2018 AUDI A6 brake sensor

a co .... N
" N .... 0 0 \.J ' If one of these indica to r li ghts does no t turn on,
there is a ma lfu nction in t hat system.
Red indicator lights ~..::.._ __________ _
USA models:
b rake system .I
c::> page 12
Canada models:
bra ke sys te m .I
c::> page 12
USA models :
elec tromechanical parking brake
c::> page 13
Canada models:
e lectromechanical pa rking brake
c::> page 13
Cooling sys tem
c::> page 13
E ng ine oi l pressu re
c::> page 1 4
Eng ine oi l level ( MIN )*
c::> pag e 15
A lternator
Eng ine stop wh ile dr iv ing
c::> page 14
F ront safety belt
c::> page 14
Elect romecha nica l steer ing ./
c::> page 122
Steer ing lock
c::> page 1 5
En gine sta rt system
c::> page 15
USA models:
spee d war ning sys­
t em
c::> page 8 4
Canada models :
speed warning
system
c::> page 84
Adapt ive cr uise control* ./
c::> page 88
Air suspension
c::> page 15
Instruments and indicator lights
N ight vision assist*
c::> page 10 2
Night vision assist *
c::>page 102
Centra l indicator light
c::> page 10
Yellow indicator lights
~--==-------------:--­
E lectronic Sta bilizat ion Contro l
TPMS
(ESC) .I
Elec tron ic St abiliz ati on Contro l
( E SC)
.I
USA models:
an ti-lock b raking system (ABS) ./
Canada models:
anti-lock b raking system (ABS) ./
c::> page 16
USA models:
sa fe ty sys tems
c::> page 16
Canada models:
safe ty sy stems
c::> page 1 6
Br ake pads
c::> page 16
Electromechanical parking brake
c::> pag e 13
Tire p ressure
c::> page 218
Tire p ressure
c::> page 218
Engine co ntro l (gasoline engine) ./
c::> page 16
Malfunction Ind icator Lamp (MIL)
.I
c::> page 189
En gine s peed li mita tio n
c::> page 1 7
En gine o il level (MI N)*
c::> page 15
En gine o il sensor
c::> page 17
11

Instruments and indicator lights
/:
12
Engine warm-up request
¢page 17
Battery charge
¢page 14
Tank system
¢page 17
Washer fluid level
¢page 17
Windshield wipers
¢page 17
Remote control key
¢page 68
Remote control key
¢page 70
Battery in remote control key
¢page26
Bulb failure ind icator
¢ page 17
Rear fog lights
¢page 17
Headlight range control system
¢page 18
Adaptive light*
¢page39
Light/rain sensor
¢page 18
Active lane assist*
¢ page 96
Transmission
¢page 79
Transmission
¢page 79
Steer ing lock
¢ page 15
Engine start system
¢page 15
Brake booster
¢ page 16,
Central indicator light
¢page 10
Electromechanica l power steering,
dynamic steering*
¢page 122
A ir suspension*
¢ page 15
Sport differential*
¢page 18
Other indicator lights
--------------
Turn signals
¢page 18
USA models :
cruise control system
¢page 84
Canada models:
cruise contro l system
¢ page84
Adaptive cruise control*
¢page 88
Adaptive cruise contro l*
¢ page 88
Adaptive cruise contro l*
¢ page 88
Active lane assist*
¢page 96
Start/Stop system*
¢page 70
Start/Stop system*
¢page 70
High beam ass istant*
¢ page39
High beams
¢page39
BRAKE/{©) Brake system
If this indicator light turns on, there is a malfunc­
tion in the brake system.
1111 (USA models) /. (Canada models) Stop
vehicle and check brake fluid level!
Stop the veh icle and check the brake flu id level.
See an authorized Audi dealer or authorized Audi
Service Facility for assistance if necessa ry .
1111 (USA models) /. (Canada models)
Brakes: malfunction! Please stop vehicle safely
.,.

