2018 AUDI A5 COUPE brakes

Assistance systems
In a speed range under 40 mph (65 km/h), traffic
jam assist can help to keep the vehicle within a
lane calculated by the system. Within the limits
of the system, the system controls the steering
automatically when adaptive cruise control is
switched on . Since traffic jam assist is only an as­
sist system, the driver must always keep his or
her hands on the steering wheel and be ready to
steer. The driver can override the control at any
time by actively steering.
The system is designed for driving on express­
ways and highways.
Switching traffic jam assist on and off
.., Press the button to switch the system on and
off¢fig. 123.
.., To turn the system off completely, select in the
Infotainment system:
I M ENU I button > Vehicle
> left contro l button > Driver assistance > Traf­
fic jam assist.
If traffic jam assist was deactivated through the
Infotainment system, you can cont inue operating
the active lane assist using the
c::> fig . 123 button
c::> page 131. T he traffic jam assist functions a re
no longer available.
Requirements for using traffic jam assist:
- Traffic jam assist must be switched on in the
Infota inment system.
- Adaptive cruise control must be switched on
and active
c;> page 115 .
Always switch off traffic jam assist in the
following situations:
- When increased attention is needed from the
driver .
- In poor weather conditions such as snow or
heavy rain .
- When driving on roads in poor condition.
- In construction zones.
- In city driving.
Traffic jam assist availability:
If you are in the Driver assistance disp lay in the
i n strument cluster,
the@ indicat or light and
the message
Traffic jam assist available appea rs
if traffic congestion situation was recognized.
You can open the
D rive r assistance disp lay using
122
the multifunction steering wheel buttons
¢ page 13. To activate traffic jam assist, you
must press the
c;> fig. 123 button and switch on
the adapt ive cruise control
¢ page 115.
Indicator lights
Ill and. -traff ic jam assist is switched on.
Vehicles driving ahead were detected. Your vehi ­
cle adapts whi le driving
c;> fig. 124.
• - Traffic jam assist switches off if the driver
does not take over steering after multiple driver
intervention requests. The system brakes the ve­
hicle until it is stationary.
A WARNING
A lways keep your hands on the steering wheel
so you can be ready to steer at any t ime . The
driver is always respons ible for staying in a
lane and for assessing traffic situations . Read
and follow the warnings on
c;> .& in General
information on page 114.
Never use traffic
jam ass ist in the following situations or you
will increase the risk of an accident.
- Driving offroad or on unpaved roads. Traffic
jam assist is only designed for use on paved
roads.
- In city driv ing or in construction zones.
- On curv ing stretches of road.
- In narrow lanes.
- In unclear traffic situat ions such as at inter-
sections or toll stations.
(D Tips
You are not necessarily guided to the center
of your lane.

<( a, .... N ,....
N .... 0 \0
3 a,
This message appears if you would like to switch
the system on and there is a stationary object di­
rectly in front of your vehicle .
Door open
The system is not ava ilable when the door is
open.
Audi pre sense
Introduction
App lies to: vehicles with Audi pre sense
Within the limits of the system, the pre sense
functions can initiate measures in particularly
dangerous situations to protect the vehicle pas­
sengers and other road users.
- Due to the interlinking of various vehicle sys­
tems, critical driving situations can be detected by
pre sense basic and measures for preventa ­
t ive occupant protection are can be initiated .
- The
pre sense front system uses the data from
the adaptive cruise control* radar sensors and
the camera to calculate the probability of a col­
li sion. Within the limits of
the system, an im­
pending collision with vehicles can be detected
in both urban and rural speed ranges. In this
case, the system warns the driver visually,
acoustically and with a jerk on the brakes if nec­
essary. If needed, it can initiat e a partial or full
deceleration to reduce the collision speed or to
avoid the collision under certain circumstances .
I n conjunction with pre sense basic/rear, the
front safety belts are also revers ibly tensioned
when needed . The pre sense front is also active
when adapt ive cruise control* is switched off .
-Pre sense rear contains pre sense basic func­
tions. It uses the data from the side assist* ra­
dar sensors and calcu lates withi n the limits of
the system the probability of a rear end coll i­
sion with the vehicle beh ind you. Pre sense rear
is also active when side assist* is switched
off.
