engine coolant AUDI S4 2020 User Guide

8W1012721BB
Checking and Filling

— Only refill with new coolant.
— Radiator sealant must not be mixed with
the coolant.
— Due to the risk of engine damage, the cool-
ing system should only be refilled by an au-
thorized Audi dealer or authorized Audi
Service Facility. An authorized Audi dealer or
authorized Audi Service Facility can also pro-
vide you with important information about
the recommended coolant additive.


RAZ-0540


MIN

Fig. 164 Engine compartment - coolant expansion tank: @
cover; (2) markings
Follow the safety precautions > page 214, Gener-
al information.
Checking the coolant level
> Park the vehicle on a level surface.
> Switch the ignition off.
> Open the hood > page 215.
The coolant expansion tank for some engines is
located in the water drip tray under a cover. If
necessary, remove the cover that is located under
the windshield wiper on the front passenger's
side.
> Check the coolant level in the coolant expan-
sion tank > page 216, fig. 162 using the outer
markings (2) > fig. 164. The coolant level must
be between the markings (2) when the engine is
cold. When the engine is warm it can be slight-
ly above the upper marking.
>» Applies to: vehicles with 6-cylinder engine:
There is a float located in the coolant expansion
tank. Read the coolant level using the coolant
level float. When the engine is cold, the float
must be located between the MIN marking and
the edge of the filler opening on the coolant ex-
pansion tank.
Adding coolant
Requirement: there must be a residual amount of
coolant in the expansion tank >(@).
If you must add coolant, use a mixture of water
and coolant additive. Mixing the coolant additive
with distilled water is recommended.
> Allow the engine to cool.
>» Place a large, thick towel on the coolant expan-
sion tank cap.
> Push the release button @) © fig. 164 on the
cap and carefully turn it to the left until you
feel resistance > /\.
> Push the release button again and remove the
cap completely.
> Add coolant in the correct mixture ratio
=> page 220 up to the MAX marking. Or, in
vehicles with a 6-cylinder gasoline engine, the
float must be located between the MIN mark-
ing and the edge of the filler opening on the
coolant expansion tank.
> Make sure that the fluid level remains stable.
Add more coolant if necessary.
> Vehicles with 6-cylinder engine: if necessary,
press the float into the coolant expansion tank
using the cover.
> Turn the cap to the right to tighten it until you
feel resistance a second time.
Coolant loss usually indicates that there is a leak.
Immediately drive your vehicle to an authorized
Audi dealer or authorized Audi Service Facility
and have the cooling system inspected. If the
cooling system is not leaking, coolant loss can re-
sult from the coolant boiling due overheating
and then being forced out of the cooling system.

Z\ WARNING
— The engine compartment in any vehicle can
be a dangerous area. Stop the engine and al-
low it to cool before working in the engine
compartment. Always follow the informa-
tion found in > page 214, General informa-
tion.
— Never open the hood if you can see or hear
steam or coolant escaping from the engine >

221

Checking and Filling


compartment. This increases the risk of
burns. The cooling system is under pressure.
When you no longer see or hear steam or
coolant escaping, you may open the engine
compartment with caution.
— When working in the engine compartment,
remember that the radiator fan can switch
on even if the ignition is switched off, which
increases the risk of injury.
— Coolant additive and coolant can be danger-
ous to your health. For this reason, store the
coolant in the original container and away
from children. There is a risk of poisoning.
@ Note
Do not continue driving if the coolant expan-
sion tank is empty. Do not add any coolant,
because air could enter the cooling system
and damage the engine. See an authorized
Audi dealer or authorized Audi Service Facility
for assistance.


Brake fluid

BFV-0229)


Fig. 165 Engine compartment: cap on brake fluid reservoir
Follow the safety precautions > page 214, Gener-
al information.
Checking the brake fluid level
Read the brake fluid level on the brake fluid res-
ervoir > page 216, fig. 162. The brake fluid level
must be between the MIN and MAX markings
SA.
The brake fluid level is monitored automatically.
Message
Ga y @ Brakes: stop vehicle and check brake
fluid level
222
Stop the vehicle and check the brake fluid level.
See an authorized Audi dealer or authorized Audi
Service Facility for assistance.
Changing the brake fluid
Brake fluid should be changed at regular inter-
vals. Have the brake fluid changed by an author-
ized Audi dealer or authorized Audi Service Facili-
ty. The authorized Audi dealer or authorized Audi
Service Facility will inform you of the replace-
ment intervals.

Z\ WARNING
— If the brake fluid level is below the MIN
marking, it can impair the braking effect and
driving safety, which increase the risk of an
accident. Do not continue driving. See an au-
thorized Audi dealer or authorized Audi
Service Facility for assistance.
— If the brake fluid is old, bubbles may form in
the brake system during heavy braking. This
could impair braking performance and driv-
ing safety, which increases the risk of an ac-
cident.
— The brake fluid in your vehicle must meet
the standard VW 501 14 and is available at
an authorized Audi dealer or authorized
Audi Service Facility. If this brake fluid is not
available, another high-grade brake fluid of
equivalent quality may be used, and it must
meet
the U.S. Federal Motor Vehicle Stand-
ard (FMVSS) 116 DOT 4, Class 6.

