2018 AUDI S4 engine coolant

-If the hood is not latched completely, it
could fly up while you are driving and ob­
struct your vision.
Engine compartment overview
The most important check points.
Checking and Filling
Fig. 268 Typical location of the reservoir a nd t he engine o il filler ope ning
(!) Washer fluid reservoir (O) c::> page 332
@ Jump start po int( +) under a cover,(-) w ith
hex head screw
¢page 332 c:>page 374
@ Engine oil filling opening ( © Engine oil label* w ith VW standard
c:> page325
® Coolant expansion tank (- L) c::> page 329
® Brake fluid reservoir ((0) c::> page 330
The location of the engine oil filling opening and
the coolant expansion tank ¢
fig. 268 (items@
and@) may differ depending on the engine ver­
sion .
_& WARNING
-Read and follow all WARNINGS before check-
in g anything in the engine compartment
c:> page 323.
Engine oil
Engine oil specifications
The engine oil used must conform to exact speci­
fications.
The service interval display in the instrument
cluster of your vehicle will inform you when it is
time for an oi l change . We recommend that you
have your oil changed by an authorized Audi Serv-
ice Advisor.
.,..
325

areas, into open streams or down sewage
drains.
- Recycle used engine oil by taking it to a used
engine oil collection facility in your area, or
contact a service stat ion .
Cooling system
Coolant
The engine coo ling system is filled with a mixture
of purified water and coolant additive at the fac­
tory. This coolant must not be not changed.
The coolant level is monitored through
the. in­
dicator light
¢ page 30. However , we do recom­
mend occasiona lly checking the coolant level
manually.
If you must add coolant, use a mixture of water
and coolant addit ive. Mixing the coolant additive
with distilled water is recommended.
Coolant additive
The coolant additive is made of anti -freezing and
corrosion protection agents. Only use the fol low­
ing coolant additives . These additives may be
mixed with each other.
Coolant additive Specification
G13
TL 774 J
G12++ TL
774 G
The amount of coo lant additive that needs to be
mixed with water depends on the climate where
the vehicle will be operated. If the coolant addi­
tive percentage is too low, the coolant can freeze
and damage the engine.
Coolant Freeze protec-
additive tion
Warm min . 40% min. -13 °F
regions max .
45% (
- 25 °()
Cold min.
50% max
. -40 °F
regions max.
55% (-40 °()
(D Note
-
Before the start of winter, have an author­
ized Audi dealer or authorized Audi Service
Facility check if the coolant additive in your
Checking and Filling
vehicle matches the percentage appropriate
for the climate. This is especia lly important
when driving in colder climates.
- If the appropriate coo lant additive is not
available in an emergency, do not add any
other additive. You could damage the en­
gine. If this happens, only use water and re­
store the correct mixture ratio with the
specified coolant add itive as soon as poss i­
ble .
- Only refill w ith new coolant.
- Radiator sealant must not be mixed with
the coolant.
Adding coolant
Fig. 270 E ngine compartment: re lease button on coolant
expansion tank
Observe the safety precautions ¢,&. in Working
in the engine compartment on page 323.
Checking the engine coolant level
.. Park the vehicle on a level surface .
.. Switch the ignition off .
.. Read the coolant level on the coolant expansion
tank
¢ fig. 270.
.. The coolant level must be between the MIN and
MAX markings when the engine in co ld. When
the engine is warm it can be slightly above the
MAX marking.
Adding coolant
.. Let the eng ine cool down .
.. Place a cloth over the coolant expansion tank
cap .
.. Push the release button ¢ fig. 2 70 and carefu l­
ly unscrew the cap to the left until you feel re-
sistance¢ ,A. IIJ,-
329

Checking and Filling
.,. Push the release button again and remove the
cap comp lete ly .
.,. Make sure that the fluid level rema ins stable.
Add more coolant if necessary .
.,. Turn the cap to the right to secure it until you
feel resistance a second t ime.
