check engine light AUDI A4 2018 User Guide
Page 101 of 403
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Trailer  towing Driving  with  a  trailer 
General  information 
Your Audi was  designed  primarily  for passenger  
transportation . 
If  you  plan  to  tow  a trailer,  please  remember  that  
the  additional  load  will  affect  durability,  econo my and  performance. 
Trailer  towing  not  only  places  more  stress  on  the 
vehicle,  it  also  calls  for more  concentration  from 
the  driver. 
For  this  reason,  always  follow  the  operating  and 
driving  instructions  provided  and  use  common 
sense. 
Technical  requirements 
Trailer  hitch 
Use  a weight-carrying  hitch  conforming  to  the 
gross  trailer  weight.  The  hitch  must  be  suitable 
for  your vehicle  and trailer  and must  be mounted 
securely  on  the  vehicle's  chassis  at  a technically 
sound 
location . Use  only  a trailer  hitch  with  a  re
movable  ball  mount . Always  check with the trail
er  hitch  manufacturer  to  make  sure  that you  are 
using  the  correct  hitch. 
Do not use  a bumper hitch. 
The  hitch  must  be  installed  in such  a way that  it 
does  not  interfere  with  the  impact -absorbing 
bumper  system.  No modifications  should  be  
made  to  the  vehicle  exhaust and brake  systems . 
From  time  to  time,  check  that  all  hitch  mounting 
bo lts  remain  securely  fastened. 
When  you  are  not towing  a trailer, 
remove the 
tra iler  hitch  ball  mount . This  prevents  the hitch 
from  causing  damage  shou ld your  vehicle  be 
struck  from  beh ind  ¢ 
,&. . 
Trailer  brakes 
If your  trailer  is  equipped  with  a  braking  system, 
check  to  be  sure  that it conforms  to  all  regula
tions . 
Trailer  towing 
The  trailer  hydraulic  brake  system  must  not  be 
directly  connected  to  the  vehicle's  hydraulic 
brake 
system ¢.&. . 
Safety  chains 
Always use  safety  chains  between  your  vehicle 
and  the  trailer. 
Trailer  lights 
T ra iler  lights  must  meet  all regulations . Be  sure 
to  check  w ith  your  author ized  Audi dealer  for  cor
rect  wiring, switches  and  relays. 
Mirrors 
If you  are  unable  to  see  the  traffic  behind  you  us 
ing  the  regular  outside  mirrors,  then  you 
must in
stall  extended  mirrors. It  is  important  that  you 
always have  clear  vision  to the  rear. 
,8. WARNING 
After  removing  the  traile r hitch,  do  not store 
it  in your  vehicle.  In  case  of  sudden  braking, 
the  hitch  could  fly forward and  injure  you  or 
your  passengers. 
Operating  instructions 
Maximum  trailer  weight 
A trailer for your  vehicle  is  limited  to  a  typical 
class  1  or  class  2  trailer. 
Trailer  load  distribution 
Be sure  the  load  in the  trailer  is  held  securely  in 
place  to  prevent it  from  shifting  forward,  back
ward  or  sideways. 
Never  allow a passenger  to ride in a trailer ¢.&. 
in  Driver  messages  on page  100 . 
Engine cooling  system 
Towing  a trailer  makes  the  engine  work  harder.  It 
is  important  that  the cooling  system's  perform 
ance  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  tire  pressure  listed  under  "Full 
load" on  the  label ¢ page  344. Inflate  trailer 
99  
Page 102 of 403
Trailer  towing 
tires  to  tra iler  and  tire  manufacturers ' specifica
tions. 
Lights 
The  headlig ht  settings  should  be  chec ked  with 
the  t railer  at tached  before  d riving  off.  Check  to 
make  su re  both  vehicle  and  trailer  lights  are 
wo rking  properly. 
Safety  chains 
Be sure  t railer  safety  chains  are  properly  connect
ed  from  the  trai le r  to  the  h itch  on  the  veh icle. 
L eave  enough  sla ck in the  c ha ins  to  permi t turn
ing  corners . When  you  install  safety  chains,  ma ke 
sure  they  wi ll not  drag  on  the  road  when  yo u are 
driv ing . 
The  cha ins  shou ld  cross  u nder  the  trailer  tongue 
to  prevent  it from  dropp ing  in case  of  separation 
from  the  h itch . 
Driver messages 
Driving with  a trailer  requires  extra  caution. 
Weight  d istribution 
Towing  a  loaded  trailer  w ith  an  empty  car  resu lts 
in a  hig hly unstable  dist ribution  of  weight . If this 
cannot  be  avo ided,  drive  at  very  low  speeds  on ly 
to  avoid  the  risk  of  losing  s teering  con trol. 
A  "balanced " rig  is eas ier  to  operate  and  control. 
