
Airbag system  .  . . .  . . .  . . .  . . .  . . . .  168  Trailer to\Ning  . . . .  . .  . . .  . . .  . .  . .  . .  224 
Important  things  to  know  . . .  . . . . 168 Driv ing  with  a trailer  .  . . .  . . . .  .  .  .  . 224 
Front  airbags  .  . . .  .  . .  .  .  . . .  .  . .  .  . . 172 Trailer  towing  tips .  . . .  .  .  . . . .  . .  . . 226 
Monitoring  the  Advanced  Airbag 
System  .  . . .  .  . .  .  .  .  .  .  .  .  . . .  . . .  . . . 
179 
Knee  airbags  . .  . .  .  . .  .  . .  .  .  . .  .  . .  . 184 
Side  a irbags  .  .  .  . . .  .  • .  .  .  .  .  . .  . . .  . 187 
Child  Safety  . .  . . .  . . .  . .  .  . . .  . .  . . . .  190 
Impor tant  things  to know  . .....  . 
Child  safety  seats  .............  . 
Insta lling  a  chi ld  safety  seat  ....  . 190 
195 
200 
Add it ional  Information  ....... ..  . 203 Vehicle  care  . . . . .  . .  .  . . . .  . . . 229 
Lower  anchorages  and  tethe r for 
children  (LA TCH)  . .. ... ... ... ...  . 
205  Cleaning  and protection  . . .  . .  . .  230 
~----
t 
Vehicle  operation  .... ...  . 211 
212 
212 
2 12 
215 
Intelligent 
technology  ... ... ... . 
Notice  about data recorded  by 
ve hicle  contro l modules  .. .....  . 
Electronic  Stabilization  Program 
(ESPJ  . .... ... ......... ... ... .. . 
B rak ing  ..... ... .... .... ... ... . 
Servotronic®  -advanced  power 
steering  system  ............... . 
Driving  with  your  quattro®  ..... . 
Driving  and  environment  .... . .  217 
2
18 
2 19 
The  first 1,000 miles (1,500 km)  and 
afterwards  .  .  .  .  .  .  .  .  .  . .  . .  .  . .  .  . .  . 
21 9 
Catalytic  converter  .  .  . .  . .  .  .  .  .  . . . 
220 
Avoid  damaging  the  ve hicle  . . . .  . 221 
Operate  your  vehicle  economically 
and  minimize  pollution  .  .  . .  . .  .  .  . 
221 
General  information  ...........  . 
Care  of  exterior  ................  . 
Care  of inte rior  ...... .... ... ...  . 
Fue l supply  and  filling  your  fuel 
tank  ...........................  . 
Gasoline ........... ...........  . 
Fuel  tank  .....................  . 
Checking and  filling  .. ... ......  . 
Engine  hood ......... .........  . 
Engine  compartment  ...... ... . . 
Engine  oil .....................  . 
Engine  cooling  system  .........  . 
Brake  fluid  ................ ... .  . 
Battery  . ... ... ... .............  . 
W indshield /headligh t washer 
rese rvoir  ......................  . 
Tires and \Nheels  .......... ....  . 
Tires  ..... .. ..... ... .. - . -.. •  ·  ·  · 
230 
230 
238 
244 
244 
245 
249 
249 
251 
252 
257 
260 
261 
266 
267 
267 
Table  of  contents 
Do-it-yourself  service  ... 289 
What  do I do  no\N?  . . . .  .  . .  .  .  . . .  .  290 
Trunk  escape  ha ndle  .  .  . .  . . .  .  . .  .  . 290 
Jack,  tools  and  spare  wheel  . .  .  . .  . 290 
Whee l change  .............. .... 293 
Fuses  and  bulbs  . . . .  .  . . .  . .  . .  . .  . .  300 
Fus es ................. ......... 300 
Bulbs  .......................... 302 
Emergency  situations  .  .  . . .  . .  . .  .  304 
Genera l ... .. ... ....  _ ..  _ ...... .. 304 
Starting  by  pushing  or  towing . .  .  . 304 
Starting  with  jumper  cables  . .  .  .  .  . 304 
Use  of jumpe r cables  .  . .  .  .  . .  . .  .  .  . 305 
Em ergency  towing  with  commercial 
tow  truck  ... ......... ....... ..  . 
