2009 AUDI A4 CABRIOLET ESP

___ C_h _i_ ld _ S_a _f _e _t _y ____________________________________________ _
& WARNING
Not using a child safety seat, using the wrong child safety seat or
improperly installing a child restraint increases the risk of serious
personal injury and death.
• All vehicle occupants and especially children must always be
restrained properly whenever riding in a vehicle .
- An unrestrained or improperly restrained child can be injured or killed by being thrown against the inside of the vehicle or by
being ejected from it during a sudden maneuver or impact.
- An unrestrained or improperly restrained child is at much
greater risk of injury or death by being struck by an inflating
airbag.
• Commercially available child safety seats are required to
comply with U .S. Federal Motor Vehicle Safety Standard (FMVSSI
213 (in Canada CMVSS 2131.
-When buying a child restraint , select one that fits your child
and the vehicle.
- Only use child restraint systems that fully contact the flat
portion of the seat cushion . The child restraint must not tip or
lean to either side . Audi does not recommend using child safety
seats that rest on legs or tube-like frames. They do not provide
adequate contact with the seat .
- Always heed all legal requirements pertaining to the installa ­
tion and use of child safety seats and carefully follow the
instructions provided by the manufacturer of the seat you are
using .
• Never allow children under 57 inches (1 .5 meters) to wear a
normal safety belt. They must always be restrained by a proper
child restraint system. Otherwise, they could sustain injuries to
the abdomen and neck areas during sudden braking maneuvers or
accidents.
• Never let more than one child occupy a child safety seat .
& WARNING (continued)
• Never let babies or older children ride in a vehicle while sitting
on the lap of another passenger.
- Holding a child in your arms is never a substitute for a child
restraint system .
- The strongest person could not hold the child with the forces
that exist in an accident. The child will strike the interior of the
vehicle and can also be struck by the passenger.
- The child and the passenger can also injure each another in
an accident.
• Never install rear-facing child safety seats or infant carriers on
the front passenger seat. A child will be seriously injured and can be killed when the passenger airbag inflates - even with an
Advanced Airbag System.
• The inflating airbag will hit the child safety seat or infant
carrier with great force and will smash the child safety seat and
child against the backrest, center arm rest, door or roof .
• Always install rear -facing child safety seats or infant carriers on
the rear seat .
• Forward-facing child safety seats installed on the front
passenger's seat can interfere with the airbag when it inflates and
cause serious injury to the child . Always install forward -facing
child safety seats on the rear seat.
• If exceptional circumstances require the use of a forward ­
facing child restraint on the front passenger's seat, the child's
safety and well -being require that the following special precau ­
tions be taken :
- Make sure the forward -facing seat has been designed and
certified by its manufacturer for use on a front seat with a
passenger front and side airbag.
- Always carefully follow the manufacturer 's instructions
provided with the child safety seat or carrier .

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Booster seats
Properly used booster seats can help protect children
weighing between about 40 lbs . and 80 lbs. (18 kg and 36
kg) who are less than
4 ft. 9 in. tall.
Fig . 181 Rear seat:
child properly
restrained
in a booster
seat
The vehicle's safety belts alone will not fit most children
until they are at least 4 ft. 9 in. tall and weigh about 80 lbs.
(36 kg). Booster seats raise these children up so that the
safety belt will pass properly over the stronger parts of their
bodies and the safety belt can help protect them in a crash.
- Do not use the convertible locking retractor when using
the vehicle's safety belt to restrain a child on a booster
seat.
- Always position the shoulder portion of the safety belt
midway over the child's shoulder.
- Always make sure that the shoulder portion of the safety belt never rests against or across the child's neck.
- Always make sure that the child can properly wear the lap portion of the belt low across the thighs or pelvis and
never over the stomach or abdomen .
Children up to about 40 lbs (18 kg) are best protected in child safety
seats designed for their age and weight. Experts say that the skel ­
etal structure, particularly the pelvis, of these children is not fully
developed, and they should not use the vehicle safety belts
=> page 1981 fig . 181.