This  means  that  the  tow  vehicle  should  be  loaded 
to  the  extent  possible  and  permissible , while 
keep ing  the  tra ile r as  lig ht  as  possib le  under  t he 
circumstances . Whenever  possible,  t ransfer 
some  cargo  to  the  l uggage  compartment  of  the 
tow  vehicle  whi le  observ ing  tongue  load  req uire
ments  and  ve hicle  loading  conside rat ions. 
Speed 
The  h igher  the  speed,  the  more  d ifficult  i t be
comes  for  the  drive r to  contro l the  rig.  Do not 
d rive at  the  maximum  permissible  speed.  Reduce 
your  speed  even  more  if load,  weath er or  w ind 
conditions  are  unfavorable 
-part icularly  when 
going  downhill. 
100 
Reduce  vehicle  speed immediately if  the  trailer 
shows  the  slightest  sign  of  swaying. 
Do not try 
to  stop  the  swa ying by a ccelerating. 
Observe  speed  limits.  In  some  a reas,  speeds  fo r 
vehicles  towing  tra ilers  are  lower  than  for  regular 
vehicles . 
Always  apply  bra kes  early.  Whe n driving  down
hill,  shift  in to a  lower  gea r to  use  the  eng ine 
b raking  effect  to  slow  the  vehicle . Use of  the 
bra kes  alone  can  cause  them  to  overheat  and  fai l. 
Coolant  temperature 
The coo lant  tempe rat ure  gauge 9 page  11 must 
be  obse rved  caref ully. The  coolant  temperature 
can  increase  i f you  drive  o n long  inclines  in a  low 
gear  at  high  engine  speeds . Reduce  your  speed 
immediately  if the  LEDs in th e top  part  of  the  dis
play  turn  on.  
For  more  info rmation  abou t  indicator  lig hts,  re
fer 
to . ~page 30 . 
A WARNING 
Anyone not prope rly  restrained  in a moving 
vehicle  is  at  a  much  greater  risk  in an  acci
dent.  Never  let  anyone  ride  in your  car  who  is 
not  properly  wear ing  the  restraints  provided 
by Aud i. 
Trailer  towing 
information 
' Important  to  know 
-
Your  vehicle  handles  differently  when  towing  a 
trailer  because  of  the  addit ional  weight  and  dif
ferent  weight  distribution . Safety,  performance 
and  economy  will  greatly  depend  on  how  ca refu l
l y you  load  your  tra ile r  and  ope rate  yo ur  rig. 
Before  you  actually  tow  your  trailer,  pract ice 
turning,  stopping  and  backing  up  in  an  area  away  
from  traffic . Keep  pract icing  u ntil  you  have  be
come  complete ly familiar  w ith  the  way  yo ur vehi
cl e- tra ile r combination  behaves  and  respo nds.  
Page 316 of 403
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Checking  and  Filling  
Gasoline 
Fuel  supply 
Applies  to:  veh icles with  gaso line  engine 
Using  the right  fuel  helps  keep the  environment 
clean  and prevents  engine  damage . 
Fuel  recommendation 
The fuel recommended  for your vehicle  is unlead
ed  premium 
grade  gasoline.  Audi  recommends 
using  TOP TIER Detergent  Gasoline with  a mini 
mum  octane  rating  of 91  AKI (95  RON). For more 
information  on  TOP TIER Detergent  Gasoline, 
p lease  go to  the  official website 
(www.toptiergas .com) . 
The recommended  gasoline  octane  rating  for 
your  engine  can also  be found  on  a label  located 
on the  inside  of the  fuel  filler flap . This  rating 
may be  specified  as AKI or  RON. 
Your vehicle  may also  be operated  using  unlead
ed  regular  gasoline  with  a min imum  octane  rat 
ing  of 87 AKl/91  RON. However, using  87 AKl/91 
RON  octane  fuel will slightly  reduce  engine  pe r
formance. 
Use  unleaded  gasoline only. Unleaded  gasoline 
is  available  throughout  the  USA , Canada,  and  in 
most  European  countries . We  recommend  that 
you  do  not  take  your vehicle  to areas  or countries 
where  un leaded  gasol ine  may  not be available. 
For more  information  on  refueling  your vehicle, 
see 
c::> page 317 . 
Octane  rating 
Octane  rating  indicates a gasoline's  ability  to  re
sist  engine  damaging  "knock" caused  by prema
ture  ignit ion  and  detonation . Therefore , buy ing 
the  correct  grade  of gasoline  is very  important  to 
h e lp  prevent  possible  engine  damage  and  a  loss 
of eng ine performance. 