Lifting  vehicle  .................  . 
Technical  data 
General  information  306 
308 
311 
312 
Explanation 
of  technical  data 312 
Vehic le  ide ntific ation  . .  . .  .  .  .  .  .  .  .  . 312 
Weights  ........................ 313 
Dimensio ns .  . . . . .  .  . . .  .  . .  .  .  . . . .  . 313 
~ehicle  care  irechnical data  

Driver  information  display 
symbols  appear  in the  instrument  cluster  display  to  alert  the  driver. 
The  warning  light  in  the  instrument  cluster  comes  on  when the 
tire  is  significantly  underinflated . 
The  warning  light  _, also  lights  up  during  a system  failure. 
When  the  wheel  is turning,  the  system receives  radio  signals  from 
sensors  located inside  each  tire . 
A  factory  spare wheel  is delivered  with  sensor.  However, the  spare 
wheel  is  not  checked  by the  tire  pressure  monitoring  system.  Such  monitoring  can  only occur after  the  spare  wheel has been  installed 
and  initialized ~ 
page 45. 
Be aware  that  tire  pressure  is also  dependent  on the  temperature  of 
the  tire.  For  every  18  °F (10 °C) increase  in tire  temperature,  tire pres
sure  increases  by about  1.5 psi  (0.1 bar).  The tire  warms  up while  the 
vehicle  is  moving  and tire pressure  rises. So you  should adjust tire 
pressure  only  when  they  are 
cold, when  tire  temperature  is  roughly 
the  same  as ambient  air  temperature. 
In  order  to keep  the  tire  pressure  monitoring  system  properly  cali
brated,  tire  pressure  on  all  four  tires  should  be checked  at  regular 
intervals,  adjusted  if  necessary and  saved  in the proper  setting 
(recommended  pressure)~ 
page 43. 
The  tire  pressure  is shown  on  the tire  pressure  label. On USA vehi 
cles, the  tire  pressure  label is located  on the driver's  side B-pillar.  On 
Canada  vehicles,  the  tire  pressure  label  is  located  either  on  the 
driver's  side  B-pillar  or  inside  the  fuel filler flap. The  tire  pressure 
label  lists  the  recommended  cold  tire  inflation  pressures  for  the 
vehicle  at its  maximum  capacity  weight  and  the  tires that  were  on 
your  vehicle  at the  time  it was  manufactured . For recommended  tire 
pressures  for normal  load  conditions,  please  see chapter 
~ page 277. 
& WARNING 
• When  the  tire  pressure  monitoring  system  warning  light  is lit, 
one or more of your tires  is significantly  under -inflated.  You should 
stop  and  check your tires  as soon as possible,  and  inflate  them  to 
& WARNING  (continued) 
the  proper  pressure as  indicated  on the  vehicle's  tire  pressure 
label 
~ page  271. Driving  on a  significantly  under-inflated  tire 
causes the  tire  to  overheat  and  can  lead to  tire  failure.  Under-infla
tion  also  is likely to  impair  the  vehicle's  handling  and  stopping  ability . 
•  Do not  adjust  tire  pressure when  tire  temperature  is excessive. 
This  could  lead  to  serious tire  damage  and  even cause  the  tire  to 
burst,  with  the  additional  danger  of  an accident. 
 For the  sake  of  the  environment 
Driving  with  under-inflated  tires reduces  fuel  efficiency  and tire 
tread  life. 
[ i] Tips 
•  Each tire  should  be checked  monthly  when  cold  and  set  to  the 
recommended  inflation  pressure  as  specified on  the tire pressure 
table~ 
page 277 . 
• The  tire  pressure  monitoring  system  helps  the driver  to  keep 
track  of  the  tire  pressures . But  the  driver  still  has the  responsibility 
for  maintaining  the  correct  tire pressure. 
