2011 AUDI A3 differential

Instruments and warning/indicator lights
in. WARNING
• USA models: : If both, the BRAKE warning light and the
warning light come on at the same time, the rear wheels c ould
lo ck up fir st under hard braking . Lo ck-up of the rear wheel brakes
c a n cause loss of vehicle control and an accident. Have your vehicle
repaired immedi ate ly by your authorized Audi dealer or a qualified
workshop . Drive slowly and avoid sudden , hard brake appli cation .
• Canada models : If both, the brake warning light ((j)) and the
ABS warning light
~ come on at the same time , the rear wheels
could lock up first under hard braking . Lock-up of the rear whee l
brakes can cause loss of vehicle control and an accident. Have your
vehicle repaired immediat ely by your authorized Audi dealer or a
qualified work shop. Drive slowly and avoid sudden, hard brake
application
• If the brake warn ing/indicator light does not go out after a few
se cond s and the parking brake rel eased, or light s up while you are
driving , the fluid level in the brake fluid reservoir is too low. If you
believe that it i s safe to do so, proceed immediately at low speed
to the nearest authorized Audi dealer or qualified workshop and
have the brake system in spe cted.
• Please be very careful and always keep
in mind that after
s everal brake application s, you will need greater pressure on the
brake pedal to stop your vehicle. Consequently, you must allow
for increased braking distances. Trying to brake a s quickly a s usual
could lead to an accident. •
Anti-lock brake system B-(USA)/
(Canada)
T his war ning/indicator light monitors th e ABS and the
electronic differential lock (E DL).
The ,... ~ light will come on for a few seconds when the ignition is
switched o n. Th e light w ill go out af ter an automat ic check sequ ence
is comp lete d.
There is a malfunction in the ABS when:
• Th e warning/indicator light does not ill uminate when you swit ch
on t he ignit ion.
• Th e warning/indicator light does not go out after a few seconds.
• The warn ing/ indicator lig ht ill uminates while driv ing.
The brake system will still re spond even without the a ssistance of
the ABS system. See your authorized Audi dealer as soon as
possible to restore full braking performance.
For more information
regard ing the ABS=>
page 192.
The ABS warning light and the brake warning light come on
together. The ABS will not work and you will notice a change in
braking response and performance.
Malfunction in the brake system
USA models: If both, the BRAKE warning light and t he ABS warning
light come on =>
page 15 w hen the par king b rake is re lease d, there
may be a malfunction in the ABS, and there may a lso be a ma lfunction
in the b rake system itself=>&.
Canada models: If both , the brake warning light CCI» and the ABS
wa rni ng light come on=>
page 15 when the parking brake is
re leas ed, there may be a ma lf u nctio n in t he A BS, and there may also
be a malfunction in t he brake system itself=>& .
Malfunction in the electronic differential lock (EDL)
The two systems EDL and ABS work togethe r. T he I ,:- warning light
w ill come on if there is a malfunction in the EDL system=>
page 189.
See your authorized Audi dealer as soon as possib le .
in. WARNING
• If the 11\fl warning light doe s not go out , or if it come s on while
driving , the ABS system is not working properly . The vehicle can
then be stopped only with the brake s operating without ABS
support. You will not have the protection ABS provides. Contact
your Audi dealer as soon as possible. _,,

Intelligent technology
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Intelligent technology
Notice about data recorded by
vehicle control modules
Your vehicle is not equipped with an Event Data Recorder (EDR),
installed by some manufacturers for the express purpose of
capturing data for retrieva l after an accident or crash event. ED R's are
sometimes called "crash recorders".
Some state laws restrict the retrieval or downloading of data stored
by ED R's that were installed 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 w ith
a number of electronic control modu les for various vehicle systems
such as, for example, engine function, emission control, as well as for
the airbags and safety belts.
T hese electronic contro l modules also record vehicle-re lated data
during normal vehicle operation for diagnostic and repair purposes .
Th e recording capacity of the e lectronic control modu les is limited to
data (no sound is recorded) and only a sma ll amount of data is actu­
ally 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 vehicle speed, direction, braking
as well 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
The Electronic Stability Program increases driving
stability .
With ESP, contro l over the vehicle is increased in situations when the
vehicle is close to the limits of grip, such as dur ing accelerat ion and in
curves. ESP reduces the risk of sk idding and improves vehicle stability
unde r all road conditions.
