tow AUDI A8 2014 Owner's Guide
Page 163 of 314
& WARNING 
Damage  to  the  front  passenger  seat  can 
prevent  the  front  airbag  from  working 
properly. 
- Improper  repair  or  disassembly  of  the 
front  passenger  and  driver  seat  will  pre
vent  the  Advanced  Airbag  System  from 
functioning  properly. 
- Repairs  to  the  front  passenger  seat  must 
be  performed  by qualified  and  properly 
trained  workshop  personnel. 
- Never  remove  the  front  passenger  or 
driver  seat  from  the  vehicle. 
- Never  remove  the  upholstery  from  the 
front  passenger  seat. 
- Never  disassemble  or  remove  parts  from 
the  seat  or disconnect  wires  from  it. 
- Never  carry  sharp  objects  in your  pockets 
or  place  them  on  the  seat.  If  the  weight
sensing  mat  in the  passenger  seat  is 
punctured  it  cannot  work  properly. 
- Never  carry  things  on  your  lap  or  carry 
objects  on  the  passenger  seat.  Such 
items  can  increase the  weight  registered 
by the  weight-sensing  mat  and  send  the 
wrong  information  to the  airbag  control 
unit. 
- Never  store  items  under  the  front  pas
senger  seat.  Parts  of  the  Advanced  Air
bag  System  under  the  passenger  seat 
could  be  damaged,  preventing  them  and 
the  airbag  system  from  working  proper
ly. 
- Never  place  seat  covers  or  replacement 
upholstery  that have  not  been  specifical
ly approved  by Audi on  the front  seats. 
- Seat  covers  can prevent  the  Advanced 
Airbag  System  from  recognizing  child  re
straints  or  occupants  on  the  front  pas
senger  seat  and  prevent  the  side  airbag 
in the  seat  backrest  from  deploying  prop
erly. 
- Never  use  cushions,  pillows,  blankets  or 
similar  items  on  the  front  passenger 
seat.  The  additional  padding  will  prevent 
the  weight-sensing  mat  in the  seat  from 
accurately  registering  the  child  restraint 
-
Airbag  system  161 
or  person  on  the  seat  and  prevent  the 
Advanced  Airbag  System  from  function
ing  properly. 
- If you  must  use  a  child  restraint  on  the 
front  passenger  seat  and  the  child  re
straint  manufacturer's  instructions  re
quire  the  use  of  a  towel,  foam  cushion  or 
something  else  to  properly  position  the 
child  restraint,  make  certain  that  the 
PASSENGER  AIR  BAG OFF light  comes 
on  and  stays on  whenever  the  child  re
straint  is installed  on  the  front  passen
ger  seat. 
- If the PASSENGER  AIR  BAG OFF light 
does  not  come  on  and  stay  on,  immedi
ately  install  child restraint  in a  rear  seat
ing  position  and  have  the  airbag  system 
inspected  by your  Audi  dealer. 
How the  Advanced Airbag  System 
components  work  together 
The front  Advanced  Airbag  System  and  the 
side  airbags  supplement  the  protection  of
fered  by  the front  three-point  safety  belts 
with  pretensioners  and  load limiters  and the 
adjustable  head  restraints  to  help  reduce  the 
risk of  injury  in  a wide  range  of  accident  and 
crash  situations.  Be sure  to  read  the  impor
tant  information  about  safety  and  heed  the 
WARNINGS  in this  chapter. 
Deployment  of the  Adv a need  Airbag  System 
and  the  activation  of  the  safety  belt  preten
sioners  depend  on  the  deceleration  measured  by the  crash  sensors  and  registered  by the 
electronic  control  unit.  The  amount  of  infla
tion  of the  front  airbags  can  also  be  adapted 
to  the  front  seat  position,  depending  on  the 
distance  between  the  respective front  seat 
and  the  steering  wheel  or  instrument  panel  as  registered  by sensors  in the  seats.  Crash  se
verity  depends  on  speed  and  deceleration  as 
well  as  the  mass  and  stiffness  of the  vehicle 
or  object  involved  in the  crash. 
On the  passenger  side,  regardless  of  safety 
belt  use,  the  airbag  will  be  turned  off  if the 
weight  on  the  passenger  seat  is less  than  the 
Iii>' 
• 
•  
Page 191 of 314
though  an  adult  were  on the  seat  and  deploy the  Advanced Airbag when  it must 
be suppressed  causing  serious  or even 
fatal  injury  to  the  child . 
- Make sure  that  the 
PASSENGER AIR BAG 
OFF 
light  comes  on  and  stays  on  all the 
time  whenever  the  ignition  is switched 
on. 
- If the 
PASSENGER AIR BAG OFF light 
does  not  come  on  and  stay  on,  immedi
ately  install  the  rear-facing  child  safety 
seat  in a rear  seating  position  and  have 
the  airbag  system  inspected  by your Audi  dealer. 
Activating  the  convertible  locking  retractor 
Use the  convertible  locking retractor  to se
cure a child restraint. 