Children who weigh more than 40 lbs. (18 kg) may generally use the
available three point combination lap and shoulder belts when they
sit on an appropriate booster seat . Be sure the booster seat meets
all applicable safety standards .
Booster seats raise the seating position of the child and reposition
both the lap and shoulder parts of the safety belt so that they pass
across the child's body in the right places. The routing of the belt
over the child's body is very important for the child's protection.
This applies whenever a child uses the vehicle's safety belts, even
when the child is big enough to use them without a booster seat. Children age 12 and under should
always ride in the rear seat.
Children should not ride in the front seat unless no other seating
position is available because crash statistics show that children are
better protected in the rear seat.
In a crash, airbags must inflate within a blink of an eye and with
considerable force . In order to do its job, the airbag needs room to
inflate so that it will be there to protect the occupant as the occu ­
pant moves forward into the airbag.
A vehicle occupant including a child who is out of position and too close to the airbag gets in the way of an inflating airbag. When an
occupant is too close, he or she will be struck violently and will
receive serious or possibly even fatal injury .
In order for the airbag to offer protection, it is important that all
vehicle occupants, especially any children, who must be in the front
seat in exceptional circumstances, be properly restrained and as far
away from the airbag as possible. By keeping room between the
child's or other occupant's body and the front of the passenger
compartment, the airbag can inflate fully and completely and
provide supplemental protection in certain frontal crashes . ._

___ C_h_ i_ld _ S_ a_ f_ e_ t_ y ______________________________________________ _
child is available. In these exceptional situations, the use of a lap
belt is better than permitting the chi ld to remain totally unre ­
strained . But remember: a lap belt cannot provide the same level of
protec tion as a proper child restraint or a t hree -point lap and
shoulder belt if the child is big enough . Also, using a lap belt for
younger child ren, who should be using a chi ld restraint, may violate
l aws in your state or Prov ince .
Never use a lap belt alone to restrain a chi ld that weighs less than
about 80 lbs (36 kg) and who is less than 4'9" ta ll. A lways remember
that chi ldren do not have the pronounced pelvic structure required
for the proper function of lap belts. If a lap belt is only restraint
system available, then the child's safety absolutely requires that the
l ap be lt be fastened snug ly and as low as possible around the pelv is
let a lap belt pass over the chi ld's stomach or abdomen .
& WARNING
Using wrong child restraints or improperly in stalled child
restraint s can cau se serious personal inju ry or death in a cr ash.
• Fa ilure to properl y route safety belts over a child's body will
c au se severe injurie s in a crash . The lap belt portion of the three
point belt a s well a s any l ap belt alone mu st al way s pass as low as
po ssible acros s the pelvi s, never over the stom ach or abdomen.
• An improperl y worn saf ety belt will not pr ovide the best prote c­
tion in a cra sh and may cau se ser iou s personal injury . Alwa ys
m ake sure that childr en and other vehicle occ upant s properl y
wear available restraint sy ste m s. Carefully follow the in struction s
pro vided by the manuf acturer s of child re strai nts. •
Installing a child safety seat
Securing a child safety seat using a safety
belt
Safe ty belts for the rear seats and the fr ont passenger can
be locked with the c onvertible locking retractor to prop­
erly secure child safety seats.
The safety belts emergency locking retractors fo r the rear seats
safety be lts and for the front passenger's seat safety belt have a
conve rtible locking ret ractor for child restraints . The safety belt
must be locked so that belt webbing cannot unreel. The retractor
can be activated to lock the safety be lt and prevent the safety belt
webbing from loosening up during normal dr iving. A child safety
seat can only be properly instal led when the safety belt is locked so
that t he child and child safety seat w ill s tay i n place .
Always remember: Even though your vehicle is equipped with an
Advanced Airbag system, al l children, especially those 12 years and
younger, should always ride in the back seat p roperly restra ined for
their age and size.
& WARNING
Improperly in stalled child safety seat s increa se the risk of s erious
per sonal inju ry a nd death in a colli sion .