It operates at all speeds.
The Anti-Lock Brake System (ABS), Electronic Differential Lock (EDS) and Anti-Slip Regulation System (ASR) are integrated in the Elec­
tronic Stability Program .
How ESP works
The ESP control unit processes the following data from high-sensitive
sensors: the rotationa l speed of the vehicle about its vertical axis,
fore-and -aft and lateral acceleration forces, brake pressure and
steering angle .
Us ing stee ring ang le and vehicle speed, the direction the driver
wishes to travel is determined and continuously compared with
actual vehicle behavior. If the two do not match, for example when
the vehicle beg ins to skid, ESP brakes the appropriate whee l auto­
matically.
The vehicle is stabilized aga in by the forces act ing on the whee l
during braking. With an oversteering veh icle (tendency for the rear
end to skid out of the curve), the brake app lication is mainly at the
front wheel on the outside of the curve, with an understeering vehicle
(tendency to run wide in the curve) at the rear wheel on the insid e of
the curve or additionally at the other wheels as needed. This brake
application is accompanied by noises. _,

_________________________________________ I_ n_ t_ e_ ll_,igent technology ,__E~-
ESP works in co njunction w ith ABS~ page 192 . If there is malfunc­
t ion in the ABS, ESP is also inoperat ive.
& WARNING
• The limit s of phy sics cannot be su spended by ESP. Even in vehi­
cles with ESP, you should always adapt your driving to road and
traffic conditions. Thi s is particularly true on a slippery and wet
road. Do not be tempted by the increased safety provided to take
ri sk s - danger of an a ccident!
• Please note that when ESP / ASR is deact ivated , the drive
wheel s can spin on icy and slippery roads and the vehicle can break
away -danger of skidd ing! •
Switching on and off
Fig. 155 C ente r
con sole w ith ESP
s wit ch
Th e ESP i s automa tically activ ated w hen the eng ine is st arted, and i t
performs a self-test. As soon as the test is comp leted, the system is
in normal operat ing mode .
Deactivating
ES P s hould no rm ally be activate d at all times beca u se this ens ures
optimum veh icle stability. Only in some cases it does make sense to
de activ at e t he Elect roni c Stabili ty Pr ogr am ( ES P) by p ress ing the
button~ fig. 155. Deact ivat io n i s indicated by the ESP lamp
J! in the
Controls and equip­
ment Safety first
Vehicle operation
instrument cluster flashes . The message ESP OFF appears in the
ins trument cl uste r. Ant i-Slip Regula tion is comp le tely deact iv a te d
and the stab ilizat io n effects from the ESP system are lim ited. This
ma kes a more agile and spo rty driving sty le possible, but the full
extent o f th e stabilization function is not available .
Activating
~~~= Press the [ESP OFF ) button again~ fig. 155 . The ind icator lig ht
goes out . The message
ESP ON appears br iefly in the ins trumen t
cluster disp lay .
& WARNING
You should only switch the ESP off if your driv ing ability and the
traffic situation allow. Please note that when ESP /ASR i s dea cti­
vated, the drive wheels can spin on icy and slippery roads and th e
vehicle can break away -danger of skidding!
[ i ] Tips
If Audi magnetic r ide* is ma lf u nct io ning, the ESP may not sw itch off
or it may switch off automatically . •
Electronic differential lock (EDL}
The ele ctr onic dif ferential lock mo nit ors the rot ational
s p eed of the d rive wheels .
General notes
The elec tron ic differe ntia l lock ( EDL) helps the ca r to sta rt movin g,
acce le ra te and climb a gradient on surfaces provid ing poor or almost
no grip. Without E DL, this would be difficult, if not impossible.
How the system works
Th e E DL operates au tomatically . It mo nitors the rotational s peed of
t he drive wheels on an axle with the he lp of the ABS sensors
~ page 19 2. If a noticeable difference in rotational speed between ..
Vehicle care Do-it-yourself service Technical data

Intelligent technologyL ______________________________________ _
the drive wheels on one axle is detected (e.g . on slippery ground on
one side),
the spinning wheel is braked, thereby transferring power to
the other drive wheel or wheels (all -wheel drive) . This is done up to a
speed of about 60 mph (100 km/h). Noises from the brake system
signal that wheel sp in is being controlled .
