brake sensor AUDI A5 COUPE 2010 Owners Manual

When a yellow warning symbol appears, one warning tone sounds.
A driver message appears as well to explain the malfunc tion in more
detail. The driver warning goes out after about 5 seconds, but it can
be brought up at any time by pressing the
!SE T) button again.
Check the function disp layed as soon as possible . The ye llow
symbol will not go out again until the reason for the malfunction has
been corrected.
If several priority 2 malfunctions are present, the symbols appear in
succession and remain for about 2 seconds .
Controls and equip­
ment
Dynamic steering*
Worn brake pads
Battery voltage
II Defective light bulb*
Check engine oil level
Engine oil sensor malfunction
Low fuel level
Windshield washer fluid
level low
Convenience key*
Key not in vehicle
Light/rain sensor* defective
Dynamic headlight range
control defective =>
page 33
=> page 34
=>
page 35
=> page 35
-
=> page 36
or => page 36
=> page36
=> page 35
=> page 35
=> page 34
=> page 34
=> page 36
Dr ive r informat ion di spl ay
II Battery in remote control key => page 39
-
Electromechanical => page 115
parking brake
-Engine speed limitation* => page 36
adaptive light * defective => page 36
Ignition lock malfunction => page 36
Adaptive dampers* => page 36
"Windshield wiper defective => page 37
-
Significant loss of air pres -=> page 307
sure*
Tire pressure monitoring syste
=> page 307
m* (malfunction)
[ i ] Tip s
The speed warnings warning threshold 1 '") and warning threshold
2 :,. are also yel low symbo ls in some models. The warning is always
shown as a small symbol in the upper area of the display
=> page 26. •
Applies t o veh ic les: w ith Audi dri ve sele ct
Dynamic steering
D yn a m ic s te er ing : Syste m malfun cti on
This driver message and the symbol appear when a system
malfunction occurs during travel. You can continue to drive care­
fully at a reduced speed to a qualified workshop. Steering can be .,_
I • •

Driver information display
more difficult or sensitive than usual. The steering wheel can also
be at an angle when driving straight.
Dynamic steering: initialization
If this driver message appears and the indicator light is flashing
on the instrument panel, dynamic steering is being reinitialized.
Once you start the engine after this is finished, the steering wheel
wi ll be easy to move. Re-initialization might be necessary if the
steering whee l was moved hard to the left and right while the
vehicle was not moving. The display goes out as soon as initializa­
tion is complete .
& WARNING
Have the dynamic steering system malfunction repaired as soon
as possible by an authorized Audi dealer or any qualified work­
shop -risk of accident!
[ i ] Tips
The dynamic steering stability systems are not available in the event
of a system malfunction. •
Applies to vehi cles: wit h conven ienc e key
Key not in vehicle
Key not in vehicle
This reminder appears along with the symbol if the master key is
removed from the vehicle with the engine running. It is intended to
remind you (e .g. when changing drivers) not to continue the journey
without the master key.
If the master key is no longer in the vehicle, you cannot switch off
the ignition after stopping the engine and you also cannot start the
engine again . You also cannot lock the vehicle from the outside .•
Ap plies to vehi cles : w it h li ght/ ra in sensor
Light /rain sensor defective C../1
...i-Automatic headlights /automatic wipers defective
If the symbo l il luminates, the light sensor has failed . For safety
reasons the low beams are turned on permanently with the switch
in
AUTO . However, you can continue to turn the lights on and off
using the light switch. In the case of a defect in the rain sensor, the
windshie ld wiper lever functions are still available. Have the
light/rain sensor checked as soon as possible by an authorized Audi
dea ler. •
Worn brake pads
Brake pads!
If the warning light illuminates, immediately contact your autho­
rized Audi dealer or qualified workshop to have all brake pads
inspected . On USA models the warning light 't comes on together
with the warning light
BRAKE . Both sets of brake pads on an axle must
a lways be replaced at the same time .
& WARNING
Driving with bad brakes can cause a collision and serious personal
injury.
