engine AUDI S6 2009 Owners Manual
[x] Cancel search | Manufacturer: AUDI, Model Year: 2009, Model line: S6, Model: AUDI S6 2009Pages: 398, PDF Size: 43 MB
Page 305 of 398

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• 
& WARNING 
B efo re you  c heck  anythin g  in th e  engine  comp artme nt, a lways 
r e ad  and  heed  all  WARNING S 
~ & in "Workin g in the  en gine 
co mp art m ent " o n page  301 . • 
Engine  oil 
Engine  oil  specifications 
The engine  oil  used  in  your  Audi  needs  the  right  kind  of 
oil. 
The engine  in your  Audi  is a sophisticated  powerplant  that  was  built 
to  exacting  specifications.  This  engine  needs  the  right  kind  of 
engine  oil  that  meets  specifications  regarding  quality  and  viscosity 
so that  it  can  run  smoothly  and  reliably . Choos ing  the  right  oil  and 
changing  oil  within  the  time  and  mileage  intervals  printed  in your 
vehic le's Warranty 
& Maintenance  booklet  matters  a  lot  more  today 
than  it  did  years  ago. Audi  has developed  a special  quality  standard  for  engine  oil  that  will  help  assure  that  your  vehicle's  engine  will  get 
t he  lubr ication  it  needs  for  proper  operation . 
Modern  engine  lubrication  has taken  a quantum  leap  in the  last  few 
years . Many  synthetic  oi ls availab le today  provide  better  engine 
lubrication  that  can  outlast  traditional  petroleum-based  oils, 
making  them  a smart  choice  for  use throughout  the  life  of your  Audi. 
Whether  you  use  synthetic  or  petroleum -based  engine  oi l, the  oi l 
that  you  use  must  conform  to  Audi's  oi l quality  standard  VW 502 00 
t o  help  keep  your  vehic le's  engine  running  smoo th ly and  help 
prevent  the  formation  of  harmful  deposits,  sometimes  called 
"s ludge,"  that  over  time  can  lead  to  expensive  repairs. 
At  the  time  of  printing,  engine  oi ls avai lable  in the  U.S. and  Canada 
that  meet  the  exacting  specifications  of Audi  oil  standard  VW 502 00 
are  synthetic  engine  oils . This  does  not  mean,  however,  that  every  synthetic  engine  oil  will  meet  Audi  oil  standard  VW 502 00
. So 
a lways  be sure  tha t you  use  an  approved  o il. 
To help  prevent  the  formation  of  harmful  deposits  use  only  oil  with 
the  fo llowing  specifications  printed  on  the  oil  container: 
Audi  oil  standard  VW  50 2  00 
Oil  container  labels  may  carry  the  specification  singly  or  in  combi 
nation  with  other  designa tions  and  oil  quality  standards . 
Viscosity 
Engine  oils  are  graded  according  to  their  viscosity.  The  proper 
viscosity  grade  oi l for  your  engine  depends  on  c limactic  or  seasona l 
conditions  where  you  drive.  You can  use oil  with  a viscosity  grade  of 
SAE 5W40 across  all  temperature  ranges  for  normal  driving  condi 
tions . 
However,  if  engine  oil  viscosity  grade  SAE 5W40 is not  available,  you 
can  a lso  use viscos ity  grade  SAE 5W-30  or  SAE 0W -40 as  long  as it 
meets  Audi  oil  qua lity  standard  VW 502 00  specifications . 
Because  engine  o il that  meets  the  Audi  o il standard  may  not  be 
avai lable  everywhere  when  you  need  it,  we  strongly  recommend 
that  you  a lways  carry  with  you  an  extra  quart  (l iter)  of  oil  that 
express ly conforms  to  the  VW 502 00 specification,  in case you  have 
to  top  off  the  oil  while  on  the  road . 
Only  if  the  level  of  the  o il  is at  or  be low  the  minimum  mark  on  the 
oi l dipstick  - and  no  oil  that  expressly  conforms  to  Audi  oi l standard 
VW 502 00 specifica tions  is  avai lable  -may  you  top  off  wit h a high 
quality  engine  oi l, preferably  synthetic-based,  that  meets  ACEA A3, 
ACEA A5  or  ACEA 85, AP I SL or  ILSAC GF -3 spec ifications,  but  even 
then,  only  in viscosity  grades  SAE 5W-40 , SAE 5W -30, or  SAE 0W -40 . 