• Alway s m ake sure that the safe ty belt retrac tor is locked wh en
i nstalling a child safety seat . An unl ocked safety be lt retra ctor
cannot hold the ch ild safety seat in pla ce during normal driv ing or
in a cras h.
• Alway s buckle the child safety seat firml y in place even if a
c hild i s not sitting in it. A loo se child safet y seat can fl y around
during a sudden stop or in a coll ision
• If the b ackre st i s not se cu rely l atched , the ch ild and the ch ild
restraint will be thrown forward together with the bac krest and .,

___ C_h_ i_ld _ S_ a_ f_ e_ t_ y ______________________________________________ _
& WARNING (continued)
• A child in a rearward-facing child safety seat installed on the
front passenger seat will be seriously injured and can be killed if
the front airbag inflates -even with an Advanced Airbag System.
• The inflating airbag will hit the child safety seat or infant
carrier with great force and will smash the child safety seat and
child against the backrest, center arm rest, door or roof.
• Always be especially careful if you must install a rearward
facing child safety seat on the front passenger seat in exceptional
circumstances.
• A tight tether strap on a rearward-facing child restraint
attached to the front passenger seat can put too much pressure
on the weight -mat in the seat and register a heavier weight in the
Advanced Airbag System. The heavier weight registered can make
the system work as 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, immediately 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 secure a child
restraint.
Always heed the child safety seat manufacturer's instruc­
tions when installing a child restraint in your vehicle. To
activate the convertible locking retractor:
- Place the child restraint on a seat, preferably on the rear
seat. -
Slowly pull the belt
all the way out.
- Route it around or through the child restraint 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 convertible locking
retractor is now act ivated .
- Make sure that the red release button is facing 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 seat cannot move forward
or sideways more than one inch (2.5 cm).
& WARNING
Using the wrong child restraint or an improperly installed child
restraint can cause serious personal injury or death in a crash.
• Always make sure that the safety belt retractor is locked when
installing a child safety seat. An unlocked safety belt retractor
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.

_______________________________________________ C_h _i_ld _ S_ a_ f_ e_ t...: Y _ _____.1!1111
Installing the guidance fixtures
- Push down on the seat cushion so that the lower anchor ­
ages are visible.
- Hold the guidance fixture with the part number facing downward and push it in the direction of the arrow onto
the anchorage :::::, fig. 187.
- Make sure that each of the two guidance fixtures per seat
snaps into place.
Removing the guidance fixtures
- Remove the child restraint according the child restraint
manufacturer's instructions.
- Push down on the seat cushion so that the lower anchor ­
ages are visible.
- Pull off the guidance fixtures from the lower anchorages.
- Always remove the guidance fixtures and keep them in a
safe place when not in use.
You may find it easier to install child restraints equipped with hooks
attached to straps without the guidance fixtures in place. If this is
the case, remove the guidance fixtures by pulling them off the
anchorages . However, the guidance fixtures can help you to locate
the
LATCH anchorages.
& WARNING
Improper use of tether anchorages or lower anchorages can cause
serious personal injury in a crash.
• Always carefully follow the child restraint manufacturer's
instructions for proper installation and use of child restraint
systems.
Controls and equip­ ment Safety first Vehicle operation
& WARNING (continued)
•
Never use the LATCH or tether anchorages to attach safety
belts or other kinds of occupant restraints.
• Child restraint tether attachments and lower attachments are
only designed to secure a child restraint that has been equipped
to use these anchorages.
• Tether anchorages and lower anchorages are designed to with­
stand only those loads imposed by correctly fitted child restraints.
Under no circumstances can they be used safely for adult or child
safety belts or harnesses.
• Never mount more than one child restraint to a single tether or
to a lower anchorage point. Attaching two child restraints to a
single anchorage point can cause the anchorage to fail and cause
serious personal injury in a crash.