Gasoline  most  commonly  used  in  the  United 
States  and  Canada  has  the  following  octane  rat
ings that  can  usually  be found  on  the  filler  pump: 
- Premium  Grade: 91 
-96  AKI 
Checking  and Filling 
-Regu lar Grade:  87 -90  AKI 
E xplanation  of the  abb reviations: 
AKI = 
Anti Knock Index = (R +M)/2  = (RON +MON)/ 
2 
RON = R esearch  Octane Number 
MON = Motor Octane  Number. 
(D Note 
- Do not  use any  fuel w ith  octane  ratings  low
er  than  87  AKI or 91  RON otherwise  expen
sive  engine  damage  w ill occur . 
- Do 
not us e leaded  gasoline.  The use  of  lead
ed  gasoline  will severe ly damage  your  vehi
cle's  catalytic  converter  and  its  ability  to 
control  exhaust  emissions . 
Blended  gasoline 
Applies  to:  vehicles with  gasoline  engine 
Use  of gasoline  containing  alcohol  or MTBE 
(methyl  tertiary  butyl  ether) 
You may  use  unleaded  gasoline  blended  with  al
cohol  or MTB E (commonly  referred to  as  oxygen 
ates)  if  the  blended  mixture  meets  the  following 
criteria: 
Blend of  gasoline  methanol  (wood  alcohol  or 
methyl  alcohol) 
-Anti -knock index  must  be 87  AKI or  higher. 
- Blend must  contain  no more  than  3%  metha-
nol. 
- Blend must  contain  more than 2% co-solvents. 
Blend of  gasoline  and ethanol  (grain alcohol  or 
ethyl  alcohol) 
- Anti-knock index  must  be 87  AKI or higher. 
- Blend must  not  conta in more  than  15%  etha-
nol. 
Blend of  gasoline  and  MTBE 
- Anti-knock index  must be 87  AK I or  higher. 
- Blend must  contain  not  more  than  15% MTBE. 
Seasonally  adjusted  gasoline 
Many gasoline  grades  are  blended  to  perform  es
pecially well for winter  or summer  dr iving . Dur-
ing  seasonal  change-over,  we suggest  that  you 
..,. 
315  
Page 323 of 403
Check ing  and  F illing 
"' Position the  bottle  on  the  filler  tube  and  turn 
the  bottle  clockwise  unti l it  stops  turning. 
"' Press lightly  aga inst  the  bottom  of  the  bott le 
to  empty  it.  Continue  pressing  the  bottom  of  
the  bottle  until  it  is empty  or  unti l fluid  stops 
flowing  into  the  tank . 
"' Remove  the  bottle  and  seal  the  filler  neck 
¢ page  322,  Completing  AdBlue  refill . 
0 Note 
Only use  refill  bottles  that  are  approved  for 
your  vehicle.  Us ing  other  systems  can  ca use 
Ad Blue to  leak.  
-You can  obta in  refill  bottles  from  an  author
i zed  Audi  dealer  or  authorized  A udi Service 
F ac ility. 
- A pe rm itted  refill  bottle  conta ins  approxi
mately  0 .5 gallon  ( 1.9  liters)  of  Ad Blue. 
Completing  AdBlue  refill 
Applies  to:  vehicles with  selective  catalytic  reduction 
Closing  the  filler  neck 
"'Turn the  Ad Blue  cap  to  the  r ight  on  the  filler 
tube  unti l th e cap  cl ic k s  into 
p lace ¢.&. in 
Prepara tion on page  320, 
¢ (Din Preparation 
on page  320 .. 
"' Then press  on  the  left  side  of  the  tank  door  un-
ti l it  latches. 
After  filling 
The  vehicle  must  be  driven  so  tha t the  system 
recognizes  t hat  the  Ad B lue was  refilled.  This can 
t ake  severa l m in utes. 
"' If there  was  no Ad  Blue  left  in  the  tank  and  a 
r ange  of  O mi  (0  km)  was  shown  in the  d isplay, 
swi tch the  ign ition  on  fo r abo ut  30  seconds  be
f ore  star ting  the  engine . 
(D Tips 
Ad Blue  in the  tank  can  free ze  at  very  low  tem
pera tures.  If  this  happens,  the  system  will 
not  detect  that  the  AdB lue  was  refilled  and  it 
w ill  contin ue to  inform  you  of  the  low  AdBlue 
322 
leve l. The  message  tu rns  off  as  soon  as  the 
tank  thaws  out  again . 
Emissions  control 
systems 
Cat alytic  converter 
Applies  to:  vehicles with  gasoline  engines 
T he vehicle  may  only  be  driven  w ith  un leaded 
gaso line,  otherwise  the  catalytic  converter  will  be 
destroyed . 
Never  drive  unti l the  tan k is comp lete ly empty . 