• If the warning light and the warning lig ht
BRAKE1
l with the
message Brake pads! comes on in the instrument cluster display ,
immediately contact your authorized Audi dealer or qualified
workshop to have all brake pads checked or replaced if
necessary .•
1 1 BRAK£ : USA models only

-Adaptive cruise control .._ _ ______,:,.._ _______________________________________ _
Adaptive cruise control
Speed and distance control system
Applies to vehicles: with adaptive cruise contro l
Description
The adaptive cruise control driver assistance program is
a combined speed and distance control system.
Fig . 122 Front
bumper: Position of
radar sensor
Any speed between about 20 mph (30 km/h) and about 95 mph
(150 km/h) can be set and held with the adaptive cruise control. The
system also regulates a pre-set distance from the vehicle ahead
within the limits of the system described.
Driving can be more relaxed, particularly on long trips on interstates
or on other highways that are generally straight.
How does it work?
You can operate the adaptive cruise control using the lever on the
steering wheel column:::::,
page 121, "How is the speed stored?" and
~ page 123, "How is the distance (time interval) set?".
Driver information
Important information is brought up in the speedometer and in the
instrument cluster display as the vehicle is being driven
=:> page 124, "Driver information".
What is important for you to know
The adaptive cruise control is set with system -specified limits, that
is, as a driver, you will have to adjust the speed and distance to the
vehicle ahead in some instances~
page 128, "Driver intervention
prompt" and~
page 130, "System limitations".
& WARNING
Improper use of the adaptive cruise control can cause collisions,
other accidents and serious personal injury.
• Never drive at speeds that are too high for traffic, road and
weather conditions.
• Never follow the vehicle in front so closely that you cannot stop
your vehicle safely. The adaptive cruise control cannot brake the
vehicle safely when you follow another vehicle too closely. Always
remember that the adaptive cruise control has a braking power
that is only about 25% of the vehicle's maximum braking ability,
the automatic braking function cannot bring the vehicle to a stop.
• Never use adaptive cruise control on roads where you cannot
drive safely at a steady speed, including city, stop-and-go or heavy
traffic, on winding roads or when road conditions are poor (for
example, on ice, gravel , in fog, heavy rain or on wet roads that
increase the risk of hydroplaning).
• The radar sensor's
vision can be reduced by rain, snow and
heavy spray. This can result in vehicles driving ahead being inade­
quately detected or, in some circumstances, not detected at all. If
necessary, take action yourself! ..,

_______________________________________________ A_ d_ a ---=- p_t_ i_v _e_ c_ r_ u_ i_ s _e_ c_ o_ n_t_ r _o _ l __ llll
& WARNING (continued)
• Always turn off adaptive cruise control when entering turn
lanes, highway exit lanes and construction zones or similar situa­
tions because the vehicle will automatically accelerate to the
stored speed.
• Never rest your foot on the accelerator pedal, especially when
the adaptive cruise control is being used because doing so will override the braking function and prevent the brakes from being
applied by the system when it detects a situation when the brakes
must be applied.
• Always remember that the adaptive cruise control has limits -
it does not react when you drive towards an obstacle or some­
thing else on or near the road that is not moving, such as vehicles stopped in a traffic jam, a stalled or disabled vehicle.
• Always remember that the adaptive cruise control cannot
detect a vehicle that is driving towards you in your traffic lane and
that it cannot detect narrow vehicles such as motorcycles and
bicycles .
[ i] Tips
• For safety reasons, the stored speed is deleted when the ignition
is turned off.
• The Electronic Stabilization Program (ESP) and the Anti -Slip
Regulation (ASR) cannot be deactivated when the adaptive cruise
control is switched on. If the ESP and the Anti -Slip Regulation (ASR)
has been deactivated and you then switch on the adaptive cruise
control, the ESP function will also be activated automatically.
• Damage caused by accidents (e.g. if the vehicle is damaged
when parking) can affect the radar sensor settings. This can cause
the system to malfunction or switch off completely.
• The radar sensor cover is heated. In winter conditions, you
should still check before driving to make sure it is free of ice and
snow. If necessary, clean the area near the radar sensor carefully
=>
page 118, fig. 122.
Controls and equip ­
ment
• To ensure that the radar sensor is not blocked, foreign objects
(e.g. stickers, add -on parts) must not cover the area near the radar
sensor=>
page 118, fig. 122. The area near the radar sensor must
not be painted, either.
