 313
Taking the vehicle out of service 317
Self-help 318
Mobility 318
General notes
318

Equipment 318
Tyre repair kit 319
Changing a wheel 321
Spare wheel 324
Jump-starting 326
Tow-starting / towing away 328
Fuses and bulbs 332
Fuses 332
Bulbs 334
Changing headlight bulbs 336
Changing bulbs for rear lights 339
Technical data and accessories .. 340
Accessories and modifications
to the vehicle 340
Accessories, replacement parts and
repairs 340
Modifications 340
Radio transmitters and business
equipment 340
Technical data 342
Vehicle identification data 342
Explanation of technical data 342
Dimensions 343
Capacities 343
Weights 343
Engine data 344
4

Instruments and controls

B

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Fuel tank system

^page
35
Washer fluid level

^>page
35

1
Windscreen wipers

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35

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Remote control key*

^>page
77
Driver's
door*

Opage
35
Battery in remote control key

^>page
38
Bulb monitor*

•=>
page 35
Headlight range control*

^>page
35

HP 1
Adaptive light*

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AdBlue^

£2

Light sensor/rain sensor*

^>page
36
Gearbox (automatic gearbox)

^page
92,
Clutch (manual gearbox)

^>page
32
Steering lock

^>page
32
Engine start system

^>page
32
Electro-mechanical power steering

<=>page
148
Suspension control*

opage
36
Active lane assist*

\^>page
124
Side assist*

^>page
131
Pre sense*

^>page
122
AdBlue*

opage
292
AdBlue*

<^>page
292
28
Further indicator lamps

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Turn signals

^>page
36
Trailer turn signals*

^>page
36
Rear seat belt*
/
<3page
31
Cruise control system*

^>page
104
Speed Limiter*

ï>page
106
Adaptive cruise control*

^>page
113
Adaptive cruise control*

^>page
113
Adaptive cruise control*

^>page
113
Adaptive cruise control*

^>page
114
Active lane assist*

^>page
124
Hold assist*

^>page
84
Start/stop system*

<^page
79
Start/stop system*

^•page
79
Convenience key*

^page
79
Engine start system

<=>page
32
Gearbox

ï>page
92
Electro-mechanical parking brake

^>page
30
Electro-mechanical parking brake

^>page
30
Hold assist*

^>page
84

Instruments and controls

^^

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Hill hold assist

^>page
33
Rear seat belt
/
^>page
31
Rear seat belt
/
^>page
31
Child lock
(electric)*

cépage
46
AdBlue*

^page
292

Kfl I ^
page 122
Rest recommendation*

^>page
110
Speed warning function*

cépage
104
Cruise control system*

^>page
104
Speed limiter*

^>page
106
Park assist*

^>page
139
Park assist*

^>page
139
Adaptive cruise control*

^>page
114
Adaptive cruise control*

tapage
114
Active Lane assist*

tapage
124
Side assist*

tapage
131
Pre sense*
Camera-based traffic sign recogni­

tion*

^>
page 108
Main beam assist*

^>
page 50
Main beam headLights

Pipage
50
(©) Brake system
If the warning Lamp Lights up, there is a fault in
the brake system.
| Stop vehicle and check brake fluid level
Stop the vehicle and check the brake fluid level.
Obtain professional assistance if necessary.
| Warning! Brake servo inoperative!
You need to apply much more force to operate
the brakes if the brake servo fails. Obtain profes­
sional assistance.
| Brakes: fault. Safely stop vehicle
If the warning lamp lights up and the message
appears, there is a fault in the brake servo.
If the ABS indicator lamp
[g]
and ESC indicator
lamp
I^J
light up together with the brake warn­
ing
Lamp||
and this driver message appears,
the ABS, ESC and brake force distribution sys­
tems have failed
•=> A-

Do not drive on. Please seek professional assis­
tance
^A-

| Parking brake system fault! See owner's
manual
- If the warning lamp and the message appear
after you switch on the ignition when the ve­
hicle is stationary, please check whether you
can release the parking brake. If the parking
brake cannot be released you should obtain
professional assistance. If the parking brake
can be released but the message
stilL
appears,
drive to a qualified workshop without delay and
have the fault rectified.
- If the warning lamp and the message appear
while driving, there may be a malfunction in
the parking brake auto release or the emergen­
cy brake functions. You may not be able to ap­
ply or release the parking brake. Do not park
the car on a gradient. Obtain professional assis­

tance.

