2015 AUDI A7 brake sensor

14 Instrum ent s and w arn ing /indic ato r light s
Electromechanical parking
brake
c::>page 16
Tire pressure monitor ing sys­
tem../
c::> page270
Tire pressure monitoring sys­
tem
c::> page270
Electronic power control../ (al­
te rna tive to
II)
c::> page20
Glow plug system
(alternative to
Gi)
c::> page 21
Malfunction indicator Lamp
(MIL)../
Diesel particulate fi lter* clog­
ged
c::> page 21
Engine speed limitation
c::>page 21
Engine oil level
c::> page 18
Engine o il sensor
c::> page 22
Battery
c::>page 17
Tank system
c::>page22
Windshie ld washer fluid level
c::>page22
Windshie ld w ipers
c::> page22
AdBlue ./'
Rear fog light(s)
c::> page 22
Headlight range control
c::>page22
adaptive light*
c::>page 22
Light-/rain sensor fau lty
c::>page 23
Audi act ive lane assist*
c::>page 96
T ransmission (tiptronic)
c::>page 114
Transmission
- S tron ic
c::>page 114
Electronic steering column lock
c::>page 18
Engine start system
c::>page 18
Central indicator light
c::>page 19
Electromechanical steering, dy­
namic steering*../
c::>page 200
Air suspens ion*
c::>page 18
Sport differentia l*
c::> page 23
Rear spoiler
c::>page 197
Refill Ad Blue*
c::>page 221
AdBlue malfunction*
c::>page 221
Remote cont ro l key
c::>page 76
Other indicato r lights
,---=--~-----
Remote cont ro l key
c::> page 78
Battery in remote control key
c::> page32
Defect ive light bulb warning
c::>page 22
Tu rn signa ls
c::> page23
USA mod els : Cruise control*
c::>page 84
Can ada models : Cruise control*
c::> page 84
Adaptive cruise control*
c::> page 88

86 Audi adapti ve cruise control and bra king gu ard
Audi adaptive cruise
control and braking
guard
Introduction
App lies to vehicles: with Audi adaptive cruise co ntrol
The adaptive cruise control system assists the
driver by regu lat ing vehicle speed and helping
to maintain a set distance to the vehicle
ahead, within the limits of the system.
If the
system detects a moving vehicle up ahead,
adaptive cruise control can brake and then ac­
celerate your vehicle. This helps to make driv­
ing more comfortable both on long highway
stretches and in stop-and-go traffic.
The braking guard system can warn you about
an impending collision and initiate braking
maneuvers
c:::> page 92.
Adaptive cruise control and braking guard
have technical limitations that you must
know, so please read this section carefully, un­
derstand how the system works and use them
properly at all times.
General information
General information
Applies to vehicles: with Audi adaptive cruise control
Fig. 89 Front of th e veh icle: senso rs and video camera
The areas that conta in the radar and ultrason­
ic sensors and the v ideo camera
c:::> fig. 89
must neve r be cove red by stic kers or other ob­
jects or obstructed w ith dirt, insects, snow or
i ce that will interfere with the adaptive cruise
control system and braking guard. For infor­
mation on cleaning, refer to
c:::> page 212. The same applies for any modifications made in
the front area.
T he function of the adaptive cru ise contro l
system and braking guard is limited under
some cond itions:
- Objects can only be de tected when they are
w ith in sensor range
c:::>page 88, fig. 92.
- The system has a limited ability to detect
objects that are a short d istance ahead, off
to the side of your vehi cle or mov ing into
your lane.
- Some kinds of ve hicles are hard to detect;
for examp le motorcycles, veh icles with high
ground clearance or overhanging loads may
be detected when it is too late or they may
not be detected at all.
-When driving through curves
c!,>page 87 .
-Stat ionary objec ts c:::> page 87.