However,  during  the  enti re time  between  oi l cha nge interva ls, never 
top  off  with  more  than  a total  of  0.5 qt/ liter  engine  oi l that  does  not 
conform  to  Audi  oil  specification  VW 502 00. 
For  more  information  about  engine  oi l that  has  bee n approved  for 
your  vehicle,  p lease contact  either  your  authorized  Audi  dea ler  or 
Audi  C ustomer  Relations  at  1 (800) 822 -2834  or visit  our  web  site  at 
www.audiusa.com  or www.audicanada.ca . Here  you  will  a lso find  a  .._ 
Vehicle  care I t •  
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current  list  of  oils  (manufacturers,  brand  names  etc.)  that  conform 
t o Audi  oi l standard  VW  502 00 . 
Changin g the  engine  oil 
The  engine  oil  and  oil  filter  must  be  changed  according  to  the 
mi leage  (ki lometers)  and  time  intervals  specified  in your  vehicle's 
Warranty 
& Maintenance  booklet.  Do  not  exceed  these interva ls  -
harmful  deposits  from  old  engine  oil  can  reduce  engine  perfor
mance  and  can lead  to expensive  engine  repairs. 
Changing  the  oi l at the  recommended  intervals  is so very  important 
because  the  lubricating  prope rties  of  oi l decrease  gradual ly during 
normal  vehicle  use . If you  are  not  sure  when  you  have  your  oil 
changed,  ask your  author ized Audi  Serv ice Advisor. 
Under  some  circumstances  the  engine  oil  should  even  be  changed 
more  frequently.  Change  oil  more  often  if  you  dr ive  mostly  short 
distances,  operate  the vehicle  in  dusty  areas  or  mostly under  stop 
and -go  t raffic  conditions,  or  when  you  use your  vehicle  where 
temperatures  stay  be low  freezing  point  for  long  per iods. 
Detergent  additives  in  the  oil  will  make  fresh  oil  look dark  after  the 
engine  has  been  running  for  a short  time . This  is normal  and  is  not 
a reason  to  change  the oil more  often  than recommended. 
Damag e or  malfunctions  due  to  lack  o f mainten anc e 
It is essentia l that you  change  your  oi l at the  recommended  interva ls 
using  on ly engine  oil  that  complies  with  Audi  oil  standard 
VW 502 00. Your  Limited  New  Vehicle  Warranty  does  not  cover  damage  or  ma lfunctions  due  to failure  to follow  recommended 
main tenance  and  use  requirements  as set forth  in the  Aud i Owner's 
Manual  and  Warranty 
& Maintenance  booklet.  Your  dealer  wi ll  have 
t o deny  warranty  cove rage  unless  you  present  to  the  dealer  p ro o f  in 
the  form  of  Service  or  Repair  Orders  that all schedu led maintenance 
was  pe rformed  in  a timely  manner. • 
Engine  oil  consumption 
The  engine  in  your  vehicle  depends  on  an  adeq uate 
amount  of  oil  t o lubric ate and  c ool  all  of its  m oving  parts. 
In order  to  provide  effective  lubrication  and  coo ling  of  interna l 
engine  components,  al l interna l combustio n eng ines  consume  a 
certain  amount  of oil.  Oil consumption  varies  from  engine to  engine 
and  may  change  significant ly over  the  life  of  the  engine . Typ ically, 
engines  with  a specified  break-in  period  (see=> page  271)  consume 
more  oil  du ring  the  break-in  period  than  they  consume  after  oil 
consumption  has  stabi lized . 
Unde r normal  conditions,  the  rate  of  oil  consumption  depends  on 
the  quality  and  v iscosity  of the  oil,  the  RPM (revolutions  per  minute) 
at which  the  engine  is operated,  the  ambient  temperature  and  road 
cond itions.  Fur ther factors  are the  amount  of oil  di lu tion  from  wate r 
condensation  or fue l residue  and  the  oxidation  leve l of  the  oi l. As 
any  engine  is subject  to wear  as mileage  bu ilds  up, t he oil  consump 
tion  may increase over  time until replacement  of worn  components 
may  become  necessa ry . 