Always heed  the  child safety  seat  manufactur
er's  instructions  when  installing  a child  re
straint  in your vehicle.  To activate  the  conver
tible locking retractor: 
.,. Place  the  child  restraint  on  a seat,  prefera
bly on  the  rear  seat. 
.,.  Slowly  pull  the  belt  all the  way out. 
.,.  Route  it around  or  through  the  child  re
straint  belt  path¢&_ . 
.,.  Push  the  child safety  seat  down  with your 
full  weight  to  get  the  safety  belt  really tight. 
.,.  Insert  the  belt  tongue  into  the  buckle  for 
that  seating  position. 
.,.  Guide the  safety  belt  back into  the  retractor 
until  the  belt  lies flat  and  snug  on the  child 
safety  seat. 
.,.  You should  hear  a "clicking"  noise  as  the 
belt  winds  back into  the  inertia  reel. Test  the 
convertible  locking  retractor  by pulling  on 
the  belt.  You should  no  longer be able  to 
pull  the  belt  out  of the  retractor.  The con
vertible  locking  retractor  is now  activated. 
.,.  Make sure  that  the  red  release  button  is fac 
ing  away from  the child  restraint  so that  it 
can  be  unbuckled  quickly  . 
.,.  Pull  on the  belt  to  make  sure  the  safety  belt 
is properly  tight  and fastened  so that  the 
Child  Safety  189 
seat  cannot  move forward  or  sideways  more 
than  one inch (2.5  cm). 
A WARNING 
Using the  wrong  child  restraint  or  an  im
properly  installed  child  restraint  can cause 
serious  personal  injury or  death  in a crash. 
-Always  make  sure  that  the  safety  belt  re- tractor  is locked when  installing a child 
safety  seat.  An unlocked  safety  belt  re
tractor  cannot  hold  the  child  safety  seat  in place  during  normal driving  or  in a 
crash. 
- Always buckle  the  child  safety  seat  firmly 
in place  even  if a child  is not  sitting  in it. 
A loose  child safety  seat  can fly around 
during  a sudden  stop or  in  a crash. 
- Always make  sure  the  seat  backrest  to 
which  the  child  restraint  is installed  is in 
an  upright  position  and  securely  latched 
into  place  and  cannot  fold forward.  Oth
erwise,  the  seatback  with  the  child  safety 
seat  attached  to  it could fly  forward in 
the event of an accident or other emer
gency  situation  . 
- Always read  and  heed  all WARNINGS  whenever  using  a child  restrained  in ave
hicle is being  used 
q page  177. Special 
precautions  apply when  installing a child 
safety  seat  on  the front  passenger  seat 
q page  155,  Child restraints  on the  front 
seat- some  important  things  to know . 
Deactivating  the  convertible  locking 
retractor 
-
The  convertible  locking retractor  for child re
straints  will be deactivated  automatically  when  the belt  is wound  all the  way back into 
the  retractor. 
.,.  Press  the  red  button  on  the  safety belt buck
le.  The  belt  tongue  will pop  out  of the  buck
le . 
.,.  Guide the  safety  belt  all  the  way back  into 
its  stowed  position. 
Always  let the  safety  belt  retract completely 
into  its  stowed  position.  The safety  belt  can  ..,. 
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Page 192 of 314
190  Child  Saf ety 
now  be  used  as  an  ordinary  safety  belt  with 
out  the  convertible  locking  retractor  for  chi ld 
restra ints . 
I f the  convert ible  locking  re tracto r shou ld  be 
activated  inadvertently,  the  safety  belt  m ust 
be  unfastened  and  guided  completely  back  in
to  its  stowed  pos ition  to  deactivate  th is fea 
ture.  If  the  convertib le  locking  retractor  is  not 
deactivated,  the  safety  belt  will  gradually  be
come  tighter  and  uncomfortable  to  wear . 
A WARNING 
Improperly installed  child  safety  seats  in
crease  the  risk of  ser ious  personal  injury 
and  death  in  a collision. 
- Never  unfasten  the  safety  belt  to  deacti
vate  the  convert ible  lock ing  ret ractor  for 
c hild  restraints  while  the  veh icle  is  mov
ing.  You would  not  be  restrained  and 
cou ld  be  ser iously  injured  in an  accident. 
- Always  read  and  heed  all  WARNI NGS 
whenever  using  a  child  rest rained  in  ave
hicle  is being  used 
¢ page  177. Special 
precautions  apply  when  installing  a ch ild 
safety  seat  on  the  front  passenger  seat 
¢ page  155,  Child  restraints  on the  front 
seat  -some  important  things  to  know. 
LATCH  Lower 
anchorages  and  tethers 
for  children 
Child Restraint  System  anchors  and  how 
are they  related  to  child  safety 
To provide  a  simp ler  and  more  practicable  way 
to  attach  the  ch ild  restraint  on  the  veh icle 
seat,  Federa l regu lations  require  specia l lower 
anchorages  in vehicles  and  devices  on  new 
child  restraints  to  attach  to  the  vehicle  ancho rages. 