- Within the limits of the system, pre sense city
uses the camera data and can detect an im­
pending collision with vehicles and pedestrians.
In this case, the system warns the dr iver visual­
ly, acoustically and with a jerk on the brakes if
necessary. If needed, it can initiate a full decel­
eration to reduce the collision speed or to avoid
Assistance systems
the collision under certain circumstances. In
conjunction with pre sense basic/rear, the front
safety belts are a lso reversibly tens ioned when
needed .
A WARNING
Read the genera l information in c:>&. in Gen­
eral information on page 114,
c:> &. in Gener­
al information on page 135.
(D Tips
- Certain pre sense functions switch off when driving in reverse.
- The pre sense functions may not be availa­ ble if there is a malfunction in the ESC sys­
tem or the airbag control module.
- Note that the reversible belt tensioner on
the front passenger's side deactivates when
the front passenger's airbag is deactivated .
- Switch the pre sense
off when you a re not
using public streets or when loading the ve­
hicle onto a vehicle carrier, tra in, sh ip or
other type of transportat ion. This can pre­
vent an undesired inte rvention from
the pre
sense system.
Audi pre sense basic
Description
Applies to : vehicles with Audi pre sense basic
The pre sense basic functions are activated at a
speed of approx imately 20 mph (30 km/h) or
higher .
The following functions can be triggered under certain conditions within the limits of the sys­
tem:
- Tensioning of the safety belts (for examp le,
during heavy braking): the front safety belts have reversible belt tensioners . If a collision
does not occur, the safety belts loosen slightly
and are ready to trigger aga in .
- Closing the windows and sunroof* .
-
125

Assistance systems
-Activating the emergency flashers l) .
The message Audi pre sense. ¢ page 126,
fig. 12 6 will wa rn you abo ut the danger.
Aud i d rive select *: the t rigger t imes are adjusted
dependi ng on the mode selected.
Audi pre sense front
Description
A ppl ies to: ve hicles w ith Audi a daptive cruise co ntrol
W ith in the limits of the system, pre sense front
can warn you of impending coll is ions and initiate
t he corresponding brak ing maneuvers or the sup­
port ing measures when avo iding a collision .
I f detected in time, the system can rank the dan­
ge rous situation as cr itical if a ve hicle driving
a head brakes s udden ly, if your own vehicle is ap­
p roaching a s ignificantly s lower vehicle at high
speed or when there is an oncom ing vehicle d ur­
i n g a t urning maneuve r.
If detection is not poss ible , the n pre sense front
does not react .
Warnings
App lies to: ve hicles w ith Audi a daptive cruise co ntro l
F ig . 126 In strum ent cl uste r: appro ach warn ing
General information
The system recognizes var ious dangerous situa ­
tions. The
early warning occurs if:
-a veh icle d riving ahead brakes s uddenly,
- yo ur own vehicle ap pro aches a signific antly
s lower vehicle o r stationary ve hicle in the direc­
tion o f travel.
l) Thi s is not a va ilab le in some co untri es .
126
When this warn ing occurs, i t may o nly be pos si­
ble to avo id a co llision by swerving o r braking
strongly . T he message
Audi pre sense.
¢ fig. 126 and a wa rning tone will warn you
about the danger .
If you do not react enough or not at all to a dan ­
gerous s ituat ion that was detected by the sys­
tem, pre sense front provides assistance by ap­ plying the b rakes.
If a collision is imminent, the system will fi rst
provide an
acute warning by b raking sharply . You
will a lso warned by an indicato r in the instrument
cluster
disp lay¢ fig. 126. If yo u do not react to
the acute warning, pre se nse front can bra ke w it h
i nc reas ing force wi thin the lim its o f th e
system
1> . Thi s reduc es the v ehicl e spe ed in t he
even t of a collision . At low vehicle s peeds , pre
s ense fr on t can initi ate a com plete dece le rat ion
sho rtly befo re a collision with a veh icle dr iv ing
ahead
l ) . If pre sense front determines that you
a re not b raking st rongly enough when a co llision
i s imminent, it can increase t he b raking force.