• For Declaration of Compliance to United States FCC and Industry
Canada regulations =>
page 342. •
Applies to vehic les : with adaptive crui se cont rol
How does adaptive cruise control work?
Vehicles traveling ahead are detected with the aid of a
radar sensor.
I==;.===============-. ~
~
ll!
Fig. 123 Radar sensor
measurement range
A radar sensor is built into the front of the vehicle=> fig. 123, which
is subject to certain system limits=>
page 130. Stationary objects
are not taken into consideration. The system is intended to measure
the distance to reflective surfaces. The system responds after the
distance measurement has taken place. If a measurement is not
possible, the system does not respond.
Open road
When the road is clear, the adaptive cruise control works like cruise
control. It maintains a constant target speed specified by the driver .~
I • •

_____________________________________________ A_d_ a __,_ p_t_iv _ e_ c_r _u _is _ e_ c _ o_n_ t_ r_ o _ l __ !II
Ap plies to vehic les: with adapt ive cruise cont rol
System status indicator
The text messages and symbols shown in this area of the
display are not displayed perm anently.
T ime in ter va ls (s uch a s c::;, __ __ c::;, }
Fig . 132 System
sta tus i ndicator
The different symbols for the time intervals appear if you change the
settings ::::> fig. 132 .
The text message ... (three whi te dots) appears if a setting cannot be
implemented with the operating lever . The following are possib le
reasons :
• If you pull the control lever towards you to resume speed but no
requested speed was set .
• If you push the lever up to increase (or down to reduce) speed
when no speed has been set previously .
• I f you push the lever up to increase (or down to reduce) speed
and this speed is outside the range from 20 to 95 mph (Canada
models : 30 to 150 km/h) .
ACC functi onal it y limited
The text message ACC fun ctio na lit y lim ited appears when the ACC
system does not detect any objects over an extended time period.
For the time being, the distance to vehicles up ahead is not being
Controls and equip ­
ment
controlled . The ACC system is not switched off, so increased alert­
ness is required. The following may be reasons for the text message
ACC Functiona lly limited:
• The ACC sensor is dirty. The ACC system is not reacting, or is not
react ing correctly, to veh ic les traveling ahead.
• I t is possible that you are driving on a road with very light traffic
without anything at the side of the road (e.g. guard rai ls, traffic
signs, trees). As soon as a vehicle is detected by the system again,
it returns to its control range and the text message disappears .
The ACC sensor is located in the right front trim grille::::>
page 118,
fig. 122 . If there is a loss of operation due to heavy contamination,
this area should cleaned to restore proper operation .
ACC not available
The text message ACC not available appears , for example, if the
temperature of the brakes is excessive. Adaptive cruise control is
temporarily not availab le . A warning tone sounds as a reminder .
ACC not a vailable !
The text message ACC not ava ila ble! appears in the event of a
malfunction . Adaptive cru ise control is turned off . A warning tone
sounds as a reminder. Have the system inspected by a qua lified
dea lership .
ACC sensor blo cked !
The text message ACC s ensor blocked ! appears when the ACC
system can no longer guarantee safe detection of objects. Adaptive
cruise control is turned off . A warning tone sounds as a reminder.
To decide whether it is necessary to switch off the ACC (ACC sensor
b locked
!) or if it is only a temporary condition (ACC F unctionally
limited), the system wi ll a lso takes into consideration the outside
temperature and/or the windshield wiper operation.
The ACC senso r is dirty or b locked (e .g . leaves, snow).
The sensor should be cleaned to restore proper sensor function
::::>
page 118, fig. 122 .
I • •

• ..__A_ d_ a-'- p_t _iv _ e_ c_r _u _ i_s _e _ c_o_ n_t _r _o _l _____________________________________________ _
System limitations
Applies to veh icles: wi th a dapt ive cruise contro l
General information
Some driving situations which affect the function of the
radar sensor are described below.
