2011 AUDI A3 key battery

Opening and closing
• You are well advised not to keep valuables inside an unattended
vehicle, v isible or not . Even a properly locked vehicle cannot provide
the security of a safe! •
Unlocking and Locking the vehicle with the
remote control
How the remote control works.
Fig. 29 Remote
control : function
buttons
To unlock the vehicle doors and rear lid !TI
- Press button @once to unlock d river' door.
- Press button @twice to unlock all doors and the rear lid.
To lock the vehicle doors and rear lid iTI
- Press button ®~ & in "General description" on
page 40.
-Watch that all turn signal lights flash once.
To open rear lid only?:$
-Press button © for approximately one second .
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 function.
The remote contro ls allows you to:
• lock or unlock the vehicle
• selective ly unlock the rear lid.
Th e turn signa ls will flash briefly whenever you lock or unlock the
vehicle. Also, the interior light will come on or go off whenever you
open or close 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
effect ive range depends on several things. Remember, if the battery
is weak, the effective range decreases.
Th e remo te-control key contains a fold-out key that you can use to
manually lock or unlock the vehicle and to start the engine.
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.
& WARNING
Read and follow all WARNINGS ~ & in "General description" on
page 40.
(I] Tips
• The remote contro l key is automatically deactivated when the
ignition is switched on .
• The operation of the remote control key can be tempora rily
disr upted by interference from transmitters in the vicinity of the
vehicle wo rking in the same frequency range (e.g. a cell phone, radio
equipment). _..

- Plug in appliance to be used.
The outlet may be used for 12-volt app liances w ith maxim um
cons umption of up to 100 watts, such as a flash light, small vacuum
cl eaner, e tc.
Before you purchase any accessor ies, always read and fo llow the
info rm ation in::::,
page 301, "Add it io na l acc essories and p arts
re placemen t".
& 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 accessor ies are st ill plugged in and are on,
the ve hicle battery can sti ll be drained .•
Storage
General overview
There are numerous pl aces to st ore items in your vehi cle .
Storage in t he center armrest
Storage in the rear armrest
::::, page 79
Glove com partment (Ai r ven tila tion in t he ::::, page 92
glove compartment*, CD changer*)
Controls and equip ·
ment Safety first
Seats and storage
Center console ::::,
page 92
Compartments in the door tr ims ::::, page 93
Storage in the footwell ::::, page 93
Compartments in luggage compartment ::::, page 94
Coat hooks
Some of the storage locations are only fo und o n specific vehicle
mode ls o r are op tio nal equ ipme nt.
& WARNING
• Always remove objects from the instrument panel. Any items
not put away could slide around inside the vehicle while dri ving or
when accelerating or when applying the brakes or when dri ving
around a corner.
• When you are driv ing make sure that anything you may have
placed in the center console or other stor age locations cannot fall
out into the footwells. In c ase of sudden braking you would not be
able to b rake, depres s the clutch or accelerate .
• Any pieces of clothing that you have hung up must not inter­
fere with the driver's view. The co at hooks are designed onl y for
lightweight clothing . Never hang any clothing with hard, pointed
or hea vy objects in the pockets on the coat hooks. During sudden
braking or in an accident· especially if the airbag is deployed ·
the se objects could injure any passengers inside the vehicle. •
Vehicle care Technical data

