2015 AUDI RS5 CABRIOLET warning light

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co ,...., \!) 1.1'1 ,...., 1.1'1 ,....,
pressure relie f valve in the cap when the en­
gine becomes hot.
A WARNING
- The cooling system is under pressure and
can get very hot. Reduce the risk of
sca lding from hot coolant by following
these steps .
- T urn off the engine and a llow it to cool
down.
- Protect your face, hands and arms from
escap ing flu id and steam by cover ing
the cap with a large, thick rag.
- Tu rn the cap slowly and very ca refully
in a counte r-clockw ise d irection while
applying light, downward p ress ure on
the top of the cap.
- To avo id being burned, do not sp ill an­
tifreeze or coolant on the exhaust sys­
tem or hot engine parts. Under certain
conditions, the ethylene glyco l in en­
g ine coolant can catch f ire.
- Antifreeze is poisonous. Always store an­
t ifreeze in its or iginal container and we ll
out of the reach of children.
- If you drain the coolant, it must be
caught and safely stored in a proper con­
tainer clear ly marked "poison".
Q) Note
- Do not add any type of radiator leak sea l­
ant to your veh icle's engine coolant.
Adding rad iator repair fluid may adverse­
l y affect the function and performance of
you r cooling system and could result in
damage not covered by your New Vehicle Limited Wa rra nty.
- Coolant pollutes the env ironment and
could cause an engine fire. Excess coo l­
ant w ill be forced ou t through the pres­
su re re lief va lve in the cap when the en­
gine becomes hot .
- If, in an emergency, only water can be
added, t he cor rect ratio between wate r
and an tifreeze<=> page 201 must be re ­
stored as soon as possib le .
Checkin g and fillin g 203
'
@) For the sake of the environment
Drained coolant sho uld not be reused. A l­
ways d ispose of used coolant while observ­
i ng a ll environmental regulations.
Radiator fan
The radiator fan switches on automatically by
itself .
T he radiator fan is dr iven by the engine via the
V-belt. The viscous clutch regulates the speed
of the fan according to the temperature of the coolant.
An a uxiliary electric radiator fan* switches on
and off depending on coolant temperature
and othe r vehicle ope rat ing cond it ions.
After yo u switch the eng ine off, the aux iliary
f an can continue running for up to 10 m inutes
- even with the ignition off. It can even switch
on again later by itself<=>.&. , if
- t he temperatu re of the engine coo lant rises
due to the heat build -up from the engine in
the engine compa rtment, or
- the engine compa rtment heats up because
the vehicle is parked in intense sunlight.
A WARNING
=
- To reduce the risk of personal inju ry nev-
er touch the radiator fan.
- The a uxiliary electric fan is tempe rat ure
contro lled and can switch on suddenly
even when the engine is not running.
- The a uxiliary radiator fan switches on a u­
tomatically when the engine coo lant
reaches a certain temperature and will
continue to run until the coo lant temper­
ature drops.
•
•

204 Checking and filling
Brake fluid
Checking brake fluid level
The brake fluid level can be checked with a
quick glance .
N N ~ N
" (X) (0
Fig. 179 Engine compartme nt: Cover on the brake flu ·
id reservo ir
Before you check anything in the engine com­
partment,
a lwa ys re ad and heed all WARN·
ING S ¢.&._ in Working in the engine compart­
ment on page 195 .
.. Read the brake fluid level from the brake
fluid reservoir
¢ fig . 179 , ¢page 197,
fig . 174.
The brake fluid level must be be ­
tween the "MIN" and
"MAX" markings.
The brake fluid reservoir is located at the rear
partition of the engine compartment on the
left side
¢ page 197.
The fluid level may drop slightly after some
time due to the automatic adjustment of the
brake pads. This is not cause for alarm.
If the brake fluid level falls
considerably be­
low the "MIN" mark, the brake warning/indi­
cator light (U.S. models:
11111 , Canadian
models :. ) will come on
¢page 15. Do not
continue to operate the vehicle. The complete brake system should be thoroughly checked
by an authorized Audi dealer or qualified
workshop and the cause corrected .
If the
brake fluid level is too low, the brake warn ing/
indicator light w ill illuminate. Contact an au­
thorized Audi dealer
immedi atel y.