T he  irregu lar  supply  of  fuel  that  resu lts  from  that 
can  cause  eng ine  misfires.  Uncombusted  fuel  will 
enter  the  exhaust  system , which  can  cause  over
heating  and  damage  to  the  catalytic  converte r. 
Di esel  particulate  filt er 
Applies  to:  vehicles with  diesel  engines 
The  diese l particulate  filter  filters  nearly  all  of 
the  soot  part icles  out  of  the  exhaust.  The  filter 
cleans  itself  automat ica lly under  norma l dr iv ing 
cond it io ns.  If  the  filter  cannot  clean  itself  (for  ex
amp le, because yo u are on ly driving short distan 
ces),  the  filter becomes  clogged  with  soot  and 
the 
1111 i ndicato r light  for  the  diese l particulate 
filte r tu rns 
on ¢ page  33. 
_&. WARNING 
The  tempera ture  o f the  e xhaust  sys tem  is 
h igh,  both  when  driving  and  a fter  stopping 
the  engine. 
-
-Never  tou ch the  e xhaus t  tail  p ipes  o nce  they 
have  become  hot.  This  cou ld  resu lt  in  burns. 
-D o  not  p ark your  vehicle  over  flamm able 
materials  such  as  grass  or  leaves  because 
the  hig h temperature  of  the  emissions  con
trol  system  (catalyt ic converter  or  d iese l 
pa rticu late  filter)  co uld  start  a fire. 
- Do not  apply  underbody  protectant  in the 
exhaust  system  area,  beca use  this  increases 
the  risk  of  f ire.  
Page 325 of 403
Checking  and  Filling 
_& WARNING 
California  Proposition  65  Warning: 
- Engine  exhaust,  some  of  its constituents , 
and  certain  vehicle  components  contain  or  emit  chemicals  known  to  the  State  of  Cali
fornia  to  cause  cancer  and  birth  defects  and  reproductive  harm.  In  addition,  certain  flu 
ids  contained  in vehicles  and  certain  prod 
ucts  of component  wear  contain  or  emit 
chemicals  known  to  the  State  of  California 
to  cause  cancer  and  birth  defects  or  other  reproductive  harm. 
- Battery  posts,  terminals  and  related  acces
sories  contain  lead  and  lead  compounds,  chemicals  known  to  the  State  of  California 
to  cause  cancer  and  reproductive  harms. 
Wash  hands  after  handling. 
(D Note 
When  filling  fluids,  be  sure  not  to  mix the  flu ids  up . Otherwise  severe  malfunctions  and 
en
gine  damage  will  occur. 
@ For the  sake of the  environment 
You  should  regularly  check  the  ground  under 
your  vehicle  in order  to  detect  leaks  quickly . If 
there  are  visible  spots  from  oil or  other  fluids, 
bring  your  vehicle  to  an  authorized  Audi deal
er  or  authorized  Audi Service  Facility  to be 
checked. 
Opening  and closing the  hood 
The hood  is released  from  ins ide  the  vehicle. 
Fig.  266 Drive r footwell : rele ase  le v er 
324 
Fig.  267  Unlocked  hood: lev er 
Make sure  the  wiper  arms  are  not  raised  up  from 
the  windshield.  Otherwise  the paint  could  be 
damaged . 
Opening  the  hood 
"'With the  driver's  door  open,  pull  the  lever be
low the  instrument  panel  in the  direction  of the 
arrow 
9 fig . 266 . 
"' Raise  the hood  slightly 9 ,&. 
"'Press the lever ~ fig. 267 in the  direction  of the 
arrow.  This releases  the  hooks. 
"' Open  the  hood. 
Closing the  hood 
"' Push  the  hood  down  until  you  override  the 
force  of the  struts . 
"'Let the hood  fall  lightly  into the latch . Do not 
press  it in. 
9 ,& . 
_& WARNING 
-Never open  the  hood  when  there  is steam  or 
coolant  escaping  from  the  engine  compart
ment,  because  there  is a  risk that  you  could 
be  burned.  Wai t until  no  steam  or  coolan t is 
escaping. 
- For safety  reasons,  the  hood  must  always  be 
closed  securely  while  driving . Because  of 
this,  always  check  the  hood  after  closing  it 
to  make  sure  it is  latched  correctly . The 
hood  is latched  if  the front  corners  cannot 
be  lifted . 
- If you  notice  that  the  hood  is not  latched 
while  you  are  driving,  stop  immediately  and 
close  it,  because  driving  when  the  hood  is 
not  latched  increases  the  risk  of an  accident. 
,...  
Page 327 of 403
Check ing  and  F illing 
I f you must  add  oi l between  oi l changes,  use  an 
oil that  matches  the  Audi oi l quality standard 
listed  on the  st icker. The sticker  is located  at  the 
front  of the  engine 
compartment <=> page  325, 
fig.  268. 
