2015 AUDI S4 radio

158 Airbag system
-Never attach any objects such as cu­
pholders or telephone mountings to the
surfaces covering the airbag units.
- For cleaning the horn pad or instrument
panel, use only a soft, dry cloth or one
moistened with plain water. Solvents or
cleaners could damage the airbag cover
or change the stiffness or strength of the
material so that the airbag cannot de­
ploy and protect properly.
- Never repair, adjust, or change any parts
of the airbag system .
- All work on the steering wheel, instru­
ment panel, front seats or electrical sys­
tem (including the installation of audio
equipment, cellular telephones and CB
radios, etc.) must be performed by a
qualified technician who has the training
and special equipment necessary.
- For any work on the airbag system, we
strongly recommend that you see your
authorized Audi dealer or qualified work­
shop.
- Never modify the front bumper or parts
of the vehicle body.
- Always make sure that the side airbag
can inflate without interference:
- Never install seat covers or replace­
ment upholstery over the front seat­
backs that have not been specifically
approved by Audi.
- Never use additional seat cushions that
cover the areas where the side airbags
inflate.
- Damage to the original seat covers or
to the seam in the area of the side air­
bag module must always be repaired
immediately by an authorized Audi
dealer.
- The airbag system can be activated only
once. After an airbag has inflated, it
must be replaced by an authorized Audi
dealer or qualified technician who has
the technical information, training and
special equipment necessary.
- The airbag system can be deployed only once. After an airbag has been deployed,
it must be replaced with new replace -ment parts designed and approved espe­
cially for your Audi model version . Re­
placement of complete airbag systems
or airbag components must be per­
formed by qualified workshops only. Make sure that any airbag service action
is entered in your Audi Warranty
& Main­
tenance booklet under
AIRBAG REPLACE­
MENT RECORD.
- In accidents when an airbag is deployed,
the vehicle battery separates the alterna­
tor and the starter from the vehicle elec­
trical system for safety reasons with a pyrotechnic circuit interrupter.
- Work on the pyrotechnic circuit inter­ rupter must only be performed by a
qualified dealer -risk of an accident!
- If the vehicle or the circuit interrupter
is scrapped, all applicable safety pre­
cautions must be followed.
@ For the sake of the environment
Undeployed airbag modules and preten ­
sioners might be classified as Perchlorate
Material -special handling may apply, see
www .dtsc.ca.gov/hazardouswaste/per­
chlorate. When the vehicle or parts of the restraint system including airbag modules
safety belts with pretensioners are scrap­
ped, all applicable laws and regulations
must be observed. Your authorized Audi
dealer is familiar with these requirements
and we recommend that you have your
dealer perform this service for you.
Other things that can affect Advanced
Airbag performance
Changing the vehicle's suspension system can
change the way that the Advanced Airbag Sys­
tem performs in a crash. For example, using
tire-rim combinations not approved by Audi, lowering the vehicle, changing the stiffness of
the suspension, including the springs, suspen­
sion struts, shock absorbers etc. can change
the forces that are measured by the airbag sensors and sent to the electronic control
unit. Some suspension changes can, for

192 Intelligent technology
to prevent excessive disc harge of the battery
and thus maintain starting capability.
Dynamic en ergy management
While the vehicle is be ing dr iven , dynamic en­
e rgy management distributes the energy gen­
erated accordi ng to the needs of the individu­
a l components . It reg ulates cons umption, so
that more electrical energy is not being used
than is being generated and ensures an opti ­
mal state of charge for the battery.
@ Tips
- But even energy management cannot
negate the limits o f physics. Consider
that the power and life of a battery are li mited .
- If starting ab ility is threatened, the indi­
cator light(•) appears ¢
page 16.
What you should know
The highest priority is given to maintaining
starting capabili ty.
The battery is severely taxed in short-distance
d riving, in city traffic and during the co ld time
of year. Abundant e lectr ica l energy is re ­
qu ired, but only a little is generated. It is also
cr itical if the engine is not run ning and electri­
cal components a re turned on . In th is in ­
stance energy is being consumed but none is be ing generated.