The followi ng func tions trigge r in conjunc tion
with pre sense basic/ rear at corresponding vehi ­
cl e speeds :
-Reversible tens io nin g of the front s afety bel ts.
-Clos ing t he windows and sun roof* .
-Infla ting t he side bols ters* on the seat back-
rest .
Audi drive select* : depending on the mode se ­
l ected , the reversible belt tensioner, the closing
of the windows and s unroof*, and the inflating of
t h e side bolste rs* on the seat backrest may not
be active.
Evasive steering support
Evas ive steering s upport helps you to steer the
vehicle around an obstacle in a crit ica l sit uat io n.
If you avo id a n obs tacle afte r the acu te warning,
t he n th e evasive ste ering suppo rt assists you by
applying slight stee ring adjus tment to corre ct
.,..

Assistance systems
CJ) Note
The radar sensors can be displaced by impacts
or damage to the bumper, wheel housing and
underbody. Pre sense rear can be impaired by
this. Have an authorized Audi dealer or au­
thorized Audi Service Fac ility check their func­
tion.
(D Tips
- The pre sense rear functions switch off
when towing a trailer.
- The pre sense rear functions may also
switch off if there is a malfunction in the
side assist* system.
Audi pre sense city
Description
A ppl ie s to: ve hicles w ith Aud i p re se nse c ity
Within the limits of the system, pre sense city
can warn you of impending collisions with
vehicles and pedestrians and initiate the applica­
ble braking maneuver if needed. Pre sense city is
active at speeds of approximately 6 mph (10 km/ h) and higher .
A pedestrian warning can occur at speeds up to
SO mph (85 km/h), and vehicle warnings can oc­
cur at speeds up to 155 mph (250 km/h). A pre
sense city braking maneuver is poss ible at speeds
up to SO mph (85 km/h).
Warnings
A ppl ies to: ve hicles w ith Aud i p re sense c ity
The system recognizes various dangerous situa­
tions. The
early warning occurs if:
- a veh icle driving ahead brakes suddenly,
- your own vehicle approaches a significantly
slower vehicle or stationary vehicle in the direc­
tion of travel.
- a pedestrian is standing in the lane or is moving
into the lane .
When this warning occurs, it may only be possi­
ble to avoid a collision by swerving or braking
strongly . The message
Audi pre sense.
128
¢ page 126, fig. 126 and a warning tone will
warn you about the danger.
Additionally, a jerk on the brakes may occur as an
acute warning when there is an impending colli­
sion . If you do not react to the acute warning, pre
sense city can brake to the point of complete de­
ce leration within the limits of the system . This
reduces the vehicle speed in the event of a colli­
sion. The message
Audi pre sense. also ap­
pears.
The following functions are triggered in conjunc­
tion with pre sense basic/rear :
- Reversible tensioning of the front safety belts.
- Closing the windows and sunroof* .
- Inflating the s ide bolsters* on the seat back-
rest.
Audi drive select*: the function is not active de ­
pending on the mode selected .
&_ WARNING
- Pre sense city cannot overcome the laws of
phys ics.
It is a system designed to assist and
it cannot prevent a collision in every circum­
stance. The driver must always intervene.
The driver is always responsible for braking
at the correct time. Do not let the increased
safety provided tempt you into taking risks .
This could increase your risk of a collision.
-The system can dep loy incorrectly due to
system-specific limits.
-To reduce the risk of an accident, please
note that the camera does not always detect
every object.
-Pre sense city does not react to animals,
crossing or oncoming vehicles, objects such
as bars, railings or railcars, and objects that
are difficult to detect
c:> &. in General infor­
mation on page 114.
-In trailer mode, the braking behavior of the
trailer can be d ifferent than usual during au­
tomatic braking.
&_ WARNING
Pre sense city may be restr icted or not ava ila­
b le in the following example situations:
- in heavy fog, rain, spray or snow

-The display brightness for the exit warning
system cannot be adjusted.
-The system is not available when towing a
trailer.