With  all  these  variables  coming  into  play,  no  standard  rate  o f oi l 
consumption  can  be  established or specified . There  is no  alternative 
t o  regula r and  frequent  checking  of  the  oil  level,  see 
Note . 
If  the  yel low  engine  oil  level  warning  symbo l in  the  instrument 
clus ter  lights  up,  yo u should  check  the  oil  level  as soon  as 
possible  with  the oil dipstick=>  page  305. Top  off the  oil at your 
ea rliest  convenience => page  306 . 
& WARNING 
Before you  check  anything  in the  engine  compartment , always 
read  and  heed  all WARNING S 
=> & in "Working  in the  engine 
compartment " on 
page  301.  
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0 Note 
Driving  with  an  insufficient  oil  level is likely  to  cause  severe  damage 
to  the  engine. 
[  i] Tips 
•  The oil  pressure warning  display~ is not  an indicator  of the  oil 
level.  Do not  rely on it.  Instead,  check the  oil  level  in your  engine  at 
regular  intervals,  preferably  each time  you refuel, and  always  before 
going  on a  long trip. 
•  If you  have  the  impression  your  engine  consumes  excessive 
amounts  of  oil,  we  recommend  that  you  consult  your  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 . Your  Audi  dealer  has  instructions 
about  how  to  measure  oil  consumption  accurately. • 
Checking  the  engine  oil  level 
Fig. 239  Illustration  of 
principle  1: Markers  on 
oil dipstick 
Fig . 240  Illustration  of 
principle  2: Markers  on 
oil dipstick 
Before  you  check  anything  in  the  engine compartment, 
always  read  and  heed  all  WARNINGS=> & in  "Working  in 
the  engine  compartment"  on 
page  301. 
Determining  oil  level 
-Park your  vehicle  so that  it  is  horizontally  level. 
- While  at  operating  state  temperature,  briefly  let  the 
engine  run  at  idle  and  then  shut  it  off. 
- Wait  approx.  two  minutes. 
- Pull  out  the  oil dipstick.  Wipe  off  the  oil  dipstick with  a 
clean  cloth,  and  slide  it  back  in  as  far as  it  will  go. 
Pull  it  back  out  and  read off  the  oil  level=> fig.  239  or 
=>  fig. 
240. Top  off  the  engine  oil,  if  applicable 
=> 
page  306. 
Oil  level  within  range @ 
- Do not add  oil. 
Oil  level  within  range @ 
-You can add  oil. Afterwards, the  oil  level  should be within 
range @.  _,,, 
Vehicle  care I I irechnical data  
Page 308 of 398

___ C_h_ e_ c_k _in --== g'-- a_n _d_ f_il _li _n ..:::g:::..- ___________________________________________  _ 
Oil  l ev el  within  r ange 
© 
- You  must add  oil.  Afterwards,  the  oil  level  should  be 
within  range @. 
The oil  level  needs  to  be checked  at  regular  intervals.  The best  times 
to  do  this  are whenever  you  refuel  and  prior  to  long  tr ips. 
Depending  on  the  way  the  vehicle  is driven  and  the  operating  condi
tions,  oil  consumption  can  be  up  to  1 quart  per  1 .200 miles  (1 liter 
per  2.000  km) . Consumption  may  be  higher  within  the  first  3 .000 
miles  (5.000  km) .• 
Adding  engine oil "l=:7: 
Fig . 2 41  Engine 
co mp artm ent: Oil filler 
ca p loc ation 
Before  you  check  anything  in  the  e ngine  compartment, 
alw ay s  read  and  h eed all  WARNINGS ==> & in  "Work ing  in 
the  engi ne compartment"  on  page  301. 
- Unscrew  the  cap 
Carefully  top  off  with  the  approp riate  o il in 0.5 liter  doses . 
- Check the  oil  level  again  after  two  minutes 
==> page  305. 
- Top  off  the  oil  agai n,  if  necessary .  - Sc
rew  the  cap  back  on  the  filling  hole  and  slide  the  oil 
dipstick  in  as  far  as  it  will  go . 
& WARNING 
• Whil e topping  o ff,  the  oil  mu st  not  come  in cont act  with  h ot 
eng ine  p arts  -fire  haza rd! 