It is in precisely these situations that you w ill
notice energy management actively regulat ­
ing the distr ib ution of energy.
Vehicle stands for an extended period If yo u do not drive your vehicle over a period
of severa l days or weeks, electrical compo­
nents are gradually cut back o r switched off .
This reduces energy cons umption and mai n­
tains sta rting capab ility over a longer period .
Some of t he conve nien ce f unctions may no t
ope rate, su ch as the in ter io r l ights o r the
power seat ad justment. The convenience
f u nctions will be avai lable again when you
switch on the ignition and start the engine . With the engine turned off
If you
listen to the radio, for examp le, w ith
t h e engine t urned off or use other M MI func ­
tions, the battery is being discharged .
If s tarti ng capab il ity is jeopardi zed d ue to en­
ergy consumptio n, the following warning ap­
pears in the MM I display:
Pl ea se start the engine soon or the syst em
will be turned off .
The warning indicates that the system will be
tu rned off automatically after 3 minutes . If
you w ish to continue using the funct ions, yo u
have to sta rt the eng ine .
With the engine running
Althoug h electrical energy is generated when
the vehicle is being dr iven, the battery can be ­
come discharged. This happe ns mostly when
li ttle energy is being ge ne rated and a g reat
deal consumed and t he ba ttery's state of
c harge is no t opt imal.
To b ring the energy bala nce back into equ ili­
br ium, consumers wh ich requ ire espec ially
lar ge amounts of ene rgy a re temporar ily cut
ba ck or sw itched off. Heat ing systems in p ar­
t icu lar require a great deal of energy . If you
notice, for examp le, that the heated seats * or
the heated rear window are not heating, they
have been temporarily cut back or switched
off . These systems w ill be available again as
soon as the e nergy balance has been restored.
You w ill also notice that engine id le speed has
been increased slightly . T hi s is normal and not
a cause for concern. By increasing engine id le
speed the additional energy required is ge ner ­
ated and the battery is charged .

216 Checking and filling
-If you have the impression your engine
consumes excessive amounts of oi l, we
recommend that you consult an author­
ized Audi dealer to have the cause of
your concern properly diagnosed. Keep in
mind that the accurate measurement of
oil consumption requires great care and
may take some time . An authorized Audi
dealer has instructions about how to
measure oil consumpt ion accurately.
Checking the engine oil level
Fig. 183 MMI D isp lay : Oil leve l ind icator
Read oil level
.,. Park your vehicle so that it is horizonta lly
level.
.,. Shut the engine off when it is at operat ing
temperature .
.,. Switch only the ignition back on.
• Wait approx . two minutes.
• Se lect : Fu nct ion button
I _C_A_R_I > Oil level. Or
.,. Select : Function button
ICARI > Car sys-
tems* control button > Servicing & checks >
Oil level.
.,. Read the oil Level in the MMI* Display
c:> fig. 183. Add engine oi l if the bar of the
oil level indicator is near "min"
c:> page 216
Depend ing on the way the vehicle is driven
and the operating conditions, oil consumpt ion
can be up to a 1/2 quart per 600 mi les (0.5
li­
ter per 1,000 km) . Consumption may be high­
er within the first 3,000 miles (5 ,000 km).
(D Tips
The oil Level indicator in the MMI* Display
is only an information display . If the oil
Level is too Low, a minimum oil warning ap -pears in
the instrument cluster. Add oil
c:> page 216. If the hood has been opened,
the current oil level is shown in the instru­
ment cluster the next t ime the ignition is
switched on.
'e:;1: Adding engine oil
Fig. 184 Engin e compar tmen t: Cover on th e oil filler
neck
.,. Before you check anything in the engine
compartment,
always read and heed all
WARNINGS c:> .&. in Working in the engine
compartment on page 212 .
.,. Shut the engine off .
.,. Unscrew the cap
't'::71 to the engine oi l filling
hole
¢ fig. 184, c:>page 214, fig. 182 .
.,. Carefully top off with 0 .5 quarts (0 .5 liters)
of the appropriate oil
c:> page 214 .
