AUDI A4 CABRIOLET 2009 Workshop Manual

Master key battery replacement
Each master key contains a battery housed under the
cover.
Fig. 39 Master key:
opening the cover
We recommend having the battery changed by an autho­
rized dealership. However, if you wish to replace the dead
battery yourself, proceed as follows:
- Pry apart the base=> fig. 39
@ and the cover @carefully
with a coin.
- Remove the cover (arrow).
- Remove the dead battery from the cover.
- Install the new battery. Please make certain that the"+"
sign on the battery faces down. Correct polarity is shown
on the cover.
- Place the cover with the new battery on the key base and
press both parts together.
W For the sake of the environment
Dispose of dead batteries properly so as not to pollute the environ ­
ment.
Contro ls and eq uip­
ment
Opening and closing
[ i] Tips
The replacement battery must be the same specification as the
original. •
Electronic immobilizer
The immobilizer helps to prevent unauthorized use of
your vehicle.
A computer chip inside your key automatically deactivates the elec­
tronic immobilizer when you insert the key in the ignition lock.
When you remove the key from the ignition lock, the electronic
immobilizer is automatically activated once again.
If an unauthorized key was used,
SAFE is displayed continuously in
the odometer display field.
in. WARNING
Always take the key with you when you leave the vehicle. The key
can disarm the electronic engine immobilizer and permit an unau­
thorized person to start the engine and enable operation of the
vehicle systems such as power window or power top leading to
serious personal injury.
[ i] Tips
• Your engine can only be started using the factory -equipped key.
• You may not be able to start your vehicle if an ignition key of a
different vehicle make is also located on your set of keys.
• For Declaration of Compliance to United States FCC and Industry
Canada regulations
~ page 320. •
~ehicle care irechnical data

Openin g and clo sin g
Power locking system
General description
The power Jocking system Jocks all the vehicle doors and
rear lid simultaneously or allows you to unl ock either just
the driver's door or all the vehicle doors and rear lid
simultaneously.
The power locking system in your veh icle incorporates the following
f unctions:
• Central locking function
• Remote contro l feature~
page 51.
• Anti -theft alarm system ~ page 57 .
All the doors and the rear lid are locked by the central locking
system when you lock the vehicle .
Unlo cking th e vehicle
You can unlock the vehicle from outside either by using the remote contro l
or by inserting and turning the key in the driver's door lock.
When you
unlo ck your vehic le:
• The anti-theft alarm sys tem is deact ivated briefly.
• The vehicle interior lights i lluminate for approximately 30
seconds.
• All turn signal lights will flash twice when the car is un locked.
• After un locking the vehicle, you have 60 seconds to open a door
or the rear lid. After 60 seconds, t he vehicle automatically locks and
the anti-theft a larm system activates again .
T he rear lid can be locked or unlocked either by using the remote
co ntro l
or by inserti ng and turning the key in the driver's door lock .
Un locking the vehicle with the remote control will only
unlock the
r ear lid, to
open it, the lid handle needs to be pressed . Lo
cking th e veh icle
You can lock the vehic le from outside e ither by using the remote
control
or by inserting and turning the key in the drivers's door lock .
When you
lock the vehicle:
• All doors and t he rear lid are locked .
• All turn signal lights w ill flash once when the ca r is locked.
• The anti -theft alarm system is activated . The horn of the anti ­
theft alarm sys tem will sound and the anti -t heft ala rm sys tem readi ­
ness l ight, located in the upper par t of the driver's door panel , wi ll
start to blink.
• The vehicle interior lights turn off .
Automatic locking*
The automat ic locking feature locks all the vehicle doors and the
rear lid when you drive faster than 9 mph (15 km/h).
You can unlock the vehicle from the inside by:
• removing the key from the ignition switch (the vehicle wil l auto ­
matically u nlock itself) or
• pressing the unlock pa rt of the power lock switch €:Dor
pulling the door handle (twice to open the door) .
If you wish, you can have an authorized Audi dea ler convert your
powe r door lock sys tem to automatic locking.
& WARNING
• When you lock your vehic le from out side , nobody -especially
c h ildren - should remain in side the vehicle . Remembe r, when you
lo ck the vehicle from the out side the windows cannot be opened
from the in side .
• When you leave the vehicle , alway s remove the ignition key and
take it with you . Thi s w ill prev ent pa ssenger s (children , fo r
example) from ac cidentally being locked in the vehicle should they
ac cidentally pre ss the power locki ng swit ch in the front door s. .,

