2016 AUDI S4 brake

Care and cleaning
wash operator to reduce the risk of acci­
dents.
- To reduce the risk of cuts, protect yourself
from sharp metal components when was h­
ing the underbody or the inside of the wheel
housings.
- A fter washing the vehicle, the braking effect
may be delayed due to mo isture on the
brake rotors or ice i n the winter. The brakes
must be dried first w it h a few careful brake
applications.
{U) Note
- If you wash the ve hicle in an automatic car
wash, you must fold the exterior m irrors in
to reduce the risk of damage to the mirrors.
Power folding exte rior m irrors* must on ly
be fo lded in and out us ing the power folding
f u nct io n.
- T o p revent paint damage, do not wash the
vehicle in di rect sunlight. -
To red uce the risk of damage to the s urface,
do not use insect removing sponges, k itchen
sponges o r similar items .
- Matte finish painted vehicle components:
- To reduce the r isk of damage to the sur-
face, do not use polishing agents or hard
wax.
- Neve r use protective wax. It can destroy
the matte finish effect .
- Do not place any stickers or magnetic
signs on vehicle parts painted with matte
finish paint. The paint could be damaged
when the stickers or magnets are re­
moved.
@ For the sake of the environment
Only wash t he veh icle in facili ties spec ially de­
s igned for that pu rpose. This will reduce the
r isk of dirty wate r cont am ina ted with o il from
en te ring the sewe r system.
Cleaning and care information
W hen clean ing and ca ring for ind ividua l vehicle
com ponents, refer to the fo llow ing tables. The
i n fo rmat ion conta ined there is s imply recom­
mendations. For ques tions or for components that are
not listed, cons ult an autho riz ed Aud i
dealer or au thor ized A udi Servi ce Fac ility. Also
f o llow the informa tion fo und in ¢ .&, .
Exterior cleaning
Component Situation Solution
Wind shield wiper
Deposits ¢ page 55, Cleaning windshield wiper blades
blades
Headlights
/ Tail
Deposits Soft sponge with a m ild soap solutiona>
lights
Sensors /camera
Deposits Sensors: soft cloth with solvent-free cleaning solut ion
lenses Camera lenses: soft cloth w ith alcohol-free cleaning so lu-
tion
Snow/ice H
and br ush/solvent-free de-icing spray
Wheels Road salt Water
Brake dus t Acid
-free special clean ing solu tion
E x haust tail pipes Road salt Water, clean ing solution su itab le for stainless stee l, if nee -
essary
Decorative parts / Deposits Mild soap so
lution al, a cleaning so lution suitable for stain-
t rim less stee l, if necessary
194

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Checking and Filling Hood
Releasing and opening the engine hood
The engine hood is released from inside the vehi­
cle.
Fig. 179 Driver's side footwell: engine hood re lease lever
... ~ - -
Fig. 1 80 Release lever under the engine hood
Before opening the engine hood, make sure that
the windshield wipers are flat against the w ind­
shie ld. Otherwise, they could damage the paint
on the hood.
.. Wi th the driver's door open, pu ll the leve r un­
der the instrument panel in the direction of the
arrow ¢
fig. 179 .
.. Raise the hood slightly¢&.
.. Press the rocker switch under the hood upward
¢fig . 180. This releases the catch.
.. Open the hood.
A WARNING
Hot engine coo lant can burn you.
- To reduce the risk of be ing burned, never
open t he hood if yo u see or hear steam or
coolant esca ping from the eng ine compart­
me nt. Wait unt il no s team or coolant ca n be
Checking and Filling
seen or hea rd before carefully opening the
hood.
Closing the engine hood
.. Pull the hood down until the pressure from the
struts is reduced.
"' Le t the hood
drop down and latch in p lace. Do
not try to push it shut;
it may fail to engage
¢ &, .
A WARNING
A hood that i s not comple tely latched co uld
fly up a nd blo ck your view while driv ing.
- W hen you close the engine hood, check it to
ma ke sure the s afety catch h as prope rly en­
ga ged. The hood should be flush with t he
surroundi ng ve hicl e body pa rts.
- If you no tic e while driv ing t hat t he hoo d is
not secured properly, stop at once and close
it.
Working in the engine compartment
Be e specially careful whenever you work in the
engine compartment.
-
Whenever you mu st perform an y work in the
engine compartment, for example checking and
filling different fluids, there is a risk of injury, burn s and a ccidents. To prevent per sonal injury
always observe the following WARNINGS. The
eng ine compa rtment of any vehicle is a hazard ­
ous area
¢ .&. .
A WARNING
-~
To help avoid injury, before you check any­
th ing under the hood:
- Turn off the engine.
- Remove the ignition key .
- Apply the par king brake.
- Move selector leve r of autom atic t ransm is-
sion to "P" (Park); put manual transm ission
in Neutral.
- Always let the engine cool down. Ho t com ­
ponents w ill bur n skin on contact .
203