When driving, the adaptive cruise con tro l is g overned by physical
and system -specified limits . Also, under certain circumstances, the
ACC system may react unexpectedly or late from the driver's point
of view. Therefore, always be attentive and intervene, if necessary:
• when driv ing around curves =>
page 130
• when vehicles in front are not in line with your vehicle
=>
page 131
• when other vehic les are changing lanes=> page 131
• when o ther vehicles a re di fficu lt to detec t=> pag e 131.
& WARNING
The radar sensor's vision can be reduced by rain, snow and heavy
spray . Th is can result in vehicles driv ing ahead being in adequate ly
detected or, in some circumstances, not detected at all. If ne ces ­
sary , take a ction yourself! •
Applies to vehi cles : w it h ad aptive crui se co ntrol
When driving around curves
k::;== ========= =,!
~
[J
Entering a curve
Fig. 13 5 Ve hicle
en teri ng a curv e
Fig . 13 6 Vehicle
le aving a curv e
When entering a curve , the adapt ive cruise control may react to a
vehicle in the next lane and apply the brakes in your vehicle
=> fig. 135. The braki ng act ion can be overridde n by depressing t he
acce lerator pedal.
Lea ving a curve
At the exit from very long curves the predictive lane reading can
cause the adaptive cru ise control to react to another vehicle in the
next lane and apply the brakes in your ve hicle => fig . 136. The
braking actio n can be overr idden by dep ressing the acce lerator
p edal. •

-Adaptive
cruise contro l "----'-----------------
Fig. 141 Sheering o ut
and stationary vehicle
If a vehicle that has been detected by the ACC system turns off or
sheers out, and there is a stationary vehicle ahead of that vehicle,
the ACC system does not respond to the stationary vehicle
~ page 131, fig. 140 and~ fig. 141. •
Audi braking guard
Applies to vehicl es: wi th a dapt ive c ruise co ntrol
Description
Audi braking guard warns you of a threatening collision
with a vehicle ahead .
Fig. 142 Display in the
instrument cluster
The Audi braking guard is active from a speed of approx. 20 mph
(30 km /h) and works within the system limits~
page 130even when
the adaptive cruise control is deactivated .
A radar sensor is built into the front of the vehicle~
page 118,
fig. 122. The system is intended to measure the distance to reflec­
tive surfaces. If a measurement is not possible, the system does not
respond.
When the measurement has taken place, the system can assess a hazardous situation, when a vehicle ahead suddenly brakes or when
your own vehicle is driving at high speed towards a much slower
vehicle ahead. As soon as the system assumes that a possible colli ­
sion with the vehicle ahead can only be avo ided by immediate all­
out braking or by an avoiding maneuver, a warning appears.
The system has a pre-set response time to be able to warn in good
time. This system response time is automatically reduced if you acce lerate actively, for example to join a highway. Braking, trans ­
verse acceleration and the steering angle can lead to a reduced
system response time. The warning is deactivated if you begin to
overtake with full acceleration .
The system draws your attention to two different hazardous situa ­
tions:
Distance
The distance warning is issued in the event of inadequate distance
to the vehicle ahead a period of more than 5 seconds . If the distance
is less than 30 feet (9 meters) at 50 mph (80 km/h), for example, an
optical display is faded in on the instrument cluster~ fig. 142.
If the vehicle ahead brakes sharply, a collision cannot be avoided,
even in the case of an immediate response. In this case , increase the
distance to the vehicle ahead.
Speed
If there is a much slower vehicle ahead in your lane, or if the vehicle
ahead brakes sharply, the Audi braking guard calculates the point
from which a collision can only be avoided by all -out braking or by
~

_______________________________________________ A_ d_ a.!.p _ t:.:. i_v _e___; c_ r_ u_ i_ s _ e_ c:.:. o.::..:.. n:.:.t:.:. r..:o :.:. l __ ftllll
an avoidin g maneuver. If a warni ng does sound, a possibl e col lis ion
w ith th e vehicle in fro nt can b e avo id ed thr ough a n evas ive
maneuve r or by brakin g.
T he warning is given in two stages:
• Pre-warning: A n op tica l disp lay a pp ea rs in th e in str umen t clus te r
and a warn ing tone sounds.