•  The o il filler  cap  mu st  be  properly  se cured to  pr event  oil from 
b ei ng  spr ayed  on th e hot  engi ne and  e xhau st  sy stem  when the 
engine  i s running · fire  ha zard ! 
•  If y our  skin  has  com e  in contac t  with the  eng ine  oil,  you  mu st 
s ub sequently  clean se  it thoroughly. 
0 Not e 
• The oil  level  must  not  be above  range @- danger  of  converter  or 
engine  damage!  Contact  an authori zed  dealership  to  draw  off  oi l,  if 
necessary. 
•  Audi do es not  re comm end the  use of  oil  add it ives.  They  may 
d a mage the  engi ne and  adversely  affe ct  you r New  Vehicle  W arra nty. 
cj? For the  sake  of the  environment 
•  Under  no  circumstances  can  the  oil  come  in  co ntact  with  the 
sewage  network  or  the  soil. 
•  Observe  and  follow  legal  regulations  when  disposing  of  empty 
oi l containers. • 
Changing  the  engine oil 
We recommend  that  have  your  oil  changed  by  an  autho
rized  Audi  dealer  or  a  qualified  service  station. 
Before  you  check  anything  in the  engine  compartment, a lways  r ead 
a nd  h eed all  W ARNIN GS=:> 
& in  "Working  in  the  engine  compart-
ment"  on 
page  301 .  .,_  
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• 
T he engine  oil  must be changed  according  to  the  intervals  specified 
in  your  Warranty 
& Maintenance  book le t. This  is very  important 
because  the lubricating  properties  of  oi l diminish  gradually  during 
normal  vehicle  use . 
Under  some  circumstances  the  engine  oil  should  be changed  more 
frequently.  Change  oil  more  often  if  you  drive  most ly short 
distances,  opera te the  vehic le  in dusty  areas  or  under  predomi 
nant ly stop-and-go  traffic  conditions,  or  have  your  vehicle where 
t emperatures  remain  below  free zing  for  extended  periods. 
Detergent  additives  in  the oil wil l make  fresh  oi l look  dark  after  the 
engine  has  been  running  for  a sh ort  time . This  is normal  and  is  not 
a reason  to  chan ge the  oi l more  often  than  recommended. 
Because  of  the  problem  of  proper  disposal,  along  with  the  specia l 
t ools  and  necessary  expertise  requ ired,  we  strongly  recommend 
that  you  have your  oi l changed  by  an  authorized 
Audi  de aler or  a 
qualified  se rvice  statio n. 
If you choo se to  change your  oil yourself , please  note  the  following 
important  information: 
& WARNING 
To reduce the  risk of per sonal injury  if you mu st  ch ange the  engine 
o il  in you r veh icle your self : 
•  Wear  eye protection. 
•  To reduce  the  ri sk  of  burns  from  hot  engine  oil , let  the  eng ine 
c ool down  to  the  touch. 
•  Wh en  remo ving the  oil dra in plug with  your fingers , stay a s far 
aw ay as po ssible. Alway s keep your forearm  parallel to  the  ground 
to  help  prevent  hot  oil from  ru nning  do wn your  arm . 
•  Drain t he o il into  a  container  designed  for  thi s purpo se ,  one 
large enough to  hold at  lea st the  total  amount  of oil in your eng ine. 
•  Engine oil i s poi sonous . K eep it  well out  of the  rea ch of  children . 
& WAR N IN G  ( continued ) 
• Continuous  contact  with  used engine  oil  i s harmful  to  your 
sk in. Al way s prote ct  your  skin  b y was hing  oil  off thorough ly  w ith 
soap  and  water . 
0 Note 
Never  mix  oil  additives  with  your  engine  oil.  These  additives  can 
damage  your  engine  and  adversely  affect  your  Aud i Limited  New 
Vehicle  Warranty. 
•  Before  changing  your  oil,  first make  sure  you  know  where  you 
can  properly  dispose  of  the  used  oil. 
•  Always  dispose  of  used  engine oil  properly.  Do  not  dump  it  on 
garden  soil,  wooded  areas,  into  ope n strea ms or  down  sewage 
drains . 