•  Tire  pressure  must  only  be adjusted  when  the  temperature  of the 
tires  is  about  the same  as ambient  air  temperature. 
•  When  tires  are  replaced,  the  sensors  and  valves  must  not  be 
detached  or exchanged.  Only  the valve  core  needs  to  be replaced 
and,  if  necessary,  the  valve  and  the  wheel  electronics  replaced. 
•  If  you  should  put  different wheels  and  tires  on  your  vehicle  (e.g. 
winter  wheels  and  tires),  you must  be  certain  that  the  wheels  and 
tires  are  compatible  with  the  tire  pressure  monitoring  system. 
Otherwise  the  system  will  register a malfunction  and  a fault 
message  will be displayed.  For more information,  contact your Audi 
dealer.  .,  

Following  each  intentional  change  in  specified  pressures,  tire  pres
sures  must  be  resaved . 
After  the  pressures  are  saved,  the  tire  pressure  monitoring  system  measures  the  current  tire  pressures  and  saves  them  as the  new 
specified  pressures. 
[ i ] Tips 
•  The  tire  pressure  is shown  on  the  tire  pressure  label.  On  USA 
vehic les, the  tire  pressure  label  is  located  on  the  driver 's side  8-
pillar.  On Canada  vehicles,  the  tire  pressure  label  is located  either  on 
the  driver's  side  8 -pi llar or  insid e the  fuel  filler  flap . The  tire  pressure 
label  lists  the  recommended  cold  tire  inflation  pressures  for  the 
vehicle  at  its  maximum  capacity  weight  and  the  tires  that  were  on 
your  vehicle  at the  time  it was  manufactured . For recommended  tire 
pressures  for  normal  load  conditions , please  see chapter 
=> page  271. 
•  The  tire  pressure  monitoring  system  he lps the  driver  to  keep  an 
eye on  tire  pressures . But  the  driver  st ill  has t he  responsibi lity  for 
maintaining  the  correct  tire  pressure .• 
Contro ls and  eq uip
ment 
Dri ver  informa tio n  di spl ay 
Ap plies  to veh icles : w it h  tir e  pr essure  mo nito ring  syste m 
Changing  a  wheel 
When  you  change  a  wheel,  the  new  tire  must  be initial
ized . 
Fig . 33  Ce nter disp lay : 
t ir e pr essur e se lecte d 
Fi g. 3 4  Center  disp lay : 
W heel c hang e se lecte d 
Activate  and  proceed  through  the  menu  as specified  in 
step  1 above ~ 
page 43, 
select Wheel  change in  the Tire  pres sure menu. 
Programming  is  necessary: 
•  after  rotating  the  wheels  on  the  vehicle, 
•  if  wheels  with  new  wheel  sensors  are  used . 
~ehicle care  Technical data  
![AUDI S4 CABRIOLET 2009  Owners Manual Seats  and  storage 
[ i] Tips 
Some  of  the  controls  are  fitted  on  certain  model s only  or  they  are 
opt ional  equipment. • 
Applies  to  vehic les: w ith  man ually  adjustab le sea ts  AUDI S4 CABRIOLET 2009  Owners Manual Seats  and  storage 
[ i] Tips 
Some  of  the  controls  are  fitted  on  certain  model s only  or  they  are 
opt ional  equipment. • 
Applies  to  vehic les: w ith  man ually  adjustab le sea ts](/manual-img/6/57654/w960_57654-95.png)
Seats  and  storage 
[ i] Tips 
Some  of  the  controls  are  fitted  on  certain  model s only  or  they  are 
opt ional  equipment. • 
Applies  to  vehic les: w ith  man ually  adjustab le sea ts 
Adjusting  the  manual  seats 
Position,  angle  and shape  of the  manual  seats  can  be 
adjusted  to  provide  safe  and  comfortable  seating. 
Reed and  heed  all WARNINGS ~ & before  you  adjust  your 
seat. 
Moving  the  seat  forward  or  backward 
Lift  lever G) ~ page  93,  fig.  104  and  slide  the  seat  to  the 
desired  position. 