Coolant loss usually indicates there is a leak . Im ­
mediately drive your vehicle to an authorized
Audi dealer or authorized Audi Serv ice Facility
and have the cooling system inspected . If the
coo ling system is not leaking, a loss can come
from the coolant boiling through overheating
and being pushed out of the cool ing system.
_& WARNING
- T he coo ling system is under pressure. Do
not open the coolant expansion tank cap
when the engine is hot. This increases the
risk of burns.
- The coo lant add itive and the coolant can be
dangerous to your healt h. For this reason,
keep the coolant in the origina l container
and away from children. There is a risk of poison ing.
- When working in the engine compartment, remember that the radiator fan can switch
on even if the ign ition is switc hed off, which
increases the risk of in jury.
(D Note
Do not add coolant if the expansion tank is
empty. There may be air in the cooling sys­
tem, wh ic h increases the risk of engine dam­
age.
If th is is the case, do not continue dr iv­
ing . See an a uthorized Aud i dea le r or author­
ized Aud i Service Fa cil ity fo r assistance.
330
Brake fluid
Fig. 271 En gine compa rtment: cap o n brake fluid reservo ir
Observe the safety precautions¢.&, in Working
in the engine compartment on page 32 3 .
Check ing the brake fluid level
.,. Read the brake fluid level on the brake fluid
reservoir ¢ page 325, fig . 268 . The brake flu id
level must be between the MI N and MAX ma rk­
ings ¢.&, .
The brake f lu id level is monito red automatically.
Changing the brake fluid
Have the brake fluid changed regularly by an au­
thorized Audi dea ler or authorized Audi Service
Facility.
_& WARNING -
- If the brake flu id leve l is below the MIN
marking, it ca n impair the brak ing effect
and driving safety, wh ich increase the r isk of
an accident. Do not continue dr iv ing . See an
author ized Audi dealer or au thori zed Audi
Serv ice Facility fo r ass ist ance.
- I f the brake fl uid is old, b ubbles may form
in the bra ke system dur ing heavy bra king.
This wo uld im pair b raking per formance and
driving safety, which increases the risk of an
accident.
- To ensure the brake system functions cor­
rectly, only use bra ke fluids tha t comp ly
wit h VW standard 50 1 14 or
FMVSS- 116 DOT 4 .
(D Note
-If the bra ke f lu id leve l is ab ove the MAX
marking, bra ke fluid may le ak o ut over the

Consumer Info rmation
today's a utomo biles, have steadily reduced the
scope of maintenance and repairs which can be
carried out by veh icle owners.
Also , sa fet y and
en vironmental
concerns place very strict limits
on the nature of repairs and adjustmen ts to en­
g ine and transmission parts wh ich an owner can
perform .
Maintenance, adjustments and repairs usually re­
qu ire special tools, testing devices and other
equ ipment available to specially trained work ­
shop personnel in order to assure proper per­
forma nce, re liability and safety of the veh icle and
its many systems .
Improper maintenance, adjustments and repairs
can impair the operation and reliab ility of your
ve hicle and eve n void your vehicle warranty .
Therefo re, proof of se rvicing in a ccordance w ith
the m aintenance sched ule may be a condition for
up ho ld ing a possible wa rranty claim made within
the wa rranty pe riod.
Above all , ope rational safety can be adversely af­
fected, cre ating unne cessa ry risks fo r you and
your passengers.
I f in doubt about any servicing, have it done by
your author ized Audi dealer or any other properly
eq uipped and qualified workshop . We strongly
urge you to g ive your author ized Audi dealer the
opportunity to perform a ll scheduled mainte ­
nance and necessa ry repairs. Your dealer has the
facilities, origina l parts and tra ined specialists to
keep your veh icle runn ing prope rly.
Performing limited maintenance yourself
The fo llow ing pages describe a limited number of
procedures whic h can be performed on your vehi­
cle with ordinary tools, should the need arise and
tra ined personnel be unava ilable. Before per­
forming any of these procedures, always thor­
ough ly read all of the app licab le text and carefu l­
ly follow the instructions g iven . A lways rigorously
observe the
WARNINGS prov ided .
