ignition AUDI S6 2013 Repair Manual

Checking and filling Engine hood
Releasing the engine hood
The engine hood is released from inside the
vehicle .
Fig. 182 Dr iver footwell: release leve r
Fig. 183 Rocker switch under the hood
Make sure the wiper arms are not raised up
from the w indshield. Otherw ise the paint
could be damaged.
.. Pull the lever under the instrument panel in
the d irect ion of the arrow
<=> fig. 182.
.. Raise the hood slightly <=>_& .
.. Press the rocke r switc h under the hood up­
ward
<=> fig. 183 . This re leases the catch .
.. Open the hood .
A WARNING
Hot engine coo lant can burn you.
- To reduce the r isk of being burned, never
open the hood if you see or hear steam
or coolant escaping from the engine
compartment . Wait until no steam or
coolant can be seen or heard before care­
fully opening the hood.
Checkin g and fillin g 225
Working in the engine compartment
Be especially careful whenever you work in
the engine compartment.
Wh ene ve r y ou must perform an y wo rk in the
eng ine com pa rtm ent , for e xample checking
a nd filling diff ere nt fluids, th ere is a risk of
inju ry, burn s and accid ent s. To pr event per­
so nal injury alwa ys observe the foll owing
WARNING S. The engin e compartment of an y
v e hicle i s a h az a rdou s are a
<=> ,&.
h WARNING
To help avoid injury, be fore yo u check any ­
thing under the hood:
- Turn off the engine .
- Sw itch off the ignition .
- Apply the parki ng brake.
- Move selector leve r to P (Park) .
- Always let the engine cool down. Hot
components w ill burn skin on contact .
- To reduce the risk of being burned, never
open the hood if you see or hear steam
or coo la nt escaping from the engine
compa rtment. Wait unt il no steam or
coolant can be seen o r heard before care­
fu lly opening the hood.
- Keep ch ildren away from the engine com­
pa rtment.
- Never sp ill fluids on hot engine compo­
nents . They can cause a fire .
- Never touch the rad iator fan. The auxili­
ary electric fan is temperat ure controlled
a nd can sw itch on suddenly .
- Never open the coolant reservoir cap
when the engine is still warm . The cool­
a nt system is p ressu rized and hot cool­
a nt cou ld spray o ut.
- Protect your face, hands and arm from
steam or hot engine coolant by plac ing a
thick rag ove r the cap when you open the
coo lant rese rvoir.
- Do not remove the engine cover under
any circumstances. This inc reases the
ris k of burns.
- If work on the fue l system o r the elec tri ­
cal system is necessary:

226 Check ing and filling
- Always disconnect the battery.
- Never smoke or work near heaters or open flames . Fluids in the engine com­
partment could start a fire.
- Keep an approved fire extinguisher im­
mediately available.
- To avoid electrical shock and persona l in ­
jury 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 repa ir
with the engine running:
- Fi rst, fully apply the parking bra ke,
move se lec to r lever to P (Pa rk) .
- Always use extreme caution to preven t
clot hing, jewe lry, or long h air from ge t­
ting caught in the radiator fan, V -belts
or other moving parts, or from contact­ ing hot parts. Tie back hair before
start ing, and do not wear cloth ing that
will hang or droop into the eng ine.
- Min imize exposure to emission and
chemica l hazards¢ ,&..
A WARNING
California Propos ition 65 Warning:
- Engine exhaust, some of its constituents,
and certa in veh icle components conta in
or emit chemicals known to the State of
Califor nia to cause cancer and b irth de­
fec ts a nd reproduct ive ha rm. In addition,
certain fluids conta ined in vehicles and
certa in prod ucts of co mponent wear co n­
ta in o r emi t chemicals known to the
State o f Ca lifornia to cause can cer and
birth defects or ot her reproductive harm. -
Battery posts, terminals and re lated ac­
cessories conta in lead and lead com­
pounds, chemicals known to the State of
California to cause cance r and reproduc­
tive harms. Wash hands after handling .
