brake AUDI A5 2015 Owner´s Manual

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Audi adaptive cruise control and braking guard
.. To increase or reduce the speed in increments,
tap the lever up or down .
.. To increase or reduce the speed quickly,
hold
the lever up or down until the red LED ® reach ­
es the desired speed¢
page 91 , fig . 98.
Following any changes, the new stored speed will
be disp layed briefly in the display@¢ page 91,
fig . 98 .
Interrupting cruise control
Applies to vehicles: with Audi adaptive cruise control
Fig. 100 Selector lever
Requirement : adaptive cruise control must be
switched on
¢ fig. 100 @.
Overriding cruise control
.. To accelerate manually, press the accelerator
pedal. The message
ACC override appears.
.. To resume adaptive cruise control, remove your
foot from the gas pedal. The system returns
again to the speed that was saved before.
.. You can save a new speed at any time by press­
ing the
I SET I button ¢ page 11 , fig . 4.
Canceling cruise control while driving
.. Move the lever into position @. The message
ACC standby appears. Or
.. press the brake pedal.
.. To resume the stored speed, move the lever in­
to posit ion
@ .
A WARNING
Never resume the stored speed if the speed is
too high for p revailing road, traffic or weather
conditions.
Setting the distance
Applies to vehicles: with Audi adaptive cruise control
Fig. 101 Selector lever: sett ing the distance
.. Tap the switch to display the current set dis­
tance
¢ fig . 101 .
.. To increase or reduce the distance by incre­
ments, tap the switch again to the left or right.
The distance between the two veh icles will
change in the instrumen t cluster display .
When approach ing a mov ing vehicle up ahead,
the adaptive cruise control system brakes to
match that object's speed and then maintains
the stor ed distance .
If the vehicle ahead acceler­
ates, adaptive cruise control will also accelerate
up to the stored speed.
T he hig her the speed, the greater the distance in
yards (meters) ¢&. .The
Distance 3 setting is
recommended .
T he distances provided are specified values . De­
pending on the driving s ituation and the how the
vehicle ahead is driving, the actual distance may
be more or less than these target distances .
T he various symbols for the time increments ap­
pear briefly in the information line @¢
page 91,
fig. 98
when you change the settings.
,::::::,_,::::::, ___ Distance 1: This setting corresponds
to a distance of 92 feet/28 meters when travel­
ing at 62 mph (100 km/h), or a time interval of 1
second.
,::::::, __ ,:::::, __ Distance 2: This setting corresponds
to a distance of 118 feet/36 meters when travel­
in g at 62 mph (100 km/h), or a time interval of
1.3 se conds. ..,.
93

Audi adaptive cruise control and braking guard
Audi braking guard
Description
Applies to vehicles: with Audi adaptive cruise co ntrol
F ig. 103 Instrument cluste r: app roac h warn ing
Braking guard uses a radar sensor. It also func­
tions within the limits of the system when adap­
tive cruise control is switched off .
What can Audi braking guard do?
When detected in time, the system can assess
situations when a vehicle ahead brakes suddenly
or if your own vehicle is traveling at a high speed
and approaching a vehicle up ahead that is mov ­
ing more slowly . Braking guard does not react if it
cannot detect the s ituation .
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 d isplay comes on .
- The
approach warning is given when a detected
vehicle up ahead in your lane is moving much
more slowly than you are or if it brakes sharply .
When this warning is g iven, it may only be pos­
s ible to avoid a co llision by swerving or braki ng
sharply. The indicator light . and indicator in
the display will warn yo u about the danger
c> fig. 103. You wi ll also hear an acoust ic signa l.
If you do not react fast enough or do not react at
all to the situation, Braking guard will intervene
by braking and the message
braking guard inter-
~ vention will appear.
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This is not available in som e count ries. rl
- If a collision is imminent, the system wi ll first
provide an
acute warning by briefly and sharply
app ly ing the brakes.
- If you do not react to the acute warning, brak­
ing guard can brake within the limits of the sys­
tem. This reduces the vehicle speed in the event
of a collision.
- At speeds under 20 mph (30 km/h), the system
can initiate a complete deceleration shortly be­
fore a collisionl).
- If the braking guard senses that you are not
braking hard enough when a collision is immi­
nent, it can increase the braking force.
Which functions can be controlled?
You can switch braking guard and the distance/
approach warning on or off in the radio or MMI
c> page 96, Settings in the radio/MM! .
A WARNING
-
Lack of attention can cause collisions, other
accidents and serious personal injuries. The b raking guard is an ass ist system and cannot
prevent a collis ion by itself. The driver must
always intervene. The driver is always respon­
sib le for b ra kin g at the correct time.
- Always pay close attent ion to traffic, even
when the braking guard is switched on. Be
ready to intervene and be ready to take com­
p lete control whenever necessary. Always
keep t he safe a nd legal distance between
your vehicle and vehicles up ahead.
- Braking guard works within limits and will
not respond outside the system limits, for
examp le when approaching a stopped vehi­
cle or stationary obstacle (end of a traffic
jam or vehicle that has broken down in traf­
f ic).
- Always remember that the radar sensor for
the braking guard works on ly w ithin defined
detection and range limits that may prevent
the proper detection of other vehicles.
- The radar sensor's funct ion and range can
be reduced by ra in, snow and heavy spray.
Moving vehicles up ahead may not be
,.
95