0 Note
If you leave the guidance fixtures installed for several days, they
could leave a mark on the upholstery on the seat cushion and back­
rest in the area that the guidance fixtures were installed. The uphol ­
stery would also be permanently stretched around the guidance
fixtures. This applies especially to leather seats.
[ i] Tips
• Always remove the guidance fixtures when not in use.
• Please keep the guidance fixtures in a safe place with the vehicle
when not in use .•
Vehicle care Do-it-yourself service Technical data

-In
te llig ent tec hnolo gy --=---=-=-------------
Intelligent technology
Notice about data recorded by
vehicle control modules
Your vehicle is not equipped with an Event Data Recorder (EDRl,
installed by some manufacturers for the express purpose of
capturing data for retrieval after an accident or crash event . EDR's
are sometimes called "crash recorders" .
Some state laws restrict the retrieva l or downloading of data stored
by EDR's that were insta lled 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 electronic control modules for various vehicle systems such as, for examp le, engine function, emission control, as
we ll as for the airbags and safety belts.
T hese electronic control modules also record vehic le-rela ted da ta
during norma l ve hicle operation for diagnost ic and repair purposes .
The recording capacity of the electronic control modules is limited
to data (no sound is recorded) and only a small amount of data is
actually 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 vehic le speed, d irection,
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
down loaded with special equipment. •
Electronic Stabilization Program (ESP)
General information
The ESP improves the vehicle s tability.
I
A F ig . 19 0 Cen ter
co nsol e w ith ESP
sw itch
ESP is designed to he lp you maintain vehic le control in situa tions
where the car approaches the limits of "grip", especially when acce lerating and cornering . ESP reduces the risk of skidding and
improves stability under all road conditions .
The syst em opera tes across the en tire speed range in combination
with the ABS system. If the Anti-Lock Brake System (ABS) malfunc ­
tions, the ESP wil l a lso shut down .
How th e sys te m work s
The Anti-Lock Brake System (ABS) , E lectronic Differential Lock (EDU
and the Anti -Sl ip Regu lation System (ASR) are integrated in the e lec­
tronic stabi li z ation program. In addition to the data provided by
these functions, the ESP control unit requires additional measure­ ment data provided by high performance sensors . T he rotational
speed of the vehic le about its ver tica l axis, t he late ral acce leration
acting on the vehic le, the brake pressure and the steering ang le are
a ll measured .

The direction in which the driver wishes to travel is determined with
the aid of the steering angle and vehicle speed and is continua lly
compared with the actual behavior of the vehicle. If the two do not
match, -for example, when the vehicle starts hydrop laning on a
wet road -, ESP will automatical ly brake the appropriate wheel to
correct the problem.
The veh icle is then stabi lized by the forces act ing on the whee l
during braking. If the vehicle is oversteering (rear tends to skid out
of the turn), the brakes are mainly app lied on the whee l that is on
the outside of the curve. In the case of a vehicle that is understeering
(tendency to s lide out of the curve), the brakes are applied at the
rear wheel that is on the inside of the curve . An acoustic signal indi­
cates when ESP brake application cuts in =>
&.
The system operates across the entire speed range in combinat ion
with the ABS system => page 216 . If the Anti -Lock Brake System
(ABS) malfunctions, the ESP wi ll be out of act ion as well.
Activa tion
When you turn on the engine, ESP w ill automatica lly be activated
and will perform a self -test .
The system can be activated o r deactivated by pressing the butto n
=> page 212, fig . 190 . The warning light comes on when the system
is switched off .
Normally, the ESP should a lways be on, however, it may be advanta­
geous to turn off the system in certain specia l cases when some
degree o f wheel spin is desired such as :
• when driving with snow chains
• when driving in deep snow or on a loose surface (to allow the
whee ls to dig in to reach firm ground)
• when trying to "rock" the vehicle free whe n it has become stuck .
The system shou ld be reactivated once you are no longer in such
situations.
Both , the ABS and EDL systems are still functioning even if the ESP
is switched off .