The  combination  of  the  tether  anchorages  and  the  lower  anchorages  is now  generally  called 
the 
LA TCH system  for  " Lower  Anchorages  and 
T ethers  for  C hildren." 
F orward- facing  child  rest raints  manufactured 
after  September  1,  1999,  are  required  by U.S.  federa
l regu lations  to  comply  with  new  child 
head  movement  performance  req uirements. 
These  new  performance  req uirements  make  a 
tether  necessary  on  most  new  child  seats. 
Installing  a child  restra int  that  requires  a  top 
tethe r without  one  can  seriously  impair  the 
performance  of  the  chi ld  restra int  and  its  abil
ity to  protect  the  child  in a  coll is ion.  Insta lling 
a chi ld  restraint  that  requires  a  top  tether 
without  the  top  tether  may  be  a violat ion  of 
state  law. 
Child restraint  manufacturers  offer  LATCH 
lower  anchorages  on  their  child  seats  w ith 
hook -on  or  push-on  connectors  attached  to 
adjustable  straps . 
In  add ition  to  the  LATCH lower  anchorages, 
these  child  restraint  systems  usually  require 
the  use  of tether  straps  to  he lp  keep  the  chi ld 
r est raint  firmly  in  place. 
A WARNING ,__ 
Imp roper  installat ion  of  child  restra ints 
will  increase  the  r is k  of  injury  and  death  in 
a  crash. 
- Always follow  the  instr uctions  provided 
by  the  manufacture r of  the  child  re
s t raint  you  intend  to  install  in your  ve hi
cle. 
- Never  install  a  chi ld  restraint  withou t  a 
p roperly  attached  top  tether  strap  if the 
child  restraint  manufacture r's  instruc 
tions  require  the  top  tether  st rap  to  be 
used. 
- Improper  use  of  child  rest raint  LATCH 
lowe r anchorage  points  can  lead  to  injury 
in a  co llision.  The  LATCH lowe r anchorage 
points  are  designed  to  withstand  on ly 
those  loads  imposed  by correctly  fitted 
child  res traints. 
- Never  mount  two  child  restra int  systems 
on  one  LATC H lower  anchorage  point. 
- Never  secure  or  attach  any  luggage  or 
other  item  to  the  LATCH lower  anchorag-
-
es . ~  
Page 201 of 314
Intelligent  technology Notice  about  data 
recorded  by  vehicle 
control  modules 
Your vehicle  is not  equipped  with  an  Event Da
ta  Recorder  (EDR), installed  by some  manu
facturers  for the  express  purpose of  capturing 
data  for  retrieval  after  an accident  or  crash 
event.  EDR's are sometimes  called  "crash  re
corders". 
Some  state laws restrict  the  retr ieval or  down
loading  of  data  stored  by  EDR's that  were  in
stalled  in a vehicle  for  the  express purpose  of 
retrieving  data  after  an accident  or  crash 
event  without  the  owner's  consent. 
Although  your  vehicle  is not  equipped  with  an 
EDR,  it is equipped  with  a number  of  electron
ic  control  modules  for  various  vehicle  systems 
such as, for  examp le, engine  function,  emis
sion  control,  as well  as for  the  airbags  and 
safety  belts. 
These electronic  control  modules also record 
vehicle-related  data  during  norma l vehicle  op
eration  for  diagnostic  and repair  purposes. 
The  recording  capacity  of  the  electronic  con
trol  modules  is limited  to data  (no sound  is re
corded)  and only  a small  amount  of  data  is ac
tually  recorded  over a very limited  period  of 
time  and stored  when  a system  fault  or other 
condition  is sensed by  a control  unit. Some of 
the  data  then  stored  may relate  to vehicle 
speed,  direction,  braking  as we ll as  restraint 
system  use and performance  in the  event  of  a 
crash or  other  condition.  Stored  data  can only  be read and downloaded  with  special  equip
ment. 
Electronic  Stabilization 
Control  (ESC) 
Description 
ESC helps  to  improve road  holding  and vehicle 
dynamics  to  help  reduce the  probability  of 
skidding  and  loss of  veh icle control.  It  works 
only  when  the  engine  is running.  ESC detects 
Intelligent  technology  199 
certain  difficult  driving situations,  including 
when  the  vehicle  is beginning  to  spin  (yaw) 
out  of  control  and  helps you to  get  the  veh icle 
back under  control  by se lectively  braking  the 
wheels,  and/or  reducing engine  power  and 
providing  steering  ass istance to  help  hold  the 
vehicle  on  the driver's  intended  course.  The in
dicator  light 
JjJ in the  instrument  cluster 
blinks  when  ESC is taking  action  to  help  you 
control  the  vehicle. 
ESC has  limitations . 
It is important  to  remem
ber that  ESC cannot  overcome  the  laws of 
physics. 
It will  not  always be able to  help  out 
under  all  conditions  you may  come  up  against. 