Ass is tance sy stem s
Audi adaptive cruise
control
Description
A pp lies to: ve hicles w ith Audi adaptive cruise co ntro l
F ig. 88 Detection range
The adaptive cruise control system is a combina­
tion of speed and distance regulation.
It assists
the dr iver by bot h regula ting the speed and
maintaining a distance to the vehicle driving
ahead, within the limits of the system .
If the sys­
tem detects and object ahead, adaptive cruise
control can brake and accelerate your vehicle.
This makes driving more comfortable both on
long stretches of hig hway and in stop-and-go
traffic .
What c an adapti ve crui se control do ?
The adaptive cruise contro l system uses video, ra­
dar and ultrasound. Objects driving ahead can be
recognized up to 650 feet (200 m) away.
On open roads with no traffic, it functions like a
cruise control system . The stored speed is main­
tained. When approaching an object ahead, the
adaptive cruise control system automatically brakes to match that object's speed and then
maintains t he stored d istance . As soon as the
system does not detect an object ahead, adaptive
cru ise control acce lerates up to the stored speed .
In stop-and-go traffic, adaptive cru ise control can
brake unt il the vehicle is stat ionary and then be­
g in driving aga in under certain conditions
c::> page89.
Audi braking guard can war n you about an im ­
pending collision and initiate brak ing maneuve rs
<=:> page 91 .
86
Which functions can be controlled?
When you switch ad apt ive cr uise control on, you
can set the current speed as the "control speed"
c::> page 88, Switching on/off.
When dr iving, you can stop cruise cont rol
¢ page 90 or ch ange the speed c::> page 89 at
any time.
You can also set the distance to the object mov­ i ng ahead and se t the driving mode of t he adap­
tive cr uise
control¢ page 90.
General information
App lies to : vehicles wi th Audi adap tive c ruise con trol
Fig. 89 Fro nt of th e vehicle: senso rs a nd video camera
The areas that contain the rada r and ultrasonic
senso rs and the video camera
c::> fig . 89 must not
be covered by stickers, deposits or o ther objects
because this can interfere with the function of
the adapt ive cruise control system and braking
guard . For info rmation on clea ning, see
¢ page 221. The same applies for any modif ica­
tions made in the front area.
The function of the adaptive cru ise control sys­
tem and braking guard is limited under some
cond itions.
- Objects can only be detected when they are
w ith in the sensor range
<=:>page 86, fig. 88.
- The system has a l imi ted abili ty to detect ob­
jec ts that are a sho rt d istance ahead, off to the
side of your vehicle or moving into your lane.
- Obje cts that are d ifficult to detect such as mo­
torcycles, veh icles with high ground clea rance
or an overhanging load are detected late or not
detected at all.
- When driving through curves
c::> page 88. IJ>

a co .... N
" N .... 0 0 \,;J ' -With stationary objects ¢ page 88.
A WARNING
Always pay attention to traffic when adaptive
cruise control is switched on and braking
guard is active . As the driver, you are still re­
sponsible for starting and for maintaining
speed and distance to other objects. Braking
guard is used to assist you . The driver must
always take action to avoid a collision. The
driver is always responsible for braking at the
correct time.
- For safety reasons, do not use adaptive
cruise control when driving on roads with
many curves, when the road surface is in
poor condition and/or in bad weather (such
as ice, fog, gravel, heavy rain and hydroplan­
ing). Using the system under these condi­
tions increases the risk of an accident.
- Switch adaptive cruise control off tempora­
rily when driving in turning lanes, on ex­
pressway exits or in construction zones. This
prevents the vehicle from accelerating to
the stored speed when in these situations .
- The adaptive cruise control system will not
brake by itself if you put your foot on the ac­
celerator pedal. Doing so can override the
speed and distance regulation.
- When approaching stationary objects such
as stopped traffic, adaptive cruise control
will not respond and braking guard will have limited function.
- The adaptive cruise control system and
braking guard do not react to people, ani­
mals, objects crossing the road or oncoming
objects.
- The function of the radar sensors can be af­
fected by reflective objects such as guard
rails, the entrance to a tunnel, heavy rain or
ice.
A WARNING
- Improper use of adaptive cruise control can
cause collisions, other accidents and serious
personal injury.
- Never let the comfort and convenience that
adaptive cruise control and braking guard
Assistance systems
offer distract you from the need to be alert
to traffic conditions and the need to remain
in full control of your vehicle at all times,
- Always remember that the adaptive cruise
control and braking guard have limits -they
will not slow the vehicle down or maintain
the set distance when you drive towards an
obstacle or something on or near the road
that is not moving, such as vehicles stopped
in a traffic jam, a stalled or disabled vehicle.
If registered by the radar sensors, vehicles
or obstacles that are not moving can trigger
a collision warning and if confirmed by the
video camera, an acute collision warning.
- Never follow a vehicle so closely that you
cannot stop your vehicle safely. The adap­
tive cruise control cannot slow or brake the
vehicle safely when you follow another vehi­ cle too closely. Always remember that the
automatic braking function cannot bring the
vehicle to a sudden or emergency stop un­
der these conditions .
- To prevent unintended operation, always
switch ACC off when it is not being used .
@ Note
The sensors can be displaced by impacts or
damage to the bumper, wheel housing and underbody . That could affect the adaptive
cruise control system and braking guard .
Have an authorized Audi dealer or authorized
Audi Service Facility check their function.
(D Tips
For an explanation on conformity with the
FCC regulations in the United States and the
Industry Canada regulations, see
¢page 250.
87