Befo re yo u check anything in the engine com ­
partment, always read and heed all WARNINGS
c::> & and c::> & in Working in the engine compart­
ment on page 323 .
384
A WARNING
-
-Ser ious personal in jury may occur as a result
of imp roperly performed maintenance, ad­
justments or repairs .
- Always be extreme ly careful when work ing
on the vehicle . Always follow commonly ac­
cepted safety practices and general com­ mon sense. Never r is k personal in jury.
- Do not attempt any of the mainte nance,
checks or repairs described on the following pages if you are no t fu lly fam iliar with these
or other proce dures with respect to the ve­
hicle, o r are uncert ain how to p ro ceed.
- Do not do any work wi thout the prope r tools
a nd equi pmen t. H ave the necess ary wo rk
done by your authorized Au di dealer or an ­
other properly equipped and qualified work­
shop.
- The engine compartment of any motor veh i­
cle is a potentially hazardous area . Never
reach into the a rea around or touch the radi­
ator fan. It is temperature controlled and
can switch on suddenly - even when the en­
gine is off and the ignition key has been re­
moved. The rad iator fan switches on auto­
mat ica lly when the coolant reaches a certain
temperature and will con tinue to ru n until
the coolant temperat ure drops.
- Always remove the igni tion key before any­
one gets u nder the vehicle.
- Always support your vehicle with safety
stands if it is necessary to work underneath
the vehicle. The ja ck* s upplied w ith the vehi­
cle is no t ad equate fo r thi s pu rpose and
could collapse causing se rious personal in ­
jury .
- If you must wor k underne ath the vehicle
with the wheels on t he ground, always make
sure the vehicle is on level ground, that the
wheels a re always sec urely blocked and that
the engine cannot be started.
- Always make sure the transmission se lector
lever (automatic t ransm iss ion) is in P (Park
position) and the park b rake is applied.

a co .... N ,....
N .... 0 0
3 co
@ For the sake of the environment
-Changing the engine settings wi ll adversely
affect emission leve ls. Th is is detrimental to
the env ironment and increases fuel con­
sumption.
- Always observe environmental regu lations
when disposing of old engine o il, used brake
flu id, d irty engine coolant, spent batteries
or worn out tires .
- Undeployed airbag modules and pretension­
ers might be classified as Perchlorate Mate­
rial -spec ial handling may apply, see
www .dtsc.ca.gov/hazardouswaste/perchlo­
rat e. When the vehicle or pa rts of the re­
straint system including airbag modules
safety be lts with pretens ioners are scrap­
ped, a ll applicab le laws and regulations
must be observed. Your a uthorized Audi
dealer is familiar with these requirements
and we recommend that you have your deal­ er perform this service for you.
Accessories and
technical changes
Additional accessories and parts
replacement
Always consult on authori zed Audi dealer before
purchasing accessories.
Audi vehicles that are constructed w ith advanced
materials like Steel/Aluminum (Hybrid construc­
tion), Aluminum (Audi Space Frame), and/or Alu­ minum/Carbon Fiber (Ultra Advanced Light
We ight Materials) are as unique as the ir drivers .
Therefore, the ava ilability of certain parts needed
for repair , restoration , or reconstruction wi ll be
restricted , or parts will be unava ilable, if the ve­
hicle is not repaired at an a uthorized Audi colli­
sion repair facility. This includes but is not limit­
ed to structura l parts which require specialized
training and equipment to restore their crash ­
worthiness back to the original NHTSA and IIHS performance.
Your vehicle incorporates the latest safety design
features ensuring a high standard of active and
passive safety.
Consumer Inf ormation
This safety could be compromised by non-ap ­
proved changes to the vehicle. For this reason, if
parts have to be rep laced, please observe the fol­
lowing points when install ing additional accesso­
ries:
Approved Audi accessories and genuine Audi parts are avai lab le from authorized Aud i dea lers.