Controls and equip­
ment Safety first Vehicle operation
Int
ellig ent tec hnol ogy
& WARNING
The Ele ctron ic Stab ilization Program is neve rth ele ss s ubje ct to th e
law s of phy sic s. It is p art icularly important to pay at tent ion to thi s
f ac t on wet and slipper y ro ad s. It i s therefore important th at yo u
alway s adapt your driving to the condition of the road and traffic
c onditio ns. Do not allo w the in crea sed safety prov ided by t he Ele c­
tronic Stabilization Program sy stem to lull you into a ccepting
addition al safety ri sk s.
• Plea se note that when ESP i s deactivated , the drive wheel s can
s pin on icy and slippery ro ads a nd the vehi cle can break away -
d anger of skidding ! C
E lectronic differential lock CEDL)
The electronic differential lock monitors the rotational
speed of the drive wheels.
Gener al notes
The electronic differential lock (EDU helps the car to start moving,
accelerate and c limb a gradien t on surfaces providing poor or
a lmost no grip . Without EDL, this would be difficult , if not impos ­
sible.
How the syst em works
The EDL operates automat ical ly . It monito rs the rotationa l speed of
the drive whee ls on an axle with the he lp of the ABS sensors
=> page 216 . If a noticeable difference in rotational speed between
the drive wheels on one axle is de tected (e.g. on slippery grou nd on
one side), the spinning wheel is braked, thereby transferring power
to the other drive wheel or wheels (a ll -whee l drive) . This is done up
to a speed of about 60 mph ( 100 km/h). Noises from the brake
system signal that wheel spin is being control led.
~
Vehicle care Do-it-yourself service Technical data

___ ln_ te_ ll..,,ig ..,_ e_ n_t _t_ e_ c_ h _ n_o _ l_o _,.g= y,_ __________________________________________ _
Driving off
When driving off, always be sure to keep road conditions in mind as
you accelerate. If one drive wheel spins because it is on a surface
with less grip, gradually increase the pressure on the accelerator
pedal until the car starts to move. The wheel less able to transfer
power spins.
Overheating of brakes
To prevent the disc brake of the braked wheel from overheating if
subjected to excessive loads, the EDL cuts out temporarily. The
vehicle remains operational and behaves in the same way as a
vehicle without EDL.
As soon as the brake has cooled down, EDL switches on again auto­ matically.
& WARNING
• When accelerating on slippery surfaces, such as on ice or snow,
always be careful when depressing the accelerator pedal. Even
with the EDL working, the drive wheels can spin and reduce your ability to control your car. -Risk of crash!
• The increased safety afforded by EDL does not mean that you
can take safety risks. Always adapt your driving style to the road
conditions and traffic situation.
[ i] Tips
If a fault occurs in the ABS, the EDL is also not functioning. This is
indicated by the ABS warning light=>
page 20. •
Anti-Slip Regulation System (ASR)
The Anti-Slip Regulation System prevents the driven
wheels from spinning when the car is accelerating.
General notes
The Anti-Slip Regulation System (ASR) is integrated in the electronic
stabilization program (ESP). When the vehicle starts up and acceler­
ates, the wheels are prevented from spinning by adjusting the
engine power to match the amount of grip available from the road
surface.
How the system works
ASR performs automatically, i.e. without the driver's intervention.
With the aid of the ABS sensors=>
page 276, ASR monitors the
speed of the driven wheels. If the wheels start to spin, the engine
power is reduced automatically until the tires find enough grip to
lock onto the road surface. The system is active across the entire
speed range.
Th e ASR works in conjunction with the ABS. If a malfunction should
occur in the ABS, the ASR will also be out of action.
& WARNING
The increased safety afforded by ASR does not mean that you can
take safety risks. Always adapt your driving style to the road
conditions and traffic situation.
[ i] Tips
To ensure that the ASR works properly, all four wheels must be fitted
with identical tires Any differences in rolling radius of the tires can
cause the system to reduce engine power when this is not desired.
S ee also =>
page 279, "New tires and replacing tires and wheels". •