Rear cross-traffic assist
A ppl ies to: ve hicles with rear c ross-tra ffic ass ist
F ig. 137 Example display
Fig. 138 Infotai nme nt system : rea r cross-t raffic ass ist dis­
p lay
The rear cross-traffic assist can warn the driver of
a po tential collis ion with approaching cross-traf­
fic when driving in reverse . Within its limits, the
system monitors the areas behind and next to
the vehicle using the radar sensors when leaving
a parking space
c:;, page 134, fig. 134. Moving ob­
jects that are approaching, such as cars, are de· tected
c:;, fig . 137 .
If the system detects critical cross traffic when
backing out of a parking space, it will react as fol­
l ows:
-Vi su al indicator : an indicator appears in the In·
fotainment system display with a red arrow
symbol. The arrow points in the direction from
which the object is approach ing
c:;, fig. 138.
~ - Aud ibl e w arning signal : a continuous tone may
sound as an add itional indicator when driving in
reverse.
A ss is ta nce syst ems
-Automat ic brak e acti vation : a brief activation
of the brakes may also warn you of a potential
col lision with an approaching object .
Requirements for using the rear cross -traffic
a ssi st :
-The parking aid m ust be switched on
r=;, page 141.
-Reve rse gear must be engaged.
-The speed must not be h igher than approx i-
mately 9 mph (15 km/h).
_& WARNING
-The rear cross -traffic assist is an assist sys­
tem and cannot prevent a co llision by itself .
The driver must always intervene. The driver is always respons ible for braking at the cor·
rect time.
-Please note that the rear cross-traff ic assist
may activate the brakes unexpected ly. Se­
cure any cargo that you are transporting to reduce the risk of damage or injury .
-An addit iona l brake activation may be trig­
gered w ith in 20 seconds after an automatic
brake activation .
-If there is an acoustic warn ing signal from
the rear c ross-traffic assist, then the park­
ing system may not warn you of detected
obstacles under certain circumstances.
-The v iew of the radar sensors may be im­
pa ired by leaves, snow, heavy sp ray o r dirt .
Clea n the area i n front of the sensors
¢page 134, fig. 134.
.8_ WARNING
The rear cross -traffi c assist is subjec t to limi­
tations and cannot warn yo u before every im­
pending coll ision:
-If the ve hicle is too wide for the par king
space and covered by the neighboring
vehicles.
-P eop le, such as cycl ists, joggers, inline skat ­
ers and pedestrians, may not be detected
under certain circumstances.
-I f you are in a parallel parking space or d iag ­
onal parking space .
137

Intelligent Technology Electronic stabilization
control (ESC)
Description
Ele ctronic stabilization control (ESC) supports
driver safety . It reduces the risk of slipping and
improves d riving stability. ESC detects critica l sit ­
uations such as when the vehicle is oversteering
and understeering or the wheels are spinn ing.
T he vehicle is stabilized by applying the brakes or
reducing eng ine torq ue. When the ESC engages,
the
J;,j ind icator light blinks in the instrument
cluste r.
T he follow ing systems are integrated in the ESC:
Ant i-loc k bra king s ystem (ABS)
ABS prevents the whee ls from locking when brak­
ing. The vehicle can still be steered even during
hard brak ing. Apply steady pressure to the brake
pedal. Do not pump the pedal. A pulsing in the
b rake pedal indicates that the system is act ing to
stabilize the vehicle .
Br ake a ssist s ystem
The brake assist system can decrease braking dis­
tance. It increases brak ing power when the driver
presses the brake pedal quickly in emergency sit­
uations . You must press and hold the brake pedal
unti l the dangerous sit uat io n is ove r. In veh icles
with adaptive cr uise contro l*, the bra ke assist
system is more sensitive if t he d istance detec ted
to the veh icle dr iv ing ahead is too small.
Anti-Slip Regulation (ASR )
ASR red uces eng ine power when the drive wheels
begin spinning and adapts the force to the road
conditions . This makes it easie r to sta rt, acceler­
ate and dr ive up hill s.
Electronic differenti al lock (EDL )
EDL applies the brakes to a wheel that starts
spi nning and t ransfers t he drive powe r to the
;;§ other driving wheels. This f unct ion is not availa-....
~ b lea t higher speeds.
