2021 AUDI Q2 Cooling system

Towing a trailer
Towing a trailer
Driving the vehicle with a
trailer or caravan
Technical requirements

The
towing bracket must comply with certain
technical requirements.
Your car is intended mainly for transporting pas­
sengers and luggage. However, if suitably equip­

ped,
it can also be used to tow a trailer or cara­

van.

If the car is supplied with a factory-fitted towing
bracket it will already have the necessary techni­
cal modifications and meet the statutory require­
ments.
A 13-pin socket is provided to make the electrical
connection between the car and the trailer. If the
trailer you wish to tow has a 7-pin plug, the nec­
essary adapter cable can be obtained from a spe­
cialist retailer.
If
a
towing bracket is to be fitted after the car is

purchased,
this must be done according to the in­
structions of the towing bracket manufacturer

^page
102.
A WARNING
If
a
towing bracket is retrofitted, the installa­
tion should be carried out by
a
qualified work­

shop.

- In particular in high outside temperatures it
is not possible to drive up long steep gradi­
ents without
a
suitable cooling system. The
engine would then overheat.
- Incorrect installation can result in a safety
risk.
Points to check before towing
There are a number of points which need to be
checked before towing a trailer or caravan.

*•
Observe the maximum permitted trailer
weights
^>page
342.
Trailer weights
Never exceed the maximum permitted trailer
weights.
If
you
do not load the trailer up to the maximum
permitted trailer weight, you can then climb cor­
respondingly steeper gradients.
The maximum trailer weights listed are only ap­
plicable for altitudes up to 1000 m above sea

level.
With increasing altitude the engine power
and therefore the car's climbing ability are im­
paired because of the reduced air density, so the
maximum trailer weight has to be reduced ac­
cordingly. The weight of the car and trailer must
be reduced by about 10% for every further
1000 m (or part thereof). This figure refers to
the combined weight of the (loaded) vehicle and
(Loaded) trailer.
The figures for the draw bar weight that appear
on the identification plate of the towing bracket
are for certification purposes only. The correct
figures for your specific model, which may be
lower than these figures for the towing bracket,
are given in the registration documents and in

•=>
page 343.
Drive select*
Please note that the
efficiency*
mode is not
available in towing mode.
Exterior lights
Before starting
a
journey, make sure that all the
lights for the trailer are working properly.
Distributing the load
Distribute loads in the trailer so that heavy ob­
jects are as near to the axle as possible. Loads
carried in the trailer must be secured to prevent
them slipping. A badly distributed load can also
affect handling. This can activate the trailer sta­
bilisation feature and cause the vehicle to reduce

speed.

Where possible, operate the trailer with the max­
imum permitted draw bar weight on the ball
joint of the towing bracket, but do not exceed the
specified limit. •
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Towing a trailer

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If a towing bracket is to be fitted after the car is

purchased,
this must be done according to the in­
structions of the towing bracket manufacturer.
The towing bracket is bolted to the body at the
securing points®
^F/'g.
93.
Qualified workshops are familiar with the meth­
od of installation and any modifications which
may be required for the cooling system.

/\
WARNING
If a towing bracket is retrofitted, the installa­
tion should be carried out by a qualified work­

shop.

- A towing bracket that is not fitted properly
constitutes an accident risk.
- For your own safety, please observe the in­
structions provided by the manufacturer of
the towing bracket.
©
1
CAUTION
- If the connector socket is not fitted correct­
ly, this could cause damage to the vehicle's
electrical system.
- In particular in high outside temperatures it
is not possible to drive up Long steep gradi­
ents without a suitable cooling
system,

there is a risk of damaging the engine.
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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

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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

Fuses and bulbs
Fuses in engine compartment

Fig.
278 Engine compartment: Fuse layout

No.

Fl

F2
F3
F4

F5

F6
F7

F8

F9
F10

Fll

F12
F13
F15
F16
Electrical equipment
Electronic stabilisation control (ESC)
Electronic stabilisation control (ESC)
Engine control unit
Engine components, engine cooling, sup­
plementary heater relay coils (1+4+7),
secondary air pump relay
Engine components, tank system (diesel)
Brake Light sensor
Engine components, coolant pumps, tank
system (petrol)
Lambda probe
Engine components, exhaust flap, control
unit for automatic glow period (relay 6)
Fuel control unit, fuel pump
Supplementary heater heating rod 2
Supplementary heater heating rod 3
Automatic gearbox
Horn
Ignition coil (relay
8)

Electronic stabilisation control (ESC), en­
gine control unit (relay 5)

No.

F18
F19
F20
F22
F23
F24
F31
F33
Electrical equipment
Battery monitoring, gateway
Windscreen wipers
Anti-theft alarm system
Terminal 50, diagnostics, engine control
unit
Starter
Supplementary heater heating rod 1
Vacuum pump
Automatic gearbox, gearbox oil pump
Bulbs
General notes
Changing bulbs requires a certain degree of
practical
skill.

LED*
lights are maintenance-free and cannot be

changed.
For repairs, please contact a qualified
workshop.
If
you
decide to change bulbs in the engine com­
partment yourself, be aware of the safety risks
involved
*
A in Working on components in the
engine compartment on page 295.
WARNING
- Take particular care when working on com­
ponents in the engine compartment if the
engine is warm - risk of burns!
- Bulbs are sensitive to pressure. The glass
can break when you touch the bulb, causing
injury.
- When changing bulbs, please take care not
to injure yourself on sharp edges, in particu­
lar on the headlight housing.
© CAUTION
-Always switch off the ignition before carry­
ing out any work on the electrical system -
danger of short circuiting!
- Switch off the Lights or parking lights before
you change a bulb.
- Take good care to avoid damaging any com­
ponents.
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