page 51 AUDI Q2 2021 Owner´s Manual

Checking and topping up fluids

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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
If
you
have to top up the oil between oil changes,
use the grades of oil specified in the table in ac­
cordance with VW standards.
You will need to know whether
- the vehicLe is being serviced based on the
flexi­

ble or fixed oil change service (see last service
record).
- the vehicle has a petrol or diesel engine (see
sticker on inside of fuel tank flap).
Petrol engines
Diesel engines
Oil Change Service
Flexible
VW 504 00
VW 507 00
Fixed
VW 502 00
With diesel
particulate
fil­

ter:
VW 507 00
Without diesel
particulate
fil­

ter:
VW 505 00
Audi recommends

ÇÇastrol
(MMMM'
FriOFSSskimL

Audi recommends LongLife high-performance
engine oil from Audi Genuine Parts
© Note
If the oil grades specified in the table are not
available, you can use one of the
folLowing

grades as a substitute. To prevent damage to
the engine, this should not be done more
than once between oil changes and no more
than 0.5 litres should be used.
- Petrol engines: ACEA A3 or API SN (API SM)
standard
- Diesel engines: ACEA C3 or API CJ-4 stand­
ard
© Note
The flexible oil change service is not available
for all models in all countries.
Checking and topping up the engine oil
level

The
oil dipstick differs depending on the type of
engine.

Fig.
246 Oil dipstick (examples): Checking engine oil level

Fig.
247 Engine compartment: Engine oil filler cap
(exam-

pLe)
Please refer to the safety notes
opage
295,
Working on components in the engine compart­
ment.
Checking engine oil level
- Park the vehicle on a level surface.
- Switch off the warm engine. Wait for
a
few mi­
nutes for the oil to drain back into the sump.
- Open the bonnet
opage
296.
-
PuLl
out the oil dipstick
^>page
297, Fig. 245,
wipe it with a clean cloth and insert it again,
pushing it in as far as it will go.
- Then pull the dipstick out again and check the
oil level
•=>
table on page 299.
- If the oil level is too Low, add more engine oil.
298

Checking and topping up fluids

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Markings on oil dipstick
^>Fig.
246

®

CD

(D

0
When the oil level is near the marking
(Î)

you must top up the engine oil. Please refer

to-=>®.

Do NOT add engine oil.
Do NOT add engine oil.
Drive to a qualified workshop without delay
and have the engine oil changed
•=>©.

Topping up the engine oil
- Unscrew the cap
"fc^
^>Fig.
247 from the
oilfill­

er opening
^>page
297, Fig. 245.
-Carefully add 0.5 Litres of suitable engine oil

^>
page 297.
- After two minutes check the oil level once

again.

- If the oil level is too low, add a smaller quantity
of engine oil. The level must always be below
the marking (5)
<^Fig.
246
<=>©.

- Screw the oil filler cap
*£/;
back on and push
the dipstick all the way in.
A WARNING
- Ensure that no engine oil comes into contact
with hot engine components when topping

up:
this could cause a fire.
- The oil filler cap must be properly closed to
prevent oil from squirting onto the hot en­
gine or exhaust system while the engine is
running - risk of fire!
- Wash your skin thoroughly if it comes into
contact with engine oil.
- The engine oil must never drop below the
marking®
^>Fig.
246- risk of engine dam­

age!

- When topping up the engine oil, make sure
that the oil level is not above the marking

@
^Fig.
246, as this may result in damage
to the catalytic converter or to the engine.
Do NOT start the engine. Contact a qualified
workshop to extract the engine oil if neces­
sary.
- Applies to vehicles which have an oil
dip­

stick with area
(3)^
Fig. 246: If you run your
vehicle on diesel fuel of poorer quality than
EN 590 standard
fuel,
the fuel can get into
the engine oil. In this case, the oil level
gradually rises and the quality of the engine
oil decreases. Once the oil level has reached
the marking
@
or the indicator lamp
E

has come on, the engine oil level must not
be corrected by extracting the surplus oil -

risk
of engine damage! The engine oil must
be changed
^>page
34.
- No additives should be used with engine oil.
Any damage caused by the use of such
addi­

tives would not be covered by the factory
warranty.
© For the sake of the environmen
- Never pour engine oil down drains or into
the ground.
-Always observe statutory requirements
when disposing of empty oil canisters.
© Note
Depending on
how
you drive and the condi­
tions in which the car is used, oil consumption
can be up to 0.5
Itr./lOOO
km. Oil consump­
tion is likely to be higher for the first 5,000

km.
The engine oil Level must be checked at
regular intervals, preferably when refuelling
and before setting off on a long trip.
Cooling system
Coolant
The engine cooling system is filled at the factory
with a mixture of conditioned water and coolant
additive. This coolant must not be changed.
The coolant level is monitored by a warning lamp
|
<^page
30. However, we recommend that it
should be checked occasionally.
If you do need to top up the coolant, use a mix­
ture of water and coolant additive. We recom­
mend mixing coolant additive with distilled wa­
ter.
299

Checking and topping up fluids
Coolant additive
The coolant additive contains anti-freeze and cor­
rosion protection agent. Only use one of the
fol­

lowing coolant additives. It is possible to mix
these additives.
Topping up coolant
Coolant additive
G13
G12++
Specification

TL774J

TL 774
G

The amount of coolant additive which needs to
be mixed with the water depends on the temper­
atures to be expected in the winter season. If the
anti-freeze concentration is too Low, the coolant
can freeze and cause engine damage.
Hot regions
Cold regions
Coolant
additive

min.
40%
max. 45 %

min.
50%
max. 55 %
Frost protec­
tion

min.-25°C

max. -40 °C

(T)
CAUTION
- 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.

