2013 AUDI RS5 CABRIOLET brakes

Audi adapt ive crui se c ontrol an d bra kin g guard 9 3
confirmed by the video camera, an acute
collision warning.
- 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 conditions cou ld result in a co lli­
sion.
- Switch adaptive cruise control off tempo­ rar ily when driving in turning lanes, on
expressway exits or in cons truction
zones. This prevents the vehicle from ac­ celerating to the set speed when in these
situations.
- The adaptive cr uise control system wi ll
not brake by itse lf if you p ut your foot on
the accelerator pedal. Doing so can over­
ride the speed and distance regulation .
- When approaching stationary objects
such as stopped traff ic, adaptive cruise
control will not respond and braking
guard w ill have limited function.
- The adaptive cruise control system and
braking guard do not react to people, an­
ima ls, objects crossing the road or on­
coming objects.
- The function of the radar sensor can be
affected by reflective objects such as
guard rails, the entrance to a tunnel,
heavy rain or ice.
- Never follow a ve hicle so closely that you
cannot stop your vehicle safely. The
adaptive cruise cont ro l cannot slow or
brake the veh icle safely when you follow
ano ther veh icle too closely. Always re­
member that the automatic braking
function cannot bring the vehicle to a sudden or emergency stop under these
condit ions.
- To prevent unintended operation, always
switch ACC off when it is not being used.
(D Note
The sensor can be disp laced by impacts or
damage to the bumper, whee l housing and
underbody . That could affect the adaptive cruise control
system and braking g uard.
Have your authorized Audi dea ler or au­
thorized Audi Service Facility chec k their
funct ion.
In curves
App lies to vehicles: with A ud i ada ptive c ruise contro l
F ig . 1 04 Examp le : driv ing into a curve
When driving into a curve ¢ fig. 104 and out
of a curve, the adaptive cru ise contro l may re­
act to a vehicle in the next lane and app ly the
brakes. You can override or prevent the brak­
ing by pressing the accelerator pedal briefly.
Stationary objects
Applies to vehicles: wit h Audi adapt ive cr uise contro l
F ig . 1 05 Examp le: objec t chang ing la n es and stat ion­
a ry object
The adaptive cruise control system only reacts
to objects that a re mov ing or that the system
has a lready detected as moving . For examp le,
if a ve hicl e@ , which has already been detec t­
ed by the adaptive cru ise con trol , turns or
changes lanes and another stationa ry vehicle
@ is located in front of that vehicle, the sys­
tem will not react to the stationary vehicle.

Audi adaptive cruise control and braking guard 95
shown in the tachometer @and is also
shown briefly in the display @¢
fig. 108 .
Switching Audi adaptive cruise control off
~ Push the lever away from you into position
@ until it clicks into place. The message
ACC off appears.
@ Indicator lights
II-Adaptive cruise control is switched on . No
vehicles are detected up ahead. The stored
speed is ma intained.
I-A moving vehicle is detected up ahead .
The adaptive cruise control system regulates
the speed and distance to the moving vehicle
ahead and acce lerates/brakes automatica lly.
I -When automatic braking is not able to
keep enough distance to a previously detected
mov ing vehicle up ahead , you must take con­
trol and brake ¢
page 9 7, Request for driver
intervention.
© Display
If adaptive cruise control is not shown in the
d isplay, you can call it up with the
I RES ET I
button ¢ page 24.
Based on the symbols in the d isplay, you can
determine if the system is maintaining a dis­
tance to the vehicle ahead and what that dis­
tance is.
No vehicle -No vehicle ahead was detected.
White vehicle -A vehicle ahead was detected .
Red vehicle -Prompt for the driver to take ac­
tion
¢ page 97.
Both
arrows on the s cale © indicate the dis­
tance to the vehicle ahead . No ar row appears
when the vehicle is on an open road and there
is no object ahead . If an object is detected
ahead, the arrow moves on the scale.