T hese dea le rs also have the necessa ry facilities,
tools and trained specialists to install the parts
and accessories properly .
A WARNING
-Using the wrong spare parts or using non-ap-
proved accessories can cause damage to the
vehicle and serious personal injury.
- Use on ly accessories expressly approved by
Aud i and genuine Audi spare parts
- These parts and accessor ies have been spe­
cially designed to be used on your vehicle.
- Do not use license plate brackets in the
front area that are different from the one
installed at the factory, or add additional
li­
cense plate brackets.
- Never install accessor ies such as telephone
cradles or beverage holders on airbag covers
or w ith in the airbag deployment zones . Do­
ing so will increase the risk of injury if a ir­
bags are triggered in an accident!
- Before you check anyth ing in the engine
compartment, always read and heed all
WARNINGS
9poge 323.
(D Note
- If items other than genu ine Audi spare
parts, add -on equipment and accessory
items are used or if repair work is not per­
formed according to specified methods, this
can result in seve re damage to your vehi­
cle's engine and body (such as corrosion)
and adversely affect your vehicle's warranty.
- If emergency repa irs must be performed
elsewhere, have the vehicle exam ined by an
authorized Audi dealer as soon as possib le .
- The manufacturer cannot be held liable for
damage which occurs due to failure to com­
ply with these stipulations .
385

a co .... N ..... N .... 0 0
3 co
Emergency call f unction
Au di connect emergency ca ll and service . 202
E me rgency flashe rs . . . . . . . . . . . . . . . . . . . . 56
Emergency starting . . . . . . . . . . . . . . . . . . . 374
E m issions cont rol sys tem . . . . . . . . . . . . . . 32 2
E nergy management . . . . . . . . . . . . . . . . . . 151
Eng ine
Coolant . . . . . . . . . . . . . . . . . . . . . . . . . . . . 329
Start/Stop system . . . . . . . . . . . . . . . . . . . . 85
Starting/stopping . . . . . . . . . . . . . . . . . . . . 83
Starting w it h jumper cables . . . . . . . . . . . 374
Eng ine compartment . . . . . . . . . . . . . . . . . . 323
Opening and clos ing the hood . . . . . . . . . . 324
Safety precautions . . . . . . . . . . . . . . . . . . . 323
E ng ine oi l . . . . . . . . . . . . . . . . . . . . . . . . . . . 325
Adding . ... ... .. .. ..... ... .. .. .... . 327
Changing . . . . . . . . . . . . . . . . . . . . . . . . . . 328
Checking the oil leve l . . . . . . . . . . . . . . . . . 327
Consumption . ............. .. .. .... .
D. t· k lpS IC .. ... ............. ...... ... .
327
327
O il consumption . . . . . . . . . . . . . . . . . . . . . 326
Specification and viscos ity . . . . . . . . . . . . . 325
T empe rature d isp lay . . . . . . . . . . . . . . . . . . 11
Eng ine sound . . . . . . . . . . . . . . . . . . . . . . . . 134
Eng ine Start/Stop mode
refer to Start/Stop system . . . . . . . . . . . . . 87
E nter ing cha racters/numbers (speller) . . . . 162
Enter ing letters (speller) . . . . . . . . . . . . . . . 162
E n terta inment s liding me nu . . . . . . . . . . . . 160
E ntry/ex it lighting . . . . . . . . . . . . . . . . . . . . . 56
Environment Proper disposal of drained engine o il ... .
Unleaded fuel . .. ........... .. .. .... .
E S C
.. .. .. .. ... .. .. ..... ... .. .. .... .
Hill descent assist ... .... ... .. .. .... .
Offroad mode ... .. .. .... ... .. .. .... .