Au di r ec omm end s 
ocastrol i/g/g'fE:@t P'r(w.:::-..~J.D,'JAJ.. 
A udi  r ecommends  Longli fe high  performa nce 
e ngin e oil  from  Audi  G enuin e Part s 
Using the  proper  engine  oil is important  for  the 
functionality  and  service life of the  eng ine. Your 
engine  was factory-filled  with  a h igh-quality  oil 
which can usually  be  used  throughout  the  entire  
yea r. 
0 Note 
Your Limited New Vehicle Warranty  does  not 
cover damage  o r malfunctions  due  to  failure 
to follow  recommended  maintenance  and  use  
requirements  as  set  fo rth  in the  Aud i Owner's 
Man ual and  Warranty 
& Maintenance  booklet. 
- Use only a high qual ity eng ine oi l th at  ex-
p ressly complies  with the  Audi oil q uality 
standard  specified for your vehicle's  engine . 
Using any other  oil can cause  se rious engine 
damage . 
- Do not  mix any lubricants  or other  additives  into the  engine  oil. Doing so can cause  en
gine  damage. 
(D Tips 
If you need  to  add  oil and there  is none  availa 
ble that  meets  the  Audi oi l quality standard 
your engine  requi res, you may add  a total  of 
no more  than  0.5  qt  (0.5  l) of a h igh-quality 
"synthet ic" o il that  meets  the  following speci
fications.  
- Vehicles with  gasoline  eng ine: ACEA A3 or 
API SM with a viscosity grade  of SAE OW-30,  
SAE 5W-30  or SAE 5W-40. 
- Vehicles w ith  diesel  eng ine: ACEA C3 or 
API CF with  a v iscosity grade  of SAE OW-30 
or SAE 5W-30 . 
- For more  information  about  engine  oi l that 
has  been  approved  for your vehicle,  please 
contact  eithe r your authorized  Aud i dealer 
or Audi Custome r Relat ions  at 
326 
1  (800)  822-2834  or visit our web  site  at 
www.audi usa .com or www .audicanada .ca. 
Engine oil consumption 
The  engine  in your  vehicle depends  on an ade
quate  amount  of oil to lubricate  and  cool all of  
its  moving  ports. 
In order  to  prov ide  effect ive  lub ricat ion and  cool 
ing of internal  engine  components,  all internal  
combustion  engines  consume  a certain  amount  
of oil. Oil consumption  var ies from  engine  to  en
gine and  may change  significantly  over the  life of 
the  engine.  Typically, engines  w ith  a specified 
break-in  period 
(see<=> page  80)  consume  more 
o il dur ing the  break-in  per iod than  they  consume 
after  o il consumption  has  stabi lized . 
U nder  normal  cond itions,  the  rate  of oil con
sumption  depends  on the  quality  and viscos ity of 
the  oil, the  RPM (revolutions  per  m inute)  at 
wh ich the  engine  is operated,  the  amb ient  tem
perature  and  road  condit ions.  Furthe r facto rs a re 
t h e amo unt  of o il di lution  from  wate r condensa
t ion or fue l residue  a nd the  oxidat ion level of  the 
oi l. As any engine  is subject  to  wear  as  mileage 
builds  up, the  oi l consumption  may increase  ove r 
ti me  until  replacement  of worn  components  may 
become  necessary. 
With  a ll these  variab les  coming  into  p lay, no 
standard  rate  of oil cons umption  can be estab 
li shed  or specified . There  is no alternative  to  reg
ular and  frequent  checking of the  oil level, see 
Note . 
If the  yellow engine  oil leve l warning  symbo l El 
in the  instrument  cluster  lights  up, you should 
check the  o il level as  soon  as  possible 
<=> page  32  7. Top off the  o il at your earliest  con
venience 
<=> page  32  7. 
A WARNING 
Before you check anyth ing  in the  e ngine com
partment,  always read  and  heed  all WARN
I NGS<=> .&. in Working  in the  engine  compart-
ment  on page  323. 
1iJ>,  
Page 330 of 403
areas,  into  open  streams  or  down  sewage  
drains. 
- Recycle  used  engine  oil  by taking  it to  a  used 
engine  oil collection  facility  in your  area,  or 
contact  a service  stat ion . 
Cooling  system 
Coolant 
The  engine  coo ling  system  is filled  with  a  mixture 
of  purified  water  and  coolant  additive at the  fac
tory.  This  coolant  must  not  be  not  changed. 
The  coolant  level is  monitored  through 
the. in
dicator  light 
¢ page  30. However , we  do  recom
mend  occasiona lly  checking  the  coolant  level 
manually. 
If you  must  add  coolant,  use  a  mixture  of  water 
and  coolant  addit ive.  Mixing  the  coolant  additive 
with  distilled  water is recommended. 