• Check the oil level again after two minutes
r::;, page 216, Checking the engine ail level .
.,. Top off the oil aga in , if necessary .
.,. Screw the cap back on the filling hole .
_& WARNING
-While topping off, the oil must not come
i n contact with hot engine parts -fire
hazard!
- The oil filler cap must be properly se­
cured to prevent oil from being sprayed
on the hot engine and exhaust system
when the engine is running -fire hazard!
- If your skin has come in contact with the
engine o il, you must subsequently
cleanse it thoroughly.
(D Note
- Check the oil level using the radio or
MMI*. If the message Please reduce oil

"" N
0 ::.,: co ,...., \!) 1.1'1 ,...., 1.1'1 ,....,
-To r educe the danger of explosion, never
connect or disconnect charger cables
while the charger is operating.
- Fast charg ing a battery is dangerous and
should only be attempted by a compe­
tent technician w ith the proper equip­
ment .
- Battery acid that may spill during charg­
ing should be washed
off with a solution
of warm water and baking soda to neu ­
t ralize the acid .
Never use a fast charger as a booster to
start the engine . This will seriously dam­
age sensitive elect ronic components, such
as control units, relays, radio, etc. , as we ll
as t he battery charger.
Battery replacement
The new battery must have the same specifi­
cations and dimensions as the original equip­
ment battery.
Intell igent energy management in your veh i­
cle is respons ible for d istr ibuting the e lectr i­
cal energy throughout you r vehicle
¢ page 191. T he inte lligen t en ergy ma nage­
men t system w ill keep the engine b attery
charged be tter then vehicles w ithout this sys­
tem . To make sure t he additional e lectrica l e n­
ergy is available once again after you have
changed t he battery, we recommend that you
install ba tteries of the same type and man u­
facture only (the same as t hose installed at
the t ime your vehicle was delivered) . Specifi­
cations a re listed on the battery hous ing . You r
author ized Audi dealer must code the bat tery
in the energy management system to enable
you to use the energy management functions
correctly after rep lac ing the battery .
I f it is not poss ible to use a battery of this
type, the new bat tery mus t have the s ame ca­
pacity, vo ltage ( 12-volts), ampe rage, con­
struction and pl ug sea ling.
Checkin g and fillin g 225
When installing the battery, make su re the ig ­
nition and a ll electrical consume rs a re turned
off.
Q) Note
M ake sure the ven tilat ion hose on the side
of the batte ry is connecte d, otherwise
fumes o r batte ry acid can leak out .
@ For the sake of the environment
Because o f the p rob lem of proper disposal
of a battery, we recommen d your author­
i zed A udi dealer change the battery for
you. Batteries contain sulfur ic acid and
l ead and must always be disposed of prop­
erly in comp liance with a ll environmental
r egula tions . Dispos ing of vehicle batter ies
i mprope rly is v ery dange rous to th e envi­
r o nmen t.
Windshield/headlight*
washer container
Fi g. 18 8 Eng in e co mpartm en t: Cove r o n th e w ind­
s h iel d a nd headlig ht• was her fluid conta in er
T he was her fluid conta iner is mar ked w ith the
symbol
O on its cap ¢ fig . 188, ¢page 214,
fig . 182.
.. Before yo u check any thing in t he engine
compa rtment,
alwa ys re ad and heed all
WARNINGS ¢ & in Working in the engine
compartment on page 212 .
.. Lift the fi ller cap tongue to add washer flu ­
id. You can f ill the container to t he top.
.. Press the cap back o nto the fi lle r neck after
filling the co nta iner .
You can find the reservo ir
capacity in the table
in ¢
page 281. 111>
•
•

-If you notice unusual vibra­tion or if the vehicle pulls to one side when driving, al­
ways stop as soon as it is safe to do so and check the
wheels and tires for dam­ age.
(D Note
-Please note that summer and winter tires are de­
signed for the conditions
that are typical in those sea­
sons. Audi recommends us­ing winter tires during the
winter months. Low tem­ peratures significantly de­
crease the elasticity of
summer tires, which affects
traction and braking ability.
