2016 AUDI A3 brake light

Ass is t
- The pre sense b asic functions may not be
available if there is a ma lfunction in the ESC
system or the airbag contro l module.
- Note that with pre sense basic, the reversi­
ble safety belt pretensioner on the front
passenger 's s ide deact ivates when the front
passenger's airbag is deactivated.
Audi pre sense front
Description
A pp lies to veh icles: with Audi pre sense front or Audi adapt ive
cr uise control
Pre sense front informs you if the distance to the
vehicle ahead falls below the safe distance for an
extended period of time.
It c an warn of a poss i­
b le co llision and initiate braki ng maneuve rs,
within the limits of the system.
When detected in time, the system can assess
dangerous s ituations where an object ahead
b rakes suddenly or if your own vehi cle is t raveling
at a high speed and approaching an object that is
mov ing more slowly. If detect ion is not possible,
then pre sense front does not react.
Warnings
Applies to veh icles: with Audi p re se nse front o r Aud i ada ptive
cr uise con trol
F ig . 12 5 Instrument cluster: app roach wa rning
The system recognizes var ious dange rous situa­
tions:
- Vehicles with adapt ive cruise control: the
dis­
tance warning
appears if yo u drive too closely
to an object for a long period of time. If the ob­
ject ahead b rakes strongly, you would not be
l ) Thi s is not ava ilab le in some co un tri es .
140
able to avoid a collision. The indicator light .
indicates this.
- T he
approach w arning occurs when an object
ahead is traveling more slowly or brakes
strong ly. When this warning occurs, it may only
be possible to avoid a coll is ion by swerving or
braking strongly. The message
Aud i p re sense
• c:> fig. 125 and a warning tone will warn you
about the danger. For vehicles with adaptive
cruise control, the. indicator light also turns
on .
If you do not react enough or not at all to a da n­
gerous s ituation that was detected by the sys­
tem , pre sense front provides assistance by ap­
plying t he b rakes .
- If a collision is imminent, the system will first
prov ide an
acute w arning by braking sharply .
You will also be made aware of the danger by the ins trument cluste r display
c:> fig . 125. For
veh icles with adaptive cru ise cont rol, the . in­
dic ator light a lso tu rns on .
- If you do not react to the acute warning, pre
sense front can brake w ith increasing force
w it hi n the lim its of the system
l )_ This reduces
the vehicle speed in the event o f a collis ion . The
message
Audi pre sense -Input also appears.
- At low driving speeds, pre sense front can begin
complete deceleration shortly before a
co llision
l).
- If p re sense front determines t hat you are not
braking strongly enough when a co llision is im­
m inent, it can increase the braking force.
A WARNING
-
- Pre sense front cannot overcome natura l
phys ica l laws. It is a system designed to as ­
sist and it cannot prevent a collision . The
driver m ust always intervene . The dr iver is
always responsible fo r braki ng at the correct
time . Do not let the in crease d sa fety prov id­
ed tempt you into ta king risks. This could in­
crease your risk of a collision .
- The system can dep loy inco rre ctly due to
sys tem-specific li mits.

,....,
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wireless te lecommunications provider and the
"About Aud i connect" tab in your vehicle's
MMI:
! MENUI button> Aud i connect > About
Audi conne ct .
Electronic stabilization
control (ESC)
Description
Electronic Stabilization Control (ESC) supports
driver safety. It reduces the risk of slipping and
improves dr iving stability. ESC detects crit ical sit­
uations suc h as the vehicle overstee ring and un­
de rs teer ing or the wheels are sp inning. The vehi­
cle is s tabilized by app ly ing the brakes or reduc­
i ng e ngine torque. Once t he ES C i s ac tiva ted, the
indicator light
DJ b li nks in the instrument clus ­
ter .
The fol low ing systems are integrated in the ESC:
Anti-lock braking system (ABS)
ABS preve nts the whee ls from lock ing whe n brak­
i ng. The vehicle can s till be steered even during
h a rd brak ing. Apply steady press ure to the brake
pedal. Do not pump the pedal. A puls ing in t he
bra ke pedal indica tes th at the system is act ing to
s tabili ze the vehicle.