Audi adaptive cru ise control and b ra king guard
promptly detected or may not be detected
at all.
- Reflective surfaces including crash barriers
or tunnel entrances may impair the function
of the radar sensor.
(D Tips
- You can cance l the braking that is initiated
by the system by braking yourself, by accel­
erating noticeably or by swerving.
- Braking g uard error messages ~
page 96.
- Keep in mind that braking guard can brake
unexpected ly . Always secure any cargo or
objects that you are transporting to reduce
the risk of damage or injury.
Settings in the radio/MMI
Applies to veh icles : w ith Audi adaptive cruise control
.,. Select : I CARI funct ion button > Car system s*
control button > Driver assis t> Aud i braking
guard .
Or
.,. Se lect :
~I C-A-R~I funct ion button > Audi braking
guard .
S ys tem -
Sw itch Audi braking guard O n and Off .
When you switch the ignition on, the message
Aud i braking gu ard off appears if the system is
sw itched off.
Ea rly warning -The distance and approach warn ­
ings in the display can be sw itched
On /Off.
@ Tips
- Your settings are automat ically stored and
assigned to the remote control key being
used at the times the sett ings are made .
- If you restrict or switch off the ESC, the
braking guard also switches itself off
~page 171.
- Switch brak ing guard off when you are load ­
i ng the veh icle onto a vehicle carr ier, tra in,
sh ip or other type of transportation . Th is
can prevent undesired wa rnings from the
braking guard system.
96
Messages
App lies to vehicles: wi th Audi adap tive c ru ise contro l
Bra king gu ard : Off
This dr iver message appears if the system is
tu rned off via the radio/MM I*. O therwise, if the
system is t urned off, the information appears ev­
ery time short ly after the start of the trip.
The driver message a lso appea rs if the system is
not available due to a malfunction or if the ESC is
not sw itched on
~ page 171 . If th is is the case,
the system wi ll not provide warnings abo ut a
possible collision .
Braking guard : A cti vated
This dr ive r message appears if sharp brake pres­
sure was applied due to an acute warn ing .
•••
Three white dots appear if a setting cannot be se­
l ected with the operating lever. For example, this
happens if you want to raise/ lower the speed
even though there was no prev iously saved
speed .
ACC: D ea ctiv ation
The dr iver message appears in vehicles with man­
ual transmission . If the clutch pedal was p ressed
down for too long , the adaptive cruise control
turns off. A chime sounds as a reminder.
A CC: S enso r blo ck e d
This message appears if the sensor v iew is ob­
structed, for examp le by leaves, snow, heavy
spray or d irt . Clean the sensor~
page 89, fig. 93.
ACC: not a vailabl e
The driver message appears if there is a malfunc­
tion. The adaptive cruise control turns off . A
ch ime sounds as a rem inder . Have the system
checked by an authorized Aud i deale r or author­
i zed Audi Serv ice Facility .
ACC : un available
The driver message appears if, for example, the
brake temperature is too high. The adaptive
cruise control is temporarily unavailable . A chime
sounds as a reminder . .,.