@ Tips
The brake fluid reservoir is located under­
neath the cover.
Changing brake fluid
Have the brake fluid changed by an experi­
enced technician .
Brake fluid absorbs moisture from the air. If
the water content in the brake fluid is too
high, corrosion in the brake system may result
after a period of time . The boiling point of the
brake flu id will also decrease conside rably and
decrease braking pe rformance.
Therefore, the brake fluid must be changed
every two year s. Always use new brake flu id
which conforms to Federal Motor Veh icle
Standard "F MVSS 116 DOT 4".
The brake fluid reservoir can be diff icult to
reach, therefore, we recommend that you
have the brake fluid changed by your author­
ized
Audi d ealer . Your dealer has the correct
tools, the right brake fl uid and the know -how
to do this for you .
A WARNING
- Brake fluid is poisonous . It must be stor­
ed only in the closed original container
out of the reach of children!
- Brake failure can resu lt from o ld or inap­
propriate brake flu id. Observe these pre­
cautions:
- Use only brake f luid that meets SA E
specifica tion
J 1 7 03 and conforms to
Federa l Moto r Ve hicle Standard 1 16.
Always check with yo ur authorized Aud i
dealer to make sure yo u are using the
correct brake fluid. The correct type of brake f lu id is also indicated on the
brake fluid reservoir.
- The brake fluid must be new. Heavy use
of the brakes can cause a vapor lock if
the brake fluid is left in the system too
l ong. This can seriously affect the effi­
c iency of the brakes as well as your
safety. This cou ld resu lt in an accident.
(D Note
Brake fluid will damage the paint of your
vehicle .

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@ For the sake of the environment
Because of the pr oblem of proper d isposa l
of brake flu id as we ll as the special tools
requ ired and the necessary expert ise, we
recommend that you have the brake fluid
changed by your author ized Audi dealer .
Battery
General information
Under normal operating conditions, the bat­
tery in your Audi does not need any mainte ­
nance. With
high outside temperatures or
long daily dr ives we recommend that you have
the electro lyte level checked by an authorized
Aud i dealer or qualified workshop . The elec­
trolyte leve l should also be checked each time
the battery is charged c>
page 207.
Have the battery checked when you take your
ve hicle in for service . You are well adv ised to
replace a battery that is older than 5 yea rs .
W ith certa in types of a irbag deployment, t he
battery is d isconnected from the vehicle elec­
tr ica l system for safety reasons c>
.&. in Re­
pair, care and disposal of the airbags on
page 144.
Disconnecting the battery terminals
Some vehicle functions (power w indow regu­
lators, for example) are lost if the battery ter­
m inals a re d isconnected. These func tions have
to be re lea rned after the batte ry term inals a re
connected agai n. T o prevent this, the bat tery
should only be d isconnec ted from the vehicle
e lec tric al system when absolu tely necessa ry
for repairs .
Vehicles not driven for long periods
If you do not drive you r vehicle over a period
of severa l days or weeks, elec trical compo­
nen ts are gr adually cut b ack o r swi tched off .
This redu ces energy cons umption and main­
tains starting capab ility over a longer per io d
c> page 177.
Some o f the conven ience f unctions m ay not
ope rate, su ch as the in ter ior lig hts or t he
Checkin g and fillin g 205
power seat adjus tment. The convenience
funct io ns w ill be available again when yo u
turn o n the ign ition and start the engine.
Winter operation
D ur ing the w inte r mon ths, bat tery capa city
tends to dec rease as tempera tures drop . This
is beca use more power is a lso consumed wh ile
starting, and the headlights, rear window de­
fogger, etc., are used more often.
Avoid unnecessary powe r consumpt ion, pa r­
ticular ly in city traffic or when traveling only
sho rt distances. Let yo ur authorized A udi
dealer check the capacity of the vehicle bat ­
tery before w inter sets inc>
page 207. A well
charged battery will not on ly prevent starti ng
problems w hen the weather is cold, but w ill
also last longer.
@ Tips
If your vehicle is left standing for seve ral
weeks at extremely low temperatures, the
vehicle battery s hou ld be removed and
stored where it will not freeze . This will
p revent it from be ing damaged and having
to be repla ced.
Working on the battery
Be especially careful when working on or near
the bat tery.