For  example,  ESC may not  always be  able to 
help you  master  situations  where  there  is a 
sudden  change in  the  coefficient  of  friction  of 
the  road surface.  When  there  is a section  of  dry  road that  is suddenly  covered with  water, 
slush  or  snow,  ESC cannot  perform  the same 
way  it would  on the  dry  surface.  If  the  vehicle 
hydroplanes  (rides  on a cushion  of  water  in
stead  of  the  road surface),  ESC will  not  be 
able  to help  you  steer  the  vehicle because  con
tact  with  the  pavement  has been  interrupted 
and the  vehicle  cannot  be braked or  steered . 
During  fast  cornering,  particularly  on winding 
roads,  ESC cannot  always deal  as effectively 
with  difficult  driving  situations  than  at  lower 
speeds. When  towing  a trailer,  ESC is not  able 
to  help  you  regain  control  as it  would  if you 
were  not tow ing a trailer. 
A lways adjust  your  speed and driving  style  to 
road,  traffic  and weather  conditions.  ESC can
not  override  the  vehicle's  physical  limits,  in
crease the  available  traction,  or keep a vehicle 
on  the  road  if  road departure  is a  result  of 
driver  inattention.  Instead,  ESC improves  the 
poss ibility  of  keeping  the  vehicle  under  con
trol  and on  the road  dur ing extreme  maneu
vers by  using the driver's  steering  inputs  to 
help  keep  the  vehicle  going  in the  intended  di
rection.  If  you  are traveling  at  a speed that 
causes you to  run  off  the  road  before  ESC can 
provide  any assistance, you  may not  experi
ence the  benefits  of  ESC. 
• 
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Page 202 of 314
200  Intellig ent  technol ogy 
ESC includes  and/or  works  together  with  the 
anti-lock  braking  system  (ABS), brake assist 
system,  anti-slip  regulat ion  (ASR),  electronic 
d ifferential  lock  (EDL), dynamic  steering*  and 
electronic  interaxle  differential  lock*.  ESC  is 
switched  on  all  the  time.  In  certain  situations 
when  you  need less tract ion, you ca n sw itch 
off  ASR by pressing  the  button  above 
~ page 201, fig. 188 the  se lector  lever.  Be 
sure  to sw itch  ASR on  aga in when  you  no lon
ger  need less traction. 
Anti -lock braking  system  (ABS ) 
ABS prevents  the  wheels  from  locking  up 
when  braking.  The vehicle  can still  be steered 
even du ring  ha rd  b raking . Apply  steady  pres
sure to  the  brake  pedal.  Do not  pump  the  ped
a l.  A pulsing  in the  brake  peda l indicates  that 
the  system  is he lping  you to  brake the  vehicle. 
Br ake  assist system 
The brake assist  system  can decrease brak ing 
d istance.  It  increases braking  power  when  the 
d river  p resses the  brake  pedal  q uick ly in  emer
gency situations.  You must  press and  hold  the  brake peda l until  the  situation  is over. In 
vehicles with  adaptive  cruise  control*,  the  brake assist  system  is more  sensitive  if  the 
d istance  detected  to  the  vehicle  ahead  is too 
small. 
Anti- slip  regulati on  (ASR ) 
ASR reduces engine  power  when  the  drive 
wheels  begin  to  spin  and adapts  the  force  to 
the  road  condit ions. This makes it  easier  to 
start,  accelerate  and drive  up  hills. 
El ectronic  diff erential  lo ck  (EDL ) 
The ED L brakes wheels  that  are spinning  and 
transfers  the  drive  power  to  the  other  drive 
wheel  or whee ls if  the  vehicle  is equipped  with 
all  whee l drive*.  This funct ion  is available  up 
to  about  7S mph  (120  km/h). 
In  extreme  cases, EDL a utomatica lly switches 
off  to  help  keep the  brake on  the  braked whee l 
from  overheating.  EDL will  switch  on again  au
tomatically  when  conditions  have returned  to  normal. 
Dynamic  ste ering * 
On vehicles  with  dynamic  s teering,  ES C helps 
stabilize  the  steering  in certain  situations. 
Electronic  interaxle  differential  lock 
function* 
T he electronic  interaxle  differentia l lock f unc
tion  activates  when  driving  thro ugh  curves. 
Braking  is targeted  toward  the  wheels  on the 
inside  of  the  curve as needed . This  he lps to 
minimize  front  whee l skid,  improves  traction 
and allows  for  more  precise driving  through 
curves . 
A WARNING 
- ESC, ABS, ASR, EDL, dynamic  steering* 
and the  electronic  interaxle  differential loc k function*  cannot  overcome  the  laws 
of  physics. This is espec ially  impo rtant 
on  slippery  o r we t roads. 
If the  systems 
begin  acting  to  stabilize  your  vehicle,  you 
should  immediately  change yo ur speed 
to  match  the  road  and traffic  conditions . 