Coolant  additive 
The coolant  additive  is made  of  anti -freezing  and 
corrosion  protection  agents.  Only  use  the  fol low
ing  coolant  additives . These  additives  may  be 
mixed  with  each  other. 
Coolant additive  Specification 
G13 
TL 774 J 
G12++  TL 
774  G 
The  amount  of  coo lant  additive  that  needs  to  be 
mixed  with  water  depends  on  the  climate  where 
the  vehicle  will  be  operated.  If  the  coolant  addi
tive  percentage  is too  low,  the  coolant  can  freeze 
and  damage  the  engine. 
Coolant  Freeze protec- 
additive  tion 
Warm  min . 40% min. -13  °F 
regions  max . 
45% (
- 25 °() 
Cold  min. 
50% max
. -40 °F 
regions  max. 
55%  (-40 °() 
(D Note 
-
Before  the  start  of  winter,  have  an  author 
ized  Audi  dealer  or  authorized  Audi Service 
Facility  check  if the  coolant  additive  in your 
Checking  and  Filling 
vehicle  matches  the  percentage  appropriate  
for  the  climate.  This  is especia lly important 
when  driving  in colder  climates. 
- If  the  appropriate  coo lant  additive  is  not 
available  in an  emergency,  do  not add  any 
other  additive.  You could  damage  the  en
gine.  If  this  happens,  only  use  water  and  re
store  the  correct  mixture  ratio  with  the 
specified  coolant  add itive  as  soon  as  poss i
ble . 
- Only refill  w ith  new  coolant. 
- Radiator  sealant  must  not  be  mixed  with 
the  coolant. 
Adding  coolant 
Fig. 270 E ngine  compartment:  re lease  button  on coolant 
expansion  tank 
Observe  the  safety  precautions ¢,&. in Working 
in  the  engine  compartment  on page  323. 
Checking the engine  coolant  level 
.. Park  the  vehicle  on  a  level  surface . 
.. Switch  the  ignition  off . 
.. Read  the  coolant  level  on  the  coolant  expansion 
tank 
¢ fig.  270. 
.. The  coolant  level must  be  between  the  MIN and 
MAX markings  when  the  engine  in  co ld.  When 
the  engine  is warm  it  can  be  slightly  above  the 
MAX marking. 
Adding  coolant 
.. Let the  eng ine  cool  down . 
.. Place  a cloth over the  coolant  expansion  tank 
cap . 
.. Push  the  release button ¢ fig.  2 70 and  carefu l
ly  unscrew  the  cap  to  the  left  until  you  feel  re-
sistance¢ ,A. IIJ,-
329  
Page 333 of 403
Checking  and  Filling 
Charging  the  vehicle  battery 
Fig. 272 Engine co mpa rtment : connec tors  for  a  c harger 
and  jump  start  cab le s 
Req uirement:  only  use  chargers  with  a m aximum 
c hargi ng  vo lta ge  of 30  amp s/14.8  Volt s. 
The 
vehicle  battery  cables  remain  connected  . 
.,. Read  the  warnings c> .&. in General warnings 
about  batteries  on page  331 
and c> ,&. . 
.,. Switch  off  the  ignition  and  all  electrical  equip 
ment  . 
.,. Open  the  hood 9 page  324 . 
.,. Open  the  red  cover  on  the  positive  terminal 
c>fig. 272 . 
.,. Clamp  the  charger  terminal  clamps  to  the jump 
s ta rt pin s 
according  to  the  instruct ions . (pin 
under  the  red  cover = "positive ",  p in with  hex
agonal  head=  "negative ") . 
.,. Inse rt the  powe r cable  for  the  charg ing  device 
i nto  the  socke t and  switch  the  dev ice  on . 
.,. At the  end  of the  charging  process , switch  the 
charger  off  and  pull  the  power  cab le  out  of the 
socket  . 
.,. Remove  the  charger  terminal  clamps. 
.,. Close  the  red  cover  on  the  positive  terminal. 
.,. Close  the  hood c> page  324 . 
A WARNING 
-A highly  explosive  mixtu re of  gases  can  form 
when  cha rging  batter ies.  On ly charge  the 
vehicle  batte ry  in well-ven tilated  areas. 
- A drai ned  vehicle  battery  can  freeze  at  tem
peratu res  a round  32 
QF (0 QC). A froze n or 
thawed  veh icle  bat tery  must  not  be  charged 
and  must  not  be  used  anymore.  The  ba ttery 
housing  can  crac k and  battery  acid  can  leak 
o ut  if ice forms,  wh ich  increases  the  r isk of 
an  exp losion  and  chemical  burns.  Contact  an 
332 
author ized  Audi  dealer  or  authorized  A udi 
Service  Facility for  more  information. 