& WARNING
A lways pay attention to traffic when adap ­
tive cruise contro l is switched on and brak­
ing g uard is active. As the dr iver, you are
still respons ible for starting and for main­
taining speed and distance to other ob­
jects. Braking guard is used to assist you .
The dr iver must a lways take action to avo id
a collis ion . The driver is a lways respons ible
fo r braking a t the co rrec t time.
- Imp roper use of adaptive cru ise control
can cause collisions, other acc idents and
serious pe rsonal in jury.
- Never let the comfort and convenience
that adaptive cruise control and braking gua rd offer d istract you from the need to
be alert to traffic condit ions and the
need to rema in in fu ll control of your ve­
h icle at a ll times,
- Always remember that the adaptive
cruise control and braking guard have
limits -they will not s low the vehicle
down or maintain the set distance when
you drive towards an obstacle or some­
thing on or near the road that is not
mov ing, such as vehicles stopped in a
traffic jam, a stalled o r disabled vehicle.
I f registered by the radar sensors,

M N <( I.J "". rl I.O
"' rl
"' rl
Audi adapt ive crui se c ontrol an d bra kin g guard 8 7
vehicles or obstacles that are not moving
can trigger a collision warning and if con­
firmed by the video camera, an acute col­ lis ion warn ing.
- For safety reasons, do not use adaptive
cruise control when driving on roads with
many curves, when the road surface is in
poor condit ion and/or in bad weather
(such as ice, fog, gravel, heavy rain and
hydroplan ing). Using the system under
these cond itions cou ld result in a co lli ­
sion .
- Switch adaptive c ruise control off tempo­
rar ily when driv ing in turning lanes, on
expressway exits or in construction
zones . This prevents the vehicle from ac­
celerating to the set speed when in these
situations .
- The adapt ive cru ise control system w ill
not brake by itse lf if you put your foot on
the accelerator pedal. Doing so can over­ ride the speed and distance regulation .
- When approaching stationary objects such as stopped traffic, adaptive cruise
control will not respond and braking
guard w ill have limited function.
- The adapt ive cruise control system and
braking guard do not react to people, an­
ima ls, objects crossing the road o r on­
coming objects .
- The function of the radar sensors can be
affected by reflective objects such as
guard ra ils, the entra nce to a tunnel,
he avy rain or i ce.
- Never follow a veh icle so closely that you
cannot stop your vehicle safe ly. The
adaptive cruise cont ro l c anno t slow or
brake the veh icle safely when you follow
another vehicle too closely. Always re­
member that the automatic braking
funct ion cannot bring the veh icle to a
sudden or emergency stop under these
condit ions .
- To prevent unintended operation, always
switch ACC off when it is not be ing used. (D Note
The sensors can be displaced by impacts or
damage to the bumper, wheel housing and
underbody. That cou ld affect the adaptive
cruise control system and brak ing guard .
Have your authorized Aud i dea le r or a u­
thorized Audi Serv ice Facility check their
funct ion.
In curves
Applies to vehicles: with Audi adaptive cruise control
I
F ig. 90 Ex ample: dri vin g in to a curve
When dr iving into a curve c:> fig. 90 and out of
a cu rve, the ad aptive cruise con trol may react
to a vehicle in the next lane and apply the
brakes . You can override or prevent the brak­
i ng by pressing the accelerator pedal b riefly.
Stationary objects
Applies to vehicles: with Audi adaptive cruise control
Fig. 91 Ex ampl e: object chang ing l anes and sta tio nar y
ob jec t
The adaptive cru ise con tro l system only reacts
to objects that a re mov ing o r th at the system
has a lready detected as moving . For examp le,
if a veh icle @, which has a lready been detect-
ed by the adaptive c ruise contro l, tu rns o r
changes lane s and another stationary vehicle .,._

92 Audi adaptive cruise control and braking guard
Audi braking guard
Descript ion
Applies to vehicles: with Audi adaptive cruise control
Fig. 99 Instrument cluster: approach warn ing
Braking guard uses radar sensors and a video
camera . It also functions within the limits of
the system when adapt ive cruise control is
switched off .