a co ,...,
N
" N ,...,
0 0 <..:l ' ~-~ ---D istanc e 1: this setting corresponds
to a distance of
92 ft (28 m) when traveling at 62
mph (100 km/h), for examp le (time between: 1
second).
~ --~--Distance 2: this setting corresponds
to a distance of 118
ft (36 m) when traveling at
62 mph (100 km/h), for examp le (time between:
1.3 seconds).
~ -- -~ -Distance 3: this setting corresponds
to a distance of 164
ft (SO m) when traveling at
62 mph (100 km/h), for examp le (time between:
1.8 seconds).
~ -- --~ Distance 4: This setting corresponds
to a distance of 210
ft (64 m) when traveling at
62 mph (100 km/h), (time distance of 2.3 sec­
onds).
A WARNING
Following other vehicles too closely increases
the risk of collisions and ser ious perso nal in­
jury.
- Setting short distances to the traffic ahead
reduces the t ime and distance available to
br ing your vehicle to a safe stop and makes
it even mo re necessary to pay close atten­
t ion to traffic.
- Always obey applicable traff ic laws, use
good judgment, and select a safe following
dis tance fo r the traffic, road and weathe r
condit ions .
{]) Tips
-Distance 3 is set automatically each time
you switch the igni tion on.
- You r settings are automatically stored and
assigned to the remote control key being
u sed.
Selecting the driving mode
A pplies to: ve hicles with Audi adaptive cruise co ntro l
.. Select the des ired driving mode in dr ive se lect
¢ page 104.
Assi st a nce systems
(D Tips
Your settings are automatically stored and as­
s igned to the remote control key being used.
Request for driver intervention
Applies to : vehicles wi th Audi ada ptive c ruise control
Fig. 97 Instrument cluster: request for driver intervention
In certain si tuations, the system will request you
to take action:
- I f the brak ing from the ad apt ive cru ise con trol
sys tem is not enough to ma intain eno ugh dis­
tance to the object ahead .
T he da nger is indica ted by
the . indica tor light
¢ fig. 97. A n aud io signa l wi ll also so u nd .
- Press the brake pedal to slow your vehicle down.
Audi braking guard
App lies to : vehicles with A udi ada ptive cr uise control
Fig. 98 Inst rume nt cluste r: approach warnin g
The braking guard uses radar sensors and a video
camera . It also functions w ith in the limits of the
system when adaptive cru ise control is switched
~ ~
91

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

a co .... N
" N .... 0 0 \.J ' objects t hat you a re transport ing to red uce
the ris k of damage or i njury.
Settings in the Infotainment system
Applies to: vehicles with Audi adaptive cruise control
~ Select : the ICARI function button > ( Car )* Sys ­
tems
control button > Driver assistance > Audi
braking guard .
System -
switch the brak ing guard On /Off. When
you switch the ign it ion on, the message
B raking
guard: Off
appears if the sys tem is switched off .
Early warning -the distance and approach warn ­
ings in the display can be switched
On /Off .
(D Tips
-You r settings are automatically stored and
assigned to the remote contro l key being
u sed .
-If yo u rest rict or sw itch off the ESC, t he
bra king gua rd also sw itches itself off
c> page 120.
-Switc h braking guard off w hen yo u are load ­
i ng t he ve hicle onto a vehicle ca rr ier, t rain,
s hi p or other type o f transportation . This
ca n prevent undesired warnings from the
braking guard system .
Messages
Applies to: vehicles with Audi adaptive cruise control
Braking guard: Off
This message appears if the system is switched
off through the Infota inme nt system . Otherwise,
if the system is turned off, the information ap ­
pea rs every time shortly after the start of the
tr ip.
The message also appears if the system is not
ava ilable d ue to a malfunct io n or if the ESC is
sw itched off
c> page 120 . If this is the case, the
sys tem w ill not prov ide warnings about a possi­
b le co llision.
Braking guard: engaged
This message appea rs if a sharp brake press ure
was applied due to an acute wa rning.
A ss istance systems
ACC: Unavailable!
ACC and Audi braking guard: Unavailable
The system cannot guarantee that it will detect objects correctly and is sw itched off . The sensors
have been moved or are faulty . Th e p re sense
funct ions may a lso be affec ted . D rive to an au­
tho riz ed Au di dealer or author ized Audi Serv ice
F aci lity immed iate ly to have the ma lfunction co r­
r ected .
ACC: Currently unavailable. No sensor vision
A CC and Audi braking guard: Currently unavail­
able. No sensor vision
This message appears if the sensor v iew is ob­
structed, for examp le by leaves, snow, heavy
spray or dirt . Clean the sensors
c> page 86 ,
fig . 89 .
AC C: Currently unavailable . Gradient too steep
T he road exceeds the maxim um poss ible angle
fo r safe adaptive c ruise contro l operation . Adap­
tive cruise control is switched off.
ACC : Only available in D , Sor M
Select t he "D/S" or "M" se lecto r lever position .
ACC: Currently unavailable . Parking brake ap ­
plied
T he adaptive cr uise cont rol system switches off
automat ica lly if the parking brake is set.
ACC: Currently unavailable . Stability control
( ESC ) input.
This message appears if the e lectro nic s tabiliza­
t io n c ontrol ( ES C) is tak ing a ct ion to s tabili ze the
vehicle. In t his case, adaptive cruise contro l
switches off automatically.
ACC off : Manual control!
Th is message appears when adaptive c ruise co n­
t rol cannot set the parking brake . P ress the brake
peda l to prevent the veh icle from ro lling.
• ••
T hree white dots appear if a setting cannot be se ­
l ected w ith the operating lever. For example, this
happens if adapt ive cru ise control cannot sta rt
driv ing automat ica lly in stop-and-go traff ic
93

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