- Release the  lever 
(D and  then  move  the  seat further  until 
you  feel  and  hear  it  engage . 
Extending/shortening  the  seat  cushion* 
-Grab  the  handle just  below  the  front  edge of  the  seat® 
~ page  93 , fig.  104. 
- Slide  the  seat  cushion  extens ion  backward  or  forward  to 
the  desired  position.  Release  the  handle  to  lock the 
extension  in  place. 
Adjusting  the  seat  cushion  angle 
- Pull  the  lever 0 ~ page  93, fig. 104  up and  pump  it  to 
raise  the  front  of  the  seat  cushion. 
- Push the  lever 
0 down  and  pump  it  to  lower the  front  of 
the  seat  cushion.  -
In either  case, shift  your  weight  in the  direction  you  want 
the  seat  to  tilt  to  support  the  adjustment  action. 
Adjusting  the  seat  height 
- Pull  the lever © up and  pump  it  to  raise the  seat . 
- Push  the lever © down  and  pump  it  to  lower the  seat. 
Adjusting  the  lumbar  support 
-Press the  corresponding  depression  on  the  switch  shell 
© to  adjust  the  height  and  contour  of  the  lumbar 
support,  see~ page  98. 
Adjusting  the  seatback  angle 
- Lean forward  to  take  your  weight  off  the seatback. 
- Turn  the  hand  wheel © in  the  direction  you  want  the 
seatback  to  ti It. 
& WARNING 
• Never  adjust  the  driver  or front  passenger  seat  while  the 
vehicle  is moving.  If you  do this  while the vehicle  is  moving,  you 
will  be  out  of  position.  Always  adjust  the  driver's  or front 
passenger  seat when  the  vehicle  is not  moving. 
•  Be careful  when  adjusting  the  seat height.  Check to  see that  no 
one  is in the  way,  or  serious injury could result! 
•  To reduce  the  risk  of  injury  in the  case of  sudden  braking  or 
accident,  front  passengers  must  never  ride  in  a  moving  vehicle 
with  the  seatback  reclined.  Safety  belts  and  the  airbag  system 
only offer  maximum  protection  when  the  seatback  is upright and 
the  safety  belts  are properly  positioned  on the  body. The  more the 
seatback  is reclined, the  greater  the risk of personal  injury from  an 
incorrect  seating  position  and  improperly positioned  safety 
belts! •  

________________________________________________ S_e_ a_ ts_ a_ n_d _ s_t _o _r_ a ....; g::. e  _  ___,_ 
The  outlet  may  be  used  for  12-volt appliances  with maximum 
consumption  of up  to  100  watts,  such  as  a flash  light,  small  vacuum 
cleaner,  etc. 
Before  you  purchase  any  accessories,  a lways  read  and  follow  the 
information  in~ 
page  318, "Additional accessories  and  parts 
replacement". 
& WARNING 
The  outlet  plus  any  appliances plugged  into  it  remain  functional 
even  if the  ignition  is switched  off  or the ignition  key is removed. 
Never  leave children  inside  the  vehicle  without  supervision. 
0 Note 
To avoid  damaging  the  socket,  only use plugs  that fit  properly. 
[ i] Tips 
When  the  engine  is  off  and  accessories  are  still  plugged  in  and  are 
on,  the  vehic le  battery  can  still be  drained. • 
Storage 
General 
& WARNING 
•  Always  remove  objects  from  the  instrument  panel.  Any  items 
not  put  away  could  slide  around  inside  the vehicle  while  driving  or 
when  accelerating  or  when  applying  the  brakes  or  when  driving 
around  a corner. 
•  When  you  are  driving  make  sure that  anything  you  may  have 
placed  in  the  center console  or  other  storage  locations cannot fall 
Contro ls and  eq uip
ment 
& WARNING  (continued) 
out  into the  footwells . In  case  of sudden  braking  you would  not  be 
able  to  brake,  depress  the clutch  or  accelerate . 