The battery is located in the luggage compar t­
ment under the floor . B efo re you che ck any­
thi ng in the luggage compartment,
read and
heed all WARNINGS
c> ,&. .
Always heed the safety warnings , when work­
i ng on the veh icle batte ry or t he vehicle e lec­
t rical sys tem to p reven t inju ry.
The following WARNINGS are very
important when working on the battery:
Always heed the following WARNING SYM· BO LS and safety precautions when working
on the battery .
®
Always wear eye protection.
•
•

206 Check ing and filling
&
Batter y aci d contain s sulfuric acid . Al·
w ays we ar glo ves and e ye prote ction .
@
No
- spar ks
- flam es
- smoking .
~
When a battery i s ch arg ed , it p roduce s
h y d rogen ga s whi ch i s ex plosi ve and
c ould c au se per sonal inju ry.
®
Alwa ys keep the battery well out of
r ea ch of children .
A WARNING
Whenever working on the battery or on
the electrical system, there is the risk of
injury , acc ident and even fire. Read and
heed the following WARNINGS:
-Always wear eye protection. Do not let battery acid or any lead part icles get on
your sk in or cloth ing . Sh ield your eyes .
Explosive gases can cause blindness or
other injury .
- Battery acid contains sulfur ic acid . Sulfu­
ric acid can cause blindness and severe
burns.
- Always wear gloves and eye protection.
Do not tilt the battery because ac id
could leak out of the vent ilation open­
ings.
- If you get battery acid in yo ur eyes or
on your sk in, immediately rinse with
cold water for severa l minutes and get
medical attention .
- If you should ingest any battery acid,
seek medical attention immediately.
- Do not expose the battery to an open
flame, electric sparks or an open light.
- Do not smoke.
- Do not interchange the positive and neg -
ative cab les.
- When working on the battery, be sure
not to short-circuit the terminals with
tools or other metal objects. This would
cause the battery to heat up very quickly,
wh ich could lead to damage or explosion
and personal injury.
-
- When a battery is charged, it produces
hydrogen gas which is explosive and
could cause personal injury.
- Always keep the battery well out of the
reach of children.
- Before work is done on the electrical sys­
tem, disconnect the negat ive ground ca­
ble.
- Before performing any work on the e lec­
trica l system, switch off the engine and
ignit ion as well as any electrical equip­
ment. The negative cable on the battery
must be disconnected .
If you are just go­
ing to replace a light bulb, then it is
enough to swi tc h off the lights.
- Before disconnecting the battery, switch
off the anti-theft alarm system! Other­
wise you wi ll set off the alarm.
- When disconnecting the battery, f irst
d isconnect the negat ive cab le and then
the posit ive c ab le.
- Before reconnecting the batte ry, ma ke
sure all e lectr ica l consumers are sw itch­
ed off. Re connect the pos it ive cable first
and then the negative cable. Never inter ­
change the cables - this could start a fire!
- Never charge a frozen or a thawed-out
battery. It could exp lode! If a battery has
frozen, then it must be replaced . A dis­
charged battery can freeze over at 32°F
(QOC).
- Make sure the vent hose is always attach­
ed to the opening on the s ide of the bat­
tery.
- Never use batteries which are damaged.
There is the danger of an explosion! Al­
ways rep lace a damaged battery.
A WARNING
Ca lifornia Proposition 65 Warning:
- Battery posts, terminals and related ac­
cessories conta in lead and lead com­
pounds, chemicals known to the State of
California to cause cancer and reproduc­
tive problems . Wash hands after han-
dling.
~

208 Check ing and filling
- To r educe the danger of explosion, never
co nnect or disconn ect cha rger cables
wh ile the c harger is operating.
- Fast char ging a battery is dangerous and
shou ld on ly 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 ­
tralize the acid.
(Q) Note
Never use a fast charger as a booster to
start the engine . This will seriously dam­
age sensitive electronic components, such
as control units, relays, rad io, etc., as we ll
as the battery charger.
Battery replacement
The new battery must have the same specif/·
cations and dimensions as the original equip­
ment battery.