What can braking guard do?
When detected in time, the system can assess
situations when a vehicle ahead brakes sud­
denly or if your own vehicle is traveling at a
high speed and approaching a vehicle up
ahead that is moving more slowly . Brak ing
guard does not react if it cannot detect the
situation.
The system advises you of various situations:
- The
distance warning is given if you are too
close to the vehicle ahead for a long time. If
the vehicle ahead brakes sharply, you will not be able to avoid a collision . The indicator
light. in the display comes on.
- The
approach warning is given when a de­
tected vehicle up ahead in your lane is mov ­
i ng much more slowly than you are or if it
brakes sharply . When this warning is given,
it may only be possible to avoid a collision
by swerving or braking sharply . Th e indicator
light. and indicator in the display will
warn you about the danger
c::> fig. 99. You
will also hear an acoustic signa l.
ll This is not ava ilable in some co un tri es .
If you do not react fast enough or do not react
at all to the situation, braking guard will inter·
vene by braking.
- If a coll is ion is imminent, the system will
first provide an
acute warning by briefly and
sharply applying the brakes.
- If you do not react to the acute warning,
braking guard can brake wit h increasing
force w ith in the limits of the system . This
reduces the vehicle speed in the event of a
collision.
- The system can initiate maximum braking
short ly before a collision
1l . Full deceleration
at high speeds occurs only in vehicles with
adapt ive cruise control and side assist (pre
sense plus).
- If the braking guard senses that you are not
braking hard enough when a collision is im·
m inent, it can increase the braking force.
- The pre sense functions also engage when a
collision is imminent
c::> page 192.
Which functions can be controlled?
You can switch braking guard and the dis­
tance/approach warning on or off in the MMI
c::> page 93, Settings in the MMI.
A WARNING
Lack of attention can cause collisions, oth­
er accidents and serious personal injuries.
The braking guard is an assist system and
cannot prevent a collision by itself. The
driver must always intervene. The driver is
always respons ible for braking at the cor­
rect time.
- Always pay close att ent ion to traffic,
even when the braking guard is switched
on. Be ready to intervene and be ready to
take comp lete control whenever necessa­
ry . Always keep the safe and legal dis­
tance between your vehicle and vehicles up ahead.
- Braking guard works within limits and
will not respond outside the system lim· its, for example when approaching a ..,.

M N <( (.J
'SI: ,...., \!) 1.1"1 ,...., 1.1"1 ,....,
Audi adaptive cru ise control and brakin g guar d 93
stopped vehicle or stationary obstacle
(end of a traff ic jam or veh icle that has
broken down in traffic).
- Always remember that the radar sensor
for the braking guard works only within
defined detection and range limits that
may prevent the proper detection of oth ­
er vehicles .
- The radar sensor's function and range
can be reduced by rain, snow and heavy
spray . Moving vehicles up ahead may not
be promptly dete cted or may not be de­
tected at all.
- Reflective surfaces in cl ud ing crash barr i­
ers or tunnel ent rances may impai r the
f unc tion of the radar sensor.
(D Tips
- You can ca nce l the braking w ith increas­
i ng force that is initiated by the system
by b raking yo urself, by accelerating no­
tice ably or by swerving.
- Bra king guard error messages
¢ page 93.
- Keep in m ind that braking guard can
brake unexpec tedly . Always secure a ny
c ar go or objec ts th at you are transpor t­
i ng to reduce the risk of damage o r in­
ju ry.
Settings in the MMI
App lies to vehicles: with Audi adaptive cruise co ntrol
... Se lect: I CAR I function button > (Car )* sy s­
tems
contro l button > Dri ve r assist > Audi
braking guard .
System -
Switch braking g uard On and Off .
When you sw itch the ignition on, the message
Audi b raking guard off appears if the system
is switched off.
Early warning -The d istance and approach
warn ings in the disp lay can be switched
On /
Off .