Brake assist system
The brake assist sys tem can decrease braking dis­
tance .
It increases brak ing power when the d rive r
p resses the brake pedal q uic kl y in eme rgency sit­
uations. Yo u m ust press and hold the b rake pedal
u nti l the dangero us si tuati on is over. In ve hicles
with adaptive cruise contro l*, the bra ke assist
system is more sensitive if the d istance detected
to the veh icle ahead is too small.
Anti-slip regulation (ASR)
ASR red uces eng ine power when the drive wheels
begin spinning an d adapts the force to the road
conditions. This makes it easie r to sta rt, acceler ­
ate and drive up inclines .
Intelligent Technology
Electronic differential lock (EDL)
T he ED L brakes wheels t hat are spi nning and
transfe rs the drive power to the o ther dr ive
whee l or wheels if the vehicle is equ ipped with all
whee l drive *). T his function is not available at
higher speeds.
In extreme cases, ED L automat ica lly swi tches off
to keep the b rake o n the braked whee l from over­
heating. The vehicle is still working correct ly. ED L
will switc h on again automatically when condi­
tions have returned to normal.
Steering recommendation
T he ESC he lps to s tabilize the vehicle by changing
the steering torque.
Selective wheel torque control
Se lective w heel torque con trol is used w hen d riv ­
i ng on curves. The front whee l on the ins ide of
the curve or both wheels on t he i nsid e of the
c ur ve are braked se lective ly as needed . This al ­
lows more precise driving in c urves .
Automatic post -collision braking system
T he "Automat ic pos t-collis ion braki ng system"
ca n help to reduce the ris k of sliding and of othe r
collisions af ter an a cciden t. If th e ai rbag cont rol
module detects a collision above a certai n vehicle
speed, the vehicle is brake d by the ESC.
T he veh icle does not br ake au tomatic ally if:
- the dr iver presses the acce lera tor pedal, or
- the braking fo rce generated by the pressed
brake pedal is greater than the b raking force
that would be in itiated by the system, or
- the ESC, the brake system o r the veh icle electri­
cal system are not functioning.
A WARNING
- T he ESC and its i nteg rated systems ca nnot
over come the li mits posed by natu ral physi­
cal laws. This is espe cially impor tant on slip­
pery o r we t roads . If the systems beg in act­
ing to stabilize your veh icle, you should im ­
mediately a lter your speed to match the
road and tra ffic condit ions. Do not let the
increased safety provided tempt you into
159

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You should only switch sport mode on or switch ESC/ASR off if your driving abilities
and road conditions permi t.
- The stabilization function is limited when
sport mode is sw itched on . T he driving
w heels could spi n and the veh icle cou ld
swerve, espec ially on s lick o r sli ppery road
s u rf aces.
- T here is no veh icle stabilization when ESC/
ASR a re swi tched off.
(D Tips
- ESC/ASR cannot be switched off or sport
mode cannot be sw itched on if t he cru ise
contro l system* or the adaptive c ruise con­
tro l* is sw itched on .
- Mal functions in the Audi magnet ic r ide may
make it imposs ible to sw itch the ESC/ASR
off or to switc h sport mode on .
Brakes
New brake pads
New brake pads do not ac hieve the ir full braking
effect during the first 250 mi (400 km) . They
must be "b roken in " fi rs t . However, you can com­
pensate for the slightly reduced bra king fo rce by
p ressing firmly o n the brake pedal. Avoid heavy
b raking during the break -in period .
Wear
Brake pad
wear depends largely on the way th e
ve hicl e is driven a nd on operat ing cond itions.
This is especially true if you are d riving frequently
in the c ity and on c urves o r wi th a sporty driving
style.
Operating noise
Noises may occur when bra kin g depend ing on the
speed , braking force and ou ts ide cond it ions s uch
as tempe rature and humidity .