Sport mode 328
315
1 46
148
147
147
E v asive steering suppo rt . . . . . . . . . . . . . . . 12 1
Event Data Recorder (EDR) . . . . . . . . . . . . . 153
Expanded view . . . . . . . . . . . . . . . . . . . . . . . . 1 5
E xterio r ligh ting . . . . . . . . . . . . . . . . . . . . . . . 54
Exterior mirrors . . . . . . . . . . . . . . . . . . . . . . . 58
E xternal voice operat ion.... ... .. .. .... . 173
Index
F
Factory default settings
Multi Media Interface . . . . . . . . . . . . . . . . 249
Fader (sound) . . . . . . . . . . . . . . . . . . . . . . . . 252
Fastening Booster seats . . . . . . . . . . . . . . . . . . . . . . . 305
Convertib le child safety seats . . . . . . . . . . 303
I n fan t seats . . . . . . . . . . . . . . . . . . . . . . . . 301
Fast forwarding/rewind ing (a udio/video
file) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 236
F ast forwarding ( aud io/v ideo file) . . . . . . . . 236
Fast route
Favorites Media 211
239
Navigation . . . . . . . . . . . . . . . . . . . . . . . . . 206
Telephone. . . . . . . . . . . . . . . . . . . . . . . . . . 180
F ile formats (media drives) . . . . . . . . . . . . . 242
Floor ma ts ..... ... .. ................ .
Foot peda ls . .... .. ................. . . 259
259
F o r the s ake o f th e e nv ironmen t
E nvironmenta lly-friend ly driving . . . . . . . . 80
Fueling . . . . . . . . . . . . . . . . . . . . . . . . . . . . 317
Leaks ... .. .... .. .. ... .. ..... ... .. .. 324
Warming up the engine . . . . . . . . . . . . . . . . 83
F ree text search . .. .. .. .
............ ..
Media .. .. .... .. .. .... . ..... ... .. ..
Navigation .... .. ... .. .. ..... ... .. . .
Radio
. . .. .. ' . .. .. ... .. ..... ... .. . .
Telephone . .... .. ................. . .
F ree ze p ro tect ion 164
2 38
205
223 184
Coo lant . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 9
Freq uency band . . . . . . . . . . . . . . . . . . 222, 225
Front airbags Desc ription . . . . . . . . . . . . . . . . . . . . . . . . . 275
How they work . . . . . . . . . . . . . . . . . . . . . . 281
F rontal collisions and the laws o f physics . . 264
Front passenger 's doo r eme rgency locking . . 42
Front seats Adjusting . . . . . . . . . . . . . . . . . . . . . . . . . . 256
Child restra ints in the front seat . . . . . . . . 272
also refer to Seats . . . . . . . . . . . . . . . . . . . . 65
Fuel Additives
.. .... .. ................. .. 315
B lended gasoline . . . . . . . . . . . . . . . . . . . . 315
Current consumpt io n . . . . . . . . . . . . . . . . . .