@ Tips
- Your settings are automatica lly stored
and ass igned to the remote control key being used at the time the settings
are
made .
-If you res trict the E SC, the braking gua rd
also sw itches itself off¢
page 197 .
-Swi tch braking guard off when you a re
loading the vehicle onto a veh icle ca rrier,
t rain, ship o r other type of t ransporta­
t ion . This can prevent undesired warn­
ings from the braking guard system.
Messages
App lies to vehicles: wi th Audi ada ptive c ruise con tro l
Braking guard : off
T his dr iver message appears if the system is
turned off via the info tainment . Othe rwise , if
the system is turned off, the information ap ­
pears every time shortly after the start of the
trip.
T he driver message a lso appears if the system
is not ava ilable d ue to a malfunct ion or if the
ESC is not switched on¢
page 197 . If this is
the case, the system w ill not prov ide warnings
a bout a poss ible collision.
Braking guard : activated
T h is dr iver message appears if sharp b rake
pressure was applie d due to an acu te warning.
ACC: Unavailable!
ACC and Audi braking guard: not a vailable
The system cannot detect mov ing vehicles up
ahead correctly and is switched off . The sen­
sors have been displaced or are not working proper ly. The Audi pre sense functions may al­
so be affected . Drive to your authorized Aud i
dealer or author ized Audi serv ice facility im­
med iate ly to have the malfunction cor rected .
ACC: currently unavailable. No senso r vis ion
ACC and b rak ing guide: cu rrentl y una va ila­
ble . No sensor visio n
This mess age appears if the senso r view is ob­
structed, for examp le by leaves, snow, heavy
spray or dirt. Clean the sensors
i=:> page 86,
rg .89 . ~

M N <( (.J
'SI: ,...., \!) 1.1'1 ,...., 1.1'1 ,....,
Vehicl e ca re a nd cl eanin g 213
A WARNING
-Only wash the vehicle when the ignition
is off and follow the instructions from
the car wash operator to reduce the risk of accidents .
- To reduce the r isk of cuts, protect your­
self from sharp metal components when
wash ing the underbody or the inside of
t he wheel housings.
- After washing the vehicle, the braking ef­
fec t may be delayed due to mo isture on
the brake rotors or ice in the winter. The
brakes must be dried first with a few
careful brake applications.
Q) Note
- If you wash t he vehicle in an automatic
car wash, yo u must retrac t the rear spoil­
er if necessary, and fo ld the exter ior mir­
rors in to reduce the risk of damage.
Power folding exterior mirrors* must on­
l y be folded in and out using the power
fo ld ing funct ion.
- To prevent paint damage, do not wash
the veh icle in direct sunlight. -
To reduce the risk of damage to the sur­
face, do not use insect removing spong­
es, kitchen sponges or similar items.
- Matte finish painted vehicle compo­
nents:
- To reduce the risk of damage to the surface, do not use polishing agents or hard wax.
- Never use car wash cycles that apply protective wax.
It can destroy the
matte fi nish effect.
- Do not place any stickers or magnet ic
signs on vehicle parts painted w ith
matte fi nish paint. The paint cou ld be
damaged when the stickers o r magnets
are removed.
@ For the sake of the environment
Only wash the vehi cle in facilities spec ial ly
designed for that purpose . This will red uce
the risk of dirty water contam inated with
oil from entering the sewer system.
Cleaning and care information
When cleaning and caring for individua l vehi ­
cle components, refer to the follow ing tab le.
The information contained there is s imply rec­
ommendations. For quest ions or for compo- nents
that are not listed, refer to an author­
ized Audi dealer or a qualified workshop. Also
follow the information found inc>,& .