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 ab le to transfer power
spms .
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 operat ional and behaves in the same way as a vehicle
without EDL .
As soon as the brake has cooled down, EDL switch es on again auto­
matically.
Electronic limited slip differential*
In vehicles w ith front wheel drive*, an electronic lim ited slip differen­
tial engages when driving on curves. The brakes are applied spec ifi­
cally to the front wheel that is on the inside of the curve. This mini­
m izes sliding on the front wheels and enables precise and neutral
driving through curves. The electronic limited slip differential does
not engage when d riving in wet conditions or snow.
& WARNING
• When accelerating on slippery surfaces, such as on ice or snow,
always be careful when depressing the accelerator pedal. Even
with the EDL and the ele ctronic limited slip differential working,
the drive wheels can spin and reduce your ability to control your
ca r. -Risk of crash!
& WARNING (continued)
• The increased safety afforded by EDL and the electronic limited
slip differential 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 fau lt occurs in the ABS, the EDL is also not f unct ioni ng. This is
indicated by the ABS warning light=>
page 16.
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-Sl ip Regu lation System (ASR) is integrated in the electronic
stabili zation program (ESP) . When the vehicle starts up and acceler­
ates, the wheels are prevented from sp inning by adjust ing the engine
power to match the amount of grip available from the road surface.
How the system works
ASR performs automatica lly, i.e. without the driver's intervention.
With the aid of the ABS sensors=>
page 192, ASR monitors the speed
of the driven wheels. If the wheels start to spin, the engine torque is
reduced automatically until the tires find enough grip to lock onto
the road surface. The system is active across the entire speed range.
The ASR works in conjunction with the ABS. If a malfunction shou ld
occur in the ABS, the ASR w ill also be out of action .
[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 .,

Intelligent technologyL _______________________________________ _
• If the power steering system is not funct ioning properly, contact
your au thori zed A ud i dea le r i mmediately. •
Applies to ve hicl es: wit h A ll Whe el D rive
Driving with your quattro®
With All Wheel Drive, all four wheels are driven.
General information
With All Wheel Drive, power is distributed to all fo ur whee ls. This
happens automatically depending on you r driving s tyle a nd the road
conditions at the time. See also =>
page 189, "Electronic differential
lo ck (E DL)".
W inter tires
W hen d riving in the winter, your vehicle with A ll Whee l Drive has an
advantage, even with reg ular t ires . In winter road cond it ions it may
be advisab le to mou nt w inte r ti res (or all-se aso n t ires) for imp roved
dr iveability and braking: these tires must be mounted on
all four
wheel s.
See also => page 261, "Win ter tires".
Snow chains
W he re snow c ha ins are mand atory on certain roads, this norm ally
also app lies to veh icles with all-wheel drive=>
page 262, "Snow
c hains".
Replacing wheels/tires
Veh icles with All Wheel Drive m ust always have t ires of the same s ize.
Also avoid tires with different tread depths. For details see page
=>
page 257, " N ew tires and replac ing ti res and wheels".
Off-Road driving?
Your Audi does not have enough ground clearance to be used as a n
off-road vehicle. It is therefore best to avoid rough tracks and uneven
te rrain as much as poss ib le. Also refe r to=>
page 199.
& WARNING
Always adjust your driving to road and traffic conditions . Do not
let the extra safety afforded by the all-wheel drive tempt you into
taking extra risk s.
• Although the quattro ®all -wheel drive is very effective, always
remember that braking capacity is limited by t ire traction. You
should therefore not drive at exce ssive speed s on icy or slippery
road surfaces .
• On wet road surfa ces, be careful not to drive too fast becau se
the front wheels could begin to slide on top of the water (hydro­
planing ). If this should occur, you will have no warning from a
sudden increase in engine speed as with a front -wheel drive
vehicle. Always dr ive at speed s which are adjusted to the road
conditions -risk of crash! •
Energy management
Starting ability is optimized
Energy managemen t controls the distribution of elec ­
trical energy and thus optimizes the availability of elec­
t r ical ene rgy for s tarting the en gin e.
If a vehicle w ith a convent ional energy sys tem is not d riven fo r a long
period of time, t he battery is discha rged by idling cur rent consumers
(e .g. immob ilizer). In ce rtain c ircumstances it can result i n there
being insufficient energy availab le to start the engine .