•  Any pieces of  clothing that you have hung up must  not  interfere 
with  the  driver's  view.  The  coat hooks are designed  only for  light
weight  clothing . Never  hang  any  clothing with  hard , pointed  or 
heavy  objects  in the  pockets  on the  coat hooks . During  sudden 
braking  or  in  an  accident -especially  if the  airbag  is deployed  -
these  objects  could  injure  any  passengers  inside  the  vehicle.  • 
Glove  compartment 
The glove  compartment is  illuminated and  can be  locked. 
To  open  glove  compartment 
Fig. 125  Glove 
compartment 
P ull  the  handle~  fig.  125  in  the direction  of  the arrow 
and  pull  the  lid down. 
To  close  glove  compartment 
Push the glove  compartment  lid upward  until  the  lock 
engages. 
In the  glove  compartment  lid,  you  w ill find  a place  to  store  a pen and 
a  pad  of  paper .  ..,_ 
~ehicle  care  irechnical data  

On  the  road ------------------------------.J 
Keep the  sensors  in  the  rear  bumper  clean  and  free  from  ice so that 
the  acoustic  park  assist  system  can  function  properly. 
& WARNING 
• Sensors have  dead  spaces  in which  objects  cannot  be 
detected . Be especially  alert  for  small  children  and  animals,  since 
they  are  not  always  detected  by the  sensors. 
•  The  acoustic  park  assist  system  is not  a substitute  for  the 
driver's  own  caution  and alertness.  Ultimate  responsibility  always 
remains  with  the  driver  during  parking  and  similar  maneuvers . 
Always  watch  where  you  are  driving. 
0 Note 
•  Remember  that  low  obstacles  for which  a warning  has  already 
been  issued  may  "dive" below  the  system's  sensing  zone  if  the 
vehicle  is  being  backed  up closer. In this  case,  the warning  sound 
shutting  off  does 
not indicate  that  you  have  cleared  the  obstacle . 
Instead,  impact  is  imminent. 
•  Objects  such  as trailer  hitches,  barrier  chains,  narrow  posts  or 
fences  covered  by a  thin layer  of paint  may  not  always  be detected 
by  the  system . They  can  still  damage  your  vehicle  without  a 
warning. 
[  i] Tips 
Keep  the  sensors  in  the  rear bumper  clean  and  free  of snow  and  ice 
so that  the  acoustic  parking  assist  system  can  function properly. • 
Controls  and  equip 
ment 
Cruise  control 
General  information 
The cruise  control  system  allows  you  to maintain  a 
constant  speed. 
The  cruise  control  system  allows  you  to  maintain  a constant  driving 
speed  when  driving  faster  than 18 mph  (30  km/h) -to  the  extent  this 
is  possible  with  the given engine  power  and  braking  characteristics . 
This  allows  you  to take  your  foot  off  the "gas"  and rest  it,  especially 
on  long  trips. 
The  indicator  light  (U.S. models : 
CRUISE , Canadian  models:•(') ) in  the 
instrument  cluster  illuminates  when  the  system is on. 
& WARNING 
• To help  keep  the  vehicle  under  control,  do  not  use the  cruise 
control  system  when  driving  on winding  or slippery  roads  (as 
caused  by heavy  rain  or  loose gravel  on the  road  surface),  or  in 
heavy  or varying  traffic. 
•  Only  use the  cruise  control  when  traffic,  road  and  weather 
conditions  allow  you to  drive  at  a  steady  speed. 
[  i] Tips 
The  cruise  control  cannot  maintain  a constant  speed when  driving 
downhill.  The vehicle  will accelerate  under  its own  weight.  Down
shift  to  a  lower gear  or  use  the  brakes  to  slow  down .•  

___ D_ ri_v _i_n ..::g::;.._ S_ a_ f _e__, ly'---------------------------------------------------
- Alw ay s  place  an d  prop erly  secure  h eavy  items  in  the 
luggage  com partm en t  as fa r fo rwa rd as  possi ble. 