The green zone on the scale shows the stored
distance. For information on changing the
stored distance, refer to¢
page 96. If the
distance selected is too close or may soon be­
come too close, th e arrows move into the red
zone on the scale .
A WARNING
Improper use of the adaptive cruise con­
trol can cause collisions, other accidents
and serious personal injuries.
- Pressing the
!SET ! button when driv ing at
speeds below 20 mph (30 km/h), w ill au­
tomatically accelerate the vehicle to
20 mph (30 km/h), which is the mini­
mum speed that can be set.
@ Tips
-If you switch the ignit ion or the adaptive
cruise control off, the set speed is erased
from the system memory.
- The electronic stab ilizat ion control (ESC)
and the anti-slip-regulat ion (ASR) are au­
tom atica lly turned on when the adaptive
cruise control is turned on. Both systems
cannot be turned off if the adaptive
cruise control is turned on . You cannot
switch the ESC to the sport mode when
adaptive cruise contro l is switched on.
Changing the speed
Applies to vehicles: wit h Audi adaptive cruise contro l
0
f
• 0
Fig . 1 09 Selector lev er: ch an gin g the speed
~ To increase or reduce the speed in incre­
ments,
tap the lever up or down.
~ OI) N 0 ±
~
~ To increase or reduce the speed quickly, hold
the lever up or down unt il the red LED@
r eaches the desired speed
c> page 94 ,
fig . 108.
Fo llow ing any changes, the new stored speed
will be displayed brief ly in the display @
¢page 94, fig. 108.

96 Audi adaptive cruise control and braking guard
Interrupting cruise control
Applies to vehicles: with Audi adaptive cruise control
Fig. 110 Selector leve r
Requirement : adaptive cruise contro l must be
switched on
¢fig.110 (i).
Overriding cruise control
.. To accelerate ma nually, press the accelera­
tor pedal. The message
ACC override ap­
pears .
.. To resume adaptive cruise control, remove
your foot from the gas pedal. The system re­
turns again to the speed that was saved be­
fore .
.. You can save a new speed at any time by
pressing the
I SETI button ¢ page 11, fig. 4.
Canceling cruise control while driving
.. Move the lever into posit ion @. The mes­
sage
ACC standby appears . Or
.. press the brake pedal.
.. To resume the stored speed, move the lever
into position @.
&_ WARNING
Never resume the stored speed if the
speed is too high for prevailing road, traf­
fic or weather cond itions.
Setting the distance
Applies to vehicles: wit h Audi adapt ive cr uise contro l
Fig. 111 Selector lever : sett ing the distance
.. Tap the switch to display the current set dis­
tance
¢ fig. 111 .
.. To increase or reduce the distance by incre­
ments, tap the switch again to the left or
r ight. The distance between the two vehicles
w ill change in the instrument cluster dis­
play .
When approach ing a moving vehicle up ahead,
the adaptive cruise control system brakes to
match that object's speed and then maintains
the stored dis tance. If the vehicle ahead ac­
ce le rates, adaptive cruise control will also ac­
ce lerate up to the stored speed.
T he higher the speed, the greater t he distance
in yards (meters)
c:::> /1.. Th e Distan ce 3 setting
is recommended .
T he distances provided are specified va lues .
Depending on the driv ing situation and the
how the veh icle ahead is driving, the actual
distance may be more or less than these tar­
get distances.
T he various symbols for the time inc reme nts
appear briefly in the information line @
¢ page 94, fig. 108 when you change the set­
tings.
c::::,_c::::, ___ Distance 1: Th is setting corre-
sponds to a distance of 92 feet/28 meters
when traveling at 62 mph (100 km/h), or a
time interval of 1 second.
c::::, __ c::::, __ Distance 2: This setting corre­
sponds to a distance of 118 feet/36 meters
when traveling at 62 mph (100 km/h), or a
time interval of 1.3 seconds.

