2018 AUDI A6 brake light

Ass is tanc e system s
What can the braking guard do?
When detected in t ime, the system can assess
dangerous situations where an object ahead
brakes suddenly or if your own vehicle is traveling
at a high speed and approaching an object that is moving more slowly. The braking guard does not
react if it cannot detect the s ituation.
The system advises you of various dangerous sit­ uations :
- T he
dista nce warning occurs if you d rive too
closely to the object ahead for a long period of
time. If the object ahead brakes strongly, you
would not be able to avoid a collision .
The.
indicator light appears as an indication for this.
- The
app ro ach warning occurs when an object
ahead is traveling more slow ly or brakes
strongly. When th is warning occurs, it may only
be possible to avoid a co llision by swerv ing or
braking strongly . The danger is indicated by the
• ind icator light ¢ fig . 98 . An aud io signal w ill
also sound .
If you do not react early enough or at all to a dan­
ge rous situation, the braking guard suppo rts you
with a brak ing intervention .
- If a collision is imminent, the system will f irst
provide an
a cut e warn ing by braking sharply.
- If you do not react to the acute warning, the braking guard can increase the braking force
within the limits of the system
ll . Th is reduces
the vehicle speed in the event of a collision .
- The system can init iate comp lete deceleration
shortly before a collision
ll _ Full deceleration at
high speeds occurs only in vehicles with adap­
tive cru ise control and s ide ass ist (pre sense
pl us).
- If the braking gua rd determines that you are
not brak ing strongly enough whe n there is an
im pending co llision, it can increase the bra king
force .
- T he pre sense functions also engage whe n
t h ere is an impend ing collision ¢
page 94.
l) Th is is not ava ilab le in some co untri es .
92
Which fun ction s can be controlled?
Yo u can swi tch the braking guard and the d is­
tance/approach warning on or
off in the Infotain ­
ment system ¢
page 93, Settings in the Info ­
tainment system .
A WARNING
Lack of attention can cause collisions, other
accidents and ser ious personal injuries . The
braking guard is an assist system and cannot
prevent a collis ion by itself . The dr iver must
a lways intervene. The d river is always respon­
sib le for braking at the co rrect t ime.
- Always pay close attention to traffic, even
when the b raking guard is sw itched on. Be
ready to intervene and be ready to take
co mplete co ntro l whenever necessa ry . Al ­
ways keep the sa fe and legal distance be ­
tween your vehicle and ve hicles up ahead .
- Br aki ng g uard wo rks w ithin limits and w ill
no t respond outside the system limits, for
examp le when approaching a stopped vehi ­
cle or stationary obstacle (end of a traffic
jam or ve hicle that has broken down in traf ­
fic).
- Always remember that the radar sensor for
the brak ing guard works only within defined
detection and range limits that may prevent
the proper detection of other vehicles .
- The radar sensor's function and range can
be reduced by rain, snow and heavy spray.
Mov ing veh icles up ahead may not be
promptly detected or may not be detected
at al l.
- Reflective surfaces including crash ba rr iers
or tunne l entra nces may impair the function
of the rada r senso r.
(D Tips
- You can cancel the braking with increas ing
force that is initiated by the system by brak­ ing yourse lf, by acce le rating not iceably or
by swerv ing.
- Keep in mind that b raking gua rd can b rake
unexpectedly. A lways secure a ny cargo or

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" N .... 0 0 \,;J ' Intelligent Technology Electronic stabilization
control (ESC)
Description
Electronic stabilization control (ESC) supports
driver safety. It reduces the risk of slipping and
improves driving stability. ESC detects critica l sit­
uations such as the vehicle oversteering and un­
dersteering or the wheels are spinning. The vehi­
cle is stabilized by applying the brakes or reduc­ ing engine torque. As soon as the ESC is actively
regulating, the
If] indicator light b links in the in­
strument cluster.
The following systems are integrated in the ESC:
Anti-lock braking system (ABS)
ABS prevents the wheels from locking when brak­
ing. The vehicle can still be steered even during
hard braking. Apply steady pressure to the brake
pedal. Do not pump the pedal. A pulsing in the
brake pedal indicates that the system is act ing to
stabilize the vehicle .
Brake assist system
The brake assist system can decrease braking dis­
tance. It increases braking power when the driver
presses the brake pedal quickly in emergency sit­
uations . You must press and hold the brake pedal
until the dangerous situat ion is over . In veh icles
with adaptive cruise contro l*, the brake assist
system is more sensitive if the distance detected
to the vehicle dr iv ing ahead is too small. On
vehicles with activated and functioning night vi­
sion assist*, the brake assist system can respond more sensitively if there is a warning .