Tires and wheels 229
If summer tires are used in
very cold temperatures, cracks can form on the tread bars, resulting in perma­
nent tire damage that can
cause loud driving noise and unbalanced tires. Audi is not
responsible for this type of
damage.
-Burnished, polished or chromed rims must not be used in winter road condi­
tions. The surface of the
rims does not have suffi­
cient corrosion protection
for this and could be perma­
nently damaged by road salt
or similar substances.
•
•
'
Glossary of tire and loading terminology
Accessory weight
means the combined weight (in
excess of those standard items
which may be replaced) of auto­ matic transmission, power
steering, power brakes, power
windows, power seats, radio, and heater, to the extent that
these items are available as fac­
tory-installed equipment (whether installed or not).
Aspect ratio
means the ratio of the height to
the width of the tire in percent. Numbers of 55 or lower indi­
cate a low sidewall for im­ proved steering response and
better overall handling on dry
pavement.

'"" N
0 ::.,: co ,...., \!) ..,.,
,...., ..,., ,....,
-the spa re tire* /inflatable spare tire* is
mounted.
Warning symbols
[IJ Loss of pressure in at least one tire¢,&. .
Check the tire or tires and replace or repair if necessa ry. The indicator light
[IJ in the instru ­
ment cluster also illuminates
¢page 13.
Check/correct the pressures of all four tires
and resetTPMS via radio or MMI*.
mm (T ire Pressure Monitoring System) Ti re
pre ssure: S ystem m alfuncti on!.
1tE appea rs after sw itching the ign it ion on
or while d rivi ng and the ind icator light
[IJ in
the instrument cluster blinks for approxi­ mately one minute and then stays on, there is
a system malfunction. Attempt to store the
correct t ire pressure ¢
page 259. If the indi­
cator light does not turn off or if it turns on
shortly thereafter, immediately drive your ve­
h icle to an authorized Audi dealer or author­
ized repair facility to have the malfunction
corrected.
.&, WARNING
- If the t ire pressure indicator appears in
the instrument cl uster d isplay, one or
more o f your tires is significantly under­
inflated. Reduce your speed immediately
and avoid any hard steering or braking
maneuvers. Stop as soon as possible and
check the t ires and the ir pressures. In­
flate the tire pressure to the proper pres­
sure as indicated on the vehicle 's t ire
pressure label~
page 234 . Driving on a
significantly under-inflated tire ca uses
the tire to overhea t and can lead to tire
failure. Under-inflation also is likely to impair the vehicle 's handling and stop ­
ping ability.
- The driver is responsible for mainta ining
the correct tire pressures. You must check the tire pressures regularly .
- Under certain cond itions (such as a spor ­
ty driving style, winter conditions or un­ paved roads), the pressure monitor indi­
cator may be de layed .
Tire s an d wheel s 259
-Ask your a uthorized Audi dea ler if run­
flat tires may be used on your vehicle.
(D Tips
- The tire pressure mon itoring system may
stop working when there is an ESC ma l­
function.
- Using snow chains may res ult in a system
ma lfunction.
- The tire pressure mon itor ing system on
your Audi was deve loped using tires with
the "AO" or "RO" identification on the
tire s idewall
~ page 248. We recom­
mend us ing these tires.
Reset tire pressure monitoring system
App lies to vehicles: with tire pressure mon itor ing system
If the tire pressure is adjusted, wheels ore ro­
tated or changed, the TPMS must be reset via
radio or MMI*.
... Before storing the new tire pressures, check
that the current pressures on all four tires
correspond to the specified va lues and
adapt the pressures to the current load
¢ page 234.
.,. Switch on the ignition.
.,. Select: the
I CARI funct io n button > Tir e pre s­
s ure mon itoring
> Store now . Or
.,. Select: the
I CARI fu nct ion button > Car sy s­
tem s*
contro l button > S erv icing & che cks >
Tire pres sure mon itor in g > Store tire pre s­
s ures
> Yes, sto re now .
(D Tips
Do not store the tire pressure if there are
snow chains on the tire . Otherwise, a sys­
tem mal function may occur.