98 Audi adaptive cruise control and braking guard
Audi braking guard
Descript ion
Applies to vehicles: with Audi adaptive cruise control
F ig . 11 3 Instrumen t cl uste r: approach warn ing
Braking guard uses a radar sensor. It also
functions within the limits of the system
when adaptive cruise cont ro l is switched off .
What can Audi braking guard do?
When detected i n time, the system ca n assess
situations when a vehicle ahead brakes sud­
denly or if your own veh icle is traveling at a
hi gh speed and approachi ng a ve hicle up
a head that is moving more slowly . Brak ing
guard does not react if i t can not detect the
situation.
The system advises you of various situations :
- The
distance warning is g iven if you are too
close to t he vehicle ahead for a long time . If
the vehicle ahead b rakes sharply, you w ill
not be ab le to avoid a c oll is io n. The indicator
li ght
I in the display comes on .
- The
approach warning is g iven when a de­
tected vehicle up ahead in yo ur lane is mov­
i ng much more slowly than you are or if it
brakes sha rply . W hen th is wa rning is given,
i t may only be possib le to avoid a collisio n
b y swerving or br aki ng sha rply . Th e in dicator
l igh t
I and indi ca tor in the disp lay will wa rn
yo u about t he d anger
¢ fig. 113 . Yo u will al­
so hear an acoustic signa l.
I f yo u do not reac t fas t enoug h or do not reac t
a t all t o the si tuation , Br aking gu ard will in-
ll Thi s is not ava ilable in some co un tri es .
tervene by br aki ng and the message braking
guard intervention
w ill appea r.
- If a coll is ion is imm inent, the sy stem wi ll
fi rst provide an
acute warning by br iefly and
sharply a pplying the brakes.
- If you do no t re act to the acu te wa rning,
bra king g uard can brake w it hi n the lim its of
the system. This red uces the vehicle speed
in the event of a collision .
- At speeds un der 20 m ph (3 0 km/h), the sys­
tem can initiate a comp lete deceleration
short ly before a co llision .
1
).
- If the bra king g uard senses that yo u are not
bra king hard enough w hen a co llision is im ­
m inent, it can inc rease the brak ing force.
Which functions can be controlled?
You can swi tch braki ng gu ard and t he dis­
tance/ap proa ch warn ing on or off in the rad io
o r MM I
¢ page 99, Settings in the radio/
MMI.
A WARNING
-Lack of attention can cause collisions , oth­
e r accidents and serio us pe rsonal injuries.
The braking gua rd is an assist system and
ca nnot preve nt a collision by itself. Th e
dr ive r must alway s intervene. Th e dr ive r is
al ways res po nsib le for braki ng a t the co r­
r e ct t ime .
- Always pay close attent io n to traffic,
eve n when the br aking gu ard is swi tched
o n . B e rea dy t o int erve ne and be re ad y to
t ake com plete contro l w he never nece ssa­
ry. Always keep the safe and legal dis ­
tance between your ve hicl e an d veh icles
up ahead.
- Braking gua rd wo rks within limits and
will not res po nd outside the system lim­
its, for examp le w hen approachi ng a
sto pped veh icle o r stati onary o bstacle
(end of a t raffic jam or ve hicle that has
b roken dow n in t ra ff ic).

ESC includes and/or works together with the
anti-lock brake system (ABS), brake assist sys ­
tem, anti -slip regulation (ASR) , e lectronic dif­
ferential lock (EDL), dynamic steering* and se­ lective wheel torque control*. ESC is switched
on all the time. In certa in situations when you
need less t raction, you can sw itch off ASR by
p ress ing the button
ij] Q page 178, fig . 169
or ~ page 178, fig. 170. Be sure to sw itch
ASR on again when you no longer need less
traction.
Anti -lock braking system (ABS)
ABS prevents the wheels from locking up
when braking. The veh icle can still be steered
even du ring ha rd b raking . Apply steady pres­
sure to the brake pedal. Do not pump the ped­
al. A pulsing in the brake peda l indicates that
the system is he lping you to brake the vehicle .