& WARNING 
Improperly  stored  luggage  or  other  items  can  fly  through  the 
vehicle  causing  ser ious  personal  injury  in  the  event  of  hard  br aking 
or  an  a ccident.  To help  reduce  the  risk  of  serious  personal  injury : 
•  Always  put  objects , for  e xample , luggage  or  other  heavy  items 
in  the  luggage  compartment. 
& WARNING 
Heavy  loads  will  influence  the  way  your  vehicle  handles.  To help 
reduce  the  risk  of  a  loss  of  control  leading  to  serious  personal 
injury : 
•  Always  keep  in  mind  when  transporting  heavy  objects , that  a 
change in the  center  of  gravity  can also cause changes in vehicle 
handling: 
-Always  distribute  the  load  as  e venly  as  possible . 
- Place  heavy  objects  as  far  forward  in  the  luggage  compart -
ment  as  possible . 
•  Never  exceed  the  Gross  Axle  Weight  Rating  or  the  Gros s 
Vehicle  Weight  Rating  specified  on  the  safety  compliance  sti cker 
on  the  left  door  jamb.  Exceeding  permis sible  weight  standards 
c an  cau se the  veh icle to  slide  and  handle  differently . 
•  Please  ob serve  information  on  safe  driving:::::, 
page 146. 
& WARNING 
To help  prevent  poisonous  exhaust  gas  from  being  dra wn  into  the 
vehicle , always  keep  the  rear  l id  clo sed  while  driv ing. 
•  Ne ver  t ransport  obje cts  larger  than  those  fitting  completely 
into  the  luggage  area  because  the  rear  lid  cannot  be  fully  closed. 
& W ARNING  (continued ) 
•  If you  absolutely  must  drive  with  the  rear  lid  open,  observe  the 
following  notes  to  reduce  the  risk  of  poisoning : 
- Close  all  windows , 
- Close  the  power  top , 
- Open  all  air  outlets  in  the  instrument  panel , 
- Switch  off  the  air  recirculation , 
- Set  the  fre sh  air  fan  to  the  highest  speed . 
& WARNING 
Always  make  sure  that  the  doors,  all  windows , the  power  roof  and 
the  rear  lid  are  securely  closed  and  locked  to  reduce  the  ri sk  of 
injury  when  the  vehicle  is  not  being  used. 
•  After  closing  the  rear  lid , always  make  sure  that  it  i s properly 
closed and locked . 
•  Never  leave  your  vehicle  unattended  especially  with  the  rear  lid 
left  open.  A child  could  crawl  into  the  vehicle  through  the  luggage 
compartment  and  close  the  rear  lid  becoming  trapped  and  unable 
to  get  out . Being  trapped  in  a vehi cle  can  le ad  to  serious  personal 
injury. 
•  Never  let  ch ildren  play  in  or  around  the  vehicle. 
•  Never  let  pa ssengers  ride  in  the  luggage  compartment . Vehicle 
occupants  must  always  be  properly  restrained  in  one  of  the 
vehicle's  seating  po sition s. 
[ i ] Tips 
•  Air  circu lat io n  helps  to  reduce  window  fogg in g  when  the  power 
top  is  c losed.  Stale  air  escapes  to  the  outside  through  slots  in  the 
t rim  pa nels  o n both  sides  of the  luggage  co mpartment.  Make  sure 
that  these  s lots  are  not  b locked.  _.  

___ A_ ir_b _ a_ g~ s_ y_s _t _e _m _________________________________________________  _ 
Child  restraints  on  the  front  seat  - some 
important  things  to  know 
- Be sure to read  the  important  information  and  head  the 
WARNINGS  for important  details about children  and 
Advanced  Airbags~ 
page  190. 
Even though  your  vehic le is equipped  with  an  Advanced  Airbag 
System,  make  certain  that  a ll children,  especia lly those  12 years  and 
younger,  a lways  ride  in the  back  seat  properly  restrained for their 
age and  size . The airbag  on the  passenger  side  makes  the  front  seat 
a potentia lly dangerous  place  for a child  to  ride.  The front  seat  is not 
the  safest  p lace for  a chi ld  in  a forward -facing  child  safety  seat.  It 
can  be a very  dangerous  place for an  infant  or  a child  in a rearward 
facing  seat. 