N .... 0 \0
3 Intellig ent Technology
In extreme cases , ED L automat ica lly switches off
to keep the brake o n the braked wheel from over­
heating. The veh icle is still working correct ly. ED L
will switch on again automatically when condi­
tions have returned to normal.
Ste ering recommendation
The ESC he lps to stabilize the vehicle by changing
the steering torque.
In veh icles wi th dynamic steer ing*, ESC also
helps to stab ilize the steer ing in crit ica l sit ua ­
tions.
Selective wheel torque control
Se lective w heel to rque con trol is used w hen d riv­
i ng on curves. Bra king is targeted towa rd t he
whee ls on the inside of the cu rve as needed. This
allows mo re precise driving in curves .
Automatic post -collision braking system
The "automat ic post-collision braking system "
can help to reduce the risk of sliding and of addi­
tiona l co llisions after an acciden t. If the a irbag
contro l
module detects a co llision, the veh icle is
braked by the ESC.
T he veh icle does not bra ke automatically if:
- the dr iver presses the acce lerator pedal, or
- the ESC, the brake system or the veh icle elect ri-
cal system are not functioning.
A WARNING
=
- The ESC and its integrated systems cannot
overcome the lim its imposed by natural
phys ica l laws. This is especially important
on slippery or wet roads. If the systems be­
gin acting to s tabilize yo ur vehicle, you
should immediately alter your speed to
match the road and traffic conditions. Do
not let the inc reased safety provided tempt
you into taking risks. This could increase
your r isk of a coll is ion.
- Please note the ris k of a collis ion increases
when dr iv ing fast, especially through curves
and on slippery or wet roads, and when dr iv-
ing too close to objects ahead . The ESC and
~
151

<( a, .... N ,....
N .... 0 \0
3 a,
A WARNING
You should only switch sport mode on or switch ESC/ASR off if your driving abilities
and road conditions permit .
- The stabilization function is limited when
sport mode is sw itched on . T he driving
wheels co uld spin and the vehicle cou ld
swerve, espec ially on s lick o r sli ppery roa d
surf aces.
- T here is no vehicle stabilization when ESC/
ASR a re swi tched off .
Brakes
New brake pads
New brake pads do not ac hieve the ir full b raking
effect during the first 250 mi (400 km) . They
must be "broken
in " fi rst . However, you can com­
pensate for the slightly reduced bra king fo rce by
pr ess ing firmly o n the bra ke pe dal. Avoid heavy
b ra king dur ing t he b reak -in per io d .
Wear
Brake pad wear depends largely o n the way the
ve hicl e is driven and on operat ing cond it ions .
This is especially t rue if you are d riving freque ntly
in t he c ity and on curves o r wi th a sporty driving
s tyle.
Operating noise
Noises may occur when braking depend ing o n the
speed , braking force and ou ts ide cond it ions such
as te m pe ra ture and humi dity .
Wet conditions or road salt
In certain situations, for example after driving
through water, in heavy ra in or after washing
your car, the braking ef fect may be reduced due
to mo isture or ice on the b rake roto rs and b rake
pads. The b rakes mus t be
"dried" firs t wi th a few
care ful bra ke app lic at ions.
At higher speeds and with t he windsh ie ld wipers
turned o n, the brake pads press against the bra ke
rotors for a s ho rt amoun t of time. This ac tion,
whi ch is not felt by the driver , happens at regul ar
i nte rvals an d ens ures a better reac tion time fo r
the brakes in wet weat her.
Intellig ent Technology
The brak ing effec t can a lso be reduced if yo u are
driving on salted roads and yo u do not app ly the
bra kes for long per iods o f time. The layer of sa lt
on the brake rotors and pads m ust be worn off
first whe n the brakes are applied .
Corrosion
Leaving t he vehi cle pa rked for long periods o f
time, low mileage and avoiding heavy b raking
can contrib ute to corros ion on the b rake roto rs
and to dirty brake pads.
If you usu a lly avoid heavy bra king or if there is
cor rosion prese nt, occasiona l heavy braking at
high speeds is recommended to clean the brake
roto rs and pads
c> ,& .
Brake system malfunction
If you notice that the bra ke pedal trave l has sud ­
denly in crease d, then a brake circuit in the dua l­
circuit b rake system may have malfunctioned.