• Acute warning : If you do not respon d to t he pr e-war nin g, the
second stage, the acute warning, is iss ued. A brake jo lt rem inds yo u
t o conc entrat e on the road again.
U nde r heavy breakin g, brak e assist=>
page 239 also he lps you
obtain maxi mum braking efficie ncy.
& WARNING
Always pay attention to traffic , even when the Audi braking guard
is switched on . You are always responsible for your speed and the
distance between your vehicle and other vehicles .
• Always keep the legally stipulated safety distance between
your vehicle and the vehicle ahead -danger of accident!
• The Audi brak ing guard does not respond outside the system
limits , for example if you approach a stationary obstacle (end of a
traff ic jam or breakdown vehicle ).
• Please observe that the Audi braking guard is subject to restric ­
tions in narrow bends due to the field of vision of the radar sensor.
This may possibly lead to obstacles not being detected.
• The radar sensor's
vision can be reduced by rain , snow and
heavy spray. This can result in vehicles driving ahead being inade ­
quately detected or , in some circumstances , not detected at all .
Always watch where you are driving.
• Reflecting objects such as e .g . crash barriers or the entrance to
a tunnel may impair the function of the radar sensor . •
Controls and equip ­
ment
Ap plies to veh ic les: with a daptive c ruise control
Settings in the MMI
The sett in gs of the Audi braking gu ard a re per for med in
the
MM /*.
Fig. 14 3 MM I-Display :
Audi braking gua rd
S ettings rega rdin g th e sys te m an d the e arly wa rnin g ca n be
a djust ed to th e r espec tive u ser and saved in t he
MMI *.
Switching the system on and off
Press the(CA R]fu nction bu tton.
S elect Audi braking guard . Th e Audi braking guard menu
a ppe ars ==> fig. 143.
Sel ect System On to switc h th e sy stem on or Off to
s w itch the s ystem off.
Switching the early warning on and off
Press the I CA R I functi on bu tton.
Selec t Audi braking guard . T he Audi braking guard menu
a ppe ars.
- Select Early warning On to swi tch the aco usti c and
op tic al warni ng on or
Off to swi tc h the sy s tem off.
I • •

The system operates across the entire speed range in combination
with the ABS system. If the Anti -Lock Brake System (ABS) ma lfunc­
tions, the ESP wil l also shut down .
How the system works
The Anti -Lock Brake System (ABS), Electronic Differential Lock (EDU
and the Anti -Slip Regulation System (ASR) are integrated in the elec­
tronic stabilization program. In addition to the data provided by
th ese functions, the ESP control unit requires additional measure ­
ment data provided by high performance sensors . The rotational
speed of the vehicle about its vertica l axis, vehicle acceleration in
the fore-and-aft and lateral directions , the brake pressure, and the
steering angle are all measured.
The direction in which the driver wishes to travel is determined with
the aid of the steering angle and vehicle speed and is continua lly
compared with the actual behavior of the vehicle. If the two do not
match, for example, when the vehicle starts hydrop laning on a wet
road, ESP will automatically brake the appropriate whee l to correct
the prob lem.
The vehicle is then stabi lized by the forces acting on the whee l
during braking. If the vehicle is
oversteering (the vehicle turns too
sharply and the rear wheels slide toward th e ou tside of a curve), the
brakes are main ly app lied on the wheel that is on the outside of the
curve . In the case of a vehicle that is
understeering (the vehicle does
not turn sharply enough and pushes out of a curve), the brakes are
applied as needed on the wheel that is on the inside of the curve or
additional ly on the other wheels. An acoustic signal indicates when
ESP brake app lication cuts in=>&.
T he system operates across the entire speed range in combination
with the ABS system =>
page 238. If the Anti-Lock Brake System
(ABS) malfunctions, the ESP will be out of action as well.
Activating
When you turn on the engine, ESP will automatica lly be activated
and will perform a se lf-test. As soon as the test is comp leted, the
system is in norma l operating mode.
Controls and equip­
ment Safety first Vehicle operation
Intelligent technology
You
can activate a deactivated ESP or deactivated ESP/ASR if
required by pressing the::::>
page 234, fig. 215 ::::> page 234, fig. 214
button . When they are activated, the message
ESP /ASR on appears
briefly in the display .