Do not  let  the  increased safety  provided 
by these  systems  tempt  you to  take  risks.  Doing  so will  increase the  risk  of  a loss of 
veh icle control,  collision  and ser ious per
sonal  injur ies. 
-Always  adapt  your  speed to  road,  traffic  and weather  conditions.  The risk  of  losing control  of  the  vehicle  increases when 
d riving  too  fast,  espec ially  through 
curves and on  slippery  or wet  roads,  and 
when  driving  too  close to  vehicles  up 
ahead.  ESC, ABS, the  brake ass ist  sys 
tem,  EDL, ASR, dynamic  steering * and 
the  electron ic interaxle  differential  lock 
function*  cannot  prevent  collisions. 
- Always accelerate  with  special  care on 
even, smooth  s urfaces  such as those  that 
are wet  or  covered with  ice and snow. 
The drive  wheels  can spin  even w ith 
these  assistance systems  that  cannot  al
ways he lp to  red uce the  risk of  loss of  ve
h icle  control. 
- 
Page 205 of 314
Clean  off  accumulated  salt  coating  from 
brake  discs  and  pads  with  a few  careful 
brake  applicat ions . 
-If you  damage  the  front  spoiler,  or  if you 
install  a  different  spoiler,  be  sure  the  air 
flow  to  the  front  brakes  is  not  obstruct ed . Otherwise  the  brake  system  could 
overheat  reducing  the  effectiveness  of 
the  ent ire  brake  system. 
- Failure  of one  brake  c ircuit  will  impair 
the  braking  capability  resulting  in an  in
cr eased  stopp ing  distance.  Avoid driv ing 
the  vehicle  and  have  it towed  to  the  near est  Aud i dea ler  or  q ualified  wor kshop . 
- Never  let  the  vehicle  rol l to  a  stop  w ith 
t he  engine  shu t off. 
- If  the  brake  booster  is not  work ing,  the 
brake  pedal  must  be  pressed  conside ra
bly  harder  to  make  up  for  the  lac k of 
booster  assistance. 
Brake booster 
The brake  booster  adds  extra  braking  power. 
The  brake  booster  works  w ith  vacuum  pres 
sure  which  is  created  only when  the  engine  is 
ru nning 
9 ,&. . 
,&. WARNING 
-Never  le t the  vehicle  ro ll to  a  stop  w ith 
t he  engine  shu t off. 
- If the  brake  booster  is not  work ing,  fo r 
ex ample  when  towing  your  ve hicl e,  or 
because  the  b rake  booste r has  somehow 
been  damaged,  the  brake  pedal  must  be 
pressed  considerab ly harder  to  make  up 
for  the  lack  of  booster  assistance. 
Servotronic  - advanced 
power  steering  system 
-
The power  steering  systems  use  the  power  of 
the  running  engine  to  allow precise  steering 
with  little  effort. 
The  advanced Servotronic power  steering  sys
tem  senses  the  road  speed  and  electron ically 
ad ju sts  powe r ass istance  to  provide  comfor ta-
Int ellig ent  technolog y 203 
ble  and  safe  steering  response  exactly  match 
ed  to  th e vehicle  speed . 
Power  steer ing  will  not  work  if the  engine  is 
off . As a  result,  the  steering  wheel  will  be  h ard 
to  tu rn. 
T he  powe r stee ring  fluid  level  is checked  d ur
i ng  t he sched uled  maintena nce  services. 
(D Note 
If there  is an  e lectronic  malfunction, ser
votronic 
will s till fu nction  like  a conven
tiona l powe r steering  system,  providing  a 
constant  steering  s upport  force  tha t  is  no 
l onge r proportionate  to  the  vehicle  speed. 
This  is most  noticeab le  when  t urni ng  the 
steering  wheel  at  low speeds  (for  example 
when  parking),  -more  effort  w ill be  re
quired  than  usual. 
- Be aware  of  the  different  than  usual  steering  response  and  adjust  your  steer
ing  force  accordingly. 
- Have the  problem  checked  and  set  right  by an  Audi  dealer  as  soon  as  possible. 
(D Tips 
-When  the  engine  is running,  never  hold 
the  steering  wheel  turned  all the  way to 
the  right  or to  the  left  for  longer  than  15 
seconds . The  power  steering  pump  will 
overheat  the  hydraulic  fluid  if yo u keep 
holding  the  stee ring  wheel  turned  all the 
way. This  is  likely to  damage  the  power 
steering  sys tem. 
- If  the  powe r stee ring  system  should  fa il 
entire ly, o r if t he  engine  is  not  runn ing 
(for  example,  wh ile  be ing  towed),  you 
w ill  still  be  able  to  steer  the  veh icle . 
However, 
considerably more  effort  will 
be  required  to  do  so . 
- If  the  powe r steering  system  sho uld 
have  a  leak,  or  is  not  functioning  proper
ly, contact  your  author ized  Audi dealer 
immediately. 