Effect of water and road salt
In certain situations, for example after dr iving
through water, in heavy ra in, after ove rnig ht con­
densat ion or after washing your car, the b raking
Intellig ent Technology
effect ca n be reduced by moist ure o r ice on the
bra ke rotors and brake pads . The brakes must be
"d ried" first with a few caref ul brake applica­
tions.
At h igher speeds and w ith the wi ndshield wipe rs
tu rned on, the brake pads press against the brake
roto rs fo r a short amount of time. This action
wh ich is not felt by the dr iver happens at reg ular
interva ls and facilit ates a be tter reaction t ime for
the brakes in wet weather .
The braking effect can a lso be reduced if yo u are
driv ing on salted roads and yo u do not app ly the
brakes for long per iods of time . The layer of salt
o n the brake rotors and pads must be wor n off
first whe n the bra kes are applied .
Corrosion
Leaving the vehicle pa rked for long periods of
time, low mileage and avoiding heavy braking
can contribute to corros ion on the brake rotors
and dirty brake pads .
If you usua lly avoid heavy brak ing or if there is
corrosion present, occasiona l heavy brak ing at
high speeds is recommended to clean the b rake
roto rs and pads<=>,& .
Brake system malfunction
if you notice that t he b rake pedal travel has sud­
denly gotten larger, t hen a b rake c ircuit may have
failed. Drive to an author iz ed Audi dealer or au­
thorized Audi Serv ice Facility immediately to have
t h e problem corrected. On the way there, drive
with red uced speed and keep in mind that a long
bra king d ista nce and increased pressu re on the
br ak e pedal w ill be necessary.
Low brake fluid level
When the brake fluid level is low, malfunctions in
the brake system may occur . The b rake fluid level
i s elec tronica lly monito red .
Brake booster
The brake booster amp lifies the press ure you ap­
ply to the brake pedal. It on ly operates wh ile the
engine is run ning o r when the ignition is switched
on (p lug-i n hyb rid dr ive*) . .,.
161

Intelligent Technology
A WARNING
-New brake pads do not achieve their full
braking effect during the first 250 mi
-
(400 km). They must be "broken in" first .
However, you can compensate for the
slightly reduced braking force by pressing
firmly on the brake pedal. Avoid heavy brak­
ing during the break-in period.
- Only apply the brakes for the purpose of
cleaning the brake system when road and
traffic conditions permit. You must not en­
danger other road users. This increases the
risk of an accident.
- On steep slopes, reduce the speed and se­
lect a lower gear or lower selector lever po­
sition. Drive as little as possible while press­
ing the brake pedal and avoid putting your
left foot on the brake pedal while driving.
This could cause the brakes to overheat and
impair the efficiency of the brakes.
- Do not let the brakes "grind" by always
keeping your foot on the brake pedal. This
can cause the brakes to overheat, increase
wear and increase braking distance unneces­
sarily.
- Certain weather and operating conditions
such as driving through water, driving in heavy rain or driving after washing your ve ­
hicle can impair the effectiveness of the
brakes . In the winter, ice may build up on
the brake pads, rotors and drums. Check
these components by braking carefully. Ap­
plying the brakes carefully several times
dries the brakes and removes ice build-up .
- The efficiency of the brakes can also be im­
paired by driving for long stretches on roads
covered with salt without using the brakes.
You can remove salt deposits from the brake rotors and pads by carefully applying
the brakes several times.
- If the front spoiler is damaged or you install
another spoiler, make sure the front wheel brakes are ventilated properly . Otherwise,
the brake system could overheat, which re­
duces their effectiveness .
- Failure of a brake circuit impairs braking
performance, which increases braking dis -
162
tance. Avoid driving the vehicle and have it
towed it to the nearest authorized Audi
dealer or authorized Audi Service Facility.
- Never let the vehicle roll while the engine is
stopped because this increases the risk of an
accident .
- If the brake booster is not working, you will
have to press much harder on the brake
pedal to compensate for the lack of the
booster.