Anti-Slip Regulation (ASR)
ASR reduces eng ine power when the drive wheels
begin spinning and adapts the force to the road
conditions. This makes it easier to start, acceler­
ate and drive up hills.
Electronic differential lock (EDL)
The EDL applies the brakes to a whee l that starts
spinning and transfers the drive power to the
other driving wheel or wheels (if the vehicle is
Intelligent Technology
equipped with a ll wheel drive*). This function is
not avai lab le at higher speeds.
In extreme cases , EDL automatically switches off
to keep t he brake on the braked whee l from over ­
heating. The vehicle is still working correctly. EDL
will switch on again automatically when condi­
tions have returned to normal.
Power steering
The ESC can also support veh icle stability
through steering .
Selective wheel torque control
Selective wheel torque control is used when driv­
i ng on curves. The front whee l on the ins ide of
the curve or both wheels on the ins ide of the
curve are braked selectively as needed. This al­
lows more precise driving in curves.
Automatic post-collision braking system
The "automat ic post-collis ion braking system"
can help to reduce the risk of sliding and of addi­
tional collisions after an accident. If the airbag
contro l module
detects a co llision above a certa in
vehicle speed, the vehicle is braked by the ESC.
T he vehicle does not brake automatically if:
- the driver presses the accelerator pedal, or
- the braking force generated by the pressed brake pedal is greater than the braking force
that would be initiated by the system, or
- the ESC, the brake system or the vehicle electri­
cal system are not functioning.
A WARNING
-
- The ESC and its integrated systems cannot
overcome the lim its imposed by natura l
p hys ica l laws. This is especially impo rtant
on slippery or wet roads. If the systems be­
g in acting to stabilize yo ur vehicle, you
should immediately alter your speed to
match the road and traffic conditions. Do
not let the increased safety provided tempt
you into taking risks. This could increase
your r isk of a coll is ion.
- Please note the risk of a coll ision increases
when dr iv ing fast, especially through curves
and on slippery or wet roads, and when
IIJ,,
119

Intelligent Technology
driving too close to objects ahead . The ESC
and its integrated systems cannot always prevent coll isions
-there is still a risk of ac­
cidents!
- Press the accelerator pedal carefully when
accelerating on even, slippery surfaces such as ice and snow . The drive wheels can spin
even when these control systems are instal-
Switching on /off
led and this can affect driving stability and
increase the risk of a collision.
(D Tips
-ABS and ASR only function correctly when
all four wheels are equipped with identical
tires. Different tire sizes can lead to a reduc­
tion in engine power.
- You may hear noises when the systems de­
scribed are working.
ESC turns on automatically when you start the engine .
Fig. 137 Ce nter con sole: OF F~ button
ESC levels
Sport mode on
The following examples are unusual situations
where it may make sense to switch sport mode
on in order to allow the wheels to spin:
- Rock ing the vehicle to free it when it is stuck
- Dr iving in deep snow or on loose ground
- Driving with snow chains
Sport mode off
Behavior
The ESC and ASR stabilization f unctions Th
e fu ll stabilization f unction of the ESC
are limited
~ &. . and ASR is avai lab le again.
Operating Press the I~ O FF I button . Press the I~ OF F! button again .
Indicator filturns on. . turns off.
lights
Messages Stabilization control (ESC): Sport Warn-Stabilization control (ESC): On
ing! Reduced stability
A WARNING
-Only switch sport mode on when your driv­
ing abilities and the traffic situation permit,
because there is a risk of sliding .
- The stabilization function is limited when
sport mode is switched on. The driving
wheels could spin and the vehicle could
swerve, espec ially on slick or slippery road
surfaces .
120
-
{l) Tips
Sport mode cannot be switched on if the
cruise control system* or adaptive cruise con­
tro l* is switched on .
Brakes
New brake pads
New brake pads do not achieve their full braki ng
effec t during the first 2SO mi (400 km). They
must be "broken in" first.

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" N .... 0 0 \,;J ' Wear Brake pad
wear depends largely on the way the
vehicle is driven and on operating conditions.
This is especially true if you are driving frequently
in the city and on curves or with a sporty driving
style.
Operating noise
Noises may occur when braking depending on the
speed, braking force and outside conditions such
as temperature and humidity.