Deactivating
The ESP should normally be activated al l the time. If necessary, you
can deactivate Anti -Slip Regu lation (ASR) or the Electronic Stabiliza­
tion Program (ESP) by pressing the button=>
page 234, fig. 215.
• Deactivating ASR: Tap the button . In certain exceptional situa­
tions (e .g. driving with tire chains), the Anti-Slip Regulation (ASR)
can be deactivated =>
page 236. The message ASR off appears in the
display as we ll.
• Deact ivating ESP/ASR Press the button for more than 3 seconds.
With the ESP/ASR deactivated, the indicator light comes on, see
=>
page 13. The message ESP switched off appears in the disp lay as
we ll.
& WARNING
The Electronic Stabilization Program is nevertheless subject to the
laws of physics . It is particularly important to pay attention to this
fact on wet and slippery roads. It is therefore important that you
always adapt your driving to the condition of the road and traffic
conditions. Do not allow the increased safety provided by the Elec­
tronic Stabilization Program system to lull you into accepting
additional safety risks. •
Electronic differential lock (EDL)
---------
The electronic differential lock monitors the rotational
speed of the drive wheels.
General notes
The electronic differential lock (EDU helps the car to start moving,
acc elerate and c limb a gradient on surfaces providing poor or
Vehicle care Do-it-yourself service Technical data

ll}JI Intelligent technology
---""'------------ ....::....:...:~---------------------------
almost no grip. Without EDL, this would be difficult, if not impos­
sible.
How the system works
The EDL operates automatically. It monitors the rotational speed of
wheels with the help of the ABS sensors=:,
page 238 . If a noticeable
slip is detected at the wheels (e.g. on slippery ground on one side),
the spinning wheels are braked and power is transferred to the
other wheels. This is done up to a speed of about 60 mph (100 km/h).
Noises from the brake system signal that wheel spin is being
controlled.
Driving off
When driving off, always be sure to keep road conditions in mind as
you accelerate. If one drive wheel spins because it is on a surface
with less grip, apply
plenty of throttle until the car starts to move.
Overheating of brakes
To prevent the disc brake of the braked wheel from overheating if
subjected to excessive loads on this wheel, the EDL cuts out tempo­ rarily. The vehicle remains operational and behaves in the same way
as a vehicle without EDL.
As soon as the brake has cooled down, EDL switches on again auto ­
matically.
& WARNING
• When accelerating on slippery surfaces, such as on ice or snow,
always be careful when depressing the accelerator pedal. Even
with the EDL working, the drive wheels can spin and reduce your ability to control your car. Risk of crash!
• The increased safety afforded by EDL does not mean that you
can take safety risks. Always adapt your driving style to the road
conditions and traffic situation.
[ i] Tips
If a fault occurs in the ABS, the EDL is also not functioning . This is
indicated by the ABS warning light=:,
page 15. •
Anti-Slip Regulation System (ASR)
The Anti-Slip Regulation System prevents the driven
wheels from spinning when the car is accelerating.
General notes
The Anti-Slip Regulation System (ASR) is integrated in the electronic
stabilization program (ESP) . When the vehicle starts up and acceler ­
ates, the wheels are prevented from spinning by adjusting the
engine power to match the amount of grip available from the road
surface.
How the system works
ASR performs automatically , i.e. without the driver's intervention .
With the aid of the ABS sensors=:,
page 238, ASR monitors the
speed of the driven wheels. If the wheels start to spin, engine torque
is reduced automatically until the tires find enough grip to lock onto
the road surface. The system is active across the entire speed range.
The ASR works in conjunction with the ABS. If a malfunction should
occur in the ABS, the ASR will also be out of action.
Activating
The ESP is automatically activated when the engine is started and it
performs a self-test . You can activate a deactivated ASR if required
by pressing the=:,
page 234, fig. 215 button. When it is activated,
the message
ESP/ASR on appears briefly in the display.
Deactivating
You can deactivate the ASR if required by pressing the button (for
less than 3 seconds) =:,
page 234, fig. 215. With the ASR deactivated,
the ESP check light comes on, see=:,
page 13. The message ASR off ._