(D Note
- Never let the brakes "rub" by pressing the
pedal lightly when braking is not really nec­
essary. This causes the brakes to overheat
and increases braking distance and causes
wear .
- Before driving on a long stretch with steep
slopes, reduce your speed and shift to the
next lower gear This makes use of the en­
gine braking effect and relieves the brakes.
If you need to brake additionally, brake in
intervals and not continuously.
(D Tips
- If the brake booster is not working, you
must press the brake pedal with much more
force than normal.
- If you retrofit your vehicle with a front spoil­
er, wheel covers or similar items, make su re
that the air flow to the front wheels is not
interrupted. Otherwise the brake system
can become too hot.
Electromechanical
steering
The electromechanical steering supports the
driver's steering movements.
Power steering adapts electronically based on
the vehicle speed .
The vehicle still has full steering functionality if
the power steering fails or when the engine is
stopped (towing) . To steer, you must apply much
more force than usual. .,.

Checking and Filling
cont inue driving. See an authorized Audi deal ­
er or authorized Audi Service Facility for assis­
tance .
Radiator fan
The radiator fan switches on outomotico/ly by it­
self.
An auxiliary elect ric radiator fan sw itches on and
off depend ing on coolant temperature and other
vehicle operating conditions.
After you switch the engine off, the auxiliary fa n
can cont inue runn ing fo r up to 10 minutes -even
with the ignition off . It ca n even switch on again
later by itself¢.&. , if
- the temperature of the engine coolant r ises due
to the heat bu ild -up from the engine in the e n­
gine compartment, or
- the engine compartment heats up because the
vehicle is parked in intense sunlight .
A WARNING
-To reduce the risk of pe rsonal injury never
touch the radiator fan .
- The auxiliary electric fan is temperature
controlled and can switch on suddenly even
when the eng ine is not running.
- The auxiliary radiator fan switches on auto­
matically when the engine coo lant reaches a
certain tempe rature and w ill cont inue to run
until the coolant temperature drops.
Brake fluid
Checking brake fluid level
F ig . 19 9 Engine co mpar tment: cove r o n t he b rake fluid
r e servo ir (example)
246
-
Before yo u check any thing in the engine compart ­
ment,
always read and heed all WARNINGS
¢ page 236, Working in the engine comport­
ment .
.,. Read the brake fluid level from the brake f luid
reservoir ¢
fig. 199, ¢ page 239, fig. 193 (ga­
soil engine) or ¢
page 240, fig. 194 (diesel en­
gine). The brake fluid level must be between
the "MIN" and "MAX" markings .
The location of the brake fl u id reservoir can be
seen in the engine compartment i llustration
q page239.
The fluid level may drop slightly after some time
due to t he automatic adjustment of the brake
pads. This is not ca use for a larm.
If t he brake fluid level falls considerably below
the "M IN" mark, the brake warning/indicator
li ght ~ (U.S. models)
I. (Canadian models)
will come on
q page 18 . Do not continue to oper­
ate the vehicle . The complete brake system
shou ld be thorough ly checked by an authorized
Audi dealer or other qualified fac ility and the
cause corrected .
If the brake fl uid level is too
l ow, the bra ke war ning/ indicato r light w ill illumi­
na te. Cont act an a uthor ized Audi dealer
immedi­
atel y.
Changing brake fluid
Have the brake fluid changed by an experienced
technician.
B rake fl uid abso rbs moistu re from the air. If the
wa ter con ten t in the brake fluid is too high, cor­
r osion in the bra ke system may res ult after ape­
riod of time. The boi ling po int of the brake fluid
will a lso decrease considerably and decrease
bra king performance.
Therefore, the bra ke fluid m ust be changed
every
two year s. Always use new brake f luid which con­
forms to Federa l Motor Vehicle Standard " FMVSS
116 DO T 4" .
The brake fluid reservoir can be diffic ult to reac h,
the refore, we recommend that you have t he
brake fluid changed by your author ized
Audi
dealer .
Your dealer has the correct tools, the

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you.
