2015 AUDI S3 ECU

226 Checking and Fill in g
- Do not add any type of radiator leak sea l­
ant to your ve hicle's engine coolant.
Adding rad iator repair fluid may adverse­
ly affect the function and performance of
your cooling system and could result in damage not covered by your New Vehicle
Limited Warranty.
Adding coolant
Fig . 164 Engine co mpa rtment: mark in gs on the coo l­
ant expans ion tank
R ea d a nd f ollow ing th e W ARNING S before
checking anything in the eng ine compartment
¢ page 217.
Ch eck ing t he e ngi ne coolant level
"Park your vehicle on a level surface .
.. Switch the ign ition off .
" Read the coo lant level on the coolant expan­
s ion tank ¢
fig. 164. The coo lant level must
be between the markings when the eng ine
in cold. When the engine is warm it can be
sl ightly above the upper marking .
Adding coolan t
Requirement : There must be a residual
amount of coolant in the expansion tank ¢(D .
.. Let the engine cool down.
" Place a cloth over the coolant expansion
tank cap and unscrew the cap counterclock­
wise ¢&_ .
.. Add coolant mixed in the correct ratio
¢ page 225 up to the upper marking.
.. Make sure that the fluid level remains sta­
ble. Add more coolant if necessary.
" Clove the cap securely. A coolant loss suggests a
leak. Immediately
drive your vehicle to an authorized repair fa­
c ility and have the cooling system inspected.
If the cooling system is not leaking, a loss can
come from the coolant boiling through over­
heating and being pushed out of the cooling
system.
A WARNING
The cooling system is press urized and can
become very hot. To reduce the r isk of
b urns from hot coolant:
- Do not open the coolant expansion tank
cap with the engine ho t. T here is a risk of
burns.
- Stop the eng ine and a llow it to cool.
- Protect your face, hands and arms from
escaping coolant and steam by covering
the coolant tan k cap with a large, th ick
cloth.
- Turn the coolan t tank cap counterclock­
wise slowly and keep light pressure on
the cap .
- To reduce the risk of burns, do not allow
any antifreeze or coolant to drip onto the
exhaust system or hot engine compo ­
nents. The ethy lene g lycol in engine
coo lant can catch fire under certain cir­
cumstances.
- The coolant additive and the coolant can
be dangerous to your health . For this
reason, keep the coo lant in the origina l
container away from ch ildren . There is a
risk of poisoning.
- When working in the engine compart­
ment, remember that the rad iator fan
can switch on even if the ignition is
sw itched off, which increases the risk of
pe rsonal injury.
(D Note
Do not add coolant if the expansion tank is
empty . Air could enter the cooling system
and damage the eng ine .
If this is the case,
do no t continue dr iving. See a n author ized
A udi dealer or authori zed Aud i Service Fa­
cility for assist ance.

248 Tires and wheels
also lead to sudden tire fail­ure, including a blowout
and sudden deflation, caus­ ing loss of vehicle control.
-The driver is responsible for the correct tire pressures for
all tires on the vehicle. The
applicable pressure values
are located on a sticker on
the driver's side B-pillar.
-Only when all tires on the vehicle are filled to the cor­
rect pressure, the tire pres­
sure monitoring system can
work correctly.
-The use of incorrect tire
pressure values can lead to
accidents or other damage.
Therefore it is essential that
the driver observe the speci­
fied tire pressure values for
the tires and the correct
pressures for the function of
the tire pressure monitoring
system.
-Always inflate tires to the recommended and correct
tire pressure before driving off.
- Driving with underinflated
tires bend more, letting
them get too hot resulting
in tread separation, sudden tire failure and loss of con­
trol.
-Excessive speed and/over­
loading can cause heat
build-up, sudden tire failure
and loss of control.
-If the tire pressure is too
low or too high, the tires
will wear prematurely and the vehicle will not handle
well.
-If the tire is not flat and you
do not have to change a
wheel immediately, drive at
reduced speed to the near­
est service station to check
the tire pressure and add air
as required.
(D Note
Driving without valve stem
caps can cause damage to
the tire valves . To prevent
this, always make sure that
factory installed valve stem caps on all wheels are secure­ly mounted on the valve.
@ For the sake of the environment
Underinflated tires will also
increase the fuel consump­
tion .