(D Note
When adding flu ids, always make sure that
they are poured into the proper conta iner
or f iller opening, otherwise serious dam­
age to vehicle systems w ill 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 ve hicle flu­
i ds, have yo ur vehicle inspected by a n au­
thori zed Audi dea le r.
Closing the engine hood
.,. Pull the hood down un til the pressure from
t he struts is reduced.
.,. Let the hood drop down and latch in p lace .
Do not try to push it shut; it may fail to en­
gage ¢&_ .
A WARNING
-
A hood that is not completely latched
could fly up and b lock your view while dr iv­
ing.
- When you close the engine hood, check it
to make sure the safety catch has p roper­
ly engaged. The hood sho uld be flush
with the surrou nding vehicle body pa rts.
- If you notice while driv ing t hat the hood
is not s ecured prope rly, stop at onc e and
close it.

230 Checking and filling
Checking the engine oil level
Fig. 185 Disp lay: o il level indica tor
• Park your vehicle on a level surface.
• Shut the engine off when it is warm.
• Switch only the ignition back on.
• Wait approximately two minutes.
• Select:
ICARI function button> (Car)* sys­
tems
control button > Servicing & checks >
Oil level.
• Check the oil level in the display c::> fig. 185.
Add engine oil if the bar of the oil level indi­
cator is near "min"
c::> page 230.
Depending on the way the vehicle is driven
and the operating conditions, oil consumption
can be up to 1/2 quart per 600 miles (0.5 liter
per 1,000 km) . Consumption may be higher
within the first 3,000 miles (5,000 km).
@ Tips
The oil level indicator in the MMI Display is
only an information display. If the oil level
is low, a minimum oil warning appears in
the instrument cluster. Add oil
c::> page 230. If the hood has been opened,
the current oil level is shown in the instru­
ment cluster the next time the ignition is
switched on .
Adding engin e oil 't:::r.
Fig. 186 Engine compart men t: cover on the engine oil
fille r neck
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 225.
• Unscrew the cap 't=1'l to the engine oil filling
hole
c::> fig . 186, c::> fig. 184.
• Carefully top off with the appropriate oil in
0.5 liter doses.
• Check the oil level again after two minutes
<=:>page 230.
• Top off the oil aga in, if necessary.
• Screw the cap back on the filling hole.
A WARNING
-- While topping off, the oil must not come
in 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 oil, you must subsequently
cleanse it thoroughly.
(D Note
- Check the oil level using the MMI. If the
message
Please reduce oil level appears,
contact your authorized Audi dealer or
other qualified workshop to have excess
oil extracted if necessary.
-Audi does not recommend the use of oil
additives. They may damage the engine ..,_.

232 Check ing and filling
Engine cooling system
Coolant
The engine coolant performs two functions: it
keeps the engine from overheating and it pro ­
tects the engine from freezing in the winter .
The cooling system is sealed and generally re­
quires little attention.
The cooling system has been filled at the fac­
tory with a permanent coolant which does not need to be changed. The coolant consists of a
mixture of water and the manufacturer's gly ­
col-based coolant additive Gl3 ant ifreeze
with ant icorros ion add itives (50% for USA
models; 60% for Canad ian models). This mix­
ture both assu res the necessary frost protec­
tion and protects metal components in the
engine's cooling system from corrosion and
scaling. It also raises the boiling point of the
coolant.
Do not reduce the concentration o f the coo l­
ant in the summer by adding plain water .
The
propo rtion of coolant add it iv e mu st be at
l eas t 50 % but not mo re than 6 0%
to main­
tain antifree ze protection and cooling efficien­
cy. If the coolant frost protect ion is too low,
the coolant could freeze and damage the veh i­
cle heating and eng ine cooling system .