• Recycle  used  engine  oil  by  taking  it  to  a used  engine  oil  collec 
tion  facility  in  your  area,  or  contact  a service  station. • 
Engine  cooling  system 
Coolant 
The engine coolan t per for ms two  functions:  i t kee ps  the 
engine  from  ove rhe ating  and  it  prot ects  the  e ngine  from 
freezing  in  the  winter. 
The  cooling  system  is  sea led  and  general ly  requires  litt le  attention. 
The  coo ling  system  has  been  fi lled  at  the fac tory  with  a  per manent 
coolant  which  does  not  need  to be changed.  The coo lant  consists  of 
a  m ixture  of  water  and  the  manufacturer's  glycol -b asedco olant 
additive  G 12++ antifreeze  with  anti corrosion  additives  (50% for  USA  .-, 
Vehicle  care I t •  
Page 310 of 398

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models;  60% for  Canadian  models).  This  mixture  both  assures  the 
necessary  frost  protection  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  of  the  coolant  in  the  summer  by 
adding  plain  water. 
Th e  pro port io n of  coo la nt  additi ve mu st  be  at 
lea st  50 %  but  n ot  mor e th an 60 % 
to  maintai n ant ifreeze  protection 
and  cooling  efficiency.  If  the  coolant  frost  protection  is  too  low , the 
coolant  could  free ze and  damage  the veh icle  heating  and  engine 
cooling  system . 
For year-round  driving , antifreeze  is added  at the  factory  for  temper 
atures  down  to: 
•  -31 °F  ( -35 °c1  usA 
•  - 40 °F ( - 40 °C) Canada. 
You  can  mix  the 
Gl  2+ + coolant  additive  with  other  additives (G12+ 
or G12). Always  check  w ith  your  authorized  Audi  dealer. 
& WARNING 
B efo re  you che ck anyt hing  in th e eng ine  compartmen t,  alway s 
re ad  a nd  he ed  all  WARN ING S~ 
& in " Working  in the  engine 
c ompar tm ent " on 
page 30 1. 
0 Not e 
• Before  winter  sets  in,  have  the  coolant  checked  to  see  if  the 
coo lant  additive  in  your  vehicle  is  sufficient  to  meet  the  climate 
conditions.  This  is especia lly important  if you  live  in  a region  where 
the  winter  is extremely  cold . If necessary,  increase  the  proportion  of 
coolant  additive  to  60%. 
•  When  adding  coolan t additive  to your  coo ling  system, 
remember: 
-We  recommend  using  only  coolant  additive 
G12+ + (check  the 
label)  for  your  vehicle.  This  coolant  additive  is avai lable  at  autho
riz ed Audi  dealers.  Other  types  of  antifreeze  can  significantly  reduce  corrosion  protection.  The  resulting  corrosion  can  cause  a 
loss  of  coolant  and  serious  engine  damage. 
•  Do  not  add  any  type  of  radiator  leak  sealant  to  your  vehicle's 
engine  coolan t. Adding  radiator  repair  fluid  may adversely  affect  the 
function  and  performance  of  your  cooling  system  and  could  result 
in  damage  not  covered  by your  New  Vehicle  Limited  Warranty.  • 
Checking  the  engine  coolant  level 
The engine  coolant  level can  be checked  with  a quick 
glance. 
F ig . 2 42  E ngin e 
com partm ent : Cool ant 
ex pans io n  tank 
Before  you  check  anything  in  the  engine  compartment, 
alw ays read and  h eed all  WARNINGS ~ & in  "Working  in 
the  eng ine  compartment"  on  page  301. 
- Turn  off  the  ignition. 
- Read the  e ngine  coo lant  level  from  the  coo lant  expan -
sion  tank~  fig. 242. With  a cold  engi ne, the  coolant  level 
sho uld be  between  the  "min"  and  "max"  markings.  W hen 
the  engine  is warm,  the  level  may  be  slightly  above  the 
"max"  marking . 
The location  of  the  coolant  expansion  tank  can  be  seen  in  the 
engine  compartment  illustration~ 
page 302.  
Page 311 of 398

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• 
T o  obtain  an  accurate  reading,  the  engine must  be  switched  off . 
The  expansion  tank in your  vehic le  is  equipped  with  an  e lectric 
coolant  level  sensor. 