- The  power  steering  system  req uires  a 
specially  formu lated  hydraulic  fluid.  The 
power  steering  fluid  reservoir  is  located 
in the  engine  compartment 
9 page  233. IJJ,, 
• 
•  
Page 210 of 314
208  Driving  and  en vir onm ent 
Catalytic  converter 
Appl ies to  vehicles: with  gasoline e ngin e 
It  is very important  that  your  emission  con
trol  system  (catalytic  converter)  is function
ing properly  to ensure  that your  vehicle is run
ning  in  an  environmentally  sound  manner . 
.. Always  use  lead-free  gasoline i=> page  222, 
Fuel  supply . 
.. Never  run  the  tank  down  all  the  way to  emp-
ty . 
.. Never  put  too  much  motor  oil  in your  engine 
¢ page  23 7, Adding  engine  oil <t=r.. 
..  Never  try  to  push- or tow-start  your  veh icle. 
The  catalytic  converter  is an  eff ic ient  "clean
up"  device  built  into  the  exhaust  system  of 
the  vehicle.  The  catalyti c converter  burns 
many  of the  pollutants  in the  exhaust  gas  be
fore  they  are  released  into  the  atmosphere. 
The  exclus ive use  of  unleaded  fuel  is cr itically 
important  for  the  l ife  of  the  cata lytic  convert
e r and  proper  functioning  of the  engine. 
A WARNING 
T he  temperature  of the  exhaust  system  is 
high,  both  when  driving  and  after  stopping 
the  engine . 
- Never  touch  the  exhaust  tail  pipes  once 
they  have  become  hot.  This could  result 
in  burns. 
- Do not  park  or operate  the  vehicle  in 
areas  where  the  hot  exhaust  system  may 
come  in contact  with  dry  grass,  brush, 
fuel  spill  or  other  material  which  can 
cause  a fire. 
- Do not  apply  additional  undercoating  or 
rustproofing  on  or  near  the  exhaust 
man ifold,  exhaust  p ipes,  catalytic  con
verter  or  heat  shields . During  driving,  the 
substance  used  for  undercoating  cou ld 
overheat  and  cause  a  fire. 
@) Note 
- Be aware  that  just  one  tank  f illing  with 
leaded fuel  will already  seriously  de
grade  the  performance  of  the  cata lytic 
conve rter.  -
Do not  exceed  the  correct  engine  oil  level 
i=>page  237. 
-Do not  drive  until  the  fue l tank  becomes 
completely  empty . The  engine  co uld  mis
fire . Unburned  fuel  could  also  get  into 
the  exhaust  system  and  this  cou ld  cause 
the  catalytic  converter  to  overheat. 
- Do not  switch  off  the  ignition  while  the 
vehicle  is  mov ing. 
- Do not  continue  to  operate  your  vehicle 
under  these  conditions,  as  otherwise  fuel 
can  reach  the  catalyt ic converter.  Th is 
cou ld  result  in overheating  of the  con
verter,  requir ing  its  replacement . 
- To assure  efficient  operation  of  the  Emis
sion  Control  System: 
- Have  you r vehicle  maintained  p roperly 
and  in accordance  w ith  the  service  rec
ommendations  in your  Warranty  &  Maintenance  book let. 
- Lack  of  prope r maintenance  as  we ll as 
improper  use  of the  vehicle  wi ll impair 
the  function  of the  em ission  contro l 
system  and  could  lead  to  damage. 
@) For the  sa ke of the  en vironment 
Even when  the  Emission  Control  System  is 
ope rat ing  properly,  the  exhaust  gas  can 
have  a  sulfur-like  exhaust  gas  smell  under 
some  operat ing  states.  This  depends  on 
the  sulfur  content  of  the  fuel  being  used . 
Using  a  different  brand  of fuel  may  help, 
or f illing  the  tank  with  lead-free  super 
grade  gasoline. 
Diesel  particulate  filter 
Applies  to  vehicles: with  diese l eng ine 
The  diesel  part icu late  filter  filters  nearly  all  of 
the  soot  pa rticles  out  of the  exhaust . T he  fil
ter  cleans  itself  automat ica lly unde r no rma l 
dr iv ing  cond itions . If the  filte r cannot  clean  it
self  (for  example,  because  you  are  on ly driving 
short  distances),  the  filter  becomes  clogged 
with  soot  and  the 
II symbol  for  the  diesel 
particulate  filter  i lluminates 
i=> page  21.  ..,.  
Page 214 of 314
212  Trailertowing 
Trailer  towing Driving  with  a  trailer 
General  information 
Your Audi was  designed  primarily  for passen
ger  transportation . 
If you  plan  to  tow  a trai ler,  please  remember 
that  the  additional  load  will affect  durability, 
economy  and  performance . 
Trailer towing  not  only places  more  stress  on  the  vehicle,  it also  calls  for  more  concentra
tion  from  the  driver. 
For  this  reason,  always  follow  the  operating 
and  driving  instructions  provided  and  use 
common  sense. 