ffl..__O_ n_ t_h _e_ r_o _ a_ d _________________________________________________ _
Ignition Lock and ignition switch
Ignition lock
The engine can be started or turned off with the ignition
key.
Ignition off@
Fig. 107 Ignition l ock
p ositions
In position => fig. 107 @ both the ignition and engine are off, and
the stee ring is locked .
To
lock the stee ring after you have removed the ig nit io n key, turn the
steeri ng wheel in either direction until yo u hear it lock into place . You
should always lock the steering whenever you leave your vehicle . This
makes a vehicle theft even more difficult=> & .
Ignition on (D
If it is d ifficul t to turn the key af ter yo u have inse rted it in to the igni­
tion lock, tur n the steering wheel back and forth . T hi s w ill take the
load off the steering lock mechanism and you wi ll be able to t urn the
key freely and start the engine . On vehicles with a d iese l engine *, t he
system ca n preheat in this position .
Starting the engine@
In this pos it ion the engi ne s tarts. While the e ngine is s ta rting, the
power supply to the headlights and other electrical consume rs is temporarily interrupted to conserve ba
ttery power . Afte r th e eng ine
h as st arted, relea se the key and it w ill retur n to posit io n (D .
Before the starter can be operated again the key must be t urned back
to positio n (D . T he
non-repeat lock prevents you from damaging the
s ta rt er when t he e ng ine is running .
& WARNING
• Never remove the key from the ignition lock while the vehicle
i s moving . The steering wheel will lock causing loss of control.
• If you have to leave your v ehicle -even for ju st a minute -
always remove the ignition key and take it with you. This is espe·
cially important if you are going to leave children behind in the
vehicle. The children could start the engine or use other vehicle
control s. Unsupervised use of vehicle controls (for example, power
windows ) can cause serious personal injuries .
(I) Tips
If the vehicle battery has been disconnected and then reconnected,
t hen yo u m ust leave the key in posi tion (Dfor abou t
5 seco nds befo re
you can start the eng ine. •
App lies to vehicles: with automat ic transmission
Ignition key safety lock
Th e ignition k ey can only b e removed when the selector
lever is in the "P" (Park) position.
Pla ce the selector lever i n the "P " pos it ion before swit ching off the
eng ine .
Afte r sw itching of f the igni tion , th e ignition key can o nly be re moved
from the ignition lock when t he selector lever is in the "P" (Park) posi­
t ion. After yo u have remove d the key, t he selector lever is locked a nd
cannot be moved .•

_________________________________________ I_ n_ t_ e_ ll_,igent technology ,__E~-
Battery diagnosis
Battery diagnosis continuously determines the state of the battery.
Sensors determine battery voltage, battery current and battery
temperature. This determines the current state of charge and the
power of the battery .
Idling current management
Idling current management reduces energy consumption while the
vehicle is standing. With the ignition switched off, it controls the
energy supply to the various electrical components. Data from
battery diagnosis is considered.
Depending on the battery's state of charge , individual consumers are
gradually turned off to prevent excessive discharge of the battery and
thus maintain starting capability.
Dynamic energy management
While the vehicle is being driven, dynamic energy management
distributes the energy generated according to the needs of the indi­
v idual components. It regulates consumption, so that more electrical
energy is not being used than is being generated and ensures an
optimal state of charge for the battery.
[ i] Tips
• But even energy management cannot negate the limits of physics.
Consider that the power and life of a battery are limited.
• If starting ability is threatened, you are informed by a warning
=> page 196, "Driver notification in the instrument cluster display". •
What you should know
The highest priority is given to maintaining starting capa­
bility.
The battery is severely taxed in short-distance driving, in city traffic
and during the cold time of year. Abundant electrical energy is
Controls and equip­
ment Safety first Vehicle operation
required, but only a little is generated. It is also critical if the engine
is
not running and electrical components are turned on. In this
instance energy is being consumed but none is being generated .
It is in precisely these situations that you will notice energy manage­
ment actively regulating the distribution of energy.
Vehicle stands for an extended period
If you do not drive your vehicle over a period of several days or weeks,
electrical components are gradually cut back or switched off. This
reduces energy consumption and maintains starting capability over a
longer period.
Take into consideration that when you unlock your vehicle, some
convenience functions, such as the remote key or power seat adjust ­
ment, may not be available. The convenience functions will be avail­
able again when you turn on the ignition and start the engine .
With the engine turned off
If you listen to the radio, for example, with the engine turned off, the
battery is being discharged.
If starting capability is jeopardized due to energy consumption, a
message appears in the driver information display.
You have to start the engine to charge the battery.
With the engine running
Although electrical energy is generated when the vehicle is being
driven, the battery can become discharged. This happens mostly
when little energy is being generated and a great deal consumed and
the battery's state of charge is not optimal.
To bring the energy balance back into equilibrium, consumers which
require especially large amounts of energy are temporarily cut back
or switched off. Heating systems in particular require a great deal of
energy . If you notice, for example , that the heated seats* or the
heated rear window are not heating, they have been temporarily cut
back or switched off. These systems will be available again as soon as
the energy balance has been restored. .,
Vehicle care Do-it-yourself service Technical data