When  the  coolant  level is  too  low,  the  warning  light  in  the  Auto 
Check  System ~ 
page 37 will  blink  until  you  add  coo lant  and  the 
level  has  been  restored  to  normal.  Even though  there  is  an  electric 
coolant  level  sensor,  we  still  recommend  you  check  the coo lant  level 
from  time  to  time . 
Coolant  loss 
Coolant  loss  may  indicate  a  leak in  the  cooling  system.  In the  event 
of  coolant  loss,  the  cooling  system  should  be inspected  immedi
ately  by your  authorized  Audi dealer . It  is  not  enough  merely  to  add 
coo la nt. 
In  a sealed  system,  losses can  occur  only  if  the  boiling  point  of  the 
coolant  is  exceeded  as a  result  of  overheating . 
0 Note 
Do  not  add  any  type  of radiator leak  sealant  to  your  vehicle's  engine 
coolant . Adding  radiator  repair  fluid  may  adversely  affect  the  func
tion  and  performance  of  your  cooling  system  and  could  result  in 
damage  not covered  by  your  New Vehicle  Limited Warranty. • 
Adding  coolant 
Be very  careful  when  adding  engine  coolant. 
Before  you  check  anything  in  the  engine compartment, 
always  read  and  heed  all  WARNINGS~ &  in  "Working  in 
the  engine  compartment"  on 
page 301. 
- Turn  off  the  engine. 
- Let  the  engine  cool  down.  Place 
a thick  rag over  the coolant  expansion  tank 
~ page 308, fig.  242  and  carefully twist  the  cap  counter
clockwise ~& . 
Add  coolant. 
- Twist  the  cap  on again 
tightly . 
Replacement  engine  coolant  must  conform  to exact  specifications 
~ page  307, "Coolant".  Even  in an  emergency,  if  coolant  additive 
G12++ , G12 + or  G12  is  not  availab le, do  not use  a different  additive . 
Use  plain  water  instead  until  you  can  get the  correct  add itive  and 
can  restore  the  correct  ratio.  This shou ld  be  done  as soon  as 
possible. 
If  you  have lost a considerab le amount  of  coolant,  then  you should 
add  cold  antifreeze  and  cold  water  only  when  the  engine  is  cold . 
A lw ays  use 
new engine  coolant  when  refilling. 
Do  not  fill  coolant  above  the  "MAX"  mark.  Excess coolant  will  be 
forced  out through  the  pressure relief  valve  in the  cap  when  the 
eng ine becomes  hot. 
& WARNING 
• The  cooling  system  is  under  pressure  and  can get very  hot. 
Reduce the  risk of  scalding from  hot  coolant  by following  these 
steps. 
-Turn  off the  engine  and  allow  it  to cool down . 
- Protect  your  face , hands  and  arms  from  escaping  fluid and 
steam  by covering  the  cap with  a large , thick  rag. 
- Turn the  cap slowly  and very carefully  in a counter-clockwise 
direction  while applying  light , downward  pressure on the  top 
of the  cap. 
- To avoid  being  burned,  do  not  spill  antifreeze  or  coolant on 
the  exhaust  system or  hot engine  parts. Under  certain  condi-
tions , the  ethylene  glycol  in  engine  coolant  can  catch  fire . ... 
Vehicle  care 
I t •  
Page 312 of 398

--~C~h.!. e~ c~k ~in ~ g~ a~n ~d~ f~il ~li~ n~gL  ___________________________________________  _ 
& WARNING  (continued ) 
• Antifreeze  is poi sonous. Alway s  store  antifreeze  in  its  original 
container  and  well  out  of the  rea ch of  children. 
•  If you drain  the  coolant , it  must  be caught  and  safely stored  in 
a  proper  container  clea rly marked  "poi son ". 
0 Note 
•  Coo lant  po llutes  the  env ironment  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,  on ly wa ter  ca n  be added,  the correc t rati o 
between  water  and  antifreeze=> 
page 307 must  be restored  as soon 
as possible . 
~ For the  sake of the  environment 
Drained  coolant  should  not  be  reused.  Always  dispose  of  used 
co olant  whi le observ ing  all  e nvir o nmen tal  regula tions .• 
Radiator  fan 
The radi ator  fan s wit ches  on automa tically  by  i tsel f. 