Cle aning e xte rior
Component Situation Solution
W ip er bl ade s
Dirty c> page 49, Cleaning windshield wiper blades
Headlights/ Dirty Soft
sponge with a mild soap solution al
tail lights
S ensor s/
Dirty Sensors: soft cloth with a solvent-free cleaning product
cam era l enses Camera lenses: soft cloth with an alcohol-free cleaning
so lution
Snow/ice Hand brush/solvent-free de-icing spray
Whe els Road sa lt Water
Brake dust Acid-free special cleaning solution
Ex haust t ail Road sa lt Water, cleaning solut
ion suitable for sta inless steel, if
pipe s necessary
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282 Fuses and bulbs
No . Equipment Amps
4 Suspension control system sen-
5
sor
5 Electron
ic Stabilization Control
5
(ESC) mod ule
6 Climate
control
5
7 Adaptive cruise control 10
8
Airbag control module, front
5
passenger's seat sensor system
9 Gateway 5
Garage door opener (Homelink),
10 night vision system contro l 5
module
11 Image processing (active
lane
10
ass ist, adaptive cruise control)
12 Dynamic steering 5
13 Terminal 15
in the instrument
15
panel
14 T
ermina l 15 in the luggage com-
partment 30
15 T
erminal 15 (engine)
15
16 Starter 40
Fuse panel @ (brown)
No . Equipment Amps
1 Gateway
5
2 Climate control 10
E lec tronic Stabilization Contro l
10
3
(ESC) module
4 Front door (driver's
side)
30
5 Power seat adjustment (driver's
7,5
seat)
6 Dynamic steering
35
7 Su nroof 20
Rear door control module (driv- 15
8
er's side)
9 Lumbar support (Front passen-
5
ger seat)
10 Tire pressure monitoring system
5
11 Su
nroof, rear spoiler (Sportbac k)
20
12 Driver door
control module
15
Fuse panel© (red)
No . Equipment
2 Fuel pump
3 Brake light sensor/brake pedal
sensor system
4 AdBlue control module (Diesel)/
Engine acoustics
5 Left rear door contro l modu le
6 Power
seat adjustment (pas-
senger's seat)
7 Horn
8 Windshield wiper motor
9
Light/rain sensor, heater for vid-
eo camera in windscreen
10 Lumbar support (dr iver seat)
11 Front
passenger door control
module
12 Right rear door control mod ule
Front passenger side cockpit fuse
assignment Amps
25
5/5
5/7,5 30
7,5 15
30
5
5
15
15
Fig. 220 Front passenger side cockpit: fu se pane l w ith
plastic bracket
Fuse panel @ (black)
No. Equipment Amps
1 Head-up Display
5
2 MMI Display 5
3 CD/DVD changer
5
4 MMI unit/dr ives 7,5
5 Chip card reader (not
in all coun-
5
tries)
6 Instrument cluster
5
7 Steering column switch module 5

M N <( (.J
'SI: ,...., \!) 1.1'1 ,...., 1.1'1 ,....,
Data ...... .. .... .. .... ... .. .. ... 293
Start-Stop -System . . . . . . . . . . . . . . . . . . 81
start ing . ... .... ...... ... .. .. .. .. .. 76
Starting with jumper cab les .. .. .. .. . 285
Stopping . . . . . . . . . . . . . . . . . . . . . . . . . . 77
E ng ine compartment .... ... .. .. .. .. . 22 7
C losing the hood . ..... ... .. .. .. .. . 226
Opening the hood ..... ... .. .. .. .. . 225
Safety instructions ........ .. .. .. .. . 225
Working in the engine compartment . . 225
E ng ine coolant ... ...... ... .. .. .. ... 231
Adding coolant . .. ..... ... .. .. .. ... 232
Chec king the engine coolant leve l .. .. . 23 1
Expansion tank ........... .... .. .. . 231
Malfunct ion symbo l ....... .. .. .. .. .. 16
Radiator fan .............. ... ... .. 233
Temperature gauge ........... ... ... 11
Engine oil ... .... .. .... ... .. .. .. ... 227
Adding .. .. ............. .... .. ... 229