A WARNING
- Brake fluid is poisonous. It must be stored
only in the closed original container out of
the reach of chi ldren!
- Brake failure can resu lt from old or inappro­
priate brake fluid. Observe these precau­
t ions:
- Use only brake flu id that meets SA E speci­
fication
J 1703 and conforms to Federal
Motor Vehicle Standard 116. Always check
with your authorized Audi dealer to make
sure you are using the correct brake fluid.
The correct type of brake fluid is also indi­
cated on the brake flu id reservoir.
- The brake fluid must be new. Heavy use of
the brakes can cause a vapor lock if the
brake fluid is left in the system too long.
This can ser iously affect the efficiency of
the brakes as well as your safety. This
could result in an acc ident.
(D Note
Brake fluid w ill damage the pa int of your vehi­
cle.
For the sake of the environment
Because of the prob lem of proper disposal of
brake flu id as well as the special tools re­
quired and the necessary expertise, we rec­
ommend that you have the brake fluid
changed by your author ized Audi dealer.
Battery
General information
All work on the battery requires expert knowl­
edge.
Read and foll ow t he WARNING S before check­
ing anything in the engine compartment
¢ page 236, Working in the engine comport ­
ment.
Ch eck ing and Filling
Plug -in hybrid drive* : you can find important in ­
formation about the high -vo ltage battery under
¢ page 98.
The battery in yo ur Audi does not need any ma in­
tenance under
normal operating conditions . Audi
recommends having the electrolyte level check
by an authorized Audi dealer or author ized Audi
Service Facility when there are
high outside tem­
peratures or when dr iving all day. The e lectrolyte
level should also be checked each time the bat ­
tery is charged¢
page 249.
Have the battery checked when you bring your ve­
hicle in for an inspection. It is a good idea to re­
place the battery if it is more than 5 years old.
D uring certa in types of a irbag deployments, the
battery is d isconnected from the veh icle electri­
cal system for safety reasons¢
& in Repair, core
and disposal of the airbags on page 199.
Di sco nnecting the battery te rminal s
The battery should not be disconnected. Several
vehicle functions (power windows, for example)
will be lost when the battery is disconnected. The
funct ions must be reprogrammed after connect­
ing the battery. To avoid this, the battery should
only be disconnected from the vehicle electrical
system when it is absolutely necessary.
To reprogram the functions, proceed as follows:
Function Reprogramming
Power window one-¢ page 44, Correcting
touch up/down func-power window molfunc-
tion tions
Remote control key or
If the vehicle does not
Convenience key react to the key, it must
be synchronized
¢page 37
Dig ita l clock ¢page 10
ESC indicator light The indicator light goes
out after driving a few
meters
247

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-Only wash the vehicle when the ignition is
off and follow the instructions from the car
wash operator to reduce the risk of acci­
dents.
- To reduce the risk of cuts, protect yourself
from sharp metal components when wash­
ing the underbody or the inside of the wheel
housings.
-After washing the vehicle, the brak ing effect
may be delayed due to mo isture on the
brake rotors or ice in the w inter . The brakes
must be dried first w ith a few careful brake
applica tions .
{[) Note
-If you wash t he vehicle in an automatic car
wash, yo u m ust fold the e xterior m irrors i n
to reduce the risk of damage to the mi rrors.
Power folding exte rior m irrors* must o nly
b e fo lded in a nd out usin g the power folding
f u nct io n.
-
Ca re and cleaning
- To prevent pa int damage, do not wash the
vehicle in direct s un light .
- To re duce the risk of damage to the surface,
do not use insect removing sponges, kitche n
sponges o r similar items .
- Matte finish painted veh icle components:
- To reduce the r isk of damage to the sur-
face, do not use po lish ing agents or hard
wax.
- Never use protective wax. It can destroy
the matte finish effect .
- Do not place any stickers or magnetic
signs on vehicle parts painted with matte
finish paint . The paint cou ld be damaged
when the stickers or magne ts are re ­
moved.