Brake ass ist system
The brake assist system can decrease braking
d istance.
It increases braking power when the
driver presses the brake pedal qu ic kl y in eme r­
gency situations . You must p ress and ho ld the
brake peda l until the situation is over. In
vehicles with adaptive cruise control*, the
brake assist system is more sensit ive if the
d istance detected to the vehicle ahead is too
small.
Anti- slip regulati on (ASR )
ASR reduces engine power when the drive
wheels begin to spin and adapts the force to the road condit ions. This makes it eas ier to
start, accelerate and drive up hills.
El ectronic diffe rential lock (EDL )
The ED L brakes wheels that are spinning and
transfers the drive power to the other wheels .
This function is available up to about 60 mph
(100 km/h).
I n extreme cases, ED L automatically switches
off to help keep the brake on the braked whee l
from overheating.
EDL wi ll switch on again au­
tomatically when conditions have returned to normal.
Int ellig ent technolog y 177
Dynamic steering *
On vehicles with dynam ic steering*, ESC he lps
stabilize the steering in crit ica l sit uations.
Select ive wheel torque control*
The select ive wheel torque control operates
when d riving through curves. The front wheel
on the inside of the curve o r both wheels on
the ins ide of the c urve a re bra ked select ively
as needed. This minimizes sliding in the front
whee ls and allows for more precise driv ing
through curves. The app licable system may
not act ivate when dr iving in wet or snowy con­
ditions.
A WARNING -
- ESC, ABS, ASR, EDL dynam ic steering*
and the select ive wheel torque control*
cannot ove rcome the laws of physics.
This is especially important on slippery
or wet roads.
If t h e systems beg in acting
to stabilize your veh icle, yo u should im­
mediately change your speed to match
the road and traffic conditions . Do not
let the increased safety provided by
these systems tempt you to take r isks.
Doing so will increase the risk of a loss of
veh icle contro l, collision and ser ious per­
sonal injur ies.
- Always adapt your speed to road, traffic
a nd weather conditions. The risk of Los-
ing contro l of the vehicle i ncreases when
driving too fast, espec ially through
curves and on slippery or wet roads, and
when dr iv ing too close to vehicles up
ahead. ESC, ABS, the brake assist sys ­
tem, ASR, ED L dynamic steering * and the
selective whee l torque control * cannot
prevent coll is ions.
- Always accelerate with spec ial care on
even, smooth surfaces such as those that
are wet or covered with ice and snow.
The drive wheels can spin even with
these assistance systems that can not al­
ways he lp to red uce the risk of loss of ve­
hicle control.
•
•

You can compensate for th is sligh tly re duced
brak ing power by push ing harder on the brake
pedal. Avoid heavy braking loads d uring the
break-in per iod.
Operating condit ion s and d riv ing hab it s
The brakes on today's automobi les are st ill
subject to wear, depend ing largely on operat ­
ing conditions and driving habits¢.&. . On
vehicles that are either driven mostly in stop­ and-go city traffic or are driven hard, the brake pads should be checked by your author­
i zed Audi dealer more often than specified i n
the
Warranty & Maint enan ce booklet . Failure
to have your brake pads inspected can result
in reduced b rake performance.
On steep slopes, you should use the brak ing
effect of the engine . Th is way, you prevent un­
necessary wea r on the brake system. If you
must use you r brakes, do not hold the brakes
down continuously. P ump the b rakes a t inter ­
va ls.
Operating noise
Noises may occur when braking depending on
the speed, braki ng force and outside condi­
tions such a s tempe ratu re a nd h umidity .
Due to the nature of the materials used i n ce ­
ramic brake rotors*, nois es may become more
apparent at low speeds.
Effect of w ater and ro ad s alt
In certain situat ions, for example after driving
through water, i n heavy ra in, after over night
condensation or after washing your car, the
b rak ing effect can be reduced by moistu re or
i ce on the bra ke roto rs and b rake pads . The
b ra kes must be dried fi rs t w it h a few caref ul
b ra ke app lications.