@) Note
— If the brake fluid level is above the MAX
marking, brake fluid may leak out over the
edge of the reservoir and result in damage
to the vehicle.
— Do not allow any brake fluid to come into
contact with the vehicle paint, because it
will corrode the paint.
Electrical system
If the =z or fm] indicator light turns on, there is a
malfunction in the generator, the battery, or the
vehicle electrical system.

8W1012721BB
Index

F
Factory default settings
Multi Media Interface................. 207
Fast forwarding and rewinding (media files) . 197
Fast forwarding (media files)............ 197
Fast route... . eee eee eee 177
Favorites
BIWEtOOtH s = sass ¢ s eeae ¢ 5 Besse Hee aE 208
NaVigationis ¢ s cesses « 2 smsnsns w + seaians @ 5: secu 178
Telephone... ...... cece eee eee eee 163
Federal Communications Commission (FCC) . 275
File formats (media drives).............. 201
Filling
Tank capacities.......... 0.00022 eae 278
FIXGUTE SOBs is 6 cctene w e cenrere we ermine s Heme vee 84
For the sake of the environment
Disposing of engine oil................ 219
FUGLING s = sacsu = & corey 5 % tees 5 2 CoG FS eS 211,
Oo eee ee ee 215
Forward gear
refer to Gears... . eee eee eee 94
Free text search
Media... .... ec eee eee eee eee 200
Radioves « = cows « = sews so tes ee ees FP oe 190
also refer to Intelligent search.......... 177
Freeze protection
Coolant... .... 2... eee eee eee 220
Frequency bands « « cesiie a 6 scone a wanna 6 6 ow 188
also refer to Frequency band........... 188
Front center armrest...............0...- 62
Front collision warning
refer to Audi pre sense front............ 139
Front passenger’s seat adjustment
R@af wess 2 s aves 7 ¥ eee © e ewe x Y Bem eH ee 62
Front wiper blades
GHANGING)'s = = cosa =o vase =o ween © rem 2 YB 56
CLEARING « « vxorcise esesese 0 4 uounece 0 9 enecee «weet 56
Ch: sncevss 6 @ sessans « 0 vomans a 2 row & ¥ one =o HO 210
Additives... 0.0... . cee eee eee ee eee 211
Current consumption « cc. «+ sews se eegu ee 15
Fuelidisplay, sissies x asssce a a arene + ¥ name 6 e ow 11
Gasoline
Reducing fuel consumption............. 99
Tank. capacity’. « ccs se cen vo neem eae 278

Fueling
Fuel filler door. .... 0.0... cece e eee ee 211
Fuel filler door emergency release....... 213
Functions on demand...............4.. 171
Functions that require a license
refer to Functions ondemand.......... L171
Fuses
IASSIQNIMIEN ES & sesoies & w sasene © 8 cansers a a emnoees 265
Replacing......... 0. cece eee eee eee ee 264
G
Garage door opener...........0-..0e eee 45
Garment hooks ........ 0.0 e cece eee eee 78
GasOliMe arco: x saves wo anane = y oem moa aw 210
Additives... 0.0.0... cece cece eee eee 211
Gasoline: MIXtUE wacx « s wemy cv came : eee 210
GAWR
refer to Gross Axle Weight Rating (GAWR) . 278
GOATS: x © exes = & wee ¥ ¥ eeu = RoRee SE Pe ee 94
Glossary of tire and loading terminology... 230
Glove compartment...............000005 78
LOckKablets. + cwou 4 x youn os nau sx Meme Fe me 78
Valet parking. .......... ccc eee eee 44
Gross Axle Weight Rating (GAWR)........ 278
Gross Vehicle Weight Rating (GVWR)...... 278
GVWR
refer to Gross Vehicle Weight
Rating (GVWR) .......... 00sec eee eee 278
H
Handsfree. ..... 2... ee eee ee eee 159
Hands Free Profile..................... 159
Head-up display
Adjusting ..... 0... 66. e eee eee 23
Adjusting the brightness ................ 52
OPeratiAg’, « s sussau v saan av epcasan ew anes ow a8 23
Headlight range control...............005 48
Headlights’. 2 cus xe ren vo semw so ames 6 0 ee 48
Cleaning... 0.0.2... cece cece eee eee 248
Headlight range control................ 48
Washer system « «sees 2s sees s eeee ee oes 55
Head feSthaints © aims pasms » mens ss vo se 63
Heated rear window................0000e 90
Heated steering wheel................0.. 90
Heating...........0..0 0.0. 87
283