Effect of water and road salt
In certain situations, for example after driving
through water, in heavy ra in, after overnight con­
densat ion or after washing your car, the braking
effect can be reduced by moisture or ice on the
brake rotors and brake pads. The brakes must be
"dried" first with a few careful brake applica ­
tions.
At higher speeds and with the windshie ld wipers
turned on, the brake pads press against the brake rotors for a short amount of time. This action,
which is not felt by the driver, happens at regular
intervals and ensures a better reaction time for
the brakes in wet weather .
The braking effect can also be reduced if you are
driving on salted roads and you do not apply the brakes for long periods of time. The layer of salt
on the brake rotors and pads must be worn off
f ir st when the brakes are applied.
Corrosion
Leaving the vehicle parked for long periods of
time, low mileage and avo iding heavy brak ing
can contribute to corrosion on the brake rotors
and to d irty brake pads .
If you usually avoid heavy braking or if there is
corros ion present, occasional heavy braking at
high speeds is recommended to clean the brake
rotors and
pads¢ &..
Brake system malfunction
If you notice that the brake pedal travel has sud­
denly
increased, then a brake circuit in the dual­
circu it brake system may have malfunct ioned.
Drive to an authorized Aud i dealer or authorized
Intelligent Technology
Audi Service Facility immediately to have the
problem corrected. On the way there, drive with
reduced speed and keep in mind that you will
need a longer distance to stop and you will need
to press the brake peda l harder.
Low brake fluid level
When the brake fluid level is low, malfunctions in
the brake system may occur . The brake fluid level
is e lectronically monitored.
Brake booster
T he brake booster amplifies the press ure you ap­
ply to the brake pedal. It on ly works w hen the en­
gine is running.
A WARNING
-
-Only apply the brakes for the purpose of
cleaning the brake system when road and
traffic cond itions permit. You must not en­
danger other road users. This increases the
risk of an accident .
- Never let the vehicle roll while the engine is
stopped because this increases the risk of an
accident .
- New brake pads do not ach ieve the ir full
braking effect dur ing the first 250 m i
(400 km). They must be "broken in" first .
However, you can compensate fo r the
slightly reduced braking force by pressing
firmly on the brake pedal. Avoid heavy b rak­
ing during the break -in period.
- Ce rtain weather and operating conditions
such as driving through water, dr iv ing 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
pa ired by dr iv ing 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.
121

Intellig ent T echn olo gy
- If the front spoiler is damaged or you insta ll
another spoiler, make sure the front wheel
brakes are venti lated properly. Otherwise,
the brake system could overheat, wh ich re­
duces the ir effectiveness .
- Failure of a brake circuit impairs braking
performance, which increases brak ing dis­
tance. Avoid driving the vehicle and have it
towed it to the nearest author ized Audi
dealer or author ized A udi Se rvice Fac il ity.
- If the brake booster is not working, you will
have to press muc h ha rde r on the bra ke
peda l to compe nsate for the lack of the
booste r.
0 Note
- Neve r let the brakes "rub" by press ing the
pedal light ly when bra kin g is not actually
ne cessa ry. Th is ca u ses the brakes to over ­
hea t an d increases bra king d istance and
causes wear.
- B efo re dr iv ing downh ill a long distance on a
steep hi ll, de crease your speed and se lec t a
l ower gear . This makes use of the engine
braking effect and relieves the brakes . If
you need to brake additionally, brake in in­
tervals 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, whee l covers or s imilar items, make sure
that the a ir flow to the front whee ls is not
i nterrupted. Otherw ise the brake system
can become too hot .
Electromechanical
steering, dynamic
steering
The electromechanical steering supports the
driver's steering movements.
Power steering adapts electronically based on
the vehicle speed.
122
Indicator lights and me ssag es
• Do n ot driv e vehi cle: Ste ering d efe ctiv e
If this indicator light turns on and stays on and
t hi s message appears, the power steering may
have failed.
Stop the veh icle in a safe location as soon as pos ­
s ible. Do
n o t continue driving . See an authorized
Audi dealer or author ized Audi Service Fac ility for
ass ista nce.
kr-D S te ering: System fault You can cont inu e
dri ving
If the indicator light turns on and the message
appears, the steering wheel may be more d iffi­
cult to move or more sensitive than usual. The
steering wheel may also be at an angle when
driv ing stra ight.