- Do not  connect  or  disconnect  the  charging 
cable  whi le  charging  because  this  increases 
the  risk  of an  explos ion. 
@ Tips 
- Only charge  the  vehicle  battery  t hrough  the 
connect ions  in the  engine  compartme nt. 
- Read  all  of  the  manufacturer's  instructions 
for  the  charger  before  charging  the  vehicle 
battery. 
Windshield  washer system 
Fi g. 2 7 3 Engine  compar tm ent:  washer  flui d  res ervoir  cap 
The windshield  washer  fluid  reservoir¢  contains  
t he  cleaning  solution  for  the  windshield  and  th e 
headlight  washer  system * 
c> page  325,  fig.  268 . 
The  reservoir  capaci ty can  be  found  in 
c> page 381. 
To reduce  the  risk of  lime  scale  deposits  on  the  
spray  no zzles,  use  clean  water  with  low amounts 
of calcium . Always  add  w indow  cleaner  to  the  wa
ter . When  the  outside  temperatures  are  cold,  an 
anti -freezing  agent  should  be  added  to  the  water 
so  that  it  does  not  freeze . 
(D Note 
-The  concentration  o f ant i-freez ing  agent 
must  be  adjusted  to  the  ve hicle  operat ing 
conditions  in the  respective  climate . A con
cent ration  t hat  is too  high  can  lead  to  vehi
cl e  damage. 
- Never  add  radiator  anti-freeze  or  other  addi
t ives  to  the  washer  fluid.  
Page 375 of 403
Emergency  situations 
Emergency  situations 
General 
This chapter  is intended  for  trained  emergency  crews and  working  personnel  who  have the  nec 
essary tools  and  equipment  to  perform  these  
operations. 
Starting  by  pushing  or 
towing 
(D Note 
Vehicles  with  an  automatic  transmission 
cannot  be started  by pushing  or towing. 
Starting  with  jumper  
cables 
If  necessary,  the  engine con  be started  by  con
necting  it  to  the  battery  of  another  vehicle. 
If the  engine  should  fail  to start  because  of  a  dis
charged  or  weak  battery,  the battery  can  be  con
nected  to  the  battery  of 
another vehicle,  using a 
pair  of jumper  cables to  start  the  engine. 
Jumper  cables 
Use only jumper  cables  of  sufficiently  large cross 
section 
to  carry  the  starter  current  safely.  Refer 
to  the  manufacturer's  specifications. 
Use only jumper  cables  with 
insulated terminal 
clamps  which  are distinctly  marked : 
plus(+)  cable in most  cases  colored red 
minus(-)  cable 
in  most  cases colored black. 
A WARNING 
Batteries  contain  electricity,  acid,  and  gas. 
Any of  these  can  cause  very  serious  or  fatal  in
jury.  Follow  the  instructions  below  for 
safe 
handling  of  your  vehicle's  battery. 
-Always  shield  your  eyes  and  avoid  leaning 
over  the  battery  whenever  possible. 
-A  dead  battery  can  freeze  at  temperatures 
around  32  °F (0  °C) . If  the  vehicle  battery  is 
frozen,  you  must  thaw  it before  connecting 
the  jump  start  cables. 
If you  do  not,  this  in-
374 
creases  the  risk  of  an  explosion  and  chemi 
cal  burns.  After  jump  starting  the  vehicle, 
drive  to  an  authorized  Audi dealer  or  author ized  Audi Service  Facility  immediately  to 
have  the  vehicle  battery  checked. 
- Do not  allow  battery  acid  to  contact  eyes  or 
skin . Flush  any  contacted  area  with  water 
immediately. 
- Improper  use  of  a  booster  battery  to  start  a 
vehicle  may  cause  an  explosion . 
- Vehicle  batteries  generate  explosive  gases. 
Keep  sparks,  flame  and  lighted  cigarettes 
away  from  batteries. 
- Do not  try  to  jump  start  any  vehicle  with  a 
low  acid  level  in  the battery. 
- The  voltage  of  the  booster  battery  must  also 
have  a  12-Volt  rating.  The  capacity  (Ah) of 
the  booster  battery should  not  be  lower 
than  that of the  discharged  battery.  Use  of 
batteries  of  different  voltage  or  substantial
ly  different 
"Ah" rating  may  cause  an  explo
sion  and  personal  injury. 
- Never  charge  a  frozen battery.  Gas  trapped 
in  the  ice  may cause  an  explosion. 
- Never  charge  or  use  a battery  that  has  been 
frozen.  The battery  case  may  have  be  weak
ened. 
- Use  of batteries  of  different  voltage  or  sub
stantially  different  capacity  (Ah)  rating  may 
cause  an  explosion  and  injury.  The  capacity  (Ah) of  the  booster  battery  should  not  be  
lower  than  that  of  the  discharged  battery. 