@ For the sake of the environment
Only wash t he veh icle in facili ties s pec ially de­
s igned for that pu rpose . This will reduce the
r isk of dirty wate r contamina ted with o il from
ente ring the sewe r sys tem.
Cleaning and care information
W hen clea ning and ca ring for individua l vehicle
comp onents, refer to the following t ables. The
inf ormat ion cont ained there is s imp ly recom ­
mendations. For q uest ions or for components t
h at are not l isted, cons ult an autho riz ed Aud i
de aler or author ized A udi Se rvice Fa cility. Also
f o llow the information fo und in ~ .&. .
Ext erior cleaning
Component Situation Solution
Windshield wiper
D eposits ~ page 53, Cleaning windshield wiper blades
blades
Headlights /
Deposits So
ft spo nge with a m ild soap solutiona)
Tail lights
Sensors /
Deposits Sensors: soft cloth w ith solvent-free cleaning solution
camera lenses Camera lenses: soft cloth w ith alcohol-free cleaning solu-
tion
Snow/ice Hand br
ush/solven t-free de -icing spray
Wheels Road salt Water
Brake dust Acid-free special clean
ing so lution
Exhaust tail p ipes Road salt Water, clea ning so lu tion su itab le for s tainless stee l, if nee-
essary
Decorati ve parts / Deposits Mild soap so lution a>, a cleaning solution su itable for stain-
Trim less stee l, if necessary
275
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-Do not raise the vehicle until you are sure
the jack is securely engaged.
- Passengers must not remain in the vehicle
when it is jacked up.
- Make sure that passengers wait in a safe
p lace away from the vehicle and well away
from the road and traff ic.
- Make sure jack position is correct, adjust
as necessary and then cont inue to raise
the jack.
- Changes in temperature or load can affect
the height of the vehicle.
CD Note
Do not lift the vehicle by the sill. Position the
veh icle jack on ly at the designated lifting
points on the sil l. Otherwise, your vehicle will
be damaged.
Taking the wheel off/installing the spare
Follow these instructions step-by-step for chang­
ing the wheel .
Fig. 2 18 Ch anging a whee l: using the screwd river handle
(with the blade removed) to turn the bolts
F ig . 2 19 Ch ang ing a whee l: alig nmen t pin inside the top
hole
Em ergen cy a ssis tanc e
After you have loosened all wheel bolts and
raised the vehicle off the ground, remove and re­
place the wheel as follows:
Removing the wheel
.,.. Use the hexagonal socket in the screwdri ver
handle
to comp letely remove the topmost
wheel bo lt and set it aside on a
clean su rface
c!>fig. 218.
.,.. Screw the threaded end of the alig nment pin
from the tool kit hand-tight into the empty bo lt
hole
r::!> fig . 219.
.,.. Then remove the other wheel bolts as descr ibed
above .
.,.. Take off the wheel leaving the alignment p in in
the bolt hole
~ 0-
Putting on the comp act spare wheel
.,.. Lift the spare wheel and carefully slide it over
the alignment p in to guide it in place
r::!> (0 .
.,.. Use the hexagonal socket in the screwdr iver
handle to screw in and tighten a ll wheel bolts
slightly .
.,.. Remove the alignment pin and insert and t igh t­
en the remaining wheel bo lt s light ly like the
rest .
.,.. Turn the jack hand le counter -clockwise to lower
the vehicle until the jack is fully released .
.,.. Use the wheel bolt wrench to tighten a ll wheel
bolts firmly
r::!> page 285 . Tighten them cross­
wise,
from one bo lt to the (approx imately) op­
posite one, to keep the wheel centered .
CD Note
When removing or installing the wheel, the
rim co uld h it the brake rotor and damage the
r otor. Work carefully and have a second per­
son help you.
0) Tips
Never use the hexagonal socket in the handle
of the sc rewdrive r to loosen or t ighten the
whee l bolts.
- Pull the reversible blade from the screwdr iv­
er before yo u use the hexagona l soc ket in
t he handle to tu rn the whee l bolts.
287