& WARNING (co ntin u ed)
• Do n ot l ea ve c hildr en i ns ide th e vehicle un sup erv is ed. In an
e m erg en cy it w ould be impo ssible to op en the door s from the
out side without the key.
[ i ] Tip s
• In the event of a crash with airbag deployment all locked doors
wi ll be automat ically unlocked to give access to the vehicle occu­
pants from the outside.
• If the power locking system should fail, you can st ill open the
fue l tank flap in an emergency~
page 248.
• You are we ll advised not to keep va luables inside an unattended
vehic le, visible or not. Even a properly locked vehicle cannot provide
the security of a safe! •
Keyless entry remote control
General description
The remote controls allows you to:
• lock or un lock the vehicle
• selective ly un lock the rear lid.
The turn signals wi ll flash briefly whenever you lock or unlock the
vehic le . Also, the interior light will come on or go off whenever you
open or c lose the driver's door.
The transmitter and battery are located in the head of the remote
control. The receiver is located inside the vehicle. The maximum
effective range depends on severa l things. Remember, if the battery
is weak, the effective range decreases .
The remote -control key contains a fo ld-ou t key that you can use to
manual ly lock or unlock the vehicle and to start the engine .
Controls and eq uip­
ment
Op enin g and clo sing
If you need to replace the remote control, or if you need to have it
repaired, you must see your authorized Audi dealer. Only then can
you use the key again. •
Unlocking and locking the vehicle with the
remote control
How the remote control works.
To unlock the v ehicle m
- Press button @.
Fig. 40 Remo te
co ntr ol: fu nctio n
b utt ons
- Press button @two times within two seconds to unlock
all doors and the rear lid .
To lock the vehicle [II
-Press bu tton @ => &, in "Gener al descri ption" on
page 50.
- Watch that all turn signal lights flash once.
To unlo ck r ear lid only ,c::;
- Press button @for approx imate ly one second.
~ehicle care Technical data

Opening and clos ing
PANIC Button
- Push the red button@to activate the panic function. The
horn sounds and the turn signals flash.
- Push the button® again to deactivate the panic f unc­
tion.
& WARNING
R ead a nd fo llo w all W ARNING S => & in "Ge nera l desc ription " on
page 50.
[ i ] Tips
• In order to make sure the locking function is working, you should
always keep your eye on the vehicle to make sure it is properly
locked.
• Do not use the remote control if you are inside the car, otherwise
you may unintentionally lock the vehic le, and then you would set off
the anti-theft alarm when you try to start the engine or open a door.
In case this happens anyhow, push the unlock button@.
• Use the panic function only if you are in an emergency
situation .•
R ese tting the remote control
The remote c ontr ol must be reset if the vehicle does not
unlock .
0
Fig . 4 1 Ign itio n l ock
p os it ions
- If the ve hicle is locked, o pen the driver's door with the
mechanical key i n your remote con tro l.
- Press the unlock button
III on the remote control.
- Insert the key into the ign ition lock
CD => fig. 4 1 and turn
it to position
0 to turn the ignition on .
Turn the key back to position
CD to t urn the ig nition off
agai n.
- Pu ll the key out of t he ig nition loc k.
- Press e it her the lock-1'.D or the unlock
III button to
com plete the reset sequence .
0 Note
Do not turn the key to position 0 for resetting as this will start the
engine and may put the car in motion .•

Doors, power locks
Operating locks vvith the key
To lock and unlock the vehicle from the outside, turn the
key in the lock of the driver's door.
To unlock the driver's door only
Fig . 42 Key turns for
opening and closing.
- Insert the key into the lock of driver's door.
- Turn the key
one time only to pos ition @=>fig. 42 to
unlock the driver's door .
To unlock all doors and the rear lid Turn the key
two times to pos ition @=> fig. 42 to unlock
the veh icle
To lock the vehicle - Close all windows and doors properly.
- Turn the key in the lock of the driver's door to the lock position
@ ~ & in "General descript ion" on page 50.
Contro ls and eq uip­
ment
Opening and closing
& WARNING
Always read and heed WARNING~ & in "General description" on
page 50. •
Convenience close /open feature vvith the
lock in the driver 's door
You can close or open the windows and the power top
from outside when you lock or unlock your car with the
key.
Closing the windows
- Insert the key into the lock of the driver's door.
- Make sure that the windows are not blocked~& .
- Turn and hold the key in the lock position @=>fig. 42
until the w indows are completely closed.
Opening the windows
- Press button @ on the key
twice to unlock the car.
- Insert the key into the lock of the driver's door .
- Turn and hold the key in the open position @.
Opening/closing power top
- See =>
page 63, "Convenience opening and closing of
power top" to operate power top with the key.
The automatic close function will cease if the key is released. For
safety reasons it is not possible to open and close the power top
with the remote control key . ..,
~ehicle care Technical data