- Before  you  check  anything  in the  engine 
compartment,  always  read  and  heed all 
WARNINGS 
r=:> poge 323. 
([) Note 
-Applying  a higher  voltage  booster  battery 
will  cause  expensive  damage  to  sensitive  electronic  components,  such  as  control 
units,  relays,  radio,  etc. 
- There  must be  no  electrical  contact  between 
the  vehicles  as  otherwise  current  could  al
ready  start  to  flow  as  soon  as  the  positive 
(+) terminals  are  connected.  
Page 386 of 403
a co .... N ,.... 
N .... 0 0 
3 co 
@ For the  sake of the  environment 
-Changing  the  engine  settings  wi ll adversely 
affect  emission  leve ls. Th is is detrimental  to 
the  env ironment  and  increases fuel  con
sumption. 
- Always observe  environmental  regu lations 
when  disposing  of  old  engine  o il,  used brake 
flu id, d irty  engine  coolant,  spent  batteries 
or  worn  out  tires . 
- Undeployed  airbag  modules  and  pretension
ers might  be classified  as Perchlorate  Mate
rial  -spec ial  handling  may apply,  see 
www .dtsc.ca.gov/hazardouswaste/perchlo
rat e. When  the vehicle  or  pa rts  of  the  re
straint  system  including  airbag modules 
safety  be lts with  pretens ioners  are  scrap
ped, a ll applicab le  laws  and regulations 
must  be observed.  Your a uthorized  Audi 
dealer  is familiar  with  these  requirements  
and we  recommend  that  you  have your  deal er perform  this  service for  you. 
Accessories  and  
technical  changes 
Additional  accessories and  parts 
replacement 
Always  consult  on authori zed Audi  dealer  before 
purchasing  accessories. 
Audi  vehicles  that  are constructed  w ith  advanced 
materials  like  Steel/Aluminum  (Hybrid  construc
tion),  Aluminum  (Audi  Space Frame),  and/or  Alu minum/Carbon  Fiber  (Ultra  Advanced  Light 
We ight  Materials)  are as unique  as the ir drivers . 
Therefore,  the  ava ilability  of  certain  parts  needed 
for  repair , restoration , or  reconstruction  wi ll be 
restricted , or  parts  will  be unava ilable,  if  the ve
hicle  is not  repaired  at an a uthorized  Audi  colli
sion  repair  facility.  This includes but  is not  limit
ed to  structura l parts  which  require  specialized 
training  and equipment  to  restore  their  crash 
worthiness  back to  the  original  NHTSA and IIHS  performance. 
Your vehicle  incorporates  the  latest  safety  design  
features  ensuring  a high  standard  of  active  and 
passive safety. 
Consumer  Inf ormation 
This  safety could  be compromised  by non-ap 
proved  changes to  the  vehicle.  For this  reason,  if 
parts  have to  be rep laced,  please observe the  fol
lowing  points  when  install ing additional  accesso
ries: 
Approved  Audi  accessories and genuine  Audi  parts  are avai lab le from  authorized  Aud i dea lers. 
T hese dea le rs  also  have the  necessa ry  facilities, 
tools  and trained  specialists  to install  the  parts 
and accessories properly . 
A WARNING 
-Using the  wrong  spare  parts  or  using  non-ap- 
proved  accessories can cause damage  to  the 
vehicle  and serious  personal  injury. 
- Use on ly accessories expressly  approved  by 
Aud i and genuine  Audi  spare  parts 
- These  parts and  accessor ies have been spe
cially  designed  to  be used on your  vehicle. 
- Do not  use  license plate  brackets  in the 
front  area that  are different  from  the  one 
installed  at  the  factory,  or  add additional 
li
cense plate  brackets. 
- Never  install  accessor ies such as telephone 
cradles  or  beverage  holders  on  airbag  covers 
or w ith in the  airbag  deployment  zones . Do
ing so will  increase the  risk  of  injury if  a ir
bags are triggered  in an accident! 
- Before you  check anyth ing  in the  engine 
compartment,  always read and  heed all 
WARNINGS 
9poge 323. 
(D Note 
- If  items  other  than  genu ine Audi  spare 
parts,  add -on  equipment  and accessory 
items  are used or  if  repair  work  is not  per
formed  according  to specified  methods,  this 
can result  in  seve re damage  to your  vehi
cle's  engine  and  body  (such  as corrosion) 
and adversely  affect  your  vehicle's warranty. 
- If  emergency  repa irs  must  be performed 
elsewhere,  have  the vehicle  exam ined by  an 
authorized  Audi  dealer as soon  as possib le . 
- The  manufacturer  cannot be held  liable  for 
damage  which  occurs  due to failure  to  com
ply  with  these  stipulations  . 
385