Fig.
248 Engine compartment: Markings on coolant ex­
pansion tank
Please refer to the safety notes
^page
295,

Working on components in the engine compart­
ment.
Checking coolant level

•
Park the vehicle on a level surface.

•
Switch off the ignition.

•
Read off the coolant level on the coolant ex­
pansion tank
^>Fig.
248. When the engine is

cold,
the coolant level should be between the
marks. When the engine is warm, it may be
slightly above the top mark.
Topping up coolant
Important: The coolant expansion tank must not
be empty
•=>([).

•
Wait for the engine to cool down.

•
Cover the cap on the expansion tank with a

cloth,
and carefully unscrew the cap
anti-clock­

wise
<=>
/K.

*-
Add coolant in the correct concentration

tapage
299 up to the top mark.

•
You should make sure that the fluid level re­
mains stable. If necessary, add more coolant.

•
Screw the cap on again tightly.
Any loss of coolant normally indicates a Leak in
the cooling system. Drive to a qualified workshop
without delay and have the cooling system

checked.
If there are no leaks in the system, a
loss of coolant can only occur if the coolant boils
and is forced out of the system as a result of
overheating.
300

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.

ëB

k
DOT
4
A

•9
o
o
:>
li-

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

Checking and topping up fluids
Charging the vehicle battery

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Fig.
250 Engine compartment: Terminals for jump leads
and battery charger
Please refer to the safety notes
^>page
295,
Working on components in the engine compart­
ment.
Important: Only use chargers with a maximum
charge voltage of 14.8 V (the battery cables do
not have to be disconnected).
The battery is Located in the engine compart­
ment. The earth
point 0
is always on the
vehi­

cle's body.

•
Note the warnings
•=>/^
in General warnings
for batteries on page 302 and
Q/\.

•
Switch off all electrical equipment and the
igni­

tion.

•
Open the bonnet
^>page
296.

•
Open the battery cover
^Fig.
250.

•
Connect the charger cables to the positive ter­
minal (+) and the earth point on the body (-)
(not the negative terminal on the battery) as

specified.

•
Connect the battery charger to the mains and
switch it on.

•
After charging the battery: switch off the bat­
tery charger and disconnect the mains cable.

•
Detach the charger cables from the terminals.

•
Fold the cover back onto the battery in its cor­
rect position.

•
Close the bonnet
^>page
296.
A WARNING
- A highly explosive mixture of gases may be
given off when the battery is under charge.
Only charge the vehicle battery in a well
ventilated area.
- When it is discharged the vehicle battery
can freeze at temperatures around 0°C. You
must not use a vehicle battery which has

frozen,
even after it has thawed, because
the ice may have cracked the battery casing
and allowed the battery acid to escape - risk
of explosion and chemical burns! Please
contact
a
qualified workshop if
you
have any
questions.
- Do not connect or disconnect the charging
cables during the charging process - risk of

explosion!

© Note
- Use only the terminals in the engine com­
partment to charge the vehicle battery.
- Before you charge the vehicle battery, al­
ways read and follow the manufacturer's in­
structions for using the battery charger.

Wind
screen washer

Fig.
251 Engine compartment: Cap of windscreen washer
container
Please refer to the safety notes
^>page
295,
Working on components in the engine compart­
ment.
The container for the windscreen washer
&
con­

tains the cleaning fluid for the windscreen, the
rear window* and the headlight washer system*

Opage
297, Fig. 245.
For
the container capacity,
please refer to
opage
343.
Clean water should be used when topping up. If
possible, use soft water to prevent scaling on the
washer
jets.
Always add washer fluid to the wa­
ter. In cold weather you should add anti-freeze to
the water to prevent it from freezing. •
303

Wheels

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On tyres with a directional tread pattern, note
the direction of rotation indicated on the sidewall

opage
324.
Concealed damage
Damage to tyres and rims is often not readily
visi­

ble.
If you notice unusual vibrations
or
the car
pulling to one side, this may indicate that one of
the tyres is damaged. Reduce your speed imme­
diately. Inspect the tyres for damage. If no exter­
nal damage is visible, drive slowly and carefully
to the nearest qualified workshop and have the
car inspected.
A WARNING
Insufficient tread depth or different tread
depths on different wheels reduce safety. This
is particularly evident in vehicle handling,
when there is a risk of aquaplaning in deep
puddles of water and when driving through
corners. Braking is also adversely affected -
risk of accident!
Tyre pressure

<S>

®-

CGOO
Audi

SO)

EÛ

T—

Fig.
253 End face of driver's door: Sticker listing the tyre
pressures
The correct inflation pressures for tyres fitted at
the factory and for the compact temporary spare

wheel*
are specified on a sticker. The sticker

<=>Fig.
253 is on the end face of the driver's door.