Opening and closing
& WARNING
• Be careful when closing the window s. Check to see that no one
is in the way, or serious injury could result !
• Always read and heed WARNING~
& in "General des cript ion "
on
page 50. •
Locking and unlocking the vehicle from inside
T he vehicle can be l oc ke d or unlocked from the insid e
usin g th e pow er lock in g switches lo ca te d in t he driver's
a nd the f ront pas senger d oor.
t----~~~....,.~--,.,:,,....,...,..,.~..,...,. ..... ...,..,.._,......,...,......., ij
i
Fig . 4 3 Driv er's door:
po wer lo cking sw it c h
How to lock all doors and the rear lid
simultaneously
Press l ower part o f the po wer loc kin g s witch
IJt,,=
=> fig . 43 => & .
How to unlock all doors and the rear lid
simultaneously
- Press the uppe r part o f the switch
How to unlock each door separately using the
door handle
- Pull the handle to o pen th e do or.
If you loc k the vehicle us ing the power lo cking switch c»= , please
no te the foll owi ng:
• You cannot open the doors or the rear lid from the
outside
!increased security, for example when you are stopped at a red
li g ht).
• The diode i n the powe r loc king switch ill uminate whe n all the
doors and the rear lid are c losed and loc ke d .
• You ca n unl ock and o pe n t he d oors from the in side by pull ing o n
t h e door ha ndle.
• I f th e driver's door is opened (a fter you have locke d the ve hicle
from the inside using the power locking switch), the door will
rema in unlocke d to prevent you from locki ng y ourse lf out o f yo ur
veh ic le. Aft er you c lose t he door, you have to lock the d river 's doo r
agai n.
• I f you have an accident and the airbag is activated, the doors
u nl ock au tomaticall y.
& WARNING
• If you use the power locking switch with the doors closed ,
remember that all the vehicle doors will lock .
• Locking doors from the inside can help prevent inadvertent
door opening during an accident and can also prevent unwanted
entry from the out side . Locked doors can, however , delay a ssis­
tance to vehicle occupant s and hold up rescue efforts from the
outside in an accident or other emergency.
[ i ] Tips
Be awa re t hat t he rear lid can be op ened from insi de th e vehic le with
the remote rear lid release located in the driver's door. Before you _,.

turn over the valet key you should therefore lock the rear lid
mechanically with the master key. •
Emergency locking
If the power locking system fails (power failure), you will
need to lock the passenger door separately.
i I
"' "'
0,
~ I
"' "'
Fig . 44 Emergency
lock location on the
front passengers door
Fig . 45 Close-up:
inserting the key
For this purpose, a mechanical locking device is provided on
the end panel of the passenger door (only visible when the door is open).
- Open the door.
- Remove the plastic cap using your vehicle key=> fig. 44.
Contro ls and eq uip­
ment
Opening and closing
-Pos ition the key at an angle of 90° to the door trim panel
and push it in the direction shown by the arrow ~ fig. 45.
After you close the door you will not no longer be able to open it
from th e outside .
You can open it from the inside, however, by pulling on the door latch
twice. •
Rear lid
Rear lid
You can also open the rear lid using the fold-out key .
@ ®
~ehicle care
0
ij I
"' "'
Fig. 46 Rear lid : lock
positions
Fig . 47 Position of lock
and handle in the rear
lid ...
irechnical data

Opening and closing
As a general rule, you should use the remote control key to
lock and unlock the rear lid
c:5 =:> page 51. With the key slot
in the vertical position the rear lid can be
locked and
unlocked
by the power locking system using either the
remote-control- or the fold-out key:::::>
page 50.
Opening the rear lid
-Pull the handle :::::> page 55, fig. 47 while lifting the lid.
Closing the rear lid
-Pull it down and shut it firmly:::::>& . There is a recess in
the interior trim of the lid to make it easier to pull down.
To unlock the rear lid with the key
- Turn the key from the vertical to position @ :::::> page 55,
fig. 46 the lid springs open slightly.
- Open the lid.
To lock the rear lid with the key
-Turn key slot to horizontal position @.
Turning the key counter-clockwise to position @will release the
rear lid and cause it to rise slightly. In this position the key cannot
be pulled out of the lock cylinder.
Turning the key
clockwise to the horizontal position@ and pulling
it out will cause the
lid to remain locked when the power locking
system is actuated.
In this state the rear lid can only be unlocked with the remote
control unlock button
c:::5 on the master key.
After you turn the key
counter -clockwise back to the vertical posi­
tion, the rear lid will again respond to the power locking system.
& WARNING
• After closing the rear lid, always pull up on it to make sure that
it is properly closed. Otherwise it could open suddenly when the
vehicle is moving .
• To help prevent poisonous exhaust gas from being drawn into
the vehicle, always keep the rear lid closed while driving . Never
transport objects larger than those fitting completely into the luggage area, because then the rear lid cannot be fully closed .
• Never leave your vehicle unattended especially with the rear lid
left open. A child could crawl into the car through the luggage
compartment and pull the lid shut, becoming trapped and unable
to get out. To reduce the risk of personal injury, never let children play in or around your vehicle. Always keep the rear lid, as well as
the vehicle doors, closed when not in use.
[ i] Tips
In case of an emergency , the rear lid can be opened from the inside
using the trunk escape handle~
page 290. •
Remote rear lid release c::::5
You can open the rear lid from inside the vehicle using a
switch in the driver's door.
Fig. 48 Driver's door,
rear bottom: remote
rear lid release ...