•
•

M N
~ co
rl I.O
"' rl
"' rl
Right cockpit fuse assignment
Fig. 209 Right cockpit: fuse pane l wit h plastic cl ip
Fuse panel @ (black )
No . Consumer
Amps
5 Steering
column switch
5
modu le
7
Termina l 15 d iagnostic con-
necta r 5
8
Gateway (Databus diagnos-
5
tic interface)
9 Supplementary heater 5
Fuse panel@ (brown )
No .
Consumer Amps
1 CD/DVD player 5
2 Wi-Fi
5
3 MMI/Radio 5/20
4 Instrument cluster
5
5 Gateway
(instrument cluster
5
control module)
6 Ignition lock
5
7 Light switch
5
8
Climate control system
40
blower
9 Steering column lock
5
Fuse s and bulb s 2 71
No. Consumer
10 Climate
control system
11 Te
rm inal 30 diagnostic con-
n ectar
12 Steer
ing column switch
module
Right luggage compartment fuse
assignment Amps
10
10
5
F
ig . 210 Right luggage compartment: fuse panel w ith
plast ic cl ip
Fu se panel @ (bla ck)
No . Consumer Amps
2 Rear window heater (Ca b
rio-
30
let)
3 Power
top latch (Cabriolet)
30
4 Power top hydraul ics (Cab-
so riolet)
Fuse pan el@ (black )
No. Consumer Amps
Luggage compartment lid
1 control
module (allroad)/
30/10
Power top contro l modu le
(Cabriolet)
2 Re
tractable rear spoiler
10
(RS 5 Coupe)

272 Fuses and bulb s
No. Consumer
5 Electromechanical parking
brake
6 Electronic damping control
7
Electromechanical parking
brake
8 Rear exterior lighting
9 quattro sport
10 Rear exterior lighting
11 Central locking
12 Terminal
30
Fuse panel © (brown)
No. Consumer
1 Luggage compartment lid
contro l module (allroad)
2 12-volt
socket, cigarette
lighter
3 DCDC converter path 1
4 DCDC converter path 2,
so und amp lifier, radio
6
Right upper cab in heat ing
(Cabr iolet)
7
Electromechanical parking
brake
Right front door (w indow
9 regu lator, central locking,
mirror, switch, lighting)
1 0 Left upper cabin
heating
(Cabr iolet)
T wo -door models : rear right
window regu lator; Four-
11 door models: rear r
ight door
(window regulator, central
locking, sw itch, lighting)
12 Cell phone prep
Fuse panel © (black)
No. Consumer
1 Right front seat heating
4
MMI
5 Radio
6 Rear view camera
Amps
5
15
30
30
35
30
20 5
Amps
30
20
40
30
30
30
30
30
30
5
Amps
15
7,5
5
5
No . Consumer Amps
7 Rear window heater (all-
30
road)
8 Rear Seat Entertainment s
Bulbs
Replacing bulbs
For your safety, we recommend that you hove
your authorized Audi dealer replace any bulbs
for you.
It is becoming increasingly more and more
difficult to replace vehicle light bulbs since in
many cases, other parts of the car must first
be removed before you are able to get to the
bulb. This applies especially to the light bulbs
in the front of your car which you can only
reach through the engine compartment .
Sheet metal and bulb holders can have sharp
edges that can cause serious cuts, parts must
be correctly taken apart and then properly put
back together to help prevent breakage of
parts and long term damage from water that
can enter housings that have not been p roper­
l y resea led.
For your safety, we recommend that you have
you r authorized Aud i dea ler replace any bulbs
for you, since yo ur dealer has the proper too ls,
the correct bulbs and the expertise .
Gas discharge lamp s (Xenon lights)*:
Due to the high electr ical voltage, have the
bulbs replaced by a qualif ied techn ic ian.
Headlights wit h Xenon light are identified by
the high voltage sticker.
_&. WARNING
Changing Xenon lamps witho ut the neces­
sa ry equipment can cause serious persona l
injury.
- Bulbs are pressurized and can explode
when being changed. Potential risk of in­
jury!
-