26 2 T ire s and wheel s
loss of control, crashes and serious per­
sona l injuries. Have worn or damaged tires
replaced immediate ly.
- Winter tires have maximum speed rat ing
that may be lower than your veh icle's
maximum speed .
- Never drive faster than the speed for
wh ich the winter or other tires installed
on your vehicle are rated.
A WARNING
Always adjust your driving to the road and traffic conditions. Never let the good ac­
celeration of the winter tires and all-wheel
drive tempt you into taking extra r is ks. A l­
ways remember:
- When brak ing, an a ll-wheel d rive vehicle
hand les in the same way as a front drive
vehicle .
- Drive carefu lly and reduce your speed on
icy and slippery roads, even winter tires
canno t he lp under blac k ice condit ions.
@) For the sake of the environment
Use summe r tires when weathe r cond i­
tions perm it. They are quieter, do not wea r
as quickly and red uce f ue l cons umption.
Snow chains
Snow chains may be fitted on ly to the front
wheels, and only to certain tire sizes . Ask you r
authorized Audi dealer on which tire sizes
snow chains can be used.
I f you are going to use snow chains, then you
must install them on the front wheels at
l east.
The snow chains must h ave low-profi le links
and must not be thicker than 0 .53 inch
(13 .5 mm), including the lock.
Remove wheel ce nte r covers a nd tr im dis cs
be fore putting snow chains on yo ur vehicle
q0 . For sa fety reasons cover caps must then
be fitted over the whee l bolts. These are avai l­
ab le from authorized Audi dea lers.
A WARNING
Using the wrong snow chains for your veh i­
cle o r instal ling them incorrect ly can in­
crease the risk of loss of cont ro l leading to
se rious pe rsonal injury .
- Snow chains are available in different
sizes . Always make sure to follow the in­
structions p rov ided by t he snow cha in
manufac turer.
- When driving with snow cha ins never
d rive faster than the speed permitted for
your specific snow chains.
- Always observe local regulations.
@ Note
- Remove snow chains before dr iv ing o n
roads not covered with snow to avoid
damaging tires and wea ring the snow
chains dow n un necessa rily .
- Snow chains, which come into direc t con­
tact with the whee l rim, can scrat ch or
damage it. Therefo re, make sure that the
s now chains are s uitably covered. Check
t he pos ition of t he snow chains after
driving a few yards and correct if neces ­
sary. Follow the inst ructions from the
snow chain man ufacturer when do ing so.
@ Tips
Where snow chains are mandatory on cer ­
tain roads, th is normally a lso applies to
vehicles with a ll-wheel drive .
Wheel bolts
Wheel bolts must always be tightened to the
correct torque .
The design of w heel bol ts is matched to the
f ac tory installed rims. If different rims are fit­
ted, the co rrect wheel bo lts with the right
l ength and correctly shaped bolt heads must
be used. Th is ensures that wheels are fitted
securely and that the brake system functions
correct ly . .,..

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What do I do now? Luggage compartment
lid emergency release
In case of an emergency, the rear lid can be
opened from the inside using the trunk es­
cape handle .
Fig. 174 Section of the luggage compartm en t: access
to the emergency release
To reach the emergency release mechanism,
the rear bench seat backrest must be folded
down .
~ page 65
.,. Push the latch upward in the direction of the
arrow until the lock releases .
The trunk escape handle inside the rear lid is
made of fluorescent material to glow in the
dark.
A WARNING
The trunk escape handle is to be used only in an emergency .
@ Tips
The emergency release lever should never
be used as a handle for closing the rear lid .
General information
.,. Park the vehicle as far as possible from mov­
ing traff ic in the event of a flat tire. In the
event of a flat tire, park the vehicle on a lev­
el surface .
It you are on a steep incline, be
especially careful.
.,. Set the parking b rake.
.,. Swi tch the emergency flashers on .
.,. Put on a reflective vest, if avai lable .
.,. Set up the warning triangle, if available .
What do I d o now ? 267
.,. Have the passengers exit the vehicle . They
should move to a safe place, for examp le
beh ind a guard rail.
A WARNING
Pay attention to the steps above. They are
for your p rotection and t he for the safety
of other dr ivers.
A WARNING ...
Imp roper use of the vehicle jack can cause
se rious pe rsonal injuries .
- Never use the screw driver hex head to
tighten w heel bolts, s ince the bolts can­
not attain the necessary tighten ing tor­
que if you use the hex head, potentially
causing an ac cident .
- The fac tory-supplied jack is intended on­
ly fo r yo ur vehicle model. U nder no c ir­
cumstances sho uld it be used to
li ft
heavy vehicles o r other loads; you risk in ­
juring yo urself .
- Never s tart the engine when the vehicle
is raised, w hich co uld cause an acc ident.
- Support the vehicle secu rely wit h appro­
priate stands if wor k is to be performed
underneath the vehicle ; otherwise, there
is a pote ntia l risk for injury.
- Never use the jac k supplied wit h your
Aud i on another vehicle, particularly on a
heav ier one. The jack is only su itable for
use on the vehicle it came with.
@ Tips
- Some of the on board items listed above
are provided on certain mo dels only or
are opt ional extras.
- Before stor ing the jack*, make sure it is
wound back down as far as it w ill go .