For year-round driving, antifree ze is added at
the factory for temperatures down to:
- -31°F(-35°C)USA
- - 40 ° F ( -40 °C) Canada.
A WARNING
Before yo u check anything in the engine
compartment, always read and heed all
WARNINGS
c:> &. in Working in the engine
compartment on page 225.
- Before winter sets in, have the coolant
checked to see if the coo lant addit ive in
your vehicle is suffic ient to meet the cli­
mate cond itions. Th is is especially impor­
tant if you live in a region where the w in- ter is extreme
ly cold . If necessary, in ­
crease the proportion of coo lant additive
to 60%.
- When adding coolant additive to your
cooling system, remember:
- We recommend us ing only coolant ad­
d itive Gl2++ or G l3 (check the labe l)
fo r your vehicle. This coolant additive is
ava ilable at a utho rized Aud i dea le rs.
Other types of antifreeze can sign ifi­
cantly reduce corros ion protection. The
res ulting corrosion can cause a loss of
coolant and serious engine damage.
- Do not add any type of radiator leak seal ­
ant to yo ur vehicle's engine coolant .
Add ing radiator repair flu id may adverse­
ly affect the function and performance of
your cooling system and could resu lt in
damage not covered by your New Veh icle
Limited War ranty.
Checking the engine coolant level
The engine coolant level can be checked with
a quick glance .
Fig. 1 87 Engin e compar tmen t: cover on t he coo la nt
expansio n ta nk
Before you check anyth ing in the engine com­
partment,
alwa ys read and heed all WARN­
I NGS c:> &. in Working in the engine compart ­
ment on page 225 .
.. Park your vehicle on a level surface .
.. Switch off the ignition.
.. Read the engine coolant level from the
coola nt expansion tank
c:> fig . 187,
c:> fig. 184 . With a cold engine, the coolant
level shou ld be between the "min" and
"max" markings. When the eng ine is wa rm, ..,.

234 Checking and filling
scalding from hot coolant by following
these steps .
- Turn off the eng ine and a llow it to cool
down.
- Protect your face, hands and arms from escaping flu id and steam by cover ing
the cap with a large, thick rag .
- Turn the cap slowly and very carefully
i n a counter-clockwise direction while
apply ing l ight, downwa rd 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
gine coolant can catch f ire .
- Antifreeze is poisonous . Always store an­
tifreeze 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".
@ Note
- Coolant po llutes the env ironment and
could cause an engine fire . Excess coo l­
ant will be forced out through the pres­
sure re lief valve in the cap when the en­
gine becomes hot.
- If, in an emergency, on ly water can be
added, the correct ratio between water
and antifreeze
c::> page 232 must be re­
stored as soon as possible .
@ For the sake of the environment
Drained coolant should not be re used. Al­
ways dispose of used coolant while observ­
ing all environmental regulat ions .
Radiator fan
The radiator fan switches on automatically by
itself
An auxiliary e lectr ic radiator fan switches on
and off depending on coolant temperature
and other vehicle operating cond itions. After you switch the engine off, the aux
iliary
fan can cont inue running for up to 10 minutes
- even w it h the ignition off. It can even switc h
on again later by itself
c::> .&. , if
- the temperatu re of the engine coo lant rises
due to the heat build-up from the engine in
the engine compartment, or
- the engine compartment heats up because
the vehicle is parked in intense sunlight.
A WARNING
-- To reduce the risk of persona l injury nev-
er touch the radiator fan.
- The a uxiliary electric fan is temperat ure
contro lled and can sw itch on suddenly
even when the engine is not running.
- The auxiliary radiator fan switches on a u­
tomatically when the engine coo lant
reaches a certain temperature and will
continue to run until the coolant temper­
ature drops .
Brake fluid
Checking brake fluid level
Fig. 1 88 En gin e compa rtme nt: cove r on t he brake fluid
reservoi r
Before you check anything in the engine com­
partment,
always read and heed all WARN­
INGS c:> A in Working in the engine compart­
ment on page 225.