Drive slowly to an authorized Audi dealer or au­
thorized Aud i Serv ice Facility to have the mal ­
funct ion corrected.
l;rfl D ynamic steer ing: Init ializing
If the indicator light is blinking and this message
appears, dynamic steering* is being initialized.
The steering wheel will be easy to move after
start ing the engine. Re-initialization might be
necessary if the steering wheel was moved hard
to the left and r ight while the veh icle was not
moving. T he d isplay turns off if the in it ial izat ion
was successful.
(D Tips
- If the . or ':r,y indicator l ight only stays on
for a sho rt time, you may cont inue d riv ing.
- The dynamic steering stability systems
~page 119 are not ava ilable in the event of
a system malfunct ion.
- For add itional information o n dynamic
steering,
see~ page 104 .

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0 0 <..:l ' On Board Diagnostic
System (OBD)
The On-Board Diagnostic System monitors the
engine and transmission components that influ­
ence emissions.
F ig . 176 Footwell o n le ft s ide of th e vehicle: con nectio n
port fo r th e On -Board Diagnostic System (OBD)
On -Board Diagnostic S ystem
Eng ine data can be read out at the On-Board Di ­
agnostic System connection port using a special
testing device
r::;, fig . 176.
Ind icat or light
If thE' ¢..ift indicator light blinks or turns on, there
is a malfunction that is causing poor emissions
quality and that could damage the catalytic con­
verter .
Drive s lowly to an authorized Audi dealer or au­
thor ized Audi Service Facility to have the mal­
function corrected .
The indicator light can also turn on if the fuel fill­
er cap is not closed correct ly
c::;, page 186.
A WARNING
Incorrect use of the connection port for the
On-Board Diagnostic System can cause mal­
functions, which can then result in acc idents
and ser io us injuries .
- Only allow an author ized Audi dealer or au­
thorized Aud i Serv ice Facility to read out the
engine data.
-
Chec king and Filling
Engine compartment
Working in the engine compartment
Special care is required if you are working in the
engine compartment
For wo rk in the engine com part ment , such a s
che cking and filling fluids, there i s a ris k of i n­
jur y, sc alding, a cci dent s, and b urn s. For t his
r easo n, foll ow all the w arnings and g en e ral
s afe ty pre ca ution s pro vided in the f ollowing
in ­
formati on. Th e engine compartm ent i s a dan­
ge rou s area in the vehicle .
r::;, &..
A WARNING
-Turn the engine off.
- Sw itch the ignition off.
- Set the parking brake.
- Select the "P" selector lever position .
- Let the eng ine cool down .
- Never open the hood when there is steam or
coolant escaping from the engine compart­ ment, because there is a risk that you could
be burned . Wait unt il no steam or coolant is
escaping.
- Keep children away from the eng ine com­
partment .
- Never sp ill fluids on a hot engine. These flu­
ids (such as the freeze protection contained in the coolant) can catch fire.
- Avoid short c ircuits in the electrical system .
- When working in the engine compartment,
remember that the radiator fan can switch
on even if the ignition is switched off, which increases the ris k of personal injury .
- Never open the cap on the coolant expan­
sion tank when the engine is warm . The
coo ling system is under pressure.
-To protect your face, hands, and arms from hot steam or coolant, cover the cap with a
large cloth when opening .
- Do not remove the eng ine cover under any
circumstances . This increases the risk of
bu rns .
- If tests need to be performed with the en­
g ine runn ing, there is add it iona l danger due
to mov ing components (such as the ribbed
~
1 8 9

Care and cl eaning
- 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 braking effect
may be delayed due to mo isture on the
brake rotors or ice in the winter . This in­
c reases the risk of an acc ident. The brakes
must be d ried first w ith a few careful b rake
applica tions.
@ Note
- If you wash the veh icle in an automatic car
wash, you m ust fold the exte rior m irrors i n
to reduce the risk of damage to the mirrors.
Power folding exte rior m irro rs* must o nly
be fo lded in and out using the powe r folding
funct ion .
- To reduce t he risk of paint damage , do no t
wash the vehi cle i n direct sunlig ht. - T
o red uce the risk of damage to the s urface,
do not use insect removing sponges, kitchen
sponges o r similar items .
- Matte finish painted vehicle components:
- To reduce the r isk of damage to the sur-
face, do not use pol ish 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
f inish paint. The paint could be damaged
when the stickers or magnets a re re­
moved.
@ For the sake of the environment
Only wash the veh icle in facilities spec ially de­
s igned for that pu rpose. This will reduce the
r isk of dirty wate r contam inated with o il from
en te ring the sewe r system.