To unlock r ear lid
- Pu ll the switch c:::::5 ~ page 56, fig. 48 in the driver's door.
To open re ar lid
- Raise the rear lid.
The remote rear lid re lease is deactivated automatically if you lock
the rear lid using the key . This enables the driver to lock the luggage
compartment permanently with the key and prevent unwanted
access to the trunk .•
Anti-theft alarm system
Description
The anti-theft alarm triggers an alarm if anyone attempts
to break into the vehicle.
The anti -theft a larm system triggers an audible alarm and turns on
the emergency flasher if an unauthorized interference with the
veh ic le is sensed by the system.
How i s the anti -theft alarm syste m switched on ?
The anti-theft alarm system is switched on when you lock the
driver's door manually using your key, o r when you use the remote
control. The system is activated approx imately 30 seconds after the
vehic le is locked. The indicator light on top of the door trim start
fl ashing rapid ly for 30 seconds and then b link slowly.
How i s the anti -theft al arm syst em switch ed off ?
The anti-theft alarm system is switched off only when you use the
remote contro l to unlock your vehicle . If you do not open a door
with in 60 seconds after you have unlocked with the remote control,
the vehic le will lock itself again automatica lly.
Controls and equip ­
ment
Op ening and clo sing
If you lock just the driver's door using your key, the front
passenger's door, the rear and the fuel f iller flap remain locked.
If you use the vehicle key to unlock the driver's door, the other
doors, the rear lid and the fuel tank flap will remain locked . The
a larm system will not be deactivated unless you insert the key in the
ignition switch within 15 seconds and turn on the ignition. If you fai l
to do this, the a lar m wi ll sound.
When will the anti theft alarm system be triggered?
When the vehic le is locked, the a larm system monitors and protects
the following parts of the vehic le:
• engine compar tment
• luggage compartment
• doors
• vehic le incline
• ignition
• factory installed radio.
When the system is activated, the alarm will be triggered if one of
the doors, the engine hood or the rear lid are opened, or if the igni ­
tion is turned on or the radio removed or if the vehicle incline has
been changed.
The ant i-theft alarm system will also go off when you unlock the rear
lid with your key and open it. The alarm is switched off again when
you close the rear lid.
The anti-theft alarm system will also go off when the battery is d isconnected.
You can also trigge r the alarm by pressing the PANIC button on your
remote control. This will alert other people in case of emergency.
Press the
PANI C button again to turn off the a larm. .,_

Openin g and clo sin g
How is th e a nti-th eft ala rm switch ed off whe n
t riggered ?
The alarm system is switched off when you unlock the vehicle using
the remote control or when the ignition is switched on. The a larm
will a lso switch itse lf off when it comes to the end of its cycle.
Em erg en cy flashe r
The emergen cy flashe r will blink briefly when the doors, engine
hood and rear lid are properly closed .
If the emergency flashers do not blink, check the doors, engine hood
and r ear lid to make sure they are properly closed . If you close a
door, the hood or the rear lid w ith the anti-theft a larm switched on,
the emerg ency flashers will blink only aft er you have clos ed the
door or lid.
[ i ] Tips
• For the anti -theft alarm system to function properly, make sure
all vehicle doo rs and windows are closed before leaving the vehicle .
• When you open the vehicle from the driver's door using the key,
the c entral locking switch will work only af ter you hav e swi tched on
the ignition. •
Tilt sensors ~
The tilt sensors trigger an alarm if they detect vehicle
movement.
N
ij
:c .,
"'
Fig . 49 D river's do or,
rear botto m: ti lt se nso r
sw itch
Sw itch off the tilt se nsors i f you are go ing to have your
ve hicle tr ansported .
Switch off the tilt s ensors
- Press the switch A located in the driver's door=> fig. 49 .
Lock the ve hicle.
When you turn off the tilt sensors, the diode in the switch -lQ wi ll illu ­
minate. Also , the indicator light in the driver's door wil l illuminate
for about three seconds . After you lock the vehicle, the indicator
light in the door trim will b link quickly for about three seconds . After
that, the blinking slows down.
The next time the vehicle is locked, the tilt sensors are automatically
turned on again .•