.,. Read the brake fluid level from the brake
fluid reservoir
c::> fig. 188, c:> fig . 184. The
brake fluid level must be between the "MIN"
and "MAX" markings.
IJ>

236 Check ing and filling
Di sconnect ing the batt ery terminal s
Some vehicle functions (power window regu­
l ators, for example) are lost if the battery ter­
minals are disconnected . These functions have
to be re learned after the battery terminals are
connected again. To prevent this, the battery
should only be disconnected from the vehicle
electrical system when absolutely necessary
for repairs .
Vehicles not dri ven fo r lo ng period s
If you do not drive your vehicle over a period
of several days or weeks, electrical compo­
nents are gradually cut back or switched off.
This reduces energy consumption and main­
tains starting capab ility over a longer period
¢ page 19 7 . Some of the convenience func­
tions may not operate, such as the inte rior
lights or powe r seat adjustme nt. The conven ­
ience functions will be ava ilable again when
you switch on the ignition and start the en­
gine.
Winter operati on
During the winter months, battery capacity
tends to decrease as tempe ratures drop . This
is because more powe r is also consumed while
start ing, and the headlights, rear window de­
fogger, etc., are used more often.
Avoid unnecessary power consumption, par­
ticularly in c ity traffic or when trave ling on ly
short distances. Let your authorized Audi
dea ler check the capacity of the vehicle bat ­
tery before winter sets in
¢ page 237. A well
charged battery w ill not only prevent starting
prob lems when the weather is cold, but will
also last longer .
(D Tips
If your vehicle is left standing for several
weeks at extremely low temperatures, the
veh icle battery should be removed and
sto red where it will not freeze. This w ill
prevent it from being damaged and hav ing
t o be replaced.
Working on the battery
Be especially careful when working on or near
the battery.
The battery is located in the luggage compart­
ment under the floor. Before you check any­
th ing in the luggage compartment,
read and
h ee d all WARNINGS
¢ ,&,
Always heed the safet y warnings , when work­
ing on the vehicle battery or the vehicle e lec ­
trical system to prevent injury.
The following WARNINGS are very
important wh en wor king on the battery :
Alway s heed the following WARNING S YM­
BOLS and safety prec autions when working
on the battery .
®
Always wear eye protection.
Battery acid contain s sulfuric acid.
Alwa ys wear glove s and ey e protec­
tion.
No
- sparks
-flames
- smoking .
1
When a b atter y is charged, it pr odu­
ces hydrogen gas which i s ex plosive
and could cau se per sonal injury.
Always keep the battery well out of reach of children .
.&_ WARNING ~
Whenever working on the battery or on
the electrical system, there is the risk of
i njury, accident and even fire. Read and
heed the following WARNINGS:
- Always wear eye protection. Do not let
battery ac id or any lead particles get on
your skin or clothing. Shield your eyes. Exp losive gases can cause blindness or
other inju ry.
- Battery acid conta ins sulfuric acid. Sulfu­
ric acid can cause blindness and severe
burns.

-Always wear gloves and eye protection.
Do not tilt the battery because acid
could leak out of the ventilation open­
ings .
- If you get battery acid in your eyes or
on your skin, immediately rinse with
cold water for several 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 cables .
- 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,
which 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 negative ground ca­
ble.
- Before performing any work on the elec­ trical system, switch off the engine and
ignition 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 switch off the lights.
- Before disconnecting the battery , switch
off the anti-theft alarm system! Other­
wise you will set off the alarm.
- When disconnecting the battery, first
disconnect the negative cable and then
the positive cable.
- Before reconnecting the battery, make
sure all electrical consumers are switch­
ed off. Reconnect the positive cable first
and then the negative cable. Never inter­
change the cables - this could start a fire!