Addit ives . .. ............. .... .. .. . 229
Changing .. .. ... .. ... ... .. .. .. ... 230
Checking the eng ine o il level .. .. ... .. 229
I ndications and cond it ions requ iring ex-
tra check ing ............. .... .. ... 229
I ndicator ligh t . . . . . . . . . . . . . . . . . . . . . 18
O il cons umption .......... .. .. .. .. . 228
P ressu re mal func tion ... ... .. .. .. .. .. 17
Recommended oil check intervals . ... . 229
Sensor defect ive . . . . . . . . . . . . . . . . . . . . 22
Specification and viscos ity .. .. .. .. .. . 227
E ng ine sound ............. .... .. .. . 10 2
Eng ine speed limitat io n ........ .. .... . 21
Engine start -stop mode
refer to Start-Stop-System . .. .. .. .. .. 83
E ng ine star t sys tem (indicator l igh ts) .. .. 18
Env ironment
Break- in period ........ ...... .... .. 203
Cata lytic converter ........... .... .. 204
D iese l par ticul ate fi lter .... .. .. .. .. . 205
Di sposing of yo ur vehicle ba ttery .. .. . 238
D riving a t high speeds .. ... .. .. .... . 206
D riving to minimize pollution and noise 205
Fu el . .... .. .. ... .. ..... ... .. .. ... 219
F ue l economy ............ .... .. ... 205
Leaks under your veh icle ... .. .. .. .. . 225
Lett ing the veh icle stand and warm up . 206
Proper disposal of dra ined brake flu id . 234
Inde x 303
Proper disposal of d rained eng ine cool -
ant . ... .. .. .. .... . ... ...... ... .. 232
Proper disposal of d rained eng ine
o il . . . . . . . . . . . . . . . . . . . . . . . . . 229, 230
Recycling used engine oil ............ 229
Un leaded fuel .. ... ................ 217
What should I do with an o ld battery? . 238
Event Data Recorder (EDR) . . . . . . . . . . . . 194
E xhaust tail pipes
Cleaning .. .. .. .. .. . .............. 213
Expansion tank .. ... ...... .......... 231
Exterior lighting ..... . .. .. ..... ... .. . 44
E xte rior m irrors
Adjus ting . .. .. .. .... ........... .. . 50
Di mming . ... .. .. .. .. .. ...... ... .. . 51
Heating ... .. .... ... .. .. ..... ... .. . 50
Exterior temperature display ........... 24
F
Fastening
Boos ter seats .. .. .. . .. .... .... .. .. 182
Co nvertib le child safety seats ........ 180
Infan t seats . . . . . . . . . . . . . . . . . . . . . . 179
Floor mats . . . . . . . . . . . . . . . . . . . . . . . . . 133
Foot peda ls ... .. .... . ... ...... ... .. 133
Fo r the sake of the environment
Gasoline fumes and t he env ironme nt .. 219
Red ucing engine noise by early upshift -
i ng ....... .. .. .. ... ............ ... 11
Ref ueling ... .... ... .. .. ..... ... .. 219
Saving f uel by early upshifting ... .. .. . 11
Fo ur- zone automatic climate control . .. . 72
Front airbags Descrip tion . . . . . . . . . . . . . . . . . . . . . . . 151
How they work . ......... ......... . 157
Frontal coll isions and the laws of physics 139
Fron t seats . . . . . . . . . . . . . . . . . . . . . . . . . 53
Adjus ting . .. .. .. .. ............... 13 0
Child rest rain ts in the front seat . ... .. 149
Fuel Additives .. .. .. .... .......... ..... 217
B lended gaso line . ............. .... 217
C u rrent cons umption .. ......... .... . 25
E conomy messages (eff icien cy program) 26
F uel fi ller flap emergency release ... .. 221
F uel fi ller neck ..... . .. .. ..... ... .. 219
Fuel gauge . . . . . . . . . . . . . . . . . . . . . . . . 12
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