Brake servo: restricted. You can continue driv­

ing.
Please contact workshop
There is a fault with the brake servo. The brake
servo remains available with reduced capacity.
29

Instruments
and
controls
The brakes
may
perform differently than usual
and
the
brake pedal may vibrate.
Drive
to
a qualified workshop without delay
and

have
the
fault rectified.
A WARNING
- Before opening
the
bonnet and checking
the

brake fluid level, observe
the
warning infor­
mation
on
*$page
295,
Working
on
compo­
nents
in the
engine compartment.
-
If
the brake warning lamp does
not go out,

or
if it
lights up when driving,
the
brake
flu­

id level in
the
reservoir
is too low -
this
may

cause an increased accident risk. Stop
the

vehicle and
do not
drive on. Obtain profes­
sional assistance.
-
If
the brake warning lamp lights
up
togeth­
er with
the
ABS indicator lamp and
the
ESC
indicator lamp, this can mean that
the
con­

trol function
of
the ESC/ABS
is not
working.
Input from
the
functions that stabilise
the

vehicle
is no
longer available. This could
cause
the
tail of
the vehicle
to
skid
side­

ways.
Do not
drive on. Obtain professional
assistance.

(®)/0
Electro-mechanical parking brake
The warning lamp
||
lights
up
when
the
parking
brake
is
applied.
If the warning lamp
||
flashes, insufficient brak­
ing force
has
been applied
or
released. Select
first gear (manual gearbox)
or
position
P
(auto­
matic gearbox)
as an
additional safeguard. Make
sure that
the
warning lamp has gone
out
before
you drive
off.

2J
Parking brake!
There
is
a malfunction
in the
parking brake. Drive
to a qualified workshop soon
and
have
the
fault

rectified.

[ft]
Parking brake auto release: unavailable
If this message appears, press
the
brake pedal
and then release
the
parking brake.
If the warning lamp flashes and
the
message
ap­

pears,
the
brake
may not be
strong enough
to

hold
the
vehicle. The brakes have overheated.
The vehicle can roll away, even
on a
gentle slope.
©J Parking brake is applied
If this message appears, press
the
brake pedal
and then reLease
the
parking brake
as
necessary.
For further information
on the
parking brake
refer
to
^>page
82.

•as
Cooling system

| Switch
off
engine and check coolant level.
See owner's manual
The coolant level
is too low.

Switch
off
the engine and
do not
drive on. Check
the coolant level
^>page
299.

-
If
the coolant level
is too
low, add more coolant

^>page
300. Do not
drive
on
until
the
warning
lamp has gone
out.

| Coolant temperature too high! Let engine
run with vehicle stationary
Let
the
engine cool down
by
running
it at
idling
speed
for
a
few
minutes until
the
warning lamp
goes
out.

-
Do not
drive
on if
the warning lamp does
not

disappear. Obtain professional assistance.

JgJ
Caution:
Vehicle parked
too
steep
A WARNING
- Never open
the
bonnet
if
you
can see
or
hear
steam
or
coolant escaping from
the
engine
compartment; there
is
a risk
of
being
scal­

ded.
Wait until you
can no
longer see
or

hear escaping steam
or
coolant.
-The engine compartment
of
any motor
vehi­

cle
is
a dangerous place. Before carrying
out

any work
in the
engine compartment, switch
off the engine and allow
it to
cool down.
Please observe
the
important safety warn­
ings
^>page
295,
Working
on
components
in
the
engine compartment.
30