The  Advanced  Airbag  System  in  your  vehicle  has  been  certified  to 
comply  with  the  Requirements  of  United  States  Federal  Motor 
Vehicle  Safety  Standard  208 as applicab le  at the  time  your  vehicle 
was  manufactured. 
Th e Standard  requires  the front  airbag  on  the  passenger  side  to  be 
turned  off ("suppressed")  if a chi ld up  to  about  one year  of  age 
restrained  in  one  of  the  rear-facing  or  forward-facing  infant 
restraints  listed  in  Federa l Motor  Vehicle  Safety  Standard  208 with 
which  the  Advanced  Airbag  System  in your  vehicle  was  certified  has  been  instal led on  the  front  passenger  seat.  For a listing  of  the  child 
restraints  that  were  used  to  certify  compliance  with  the  US Safety 
Standard => 
page 192. 
The PASSENGER  AIR  BAG  OFF light  in  the  instrument  panel tells you 
when  the  front  Advanced  Airbag  on  the  passenger  side  has  been 
t urned  off  by the  electronic  control  unit. 
Each  time  you  turn  on  the  ignition,  the 
PASSENGER  AIR BAG  OFF 
light will  come  on  for  a few  seconds  and: 
•  will stay  on  if  the front  passenger  seat  is  not  occupied, • 
will  stay  on  if there  is a small  child  or  child  restraint  on  the  front 
passenger  seat, 
•  will  go  off  if  the  front  passenger  seat  is occupied  by an  adult  as 
registered  by the  weight-sensing mat=> 
page 179, "Monitoring  the 
Advanced  Airbag  System" . 
The 
PASSENGER  AIR  BAG OFF light  comes  on  when  the  control  unit 
detects  a tota l weight  on  the front  passenger  seat  that  requires  the 
front  airbag  to  be turned  off. 
If  the  total  weight  on  the  front  passenger  seat  is more than  that  of 
a typical  1 year -old  child  but  less  than  the  weight  of  a small  adult, 
the  fron t airbag  on  the  passenger side  can deploy (the 
PASSENGER 
AIR  BAG  OFF 
light does  not  come  on).  If  the PASSENGER  AIR  BAG 
OFF 
light  does  not  come  on,  the front  airbag  on  the passenger  s ide 
has  not  been  turned  off  by the  electronic  contro l unit  and  can 
deploy  if  the  control  unit senses  an  impact  that meets  the  condi 
tions  stored  in  its memory. 
For example,  the airbag  may  deploy  if: 
• a small  ch ild that  is  heavier  than  a typical  1 year-o ld  child  is  on 
the  front  passenger  seat  (regardless  of  whether  the  child  is  in  one 
of  the  child  safety  seats  listed => 
page 192), or 
•  a child  who  has  outgrown  chi ld  restraints  is on  the  front 
passenger  seat . 
If  the  front  passenger  airbag  is turned off,  the 
PASSENGER  AIR  BAG 
OFF 
light  comes  on  in  the  instrument  cluster  and  stays  on. 
The  front  airbag  on  the passenger  side  may 
not deploy  (the 
PASSENGER  AIR BAG OFF light  does  not  illuminate  and  stay  lit) even 
if  a small  adult  or teenager,  or  a passenger  who  is  not sitting  upright 
with  their  back against  a non -reclined  backrest  with  their  feet  on the 
vehicle  floor  in front  of  the seat  is on  the  front  passenger  seat 
=> 
page 148, "Proper  seating  position  for  the  driver". 
If  the  front  passenger  airbag  deploys,  the  Federal  Standard  requires 
the  airbag  to  meet the  "low  risk"  deployment criteria to reduce  the 
risk  of  injury  through interaction  with  the  airbag.  "Low  risk"  deploy
ment  occurs  in those  crashes  that  take  p lace at  lower  decelerations  .,.