Checking and filling 237
- Never charge a frozen or a thawed-out
battery . It could explode! If a battery has
frozen, then it must be replaced. A dis­
charged battery can freeze over at 32 °F
(0 oc).
-Make sure the vent hose is always attach­
ed to the opening on the side of the bat­
tery .
- Never use batteries which are damaged.
There is the danger of an explosion! Al ­
ways replace a damaged battery .
A WARNING
California Proposition 65 Warning:
- Battery posts, terminals and related ac­
cessories contain lead and lead com­
pounds, chemicals known to the State of
California to cause cancer and reproduc­
tive problems . Wash hands after han­
dling .
(D Note
-Do not disconnect the vehicle battery
when the ignition is on or when the en­
gine is running, otherwise, you will dam­
age electronic components in the electri­
cal system.
- If your vehicle is going to stand for a
long period of time without being driven,
protect the battery from "freezing", oth­
erwise it will be damaged and will then
have to be replaced.
Battery charging
Start ing the engine requires a well charged
battery.
Fig . 189 Eng in e compart ment : co nnecto rs for a charg ·
e r and jump st art cable s
1111>

When the malfunction indicator is illuminat­
ed, the system may not be able to detect or
signal low tire pressure as intended. TPMS
malfunctions may occur for a variety of rea ­
sons, including the installation of replace­ ment or alternate tires or wheels on the vehi ­
cle that prevent the TPMS from function ing
properly . Always check the TPMS malfunction
tellta le after replacing one or more tires or
wheels on your vehicle to ensure that the re­
placement or alternate tires and wheels allow
the TPMS to continue to function properly.
Tire pressure indicator appears
Applies to vehicles: with tire pressure monitoring system
The tire pressure indicator in the instrument
cluster informs you if the tire pressure is too
low or if there is a system malfunction.
Fig. 196 Display : underinflatio n warning
Fig. 197 Display : Syste m malfun ctio n
Using the ABS sensors, the tire pressure moni ­
toring system compares the tire tread circum­
ference and vibration characteristics of the in­
dividual tires . If the pressure decreases in one
or more tires , th is is indicated in the instru­
ment cluster with a warning symbol
RE and a
message
¢fig . 196.
The tire pressure monitoring system must be
reset via MMI each time the pressures are ad-
Tires and wheels 259
justed (e.g. when switching between partial
and full load pressure) or after changing or re­
plac ing a tire on your vehicle¢
page 260. The
TPMS indicator only monitors the tire pres­
sure that you have previously stored. You can
find the recommended tire pressures for your
vehicle on the label on dr iver's side B-pillar
~page 244.
Tire tread circumference and vibration charac­
teristics can change and cause a tire pressure
warning if :
- the tire pressure in one or more tires is too
low,
- the tire has structural damage,
- the tire pressure was changed, wheels rotat-
ed or replaced but the TPMS was not reset
¢page 260.
Warning symbols
RE Loss of pressure in at least one tire¢.&. .
Check the tire or tires and replace or repair if
necessary. The indicator light
RE in the instru­
ment cluster also illuminates
¢ page 12.
Check/correct the pressures of all four tires
and reset TPMS via MMI.
11;;~, ( T ire Pressure Monitoring System) Tire
pressure! System malfunction.
If11NIS, appears after switching the ignition
on or while driving¢
fig. 197 and the indica­
tor light
RE in the instrument cluster blinks
for approximately one minute and then stays
on, there is a system malfunction.
Attempt to store the correct tire pressure
¢
page 260 . If the indicator light does not
turn off or if it turns on shortly thereafter, im­
mediately drive your vehicle to an authorized
Audi dealer or authorized repair facility to have the malfunction corrected .
A WARNING
-If the tire pressure ind icator appears in
the instrument cluster display, one or
more of your tires is significantly under­
inflated. Reduce your speed immediately
and avoid any hard steering or braking
maneuvers. Stop as soon as possib le and .,.