Intell igent energy management in your veh i­
cle is respons ible for d istributing the e lectr i­
cal energy throughout you r vehicle
q page 177. The intell igen t energy m anage­
men t system w ill keep the engine ba tte ry
charged better then vehicles w ithout this sys­
tem . To make sure the additional e lectrica l en­
ergy is available once again after you have
changed the battery, we recommend that you install batteries o f the same type and ma nu­
facture only (the same as those installed at
the time your vehicle was delivered). Specifi­
cations are listed on the battery hous ing. Your
author ized Audi dealer must code the battery
in the ene rgy management system to enable
you to use the energy management functions
correctly after replac ing the battery.
I f it is not poss ible to use a battery of this
type, the new bat tery m ust h ave the s ame ca­
pac ity, voltage ( 12-volts), amperage, con ­
struction and plug sea ling. When installing the battery, make su
re the ig ­
nition and a ll electrical consumers are turned
off.
(D Note
Make sure the ventilation hose on the side
of the battery is connected, otherwise
fumes or battery acid can leak out .
@ For the sake of the environment
Because o f the p rob lem of p roper disposal
of a battery, we recommend your author ­
i zed Audi 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 all environmental
regulations. Dispos ing of vehicle batter ies
i mprope rly is very dange rous to the envi­
r o nment .
Windshield/headlight*
washer container
Fig. 181 En gin e compa rt m en t: Cove r on the w ind·
s h iel d a nd h eadligh t• was her fluid conta in er
.., N
-~ (X) a,
The washer fluid conta iner is marked w ith the
symbol
O on its cap q fig . 181, qpage 197,
fig . 174 .
.. Before yo u check any thing in the engine
compa rtment,
always read and heed all
WARNINGS q A in Working in the engine
compartm ent on page 195 .
.. Lift the fi ller cap tongue to add washer flu­
id. You can f ill the container to the top.
.. Press the cap back onto the filler neck after
fi lling the conta iner .
You can find the reservo ir
capacity in the table
in
q page 262. .,.

Tires and wheels 223
were on your vehicle at the changing a wheel or replacing •
time it was manufactured. For wheels you have to adjust the • '
recommended tire pressures tire pressures on all wheels. In
for normal load conditions, addition, you must then initial-
please see chapter ize the new tire pressures in the
9page 217. tire pressure monitoring sys-
-Turn the valve stem cap coun- tern*
9 page 239.
ter-clockwise to remove it
_&. WARNING
from the tire valve.
Incorrect tire pressures and/
-Place the air pressure gauge or underinflation can lead
on the valve. sudden tire failure, loss of
-The tire pressures should only control, collision, serious per-
be checked and adjusted when sonal injury or even death.
the tires are cold. The slightly -When the
[IJ warning sym-
raised pressures of warm tires bol appears in the instru-
must not be reduced. ment cluster, stop and in-
-Adjust the tire pressure to the spect the tires.
load you are carrying. -Incorrect tire pressure and/
-Reinstall the valve stem cap or underinflation can cause
on the valve. increased tire wear and can
When should I check the tire affect the handling of the
pressure? vehicle and stopping ability.
The correct tire pressure is es- -Incorrect tire pressures
pecially important at high and/or underinflation can
speeds . The pressure should also lead to sudden tire fail-
therefore be checked at least ure, including a blowout
once a month and always be -and sudden deflation, caus-
fore starting a journey. ing loss of vehicle control.
When should I adjust the
-The driver is responsible for
the correct tire pressures for
tire pressures?
M all tires on the vehicle. The N
er Adjust the tire pressure to the u..
applicable pressure values ... co ,....,
load you are carrying. After \!) 1.1'1 ,...., 1.1'1 ,....,

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Warning symbol s
ti] Loss of p ressure in at least one tire c::> ,&. .
Check the tire or tires and replace o r repair if
necessary . The indicator light
ti] in the instru­
ment cluster also illuminates
c::> page 13.
Check/correct the pressures of all four tires
and reset TPMS v ia radio or MMI*.
liif:I ( T ire Pressure Monitoring System) Ti re
p ressu re : Sys tem malfun ction !.
Ifffi:m appears after sw itching the ign ition on
or while driving and the indicator light
ti] in
the instrument cluster blinks for approxi­
mate ly one min ute and then stays on, there is
a system malfunction. Attempt to store the
correct t ire pressure
c::> page 241. If the ind i­
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
i zed repair facility to have the malfunction
corrected.