Drive to an authorized A udi dealer or authorized
Audi Se rvice Facility immed iate ly to have the
problem corrected. On the way there, d rive w ith
reduced speed and keep in mind that you will
need a longer distance to stop and you will need
to press the bra ke ped al ha rder.
Low brake fluid level
When the bra ke fluid level is low, malfu nctions in
the b rake system may occur . T h e brake fluid level
is e lec tron ically moni tored.
Brake booster
The brake booster ampli fies t he p ressure you ap­
ply to the brake pedal.
A WARNING
- On ly app ly the brakes for the purpose of
cleaning the brake system when road and
traffic cond itions permi t. You must not en ­
da nger other road users. This inc reases the
ris k of an a ccid en t.
- Never let the vehicle roll while the engine is
sto pped bec ause t his increases the risk of an
a ccident.
153

Intelligent Technology
CJ) Note
- Neve r let the brakes "rub" by pressing the
pedal light ly when bra king is not actually
necessary. This causes the brakes to over­
heat and increases braking d istance and
causes wear .
- Before driv ing downhill a long distance on a
steep hi ll, decrease your speed and select a
l ower gear. This makes use of the engine
b raking effect and re lieves the brakes . If
you need to b rake additionally , brake in in­
te rvals and n ot co nti nu ously .
(J) Tips
-If the b rake booster is no t wo rking, you
must press the brake pedal with much more
fo rce th an norma l.
- If you re trofit you r vehicle with a fron t spoil­
e r, whee l cove rs o r similar items, ma ke sure
th at t he ai r flow to the fron t wheels is not
i nte rr upt ed . Ot he rw ise the bra ke sys tem
ca n become too hot.
Electromechanical
steering, Dynamic
steering
The elec trome chanical steering supp orts the
driver 's steering movemen ts.
P owe r stee ring adapts electronically based on
t he vehicle speed.
Indicator lights and messages
• Steering: malfunction! Please stop vehicle
If th is indicator light t urns o n and stays on and
this message appears, the power steer ing may
have fa iled.
Stop the vehicle in a safe location as soon as pos ­
sib le. Do
not continue driving. See an author ized
Aud i dea ler or a uthori zed Aud i Serv ice Facility fo r
assistance .
E£4 Steering: malfunction! You may continue
dri ving
If t he i nd ic ator lig ht tur ns on and the message
a ppears, the stee ring wheel may be more diff i-
154 cu
lt to move o r mo re sensitive than usu a l. The
steering wheel may also be at an ang le when
driv ing straight.
Drive slowly to an au thorized Audi de aler or au ­
thorized Audi Service Facili ty to have t he mal ­
funct ion correcte d.
f:$JI Dynamic steering: correcting steering wheel
po sition
If the indica tor ligh t turns on and this message
appears, the dynamic steering* is re in it ia liz ing.
The steer ing whee l will be easy to move afte r
sta rt ing t he engine . Reinitiali zation might be
necessary if the steering wheel was moved while
the engine was switched off. The disp lay turns
off if the initialization was successf ul.
(D Tips
-If the . or ':r,y indica to r light only stays on
for a sho rt time, you may cont inue driving .
- T he dynamic steering s tability sys tems
q page 151 are not ava ila bl e in the event of
a system malfunction .
- For add itio na l information o n dynamic
steeri ng, see
c:;, page 138.
ALL-wheel drive (quattro)
General information
In all whee l drive, the dr iv ing power is dis trib ut­
ed betwee n all fou r whee ls w hen needed . This
happe ns automatically depending on your driving
behavior as we ll as the c urrent road con ditions.
A lso see
c:;, page 151, Electronic stabili zation
control (ESC) .
The all-whee l dr ive system distr ibutes the dr iving
power va riably to the front and rear axle. It works
together with selective wheel torq ue control,
which act ivates when dr iv ing through c urves
q page 151. With the sport d ifferent ial*, power
distribution to the rear wheels is var iable and can
be adjusted using the drive select
q pag e 139 .
The all wheel drive concept is designed for high
engine power . Your vehicle is except iona lly pow­
erfu l and has excellent driving characteristics
bot h unde r normal d riving conditions and on
IJII>