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-Do not drive faster than 50 mph (80 km/
h). You r isk having an accident.
- Avoid full-throttle acceleratio n, heavy
braking, and fast cornering . You risk hav­
ing an acc ident.
- Never drive us ing more than one spare
wheel and tire. You risk having an acci­
dent.
- Normal summer or winter tires must not
be mounted on the compact spare whee l
rim.
- For technical reasons, the use of tire
chains on the spare tire is not permitted.
If it is necessary to dr ive with tire chains,
the spare wheel must be mounted on the
front axle in the event of a flat in a rear
t ir e. The newly ava ilable front wheel
must then be i nstalled in pla ce of the
re ar wheel with the f lat tir e. Ins tall ing
the tire chai n befo re mo unting the wheel
and tire is recommended .
- Loose items in the passenger compart­
ment can cause serio us personal inj ury
dur ing hard braking or in an accident.
Never store the inf latable spare tire or
jack and tools in the passenger compart­ ment.
- Norma l summer or winter tires m ust not
be mounted on the compact spare wheel
rim .
Removing the subwoofer
App lies to vehicles : with subwoofer
The subwoofer must be removed before the
spare wheel* can be removed .
Fig. 178 Spa re whee l w ell : subwoo fer
What do I do now ? 269
Removing the subwoofer
.,. Lift the cargo floor¢ page 268, fig . 176.
.,. Pull the latch (D ¢ fig. 178 toward the ca -
ble.
.,. Press the locking tab @down .
.,. Remove the connector ® and set the re-
moved cable as ide .
.,. Remove the bolt @ .
.,. Carefully remove the subwoofer .
Installing the subwoofer
.,. Carefully place the subwoof er n the rim
wel l. The word "FRONT" on the subwoofer
must face forward.
.,. Insert the connector that was removed.
.,. Secure the subwoofer with the bolt .
.,. Fold the cargo floo r cover back into place.
Changing a wheel
Before changing a wheel
Observe the following precautions for your
own and your passenger 's safety when chang ­
ing a wheel .
.,. Aft er you experience a tire failure, pull the
car we ll away from mov ing traffic and try to
reac h
level ground before you stop ¢ &_ .
.,. All passenge rs should
leave the car and
move to a safe location (for instance, behind
the guardrail)¢ &_ .
.,. Engage the
parking brake to prevent your
veh icle from rolling unintentionally¢&_ .
.,. Move
sel ector lever to po sition P ¢ ,&. .
.,. If you are towing a t ra iler, unhi tch the trailer
from your ve hicle .
.,. Take t he
jack ¢ page 268 and the sp a re tire
¢ page 268 out of the luggage com part ­
ment .
A WARNING
You or your passengers could be inj ured
while changing a w heel if you do not fo l­
l ow these safety p recaut io ns:
- If you have a flat tire, move a safe d is­
tance off the road. Turn off the engine,
turn the emergency flashers on and use