Checking and Filling
-To reduce the risk of being burned, never
open the hood if you see or hear steam or
coolant escaping from the engine compart­
ment . Wait until no steam or coolant can be
seen or heard before carefully opening the hood.
- Keep children away from the engine com­ partment.
- Never spill fluids on hot engine compo­
nents. They can cause a fire.
- Never touch the radiator fan. The auxiliary
electric fan is temperature controlled and
can switch on suddenly .
- Never open the coolant reservoir cap when
the engine is still warm. The coolant system is pressurized and hot coolant could spray
out.
- Protect your face, hands and arm from
steam or hot engine coolant by placing a
thick rag over the cap when you open the coolant reservoir.
- Do not remove the engine cover under any
circumstances. This increases the risk of
burns.
- If work on the fuel system or the electrical
system is necessary:
- Always disconnect the battery.
- Never smoke or work near heaters or open
flames. Fluids in the engine compartment could start a fire.
- Keep an approved fire extinguisher imme­
diately available.
- To avoid electrical shock and personal injury
while the engine is running or being started,
never touch:
- Ignition cables
- Other components of the high voltage
electronic ignition system .
- If you must perform a check or repair with
the engine running:
- First, fully apply the parking brake, move
selector lever of automatic transmission
204
to "P" (Park); put manual transmission in
Neutral.
- Always use extreme caution to prevent
clothing, jewelry, or long hair from get­
ting caught in the radiator fan, V-belts or
other moving parts, or from contacting hot parts . Tie back hair before starting,
and do not wear clothing that will hang or
droop into the engine.
- Minimize exposure to emission and chemi­
cal hazards
c::> /.1. .
A WARNING
California Proposition 65 Warning:
- Engine exhaust, some of its constituents, and certain vehicle components contain or
emit chemicals known to the State of Cali­
fornia to cause cancer and birth defects and
reproductive harm . In addition, certain flu­
ids contained in vehicles and certain prod­
ucts of component wear contain or emit
chemicals known to the State of California
to cause cancer and birth defects or other
reproductive harm.
- Battery posts, terminals and related acces­
sories contain lead and lead compounds,
chemicals known to the State of California
to cause cancer and reproductive harms .
Wash hands after handling.
(D Note
When adding fluids, always make sure that
they are poured into the proper container or
filler opening, otherwise serious damage to
vehicle systems will occur.
@ For the sake of the environment
To detect leaks in time, inspect the vehicle
floor pan from underneath regularly . If you
see spots from oil or other vehicle fluids, have
your vehicle inspected by an authorized Audi
dealer.

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Checking and Filling
Engine compartment
Engine compartment
These are the most important items that you can check.
Fig. 181 Typical layout for containers and e ngin e oil fille r cap
(D Eng ine o il filler cap ( @ Jump start po int(+) under a cover
@ Brake fluid reservoir
((0) ...... .
@ Coolant expansion tank (- L) .... .
® Jump start point( -) with hex head 207
214,251
211 210
screw . . . . . . . . . . . . . . . . . . . . . . . 214, 251
@ Windshield/headlight* washer con-
tainer
(W) . . . . . . . . . . . . . . . . . . . 216
The position of the engine oil filling hole
c:> fig. 181 (item @) can differ depending on the
engine design .
A WARNING
Before you check anything in the engine com­
partment, always read and heed all WARN­
INGS
c:> &. in Working in the engine compart­
ment on page 203.
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 oi l changed by an authorized Audi Serv­
ice Advisor.
If you have to top off the oil between oil changes,
use the Audi oil quality standard specified in the
table .
Audi oil quality standard
Gasoline
VW 502 00 or
engine vw 504 00
205