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

Checking and topping up fluids

CO

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Emission controL
systems
Catalytic converter
Applies to: vehicles with petrol engine
The vehicle must only be used with unleaded pet­

rol,
otherwise the catalytic converter will be ir­
reparably damaged.
Never allow the fuel tank to run completely dry,
as the irregular supply of fuel can cause misfir­

ing.
This allows unburnt fuel to enter the exhaust

system,
which can cause overheating and dam­
age to the catalytic converter.
Diesel particulate filter
Applies to: vehicles with diesel engine
The diesel particulate filter can filter out almost
all soot particles contained in the exhaust gas. In
normal driving conditions the filter is self-clean­

ing.
Should the self-cleaning function of the filter
not be able to operate, e.g. when the vehicle is
continuously used only for short trips, the filter
becomes obstructed with soot and the indicator

lampnf°r
the
diesel particulate filter Lights up

cépage
34.
A WARNING
The exhaust system is very hot when the
vehi­

cle is being driven and after the engine has
been switched off.
- Never touch the tailpipes when they are hot
- risk of burns!
- Because of the high temperatures which can
occur in the emission controL system, do not
park the vehicle where the exhaust can
come into contact with flammable materials
under the car (e.g. on grass or at the forest
edge) - risk of fire!
- Do not apply any underseal agents in the
area around the exhaust system - risk of

fire!

Engine compartment
Working on components in the engine
compartment
Extra caution is necessary when working on com­
ponents in the engine compartment.
Always be aware of the danger of injury and
scalding as well as the risk of accident or fire
when working in the engine compartment (e.g.
when checking and refilling fluids). Always ob­
serve the warnings listed below and follow all
normal safety precautions. The engine compart­
ment of any motor vehicle is a potentially haz­
ardous area
oA-

A WARNING
- Switch off the engine.
-Switch off the ignition.

-Applythe
parking brake.
- On vehicles with manual gearbox place the
gear lever in neutral, on vehicles with auto­
matic gearbox move the selector lever to
position P.
- To avoid the risk of being scalded, never
open the bonnet if
you
see steam or coolant
escaping from the engine compartment.
Wait until no steam or coolant can be seen
before opening the bonnet.
- Wait for the engine to cool down.
- Keep children away from engine compart­
ment.
- Never spill fluids on a hot engine. These
flu­

ids can cause a fire (e.g. radiator
anti­

freeze).
- Take care not to cause short circuits in the
electrical system.
- 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!
- Do not unscrew the cap on the expansion
tank when the engine is hot. The cooling
system is under pressure.
- Protect face, hands and arms by covering
the cap with a large, thick rag to protect
against escaping coolant and steam.
295

Checking and topping up fluids
A WARNING
- To avoid the risk of being scalded, never
open the bonnet if
you
see steam or coolant
escaping from the engine compartment.
Wait until no steam or coolant can be seen
before opening the bonnet.
- For safety reasons the bonnet must always
be completely closed when the vehicle is

moving.
After closing it always check that it
is properly secured. It should not be possi­
ble to
lift
the front edges of the bonnet.
Should you notice that the bonnet is not
safely secured when the vehicle is moving,
stop the vehicle immediately and close the
bonnet properly, otherwise it could cause an
accident.
Engine compartment layout
Main components for checking and refilling

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Fig.
245 Typical locations of fluid containers, engine oil dipstick and engine
oilfiller
cap

(T)
Coolant expansion tank
C=t)
<^page
300
(2) Engine oil dipstick
Opage
298
(3) Engine
oilfiller
cap
(*&*)
Opage
298
(4) Brake fluid reservoir (CO))
^>page
301
(5) Vehicle battery (+) beneath a cover

^page
303,
^page
326
(?) Earth
point
on
body
(-)•=>page
303,

^>page
326
(7) Windscreen
washer
container
(<3?)
^>page
303

(§)
Fuse box
^page
332
The positions of the oil
dipstick
(2) and the en­
gine
oilfiller
cap(D^F/'g.
245 may be different
on some engine versions.
Engine oil
Choosing the correct engine oil grade
The service interval display in the instrument
cluster of your vehicle will inform you when it is
time for an oil change. We recommend having
the oil changed by
a
qualified workshop. •
297

Checking and topping up fluids
A WARNING

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00
- 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

Checking and topping up fluids
the reservoir in certain circumstances and
cause damage to the vehicle.
- Brake fluid must not be allowed to come in­
to contact with the vehicle's body, other­
wise it will attack the paintwork.

©
For the sake of the environment

1?
Batteries contain toxic substances including
sulphuric acid and
lead.
PLease contact a
qualified workshop if
you
have any questions.
Battery
General warnings for batteries
Because of the complexity of the power supply,
any battery work, such as disconnection, replace­
ment, etc. must be carried out by
a
qualified
workshop
^A-

The term "vehicle battery" refers to the 12 Volt
battery in your vehicle.
Explanation of warnings on vehicle battery:

m

Wear safety glasses!
Battery acid is extremely corrosive. Wear
protective gloves and safety glasses.