(A)
Tyre size

(B)
Tyre pressure for the front wheels

©
Tyre pressure for the rear wheels

©
Tyre pressure if vehicLe is partially Loaded

(2)
Tyre pressure (comfort setting)* if vehicle is
partially loaded (not available on all vehicles) If a
maximum speed is given, it must not be excee­

ded.

(3) Tyre pressure if vehicle is fully loaded
(4) Tyre pressure for the compact temporary
spare wheel*
If you intend to drive the vehicLe with a partial
load (no more than three people travelling in the
vehicle), select the specified tyre pressure
©.

However, if you prefer an extra-smooth
ride
you
can select the comfort setting* (2). Should you
wish to drive with a full
load,
you must increase
the tyre pressure to the specified maximum (3)
Checking / adjusting the tyre pressures

•
Check the tyre pressures at least once a month

and,
in addition, before starting a long journey.

•
The tyre pressures should only be checked
when the tyres are cold. The slightly raised
pressures of warm tyres must not be reduced.

•
Refer to the sticker
•=>
Fig. 253 for the correct
tyre pressures according to the load the vehicle
is carrying.

•
If necessary, adjust the tyre pressure.
• Applies to vehicles with tyre pressure loss
indi­

cator : Store the new tyre pressures

^>page
311.
• Check the pressure of the spare
wheeLVcom-

pact temporary spare wheel*. Keep the spare
tyre inflated to the highest pressure approved
for the tyre.
WARNING
Always adjust the tyre pressures to match
your driving style and the load the vehicle is

carrying.

- Excessive Loads can cause you to Lose control
of the vehicle - risk of accident!
- Under-inflated tyres flex more and can over­
heat at high speeds or when the vehicLe is
carrying a heavy Load. This could cause a
tyre blow-out and you could lose control of
the vehicle - risk of accident!
307

Wheels
- Incorrect tyre pressures increase tyre wear
and adversely affect vehicle braking and
handling - risk of accident!
(7) CAUTION
Replace any lost valve caps to prevent dam­
age to the tyre valves.

(#) For
the sake of the environment
- Under-inflated tyres will increase the fuel
consumption.
- Driving with the tyre pressures adjusted to
the comfort setting* may also result in in­
creased fuel consumption.
©
We recommend always using the tyre pres­
sure setting
(T)
for partial loads and the set­
ting
(?) for
full loads.
Wheel bolts and rims
Wheel bolts
The wheel bolts should be clean and turn easily.
A special adapter is required to turn the
anti-

theft wheel bolts*
^
page 321.
Rims
Rims with a bolted rim flange* or bolted trim

parts*
consist of several components. A special
technique is applied to bolt these components
together. Never attempt to repair or dismantle
them
o
A-

A,
WARNING
If the wheel bolts have not been tightened or
serviced correctly, they can come loose, and
you could lose control of the vehicLe - risk of
accident! For the correct tightening torque,
refer to
^page
324, After changing a wheel.
- Make sure that the wheel bolts and threads
in the wheel hubs are always clean and free
from grease.
- Only use wheel bolts that are designed to
match the rims on your car.
- Always have damaged rims repaired by a
qualified workshop. Never attempt to repair
or dismantle rims yourself - risk of accident!
Winter tyres
In winter road conditions winter tyres will consid­
erably improve the car's handling. Due to their
type of construction (width, rubber compound,
tread pattern), summer tyres give less grip on ice
and snow.

•
Winter tyres must be fitted on all four wheels.

•
Only use winter tyres of the correct type ap­
proved for your vehicle.

•
Please note that the maximum permissible
speed for winter tyres may be lower than for
summer tyres
•=> A-
Your specialist retailer can
advise you of the maximum speed
for
your

tyres.

•
After fitting the wheels you must always check
the tyre pressures
^>page
307.
Winter tyres Lose their effectiveness when the
tread is worn down to a depth of 4 mm. The per­
formance of winter tyres is also severely impaired
by ageing, even if the tread is still much deeper
than 4 mm.
A WARNING
- Never exceed the maximum approved speed
for your tyres. This causes the tyres to over­
heat and can even result in a blow-out - risk
of accident!
- Always adapt your driving style to the pre­
vailing road and traffic conditions. Drive
carefully and reduce your speed on icy or
slippery roads. Even winter tyres lose their
grip on black ice.

(^)
For the sake of the environment
Summer tyres should be fitted again as soon
as possible; they give better handling on
roads which are free of snow and ice. They are
quieter, do not wear so quickly and reduce
fuel consumption. •
308