At h igher speeds and with the w indshield w ip­
e rs turned on, the brake pads p ress against
the brake rotors for a short amount of time.
This occurs a t reg ular in tervals wi tho ut the
d river noticing and provides for better brake
response time un der wet conditions.
The effectiveness of the brakes can be reduced
when the vehi cle is dr iven o n a salt -cove re d
Int ellig ent technolog y 179
road and the b ra kes are no t used. Likewise ,
you clean off acc umulated salt coating from
brake d iscs and pads with a few cautio us ap ­
plications of the brake
9 ,&. .
Due to the ir sur face character istics, ceramic
brake rotors* absorb moisture i n such condi­
tions. T his can cause a tempo rary reduction in
braking force compared to dry brakes. Yo u can
compensate for this by pressing the brake
pedal harder .
Corrosio n
There may be a tendency for dirt to b uild up
on the brake pads and corros ion to form on
the d iscs if the car is not driven regularly or
o nly for short trips w ith litt le use of the
brakes .
If the brakes are not used frequently, or if cor­
ros ion has formed on the discs, i t is adv isable
to clean off the pads a nd d iscs by braking
firmly a few times from a moderately high
speed
9 &. .
Fault s in the brake sy stem
If you shou ld notice a sudden increase in
brake pedal travel, then one of the two b rake
c ircui ts may have failed ¢&. .
Lo w brake fluid lev el
Malfunctions can occ ur in the brake system if
the brake fluid level is too low. The brake fluid
level is monitored electronica lly.
Brake booster
T he br ake booster inc reases the pressure tha t
yo u gene rate with t he brake peda l. It works
o nl y when t he engine is running .¢
&
Brake lining wear status
B ra ke lining wear may be checked by visual in­
spe ction o f the condition of the bra ke pads
th rough the open ings in the wheel. If neces ­
sary, the wheel may be removed for t his in ­
spection ¢
page 245, Changing a wheel.
•
•

180 Intelligent technology
8_ WARNING
-New brake pads don't have the best stop­
ping power and must be "broken -in" dur ­
ing the initial 100 to 150 miles (150 to
200 kilometers) of normal city driving .
The break-in period can be considerably
longer for vehicles with ceramic brake ro­
tors*. You can compensate for this by pressing the brake pedal more firmly.
This also applies later when new pads are
installed.
- You should perform braking maneuvers
for the purpose of cleaning the brake
system only if road conditions permit.
Other road users must not be put at risk -
you may cause an accident!
- Before descending a steep grade, reduce
speed and shift transmission into a lower
gear or lower driving range. Do not ride
the brakes or hold the pedal down too
long or too often. This could cause the
brakes to get hot and diminish braking
efficiency .
- Do not "ride the brakes" by resting your
foot on the pedal when you do not intend
to brake . This may cause the brakes to
overheat, premature wear and increased
stopping distance.
- Under certain climatic and operating
conditions such as passing through wa­
ter, driving in heavy rain or after washing
the vehicle, the effectiveness of the
brakes can be reduced. In winter, ice can
accumulate on the brake pads, linings,
discs and drums . Carefully apply brakes
for a test . Brakes will dry and ice coat­
ings will be cleaned
off after a few care­
ful brake applications.
- Driving for an extended period of time on
salt-covered roads without using your
brakes can also affect braking efficiency.
Clean
off accumulated salt coating from
brake discs and pads with a few careful
brake applications.
- If you damage the front spoiler, or if you
install a different spoiler, be sure the air
flow to the front brakes is not obstruct- ed
. Otherwise the brake system could
overheat reducing the effectiveness of
the entire brake system.
- Failure of one brake circuit will impair
the braking capability resulting in an in­
creased stopping distance. Avoid driving
the vehicle and have it towed to the near­
est authorized Audi dealer or qualified
workshop.