A

Keep open flames, sparks, uncovered
Lights and lit cigarettes away from the
battery!
A highly explosive mixture of gases may

~\
be given off when the battery is under
charge!
Keep children away from batteries and
battery
acid.

A WARNING
Any work on the batteries and electrical sys­
tem in your vehicLe entails a risk of injury and
chemical burns in addition to danger of
acci­

dent or fire. For this reason, you must have
the work carried out by a qualified workshop.
©
CA UTION

If the car is left standing for long periods,
protect the battery from frost. The battery
will be damaged irreparably if it is allowed to
freeze
^>page
303, Charging the vehicle
bat­

tery.

Vehicle battery

The
term "vehicle battery" refers to the 12 Volt
battery in your vehicle.
If the vehicle is not used for long periods
If
you
do not drive your vehicle for a period of
several days or weeks, the power management
will gradually shut off the on-board systems one
by one, or reduce the amount of current they are

using.
This limits the amount of power consumed
and helps to ensure reliable starting even after a
long period
^>page
149. Certain convenience fea­

tures,
such as interior lighting or electric seat ad­
justment, may not be available. These functions
will be restored when you switch on the ignition
and start the engine.
Even though some systems are deactivated auto­
matically, certain electrical equipment continues
to draw current even when the ignition is off. If
the vehicLe is left standing for long periods, this
can result in total battery discharge. If the
vehi­

cle battery is allowed to discharge completely, an
internal
chemicaL
reaction damages the battery
irreparably. To avoid this, the vehicle battery
should be recharged at Least once a month

^>page
303. PLease contact a qualified workshop
if
you
have any questions.
Winter conditions
Cold weather is very hard on the vehicle battery.
The starting capacity may be reduced as a result.
For this reason, you should have the vehicle bat­
tery checked by
a
qualified workshop before the
start of winter.
302

Index
Personal hotspot 195
Setting up 196
Setup 191
Topping up data plan 197
Audi drive select 131
Audi magnetic ride
see Suspension control
131

Audi music interface 240
Audi music stream
see Wi-Fi 238
Audio files 243
Audio players
Bluetooth audio players 237
Wi-Fi audio players 238
Audio track 246
Audi phone box 177
Audi pre sense 120
Driver messages 119, 122
Settings 122
Audi side assist 127
Cleaning sensors 313
Driver messages
131

Rear cross-traffic assist 130
Audi smartphone interface 253, 258
Audi virtual cockpit
see Instrument cluster 12
AUTO
Automatic air conditioner 69
Automatic headlights 49
Auto Lock (central locking system) 37
Automatic air conditioner
see Air conditioner (automatic) 66, 69
Automatic gearbox 85
Back-up programme 92

DownhilL
speed control 89
Driving tips 88
Kick-down 90
Launch control programme 91
Malfunction 86
Manual gear selection (tiptronic mode) ... 90
Manual release of selector Lever (left-hand
drive) 93
Manual release of selector Lever (right-hand
drive) 94
Paddle levers 90
Selector lever 88
Selector lever Lock 86
Selector lever positions 86
AUX input
241,
242
Average fuel consumption 19, 20
Average speed 19, 20
Axle loads 343
B
BACK button 152
Background lighting 53
Balance (sound) 260
Bandages
see First-aid kit 318
Bass box 325, 326
Bass (sound) 260
Battery 302
Charge 149
Charging 303
In key 38
Winter conditions 302
Battery, charging (mobile devices) 177
Belts
see Seat belts 275
Bicycle racks (rear carrier systems) 99
Biodiesel 289
Bioethanol (fuel) 289
Blower
Automatic air conditioner 70
Heating/ventilation system and manual air
conditioner 67
Bluetooth
Audio players 237
Connecting a mobiLe phone 173
Remote SIM Access Profile 193
Settings 258
Boot
see Luggage compartment 272
Boot lid
Close button 44

Opening/dosing
electrically 44
Brakes 147
Brake assist system 145
Brake fluid 301
Brake pedal 272
Electro-mechanical parking brake 82
346