(D Note 
If you  are  going  to  tow  a trai ler, you  must 
activate  the  trailer  operation  mode 
i::> page  212,  Operating  instructions . 
Technical requirements 
Trailer  hitch 
Use a weight-carrying  hitch  conforming  to  the 
gross  trailer  weight.  The hitch  must  be suita ble for  your vehicle  and  trailer  and  must  be 
mounted  securely  on the  veh icle 's  chassis  at  a 
technically  sound location . Use only a trailer 
hitch  with  a  removable  ball  mount.  A lways 
check with  the  trai le r  hitch  manufacturer  to 
make  sure  that you  are  using the  cor rect 
hitch. 
Do  not use a bumper  hitch. 
The hitch  must  be  installed  in such  a way that 
it does  not  interfere  with  the  impact-absorb
ing  bumper  system.  No modifications  should 
be  made  to  the  vehicle  exhaust  and  brake sys
tems.  From time  to  time,  check that  all  hitch 
mounting  bo lts  remain  securely  fastened. 
When  you  are  not  towing  a  trailer, remove  the 
trailer  hitch ball  mount.  This  prevents  the 
h itch  from  causing  damage  should  your veh i
cle  be struck  from  behind~ &. 
Trailer  brakes 
If your  trailer is equipped  with  a brak ing sys
tem,  check  to be  sure  that  it conforms  to  all 
regulations. 
T he  trailer  hydraulic  brake  system must not be 
direc tly connected  to  the vehicle's  hydraulic 
brake  system . 
Safety  chains 
Always use  safety  chains  between  your veh icle 
and  the  tra iler. 
Trailer  lights 
Trailer lights  must  meet  all  regulations.  Be 
sure  to  check with  your  Audi dealer  for  correct 
wiring,  switches  and  relays. 
Mirrors 
If you are  unable to  see  the  traffic  behind  you 
using  the  regular  outside  mirrors,  then  you 
must install  extended  mirrors. It is important 
that  you 
always have clear  v is ion  to  the  rear . 
A WARNING ,~ -
After  removing  the  trailer hitch,  do  not 
store  it in your  vehicl e. In  case  of  sudden 
braking,  the  hitch  could  fly forward and in
jure  you  or your  passengers. 
Operating  instructions 
Fig.  189 MMI  display : tow ing  mode  on 
Maximum  traile r weight 
A trai ler  for  your vehicle  is limited  to  a typical 
class  1 or  class  2 trailer.  .,.  
Page 215 of 314
Trailer  load  distribution Be  sure  the  load  in the  trailer is held  securely 
in  place  to  prevent  it from  shifting  forward, 
backward  or  sideways. 
Never allow  a passenger  to  ride in a trailer 
¢ .&. in Driving instructions  on page  214. 
Engine cooling  system 
Towing  a trailer  makes  the  engine  work  hard 
er . It  is  important  that  the  cooling  system's 
performance  is  up to  the  additional  load . 
Make  sure  that  the  cooling  system  has  enough 
fluid. 
Tire pressure 
When  towing  a  trailer,  inflate  the tires  of  your 
vehicle  to  the  cold  tire  pressure  listed  under 
"Full  load"  on the  label  located  on  the  driver's 
side  B-pillar  (visible  when  the  door  is open). 
Inflate  trailer  tires  to  trailer  and  tire  manufac
turers'  specifications. 
Lights 
Check  to  make  sure  both  vehicle  and  trailer 
lights  are  working  properly. 
Safety  chains  Be sure  trailer  safety  chains  are  properly  con
nected  from  the  trailer to  the  hitch  on  the ve
hicle . Leave  enough  slack  in the  chains  to  per
mit  turning  corners . When  you  install  safety 
chains,  make  sure  they  will  not  drag  on  the 
road  when  you  are  driving. 
The  chains  should  cross  under  the  trailer 
tongue  to  prevent  it from  dropping  in case  of 
separation  from  the  hitch . 
Adjusting  the  Audi  drive  select  Make  sure  the  vehicle  is on  a  level  surface 
be
fore 
hitching  up  the  trailer  and before adjust 
ing  the  tongue  weight.  The  vehicle  must  be  in 
auto or comfort driving  mode  and  not  raised 
¢page  110, ~CD . 
Make  sure  that  the vehicle  is lowered.  In  Info 
tainment,  select: 
ICARI function  button> low
er  control  button . 
Trailer  towing  213 
If you  must  drive  under poor  road  conditions, 
you  can  raise  the  vehicle 
after coupling  the 
trailer  or 
after adjusting  the  tongue  weight 
¢ page  112. 
@ Note 
- Changes  in temperature  or  load can  af
fect  the  height  of the  vehicle. 
- Always  select  auto  or  comfort mode. 
Otherwise,  the  tongue  load specified  for 
your  vehicle  will  no  longer  be  applicable. 
Driving  instructions 
Driving with  a  trailer always  requires extra 
core and  consideration. 