- Never let the vehicle roll to a stop with
the engine shut off.
- If the brake booster is not working, for
example when towing your vehicle, or
because the brake booster has somehow
been damaged, the brake pedal must be
pressed considerably harder to make up
for the lack of booster assistance.
Electro-mechanical
power assist, dynamic
steering
The electro-mechanical power assist helps
the driver when steering .
Power steering adapts electronically based on
the vehicle speed.
Indicator lights and messages
• Steering defective! Do not drive vehicle!
If this indicator light turns on and stays on
and this message appears, the power steering
may have failed.
Do
not continue driving . See your authorized
Audi dealer or other qualified repair facility
for assistance .
''!'Y Dynamic steering: System fault! You can
continue driving
If the indicator light turns on and the mes­
sage appears, the steering may be more diffi­
cult to
move or more sensitive than usual. The
steering wheel may also be at an angle when
driving straight .
Drive slowly to your authorized Audi dealer or
qualified workshop to have the malfunction
corrected. .,..

A WARNING ,~
After driving through water, mud, slush,
etc., the brakes may be slow to take effect
because of wet brake rotors and pads. Dry
the brakes first by braking carefully to re­
store the full brak ing effect.
([) Note
Vehicle components such as the engine,
transmiss ion, suspension or electrical sys­
tem can be severely damaged by driving
through wate r.
@ Tips
- Check the depth of the water before dr iv­
i ng through it.
- Do not stop the veh icle, dr ive in reverse
or switch the engine off when driving
th rough water.
- Keep in mind that oncoming vehicles may create waves that raise the water
level and make it too deep for you r vehi­
cle to drive through safely.
- Avoid dr iving through salt water because
i t can cause corrosion.
Warming up and
cooling down
By carefully warming up and cooling down
your vehicle, you can he lp ensure that it is not
overstressed unnecessarily during sporty driv­ ing.
When warming up, the vehicle is driven at a maximum engine speed of 6000 RPM in order
to raise the engine oil temperature to a mini­ mum of 140 °F (60 °C) . The tires also only
reach their full road holding capability once
they have warmed up .
The cooling fan can continue to run in your ve­ h icle after the engine is switched off. Howev­
er, driving the vehicle to cool it down is part ic­
ularly important . Du ring sporty driving, the
engine and brakes, the exha ust system, and
the transm ission all become ext remely hot.
Before you park the vehicle, you shou ld drive
Dri vin g and en vironm ent 185
it for a few miles/kilometers at light load in
the low rpm range to allow it to cool down.
Catalytic converter
It is very important that your emission con­
trol system (catalytic converter) is function­
ing properly to ensure that your vehicle is run­
ning in on environmentally sound manner.
"" Always use lead-free gasoline c> page 202,
Fuel supply.
"" Never run the tank down all the way to emp­
ty.
"" Never put too much motor o il in your engine
<=> page 212, ~ Adding engine oil .
""Never try to push- or tow-sta rt you r vehicle.
The catalyt ic converter is an efficient "clean­
up" device bui lt into the exhaust system of
the ve hicl e. The cata lytic conve rter bu rns
many of t he pollutants in the exha ust gas be­
fo re t hey are re leased into the atmosphere.
The exclusive use of unleaded fue l is critically
important for the life of the catalyt ic convert­
er and proper funct ion ing of the engine.
A WARNING ~
- The temperature of the exhaust system
is high, both when driving and after stop ­
ping the engine.
- Never touch the exhaust tail pipes once they have become hot . This could result
in burns .
- Do not park or operate the vehicle in areas where the hot exha ust system may
come in contact with dry grass, brush,
fuel spill or other material wh ich can
cause a fire.
- Do not apply additional undercoating or rustproof ing on or near the exhaust
manifold, exhaust pipes, catalytic con­
verter or heat shields . Dur ing driving, the
substanc e used fo r undercoating could
overheat and cause a fire. •
•