Inte lligent ene rgy m anageme nt in yo ur vehicle h andles the dis tribu­
tion of electrical energy. Starting ability is markedly improved and
t he life of the bat tery is ex tende d.
Bas ically, energy management consis ts of
battery d iagnosis, idling
current management
and dynamic energy management . ~

------------------------------------------~A~ LE P '.!:h ~a~ b~e~ t~ic ~a~ l~ in~ d ~ e~x ~ _lffl'II
Coolant system ....... ... .. .. .. .. .. . 234
Cooling System
Expansion tank .................. 235
Cru ise control .............. ... ..... 110
Changing speed ................. . 111
Presetting your speed .......... .. . 111
Switching off ............. .. .... . 112
Switching on ........... ......... 110
Warning/indicator lights ... .... .... 14
Cup holder ............ ...... .. .. .. .. 89
Cup holders front ........ ...... .. .. .. .. .. .. .. 89
Current fuel mileage ................ .. 21
D
Damp ing
See Audi magnetic ride ......... ... 112
Data ....... .... ...... .. .... .. .. .. . 296
Data recorder ................. .. ... 188
Date display .. .. .. ............... .... . 9
Daytime running lights ............... . S6
Daytime running lights (Canada) ........ 56
Declaration of compliance Cell phone package ............ .. . 303
Electronic immobilizer ... .. .. .. .. . 303
Homel ink® un iversal remote control . 303
Remote control key ............... 303
Ti re pressure monitoring system ... . 303
def What does this mean when it appears in
the trip odometer display? ......... 10
Defective light bulb warn ing . .. .. .. .. .. 36
Controls and equip­
ment Safety first
Defogg
ing the windows ....... .... ... . 98
Defrosting the windows ............... 98
Defrosting/defogging w indows ..... ... 101
Determining correct load limit . ...... .. 254
Diesel engine Add ing engine oil .. .... .. ......... 233
Changing engine oil .. .. ........... 233
Engine oil . ... .... .... ........... 233
Diesel fuel .. .................... ... 220
Diesel particulate filter. . . . . . . . . . . 34, 199
Digital clock . .. ............. .. .... .... 9
Setting the time ............ ....... 9
Digital compass . ................ ... . 71
Dimensions ..... .... ............... 295
Dipstick Reading the dipstick p roperly ..... .. 231
Direct Shift Gearbox Emergency release ............... 121
Distance .... .... .. .... .............. 22
Doors, power locks .... ... .. .. ........ 43
Driver information ................... 31
Driver Information System Menu display ............ ......... 22
Driver information system
Gearshift indicator ............. .. . 19
Menu button . ....... .... .. .. .. .. . 24
Open door or front lid wa rning .. .. .. . 18
Outside temperature display ........ 18
Red symbols ................... ... 30
Service interval display ............. 27
Setting . ................ .. .. .. ... 2s
Sound system display .. .. .......... 18 Trip computer
... ... ..... ... . ... .. 21
yellow symbols .. ................ . 30
Driver seat
See Seating position ...... ..... ... 126
Driving safely .. .. .. .. ............. . 124
Driving through water .... .... .. .. .. . 198
Duplicate key ...... . .. ............... 38
E
Efficiency program . ... .. .. ........... 25
Fuel economy messages ............ 26
Other equipment ... ............... 26
Elapsed time ... ...... ............. .. 21
Electrically heated front seats .. .... .. . 103
Electro-mechanical power assist ... 17, 193
Electronic differential lock (EDL) How the system works .. .... ...... 189
Warning/indicator lights ... .. ... ... 16
Electronic immobilizer . . . . . . . . . . . . 10, 40
Electronic power control
EPC warning/indicator light ......... 13
Electronic speed limiter ........ ...... . 20
Electronic Stability Program ... .... .. . 188
Electronic stabilization program (ESP)
Warning/indicator lights ..... .. .. .. 14
Emergency flasher Warning/indicator lights ... .. ... ... 14
Emergency flashers ... .. .. .... ....... 59
Emergency operation panoramic sliding sunroof ........ .. 53
Rear lid .......................... 46
Vehicle operation Vehicle care Do-it-yourself service Technical data