260 Tire s and wheel s
check the tires and their pressures. In­
flate the tire pressure to the proper pres­
sure as indicated on the vehicle's tire pressure label
c> page 244. Driving on a
significantly under-inflated tire causes
the tire to overheat and can lead to tire
failure. Under-inflation also is likely to impair the vehicle's handling and stop­
ping ability.
- T he driver is responsible for ma inta ining
the correct tire pressures. You must check the t ire pressures regular ly .
- Under certain cond itions (such as a spor­
ty driving s tyle, win ter condit ions or un­
paved roads), the pressure monitor indi ­
cator may be de layed .
- Ask your author ized Audi dealer if r un­
flat tires may be used on your vehicle .
You r vehicle regist ration becomes invalid
if yo u use these tires when not permit­
ted. Damage to your veh icle or accidents
cou ld also resu lt.
- The tire pressure monitoring system
stops wor king when there is an ESC/ABS
malfunction .
- Using snow chains may result in a system
malfunction.
- The tire pressure monitoring system on
your A udi was developed using tires with
the "AO" or "RO" identif ication on the
tire sidewall <:>page 251. We recom­
mend using these t ires.
Reset tire pressure monitoring system
App lies to vehicles: with tire pressure monito ring system
If the tire pressure is adjusted, wheels are ro­
tated or changed, the TPMS must be reset via
MMI.
., Switch on the ignition .
., Se lect in the MMI: !CAR !function button>
(Car )* syst ems contro l butto n > Serv icing &
checks > Tire pres sure mon itoring > Store
tire pre ssure s> Yes, store n ow .
(D Tips
Do not store the tire pressure if there are
snow cha ins on the tire .

272 Fuses and bulbs
Fuse panel @ (brown)
No. Equ ipment Amps
Climate control 10
Climate control system blower 40
3
D iagnost ic connec tor 10
4 Electrical ignition lock 5
5
Power s teer ing column adju st-
ment
5
6 Steering column switch module 10
7
Power steering column ad just -
ment
25
8 Light switch 5
Luggage compartment fuse assignment
F
ig . 2 13 Lu ggage compar tment: fuse pa nel w ith plas­
t ic bracket
Fu se panel A (black )
No. Equipment Amps
Electromechanical pa rking brake 30
Electraomechanical parking brake 30
6
Front door (front passenge r's
30 s ide)
7 Rear exterior lighting 30
Rea r su n shade, closing aid, lug-
8 gage
comp artment lock, con-
20
venience key, S TA RT E NGIN E
STOP, fuel fi ller door
9 Power seat adjustment 15
1 0
Pa rking system 5
11
Rear seat heating 30
Fuse panel @ (red )
No. Equipment Amps
1 Left belt tensioner 2 5
2 25
3
Socke t 20
4
Socket 20
5
Ele ctrome chanic al p arking b ra ke 5
6 adaptive air suspension 15
7
Rear door (fron t passenger's
30 side)
8 Rear exterior lighting
30
9
L
u ggage compartment lid con-
30 trol mod ule
Telephone
5
11
So und amplif ier 30
12
Rear spoiler (Sportback) 20
Fuse panel © (brown)
No . Equipment Amps
1 Radio receiver, Sound amplifier/ 3 0/ 20
MMI unit/dr ives
Tank lea k detec tion sys tem
5
4 AEM co ntrol module/battery 10/15
mo dule
Battery fan
35
Rad io rec eiver 7,5
7 ,5
9
Automatic dimm ing in terior 5/15
rea rv iew mirror /ba ttery m od ule
10 Parking system 5
Fuse panel @ (green)
No. Equipment Amps
1 Audi pre sense 5
2
Electromechanical parking brake 5
3 ad a pt ive air suspen sio n 5
4
Automatic transmission 7,5
5
Parki ng sys tem 5
6 Rear Seat Entertainment 5
7
Start -Stop-System 5
8 Audi side assist 5