To  obtain  the  best  possible  handling  of  vehicle 
and  trailer,  please  note  the  following: 
.,.  Do  not  tow  a  loaded  trailer when  your  car  it
self  is  not  loaded  . 
.,.  Be especially  careful  when  passing  other 
vehicles. 
.,.  Observe  speed  limits. 
.,.  Do not  drive  at  the  maximum  permissible 
speed  . 
.,.  Always  apply  brakes  early . 
.,.  Monitor  the  temperature  gauge. 
Weight  distribution 
Towing  a  loaded  trailer  with  an  empty  car  re
sults  in a  highly  unstable  distribution  of 
weight.  If  this  cannot  be  avoided,  drive  at  very 
low  speeds  only  to  avoid  the  risk  of  losing 
steering  control. 
A "balanced"  rig  is  easier  to  operate  and  con
trol.  This  means  that  the  tow  vehicle  should  be  loaded  to  the  extent  possible  and  permissi
ble,  while  keeping  the  trailer  as  light  as  possi
ble  under  the circumstances . Whenever  possi
ble , transfer  some  cargo to  the  luggage  com
partment  of  the tow  vehicle  while  observing 
tongue  load requirements  and  vehicle  loading 
considerations. 
Speed 
The  higher  the  speed,  the  more  difficult  it be
comes  for  the  driver  to control  the  rig.  Do not  .,. 
• 
•  
Page 216 of 314
214  Trailer towing 
drive at  the  maximum  permissible  speed.  Re
duce your speed  even  more  if load, weather  or 
wind condit ions are  unfavorable  -part icu larly 
when  going  downhill. 
Reduce vehicle speed 
immedi atel y if the  trail 
er shows  the  slightest  sign of swaying . 
Do not 
tr y to  stop th e sway ing by acceler ating . 
Observe speed  limi ts. In some  areas,  speeds 
for vehicles towing  trailers  are  lower than  for 
regular  vehicles . 
A lways apply brakes  early. When  driv ing 
downhill,  shift  into  a lower gear  to  use the  en
gine  braking effect  to  slow the  vehicle . Use of 
the  brakes  a lone  can cause  them  to  overheat 
and  fail. 
Coolant  t emperature 
The coolant  temperature  gauge ¢ page  10 
must  be observed  carefully. The coolant  tem
perat ure can  increase  if you drive on long  in 
clines in a  low gear  at  high engine  speeds.  Re
duce your speed  immediate ly if the  L EDs in 
the  top  part  of the  display turn  on. 
F or  more  in formation  about  indicator  lights, 
refer  to. ¢ 
page  16. 
A WARNING 
Anyone not  properly restrained  in a mov
ing veh icle is at  a much  greater  risk in an 
accident . Never let  anyone  ride  in your car 
who is not  properly wear ing t he  restra ints 
provided  by Aud i. 
Trailer  towing  tips 
Important  to  know 
Your vehicle hand les  different ly when  towing 
-
a trailer  because  of the  addit ional weight  and 
d ifferent  weight  distribution . Safety,  perform
ance  and  economy w ill greatly  depend  on how 
carefully you  load your trailer  and  operate 
your  rig. 
Before you actually  tow your trailer,  practice 
turning,  stopp ing and  back ing up  in an area 
away from  traffic . Keep practicing until you  have become  completely  familiar  with the  way 
your vehicle-trailer  combination  behaves  and  responds . 
Backing up is diffi cult  and  requ ires practice . 
Backing up with  a trailer  gene rally req uires 
steering  action  opposite  to  that  when  backing 
up your vehicle without  a tra iler. 
Maintain a greater  d ista nce between  you r ve
hicle and  the  one  in front  of you . You wi ll need 
more  room to  stop.  To compensate  for the 
trailer,  you w ill need  a  larger  than  normal 
turning  rad ius. 
When  passing,  remember  that  you cannot  ac 
ce lerate  as fast  as you norma lly would  be
ca use of the  added  load.  Make sure yo u have 
enough  room to  pass.  After passing,  allow 
plenty  of room for your  trailer be fore chang
ing lanes  again . 
Avoid jerky starts,  sharp  turns  or rapid  lane  changes. 
(D Tips 
- Do not tow  a trailer  during  the  break-in 
period  of your vehicle . 
- If you tow  a trailer,  your Audi may re 
quire more  frequent  maintenance  due  to 
the  extra  load  ¢ 
page  292. 
Parking  on  a slope 
Do not  park  on a slope  with  a trailer.  If  it  can
not  b e avoided,  do so only  after  doing  th e fol
lowing: 
When  par king: 
.,.  App ly the  foot  brake. 
.,.  Have someone  p lace chocks under  both  the 
vehicle and  the  tra iler wheels . 
.,.  With chocks in place,  slowly release  the 
brakes  unt il the  wheel  chocks absorb  the 
load . 
.,.  Turn the  whee ls towards  the  curb . 
.,.  Apply the  parking  brake . 
.,.  Select  the  P se lector  lever posit ion. 
When  re starting  after  parking: 
.,.  App ly the  foot  brake.