17
D iesel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 315
391

Index
Speedometer . . . . . . . . . . . . . . . . . . . . . . . . . 10
Speed warning system . . . . . . . . . . . . . . . . . 102
Speller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 162
Sport differentia l . . . . . . . . . . . . . . . . . . . . . 134
Indicator light . . . . . . . . . . . . . . . . . . . . . . . 35
Sport view . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Stabilization program
refer to ESC . . . . . . . . . . . . . . . . . . . . 146, 147
Start/Stop system . . . . . . . . . . . . . . . . . . . . . 85
Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . 88
Switching off/on . . . . . . . . . . . . . . . . . . . . . 87
S T ART ENGINE STOP button . . . . . . . . . . . . . 83
Starting to drive . . . . . . . . . . . . . . . . . . . . . . . 89
Starting (engine) . . . . . . . . . . . . . . . . . . . 83, 86
Steering Electromechanical steering . . . . . . . . . . . . 150
L ocking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
also refer to Electromechanical steering 150
Steering wheel Adjusting . . . . . . . . . . . . . . . . . . . . . . . . . . . 82
Shift paddles . . . . . . . . . . . . . . . . . . . . . . . . 94
Steering wheel heating . . . . . . . . . . . . . . . . 79
also refer to Multifunction
steering wheel . . . . . . . . . . . . . . . . . 13, 15, 16
Steps for determining correct load limit . . . 348
Stopover (navigation) . . . . . . . . . . . . . . . . . . 209
Stopping (engine) . . . . . . . . . . . . . . . . . . . . . . 86
Storage compartments . . . . . . . . . . . . . . . . . 69
Stored stations
refer to Favorites . . . . . . . . . . . . . . . . . . . . 225
Streaming
refer to Online media . . . . . . . . . . . . . . . . . 232
Street View . . . . . . . . . . . . . . . . . . . . . . . . . . 216
S tronic (automatic transmission) . . . . . . . . . 91
Subtitles (DVD) . . . . . . . . . . . . . . . . . . . . . . . 239
Subwoofer. . . . . . . . . . . . . . . . . . . . . . . . . . . 252
Sunshade Rear window/rear doors . . . . . . . . . . . . . . . 60
Sun visors . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
Suspension control . . . . . . . . . . . . . . . . . . . . 134
Swap call . . . . . . . . . . . . . . . . . . . . . . . . . . . . 179
Switching tabs
refer to Multifunction
steering wheel . . . . . . . . . . . . . . . . . 13, lS, 16
Switching the ignition on/off. . . . . . . . . . . . . 83
398
Symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16S
Navigation . . . . . . . . . . . . . . . . . . . . . . . . . 214
Traffic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 219
also refer to Indicator lights . . . . . . . . . . . . 2S
SYNC (button) . . . . . . . . . . . . . . . . . . . . . . . . . 79
System settings (MMI) . . . . . . . . . . . . . . . . . 248
System update (MMI) ... ............... 251
System volume 252
T
Tachometer . . . . . . . . . . . . . . . . . . . . . . . . 10, 12
Tail lights
Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . 355
TOI clean diese l
refer to Ad Blue... .. .. ............... 319
Technical data ...... ... ............... 379
Technical modifications . . . . . . . . . . . . . . . . 386
Telephone . . . . . . . . . . . . . . . . . . . . . . . . . . . 175
Connecting . . . . . . . . . . . . . . . . . . . . . . . . . 175
Dialing a number . . . . . . . . . . . . . . . . . . . . 178
Options during a phone call . . . . . . . . . . . 179
Playing music . . . . . . . . . . . . . . . . . . . . . . . 230
Set tings . . . . . . . . . . . . . . . . . . . . . . . . . . . 185
Temperature display Coolant . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Outside temperature . . . . . . . . . . . . . . . . . . 10
Tether anchors . . . . . . . . . . . . . . . . . . . . . . . 312
Tether strap .. .. .. .. .. ............. .. 312
Text messages . . . . . . . . . . . . . . . . . . . . . . . 180
Tie-downs . . . . . . . . . . . . . . . . . . . . . . . . 73, 261
Tightening specification Wheel bolts . . . . . . . . . . . . . . . . . . . . . . . . 366
Tightening specification (wheel bolts) . . . . 366
Time ......... ... ... ............. ... 248
Tire Mobility System (tire repair set) . . . . . . 361
Tires....... .. .. .. .. .. ... .......... .. 334
Low-profile tires . . . . . . . . . . . . . . . . . . . . . 350
quattro . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150
Repair set . . . . . . . . . . . . . . . . . . . . . . . . . . 361
R eplacing . . . . . . . . . . . . . . . . . . . . . . . . . . 363
Tire pressure . . . . . . . . . . . . . . . . . . . . . . . 344
Tire pressure monitoring system ... 351,352
Tire pressure table . . . . . . . . . . . . . . . . . . . 345
Tire pressure (trailer towing mode) . . . . . . 99
Unidirectional . . . . . . . . . . . . . . . . . . . 336, 366
Uniform tire quality grading . . . . . . . . . . . 351