___ C_ h_ e_c _k _i _ n _g ~ a_n _d_ f_il _l_in _ g _________________________________________ _
Closing the engine hood
- Pull the hood down until the pressure from the strut is
reduced.
- Let the hood
drop down and latch in place . Do not try to
push it shut;
it may fail to engage=> &.
& WARNING
A hood that is not completely latched could fly up and block your
view while driving.
• When you close the engine hood, check it to make sure the
safety catch has properly engaged. The hood should be flush with
the surrounding vehicle body parts.
• If you notice while driving that the hood is not secured prop­
erly, stop at once and close it. •
Working in the engine compartment
Be especially careful whenever you work in the engine
compartment!
Whenever you must perform any work in the engine compartment,
for example checking and filling different fluids, there is a risk of
injury, burns and accidents. To prevent personal injury always
observe the following WARNINGS. The engine compartment of any
vehicle is a hazardous area!~
&
& WARNING
To help avoid injury, before you check anything under the hood :
• Turn off the engine.
• Remove the ignition key.
• Set the parking brake fully.
& WARNING (continued)
• Move selector lever of automatic transmission to "P" (Park);
put manual transmission in Neutral.
• Always let the engine cool down. Hot components will burn
skin on contact.
• To reduce the risk of being burned, never open the hood if you
see or hear steam or coolant escaping from the engine compart­
ment. Wait until no steam or coolant can be seen or heard before
carefully opening the hood.
• Keep children away from the engine compartment.
• Never spill fluids on hot engine components. They can cause a
fire.
• Never touch the radiator fan. The auxiliary electric fan is
temperature controlled and can switch on suddenly.
• Never open the coolant reservoir cap when the engine is still
warm. The coolant system is pressurized and hot coolant could
spray out!
• Protect your face, hands and arm from steam or hot engine
coolant by placing a thick rag over the cap when you open the
coolant reservoir.
• If work on the fuel system or the electrical system is necessary:
-Always disconnect the battery .
- Never smoke or work near heaters or open flames. Fluids in
the engine compartment could start a fire.
- Keep an approved fire extinguisher immediately available.
• To avoid electrical shock and personal injury while the engine is
running or being started, never touch:
- Ignition cables
- Other components of the high voltage electronic ignition
system.
• If you must perform a check or repair with the engine running: .,_

___________________________________________ C_ h_e _c _k_ i_n ~g_ a_n_ d_ f_ i_ll _i_n _g __ _
nected. These functions have to be relearned after the battery termi­
nals are connected again. To prevent this, the battery should only be
disconnected from the vehicle electrical system if absolutely neces­
sary.
Power window one-touch
up/down function
Reprogramming
~ page 51, "Reactivating the sys­
tem after battery disconnection"
Master key with remote control Synchronization~
page 43
Digital clock ~ page 9
ESP indicator light The indicator light goes out after
driving a few meters
Vehicles not driven for long periods and short­
distance operation
If you do not drive your vehicle for several days or weeks, e lectrical
consumers are gradually scaled back or switched off. Th is reduces
energy use and ensures the vehicle will be able to start after long
periods of time~
page 194. Some convenience functions such as
opening with the remote control key may not be available. These
convenience functions will be available again once you switch the
ignition on and start the engine. Even when consumers are switched
off, the battery will become deeply discharged by stand-by power
consumers if the vehicle is not driven for several months . Deep
discharging results in a chemica l reaction that destroys the inside of
the battery. The battery must be charged every month to prevent th is
~ page 241. Do not disconnect the battery or the anti-theft alarm
system* will not work.
Winter operation
Cold weather places higher demands on the battery. This results in
reduced starting abi lity. Have the battery checked and recharged if
necessary before the cold weather beg ins.
Avoid unnecessary power consumption, part icularly in city traffic or
when travel ing on ly short distances. Let your author ized Audi dealer
Safety first
check the capacity of the vehicle battery before winter sets in
~ page 241. A well charged battery will not only p revent start ing
problems when the weather is cold, but will also last longer.
(D Note
• All work on the battery requires techn ical knowledge. Please
contact an Audi dealership or another authorized facility for ques­
tions about the battery- danger of acid burns and explosion hazard!
• The battery m ust not be opened! Do not try to change the
battery's liquid level, otherwise detonating gas will escape from the
battery - explosion hazard!
• The AGM battery in the luggage compartment cannot leak,
because the electrolyte for this battery is absorbed into a specia l
glass mat . This leak -proof battery must not be replace with a conven ­
tional battery .
• Make sure the ventilation hose on the side of the battery is
connected, otherwise fumes or battery acid can leak out.
• Battery holder and terminals always have to be secured correctly .
• Before all work on the battery follow the
warnings below~ & in
"Working on the battery" on
page 239. •
Working on the battery
All work on the battery requires technical knowledge! Be
especially careful when working on or near the battery!
Before you check anything in the engine compartment,
always
read and heed all WARNINGS~ & in "Working in
the engine compartment" on
page 226 .
Always heed the safety warnings, when working on the vehicle
battery or the vehicle electrical system to prevent injury .
Vehicle care Technical data