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-Support the vehicle securely with ap­
propriate stands if work is to be per­
formed underneath the vehicle;
otherw ise, there is a potential risk for
injury .
- To help prevent injury to yourself and
your passenge rs:
- Do not raise the vehicle until yo u are
sure the jack is secu rely engaged .
- Passenge rs must no t remai n in the ve­
h icle when it is jacked up .
- Ma ke sure that passengers wait in a
safe place away from the vehicle and
well away from the road and traff ic.
- Make sure ja ck position is correct, ad­
jus t as necessary and then conti nue to
raise the jack .
- Changes i n tem pera ture or load can af­
fect the height of the vehi cle.
(D Note
Do not lift the vehi cle by the s ill. Pos ition
the vehicle jac k only at the designated lift­
ing points o n the sill. Othe rwise, your vehi­
cle will be damaged .
Taking the wheel off/installing the spare
Follow these instructions step-by-step for
changing the wheel.
F ig . 1 84 Chan gin g a w hee l: us ing t he sc rew driver han ­
dl e (w it h t he bla de removed) to t urn th e bolts
What do I d o now ? 273
Fig . 1 8 5 Changi ng a wheel : al ig nme nt p in in sid e th e
t op hole
After yo u have loosened all wheel bo lts and
raised the vehicle
off the ground, remove and
replace the wheel as follows :
Removing the wheel
.,. Use the he xag onal so cket in the scre wdriv ­
er handle
to comple tely remove the top­
most whee l bolt and set it aside on a
clean
surface ¢ fig. 184.
.,. Screw the threaded end of the alignment
pin from the tool kit hand- tight into the
empty bolt hole
Q fig . 185.
.,. Then remove the other wheel bolts as de­
scribed above .
.,. Take
off the whee l leaving the alignment pin
in the bo lt ho le
¢ (D .
Putting on the comp act spare wheel
.,. Lift the spare wheel and carefully slide it
over the alignment p in to g uide it in place
¢ (D .
.,. Use the hexagona l socket in the screwd river
h a ndle to screw in a nd tig hten all whee l
bolts
slightly .
.,. Remove the alignment pin and insert and
tighten the remaining whee l bolt slightly
like the rest .
.,. Turn the jack hand le counter-clockwise to
lower the veh icle until the jack is fully re­
leased .
.,. Use the wheel bo lt wrench to tighten all
wheel bo lts firm ly
i=;, page 271. Tighten
them
c rosswise, from one bolt to the (ap­
proximately) opposite one, to keep the
wheel cente red.

274 What do I do no w?
When removing or installing the wheel,
the rim could hit the brake rotor and dam­
age the rotor. Work carefully and have a
second person help you.
Never use the hexagonal socket in the han ­
dle of the screwdriver to loosen or t ighten
the wheel bolts.
- Pull the reversible b lade from the screw­
driver before yo u use the hexagonal
socket in the handle to turn the whee l
bo lts.
- When mounting tires with
unid irectional
tread design
make sure the tread pat­
tern is pointed the r ight way
¢page 274.
- The wheel bolts should be clea n and easy
to tu rn . Check for d irt and corrosion on
the mat ing su rfaces of both the whee l
and the h ub. Remove a ll dirt from these
su rfaces before remo unti ng the wheel.
Tires with unidirectional tread design
Tires with unidirectional tread design must be
mounted with their tread pattern p ointed in
the right direction.
Using a spare tire with a tread pattern
intended for use in a specific direction
When using a sp are tire w ith a tread pa tte rn
i nten ded for use in a specific direc tion, p lease
note t he following:
- T he direction of rotation is marked by an a r­
row on the side of the tire.
- If the spare t ire has to be installed in the in­
c orrec t direction, use the spa re tire only
tempor arily si nce the t ire will no t be able to
achieve its op timum performance character­
istics with regard to aquaplaning, noise and
wear .
- We recommend tha t you pay particular a t­
tention to this fact during wet weather and
that you adjust your speed to matc h road
condit ions. -
Replace the flat ti re with a new one and
have it insta lled on your vehicle as soo n as
possible to resto re the hand ling advantages
of a unidirectional tire.
Notes on wheel changing
Please read t he information ¢ page 254, New
tires and replacing tires and wheels
if you a re
going to use a spa re tire which is different
from the t ires on you r vehicle.
After you change a tire:
- Check the tire pre ssure on the spare imme­
diately after installation .
- Have the wheel bolt tightening torque
c hecked with a torque wrench as soon as
possible by your author ized Audi dealer or
a qualified service stat ion.
- With steel and alloy wheel r ims, the wheel
bolts a re co rrectly tightened at a torque of
90 ft lb (120 Nm ).
- If you notice that the wheel bolts are cor ­
roded and difficult to turn while changing
a tire , they should be replaced before you
check the t ightening torque .
- Replace the flat tire w ith a new one and
have it installed on your vehicle as soon as
po ssible . Remount the wh eel cover.
Until then , dr ive with e xtra care and at re­
duced speeds.
A WARNING
= -
- If you are going to equ ip your vehicle
with tires o r rims which differ from those
which were facto ry installed, then be
s ure to read the information¢
page 25 4,
New tires and repla cing tires and
wheels.
- Always m ake s ure the dam age d wheel o r
even a flat tire a nd the jack and tool ki t
are properly secu red in the luggage com­
pa rtment and are not loose in the pas ­
senger compartment.
- In an accident or sudden maneuver they
could fly forwa rd, injuring anyone in the
veh icle.

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-Always store damaged wheel, jac k and
tools secure ly in t he luggage compart­
ment. Otherw ise, in an acc ident or sud­
den ma neuver they could fly forward,
caus ing injury to passeng ers in the vehi­
cle.
What do I do now? 275
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