The  radiator  fan  is  driven  by t he engine  v ia the  V -belt.  The v iscous 
clutch  regulates  the  speed  of the  fan  according  to  the  temperature 
of  the  coo lant . 
An  aux iliary  e lectric  radiator  fan*  switches  on  and  off  depending  on 
c oo lant  temperature  and  other  vehicle  opera tin g co ndi tions. 
After  you  switch  the  engine  off,  the  aux iliary  fan  can  continue 
running  for  up  to  10 minutes  -even  with  the  ignition  off.  It can  even 
switc h on  again  later  by  itself=>&, if 
•  the  temperature  of  the  engine  coolant  rises  due  to  the  heat 
bui ld-up fr om  the  eng ine  in  the  engine  c ompartmen t,  or  • 
the  engine  compartment  heats  up  because  the  vehicle  is parked 
in  in tense  s un ligh t. 
& WARNING 
•  To reduce  the  ri sk  of personal  injury  never  touch  the  radiator 
fan . 
•  The  auxiliary  e lectric  fan  is temperature  controlled  and  can 
switch  on suddenly  even  when  the  engine  is not  running . 
•  The  au xiliary  radiator  fan  switches  on automatic ally  when the 
engine  coolant  reaches  a ce rtain  temperature  and will  continue  to 
run  until  the  coolant  temperature  d rops .• 
Brake  fluid 
Checking  brake  fluid  level 
T he  brak e fluid  level  can  be checked  wit h  a quick  glance. 
F ig . 243  Engine 
c o mp artment : B ra ke 
fluid  re servoir 
Befo re  you  c heck  anything  in  the  e ngi ne  compartme nt, 
always  read  and  heed  all  WARNINGS=> & in  "Working  in 
t h e  e ngin e com part ment"  on 
page 30 1. ~  
Page 313 of 398

Checkin g and  fillin g Ill 
--------------~-
• 
-Read  the  brake  fluid  level  from  the  brake  fluid  reservoir 
~ fig.  243.  The  brake  fluid  level  must  be  between  the 
"MIN"  and  "MAX"  markings. 
The brake  fluid  reservoir  is located  at the  rear  partition  of the  engine 
compartment  on  the  left  side=> page  302. 
The  fluid  level  may  drop  slightly after  some  time  due  to  the  auto 
matic  adjustment  of  the  brake  pads . This  is  not  cause  for  alarm. 
If  the  brake  fluid  level falls  considerably  below  the  "MIN"  mark,  the 
brake  warning/indicator  l ight  (U.S. models: 
BRAKE , Canadian  models: 
CCD> l will  come  on=> page  22  and=> page  30.  Do not  continue  to 
operate  the  vehicle . The  complete  brake  syste m shou ld  be thor 
oughly  checked  by  an  authorized  Audi  dealer  or  other  qualified 
facility  and  the  cause  corrected.  If the  brake  fluid  level  is too  low,  the 
brake  warning/indicator  light  will  illuminate . Contact  an  authorized 
Audi  dea ler 
immedi ately. • 
Changing  brake  fluid 
Have  the  brake  fluid  changed  by  an  experienced  techni 
cian. 
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  po int  of  the  brake  fluid  will  also 
decrease  considerably  and  decrease  braking  performance. 
T herefore,  the  brake  fluid  must  be changed 
ever y two  yea rs. Always 
use  new  brake  fluid which  conforms  to  Federa l Motor  Veh ic le Stan
dard  "FMVSS  116 DO T 4". 
The  brake  fluid  reservoir  can  be difficult  to  reach,  therefore,  we  recommend  that  you  have  the  brake  fluid  changed  by your  autho
rized 
Audi  deal er. Your  dealer  has the  co rrect  tools,  the  right  brake 
fluid  and  the  know-how  to  do  this  for  you. 
& WARNING 
•  Bra ke  fluid  i s poi sonou s.  It  m ust  be  stor ed  only  in the  closed 
or iginal  container  out  of the  reach  of  children! 
•  Brake f ailur e can  result  fr om  old  or  in approp riat e bra ke fluid . 