_& WARNING
- If the t ire pressure indicator appea rs in
the instrument cl uster display, one or
more of you r 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
c::> page 217. Driving o n a
signific antly under-inflated tire ca uses
the tire to overhea t and can lead to tire
f ailure. Under-inflation also is likely to
impair the vehicle's handling and stop­
ping ability.
- The driver is responsible for maintaining
the correct tire pressures . You must
check the t ire pressures regular ly.
- Under certain cond itions (such as a spor ­
ty driving style, w inter condit ions or un­
paved roads), the pressure monitor ind i­
cator may be de layed.
-Ask your authorized Audi dealer if run­ flat tires may be used on your veh icle.
Tire s an d wheel s 241
(D Tips
-The tire pressure monitor ing system may
stop working when there is an ESC ma l­
function.
- Using snow c hains may res ult in a system
ma lf u nction.
- The tire pressure mon itoring system on
your Audi was deve loped using tires with
the "ROl" identificat ion on the tire side­
wall
c::> page 230. We recommend using
these tires.
Reset tire pressure monitoring system
App lies to vehicles : wit h tire p ress ure mo nitor ing system
If the tire pressure is adjusted, wheels ore ro­
tated or changed, the TPMS must be reset via
radio or MM!*.
.,. Before storing the new t ire pressures, check
that the current pressures on all four tires
correspond to the specified va lues and
adapt the pressures to the current load
c::> page 217 .
.,. Switch on the ignition.
.,. Select: the
I CARI fu nct ion button > Tir e pre s­
sure monitoring
> Store now . Or
.,. Select: the
I CAR I fu nction button > Car s ys­
tem s*
contro l butto n > Servicing & checks >
Tire p ressure monitoring > Sto re tire pres ­
sures
> Yes , store now .
(D Tips
Do not store the tire pressure if there are
snow cha ins on the tire. Otherwise, a sys­
tem malfunction may occur.
•
•

24 2 What do I do n ow ?
What do I do now?
Vehicle tool kit
The tools ore stored underneath the floor
panel in the luggage comportment.
Fig. 188 Luggage compartment: tool kit
When you need access to the vehicle too l kit
or jack*, you will need to take out the cover.
The vehicle tool kit includes:
- Tire repair kit (Tire Mobility System)
- Plastic cl ip for removing wheel bo lt caps*
- Alignment p in fo r cha nging the whee l
- Screwdriver with reversible blade
- Tool for chang ing light bulbs
- Reversible bit (reversible Torx bit for chang-
ing light bu lbs)
- Rod for jack
- Jack *
- Lug wrench
- T owing eye
Some of the ve hicle it ems listed above a re
p rov ided on certain models on ly or are opt io n­
a l extras.
Before returning the jack * to its place, retract
the jack arm fully .
.&, WARNING
- Never use the screw driver hex head to
t igh ten whee l bolts, s in ce the bolts can­
not at tain t he necess ary tightening tor­
que i f yo u use the hex head, potentially
causing an accident .
- T he factory -supplied ja ck is intended on ­
ly for your vehicle model. Under no cir ­
c u mstances should it be used to
lift
heavy vehicles or othe r loads; yo u risk in­
juring yo urself .
- Never start the engine when the vehicle
is raised, wh ich could cause an acc ident.
- Support the vehicle securely wit h app ro­
priate stands if work is to be performed
unde rneath the vehicle; otherwise, there
is a potentia l risk for injury.
Tire repair
General and safety pointers
Tire repair is intended only for temporary,
short-term use.
F ig . 1 89 Tire damage for wh ic h the Tire Mob ility Sys­
tem is not suited
Your vehicle is equipped with a tire repa ir k it,
the
Tire Mobility System (TMS ).
In the event of a tire failure, the TMS is in the
luggage compartme nt under the floor. It con­
s ists of the tire sealant and an e lectric air
pump .
U sing
T MS , tire damage caused by foreign
bodies up to abo ut
0.16 inch (4 mm ) in diam­
eter can be sea led reliably.
T he foreign object must stay in the tire .
The t ire sealant must not be used:
- for cu ts or pun ctures in t he tire wh ich a re
larger than 0 .16 inch (4 mm)
¢ fig. 189 @
-for damage to the rim @
- if you have been driving with very low ti re
p ressures or tires wi th no air@
U sing the
TMS is described in the section
¢ page 243.