Cleaning and care information
W hen clea ning and ca ring for ind ividua l vehicle
components, refer to the fo llow ing tables. The
information contained there is simply recom­
mendations. For questions or for components t
h at are not listed, cons ult an autho rized Audi
dealer or author ized A udi Servi ce Fac ility. Also
fo llow the information found
in ¢,&. .
Exterior cl eanin g
Component Situation Solution
Wind shield wiper
Deposits soft cloth with glass cleaner,
¢ page 45
blades
Headli ght s/
Deposits Soft sponge with a mild soap so lution3
)
Tail light s
S en sors /
Deposits Sensors: soft cloth with solvent-free cleaning solution
cam era l ens es Camera lenses: soft cloth w ith alcohol -free cleaning solu-
tion
Snow/ice Hand brush/solvent-free de -icing spray
Wheels Road salt Water
Brake dust Acid-free special cleaning solution
E
xhaust tail pip es Road salt Water, clean ing solution su itab le for stainless stee l, if nee-
essary
D ecor ativ e part s/ Deposits Mild soap solution a), a cleaning solution suitable for stain-
trim less steel, if necessary
222

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" N .... 0 0 \.J ' (D Tips
The vehicle jack* in your vehicle is mainte­
na nee-free.
Replacing wheels
Before changing a wheel
Observe the following precautions for your own
and your passenger's safety when changing a
wheel .
'"After you experience a tire failure, pull the car
well away from moving traff ic and try to reach
le ve l ground before you stop ¢,&. .
'"All passe ngers should le ave the car and move
to a safe location (for instance, be hind the
guardra il) ¢ ,&. .
.. Engage the parkin g brake to p revent your vehi ­
cle from rolling
unintentionally ¢,&. .
'"Move selecto r lev er to p osition P ¢ ,&. .
'"If you are towing a trailer, unh itch the trailer
from your veh icle.
'" Take the jac k and the sp are tir e* out of the lug­
gage compartment
i::> page 226 .
A WARNING
You or your passengers cou ld be inju red w hile
chang ing a wheel if you do not follow these
safety precautions :
- If you have a flat t ire, move a safe distance
off t he road. Tur n off the engine, t urn the
emergency flashers on and use other warn ­
ing devices to alert other motorists .
- Make s ure tha t pa ssengers w ait in a sa fe
place away from the vehicle and we ll away
from the road and traffic.
- T o help prevent the vehicle from moving
sudden ly and possibly slipping o ff th e jack,
always fully set the parking brake and b lock
the front and back of the wheel diagonally opposite the wheel be ing changed. When
one front whee l is lifted off the ground,
placing the Automatic Transm ission in P
(Park) w ill
not prevent the veh icle from
moving.
Em ergenc y ass is tanc e
-Before you change a whee l, be sure the
ground is level and firm . If necessary, use a
sturdy board under the jack.
- Always store the vehicle too l kit, the jack
and the replaced tire in the luggage com­
partment
¢ page 130.
(D Tips
Before changing the wheel, you must activate
the jacking mode, so that the automatic con­
tro ls for the Adaptive Air Suspension* do not
make it more difficult to lift the vehicle with
the
jack ¢ page 229 .
Changing a wheel
When you change a wheel , follow the sequence
described below step-by-step and in exactly that
order .
l. Activate the vehicle jack mode* ¢ page 229.
2. Remove the deco rati ve wheel co ver* or the
wheel bolt c aps *. For more details see also
¢ page 228, Decorative wheel covers or
¢ page 228, Wheels with wheel bolt caps .
3. Loosen the wheel bolt s ¢page 229.
4. Locate t he p roper mount ing point for the
jack and align the jack be low that poin t
¢page 229 .
S. R ais e the car with the jack ¢ page 229 .
6. Remove the wheel with the fl at tir e and then
install
the spare ¢ page 231.
7. Tig hte n all wheel bolts lightly .
8 .
Lower the vehicle with the jack .
9 . Use the wheel bolt wrench and
firml y tighten
all wheel
bo lts ¢ page 229.
10. Replace t he decorat ive wh eel cover * or the
wheel bolt cap s*.
11. Deactivate the vehicle jack mode* in t he
MMI :
ICAR I function button > (Car )* sys tem s
contro l button > Ser vicing & che cks > Air
s usp.: jack mod e> Off.
The vehicle jack mode * switches off automatica l-
ly at speeds abov e 6 mph (10 km/h).
.,.
227