Ob serve the se  pre cauti ons: 
- Use o nly br ake fluid that  me ets  SAE  specifi cation 
J 1703 and 
c onfo rm s t o Fed eral Mo to r V ehicle Standard  116 . Alway s check 
w ith  your  auth oriz ed A udi  de aler t o m ake  sure you  are  usin g 
the  correct  b rake flu id . The  corre ct ty p e  of  brake  flu id  i s al so 
indi cate d on the  br ake  fl uid  r eservo ir . 
- The  brake  f luid  mu st  be  new . Heav y use of the  brake s can 
ca us e a  va por  lo ck  if  the  brake  fluid  is left  in the  sy stem  too 
long. Thi s ca n  seriou sly  affect  th e effic iency of  the brake s as 
well  as your  safe ty. T his co uld  r esult  i n an  a ccide nt. 
0 No te 
Brake  fluid  wil l damage  the  paint  of  your  vehicle . 
'£> For the sake  of  the  environm ent 
Because  of  the  problem  of  proper  disposal  of  brake  fluid  as well  as 
the  special  too ls  required  and  the  necessary  expertise,  we  recom 
mend  that  you  have the  brake fluid  changed  by your  authorized  Audi 
dea ler. • 
Battery 
General  information 
Under norm al operating  conditions,  the  battery  in  your  Audi  does 
not  need  any  maintenance . With  high outside  temperatures  or  long 
daily  drives  we  recommend  that  you  have  the  electrolyte  level  ._ 
Vehicle  care I t •  
Page 314 of 398

-Checking 
and filling 
---=---------------
checked  by  a service  facility . The  electrolyte  level  should  also  be 
checked  each  time  the  battery  is charged 
~ page  314. 
Have the  battery  checked  when  you  take  your  vehicle  in for  service. 
You  are well  advised  to  replace  a battery  that  is older  than  5 years. 
With  certain  types  of  airbag  deployment,  the  battery  is discon nected  from  the  vehicle  electrical  system  for  safety  reasons~ 
& in 
"Repair,  care  and  disposal  of  the  airbags"  on 
page  229. 
Disconnecting  the  battery  terminals 
Some  vehicle  functions (power  window  regulators,  for  example)  are 
lost  if the  battery  terminals  are  disconnected . These  functions  have 
to  be  relearned  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 driven  for  long  periods 
If you  do  not  drive  your  vehicle  over  a period  of  several  days  or 
weeks,  electrical  components  are gradually  cut  back or switched  off. 
This  reduces  energy  consumption  and  maintains  starting  capability 
over  a  longer  period 
~ page  269. 
Take into  consideration  that  when  you  unlock  your  vehicle,  some 
convenience  functions , such  as the  master  key remote  function  or 
power  seat  adjustment,  may  not  be  available.  The  convenience 
functions  will  be available  again  when  you  turn  on  the  ignition  and 
start  the  engine. 
Winter  operation 
During  the  winter  months,  battery  capacity  tends  to  decrease  as 
temperatures  drop . This  is  because  more  power  is also  consumed 
while  starting,  and  the  headlights,  rear  window  defogger,  etc.,  are 
used  more  often. 
Avoid  unnecessary  power  consumption,  particularly  in city  traffic  or 
when  traveling  only  short  distances.  Let your  authorized  Audi  dealer 
check  the  capacity  of  the  vehicle  battery  before  winter  sets  in 
~ page  314. A well  charged  battery  will  not only  prevent  starting 
problems  when  the  weather  is cold , but  will  also  last  longer . 
[ i] Tips 
If  your  vehicle  is  left standing  for  several  weeks  at  extremely  low 
temperatures,  the  vehicle  battery  should  be  removed  and  stored 
where  it will  not  freeze.  This  will  prevent  it from  being  damaged  and 
having  to  be  replaced. • 
Working  on  the  battery 
Be  especially  careful  when  working  on or  near  the  battery. 
Fig. 244  Luggage 
compartment : Battery 
The  battery  is located  in the  luggage  compartment  under 
the  floor.  Before  you  check  anything  in  the  luggage 
compartment, 
read  and  heed  all  WARNINGS=>& . 
Lift the  floor  by  the  plastic  handle. 
Hook  the  handle  into  the  luggage  compartment  weather 
strip. 
Always  heed  the safety  warnings, when  working  on  the  vehicle 
battery  or  the  vehicle  electrical  system  to  prevent  injury.