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-To avoid being burned, do not spill anti­
freeze or coolant on the exhaust system or hot engine parts. Under certain condi­
tions, the ethylene glycol in engine cool­ ant can catch fire.
- Antifreeze is poisonous. Always store anti­
freeze in its original container and well out
of the reach of children.
- If you drain the coolant, it must be caught
and safely stored in a proper container
clearly marked "poison".
(D Note
-Do not add coolant if the expansion tank is
empty . Air could enter the cooling system
and damage the engine. If this is the case,
do not continue driving. Seek professional
assistance.
- Coolant pollutes the environment and could
cause an engine fire. Excess coolant will be
forced out through the pressure relief valve
in the cap when the engine becomes hot.
- If, in an emergency, only water can be add­
ed, the correct ratio between water and an­
tifreeze
c::> page 208 must be restored as
soon as possible.
@) For the sake of the environment
Drained coolant should not be reused. Always
dispose of used coolant while observing all
environmental regulations.
Radiator fan
The radiator fan switches on automatically by it­
self.
The radiator fan is driven by the engine via the V­
belt . The viscous clutch regulates the speed of
the fan according to the temperature of the cool­
ant.
An auxiliary electric radiator fan* switches on and
off depending on coolant temperature and other
vehicle operating conditions.
After you switch the engine off, the auxiliary fan
can continue running for up to 10 minutes -even
Checking and Filling
with the ignition off. It can even switch on again
later by itself
c::> & , if
- the temperature of the engine coolant rises due
to the heat build-up from the engine in the en­
gine compartment, or
- the engine compartment heats up because the
vehicle is parked in intense sunlight.
A WARNING
-To reduce the risk of personal injury never
touch the radiator fan.
- The auxiliary electric fan is temperature
controlled and can switch on suddenly even
when the engine is not running.
- The auxiliary radiator fan switches on auto­
matically when the engine coolant reaches a
certain temperature and will continue to run
until the coolant temperature drops.
Brake fluid
Checking brake fluid level
The broke fluid level con be checked with o quick
glance .
Fig. 185 En gi ne compartmen t: Cover on the b rake fl uid
reservoir
Before you check anything in the engine compart ­
ment,
always read and heed all WARNINGS
c::> _.& in Working in the engine comportment on
page 203.
.,. Read the brake fluid level from the brake fluid
reservoir
c::> fig. 185, c::> page 205, fig . 181 . The
brake fluid level must be between the "MIN"
and "MAX" markings.
211

Check ing and F illing
The brake fluid rese rvoir is located at the rear
partition of the engine compartment on the l eft
side ¢
page 205 .
The fl uid level may drop slightly after some time
due to the automatic adjustment of the brake
pads . This is not cause for alarm.
If th e b rake fl uid level fa lls considerably be low
the "M IN" mark, the b rake warning/ind icator
lig ht ( U.S. mode ls :
1111 , Canadian models:. )
will come on ¢
page 15. Do not contin ue to oper ­
ate the vehicle . T he comp lete brake system
should be thoroughly checked by an authori zed
Aud i dealer or qualified workshop and the cause
corrected . If the brake flu id level is too low, the
b rake warning/indicator light will i llum inate.
Contact a n author ized Audi dealer
immediately .
{D) Tips
The brake fluid reservoir is located under­
neath the cover .
Changing brake fluid
Have the brake fluid changed by an experienced
technician .
Brake fluid absorbs mo isture from the air. If the
water content in the b rake fluid is too high, cor­
rosion in the brake system may resu lt afte r ape ­
riod of t ime. The boiling poi nt of the brake flu id
will also decrease cons iderably and decrease
b raking perfo rman ce.
Therefore, the brake fluid must be changed
every
two year s.
Always use new brake fluid wh ic h con­
forms to Fede ral Motor Veh icle Standard "FMVSS
1 16 DO T 4".
The brake fluid reservoir can be diff icult to reach,
therefore, we recommend that yo u have the
brake fl uid changed by yo ur autho rized
Audi
dealer .
Your dealer has t he corre ct tools, t he
right brake fluid and the know-how to do this for
you.
A WARNING
- Brake fluid is poisonous. It must be stored
only in the closed orig inal container out of
the reach of chi ldren!
212
- Bra ke fa ilure ca n result from old or inapp ro­
priate brake fluid . Observe these precau­
tions:
- Use only brake fluid t hat meets SA E speci­
fi ca ti on
J 170 3 and con forms to Federa l
Motor Ve hicle Standard 116 . Always check
wi th yo ur autho rized Audi dea le r to make
s ur e yo u are using the correct brake fluid .
The correct type of brake flu id is also ind i­
cated on the b rake fluid reservo ir .
- The brake fluid m ust be new . Heavy use of
the brakes can cause a vapo r lock if the
brake fluid is left in the system too long .
This can se riously affect the efficiency of
the b rakes as well as your safety . This
could resu lt in an accident .
(D Note
Brake fluid will damage the paint of your veh i­
cle.
@ For the sake of the environment
Because of the problem o f proper d isposa l o f
brake fluid as well as the spec ial too ls re­
q ui red a nd the necessary expertise, we rec­
omme nd that you have the bra ke f luid
changed by yo ur autho rized Aud i dea le r.
Battery
, General information
U nder normal operating condit ions, the battery
i n your Audi does not need any maintenance.
With
high outside temperatures or long daily
drives we recommend that you have the elect ro ­
lyte level c hecked by an au thorized Aud i dealer o r
qualified workshop. The electro lyte level shou ld
a lso be che cked each time the battery is c ha rged
~ page 214.
Have the batte ry chec ked when you take yo ur ve­
hicle in for service. You are we ll adv ised to re­
pla ce a battery tha t is older than 5 yea rs.
With certain types of airbag deployment, t he
batte ry is d iscon nected from the ve hicle electri­
ca l system for safety reasons ¢.&.
in Repair, care
and disposal of the airbags on page 151. .,.

be happy to provide more infor­
mation.
® Mud and snow capability
"M/5 " or "M+S" indicates the tire
has character istics that make it
suitable for driving on mud and
snow .
& indicates a winter tire .
@Composition of the tire cord
and materials
The number of plies indicates the
number of rubberized fabric lay­
ers in the tire. In general: the
more layers , the more weight a
tire can carry . Tire manufacturers
must also specify the materials
used in the tire. These inc lude
steel, nylon, polyester and other
materials.
@ Maximum permitted load
This number indicates the max i­
mum load in kilograms and
pounds that the tire can carry.
@ Uniform tire quality grade
standards for treadwear,
traction and temperature resistance
Treadwear, traction and tempera­
ture ranges
c::> page 234 .
;;: @ Running direction
\:i ~ ...
'° V, ....
'° ....
The arrows indicate the running
direction of unidirectional tires .
Wheels
You must always follow the speci­
fied runn ing d irect ion
c::> page 244 .
@ Maximum permitted
inflation pressure
This number ind icates the maxi­
mum pressure to which a tire can
be inflated unde r normal operat ­
ing condit ions.
Glossary of tire and loading
terminology
Accessory weight
means the comb ined weigh t (in
excess of those standard items
which may be replaced) of auto­
matic transm ission, power steer­
ing , power brakes, power win­
dows, power seats, radio, and
heater, to the extent that these
items are available as facto ry-in­
stalled equipment (whether in ­
stalled or not) .
Aspect ratio
means the ratio of the heigh t to
the width of the tire in percent .
Numbers of 55 or lowe r indicate a
low sidewa ll for improved steer­
ing response and better overall
handling on dry pavement. .,.
219

(a) Curb weight
(b) Accessory weight
(c) Vehicle capacity weight, and
(d) Production options we ight
Ma ximum (permissible)
inflation pressure
means the maximum cold infla­
tion pressure to which a t ire may
be inflated. Also called "maxi ­
mum inflation pressure."
Normal occupant weight
means 150 lbs. (68 kilograms)
times the number of occupants
seated in the veh icle up to the to­
tal seating capacity of your vehi­ c le.
Occupant distribution
means distribution of occupants
in a vehicle.
Outer diameter
means the overall diameter of an
inflated new tire.
Overall width
means the linear distance be­
tween the exteriors of the side­
walls of an inflated tire, including elevations due to labeling, deco ­
rations, or protective bands or
ribs .
Wheels
Ply
means a layer of rubber-coated
parallel cords .
Production options weight
means the combined weight of
those installed regular production
options weighing over 5 lbs. (2.3 kg) in excess of those standard
items which they replace, not pre­
viously considered in curb weight
or accessory weight, including heavy duty brakes , ride levelers,
roof rack, heavy duty battery, and
special trim .
Radial ply tire
means a pneumatic tire in which
the ply cords that extend to the beads are laid at substantially 90
degrees to the centerline of the
tread.
Recommended inflation
pressure
see ~ page 220, Cold tire infla­
tion pressure .
Reinforced tire
means a tire designed to operate
at higher loads and at higher in­
flation pressures than the corre­ sponding standard tire. Rein ­
forced tires may be identified as .,.
221