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Audi adaptive cruise control and braking guard
Engine speed!
This d rive r message appea rs in vehi cles w it h
m anu al t ran smis sion if the d river h ad not up­
shi fted o r downshifted in time while using adap­
tive cruise contro l braking or accelera ting, ca us­
ing the vehicle to exceed or not reac h the permit­
ted limit s peed. The adaptive c ruise control turns
off. A chime s ounds as a reminder.
Shift leve r po sition!
Ve hicles w it h an autom atic transmission: the
d river me ssage appe ars if the sele ctor leve r is
shi fted to the N pos it io n. The a daptive cru ise con­
trol is not avai lab le while in this pos ition .
Ve hicles w it h manual tra nsmission : the d river
m essage appe ars for vehi cles w it h manu al tra ns ­
miss io n if there is no forward ge ar engaged,
meanin g if the reverse gear o r the 1s t gear is en ­
gaged o r if the selecto r leve r is in the neutra l po ­
sition . The adaptive cruise control is not ava ilab le
while in this p osit ion.
Stabilization cont rol (ESC )
This message appea rs if the elec troni c stab ili za ­
ti on con trol ( ESC) i s takin g action to stabi lize t he
ve hicl e. The a daptive cru ise contro l tur ns off. A
chime soun ds as a remin der .
Speed too low
This message appea rs if the current speed is too
l ow
to set or to maintain the des ired speed.
The speed being saved must be at least 20 mph (30 km/h). T he cr uise control is turned off for
speeds lowe r th an 12 mph (20 km/h) . The adap­
tive c ruise co ntrol re m ains turned o n for speeds
above 9 5 mph (150 km/ h) (override).
It w ill sta­
biliz e again at 9 5 mph (15 0 km/h) whe n the dr iv­
e r ta ke s his foot off of the g as pedal.
Parking brake!
The drive r message appears when the park ing
b rake is activated. Adaptive cru ise cont ro l is
turned off . A ch ime sounds as a remi nder .
97

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proper deployment of the airbag. Small ob­
jects can be thrown through the veh icle if
the a irbag deploys and injure you or your
passengers .
Pedal area
Pedals
The pedals must always be free to move and
must never be interfered with by a floor mat or
any other object.
Make sure that all pedals move freely without in­
terference and that noth ing prevents them from
returning to their original pos it ions .
Only use floor mats that leave the peda l area free
and can be secured with floor mat fasteners .
If a brake circuit fails, increased brake pedal trav­
el is required to bring the vehicle to a full stop.
A WARNING
Pedals that cannot move freely can cause loss
of vehicle control and increase the r is k of seri­
ous lnJUry.
- Never place any objects in the driver's foot­
we ll. An object could get into the peda l area
and interfere with peda l function . In case of
s udden br aking or an accident, you wou ld
not be able to brake o r acce lerate!
- Always make sure that noth ing can fa ll or
move into the dr iver's foo twe ll.
Floor mats on the driver side
Always use floor mats that can be securely at­
tached to the floor mat fasteners and do not in­
terfere with the free movement of the pedals.
• Make sure that the floor mats are properly se­
cu red and cannot move and i nterfere wit h the
peda ls ~
& -
Use only floor mats that leave the pedal area un­
obstructed and that are firm ly secured so that
they cannot slip out of pos it ion. You can obtain
suitab le floo r mats from you r authorized Audi
dealer.
Dr ivin g s afet y
Floor mat fasteners are insta lled in your Audi.
Floor mats used in your vehicle must be attached
to these fasteners. P roperly securing the floor
mats will preven t them from sl iding into posi­
t ions that could interfere with the pedals or im­
pair safe operation of your vehicle in other ways.
A WARNING
-Pedals that cannot move free ly can result in a
loss of vehicle control and increase the risk of
serious personal injury.
- Always make sure that floor mats are prop­
erly secured.
- Never p lace or install floor mats or other
f loor coverings in the vehicle that cannot be
properly secured in p lace to prevent them
from slipp ing and interfering with the ped­
als or the ab ility to control the vehicle .
- Never p lace or install floor mats or other
f loor coverings on top of already installed
floor mats . Addit ional floor mats and other
cover ings will red uce the size of the pedal
area and interfe re with the pedals .
- Always prope rly reinstall and secure floo r
mats that have been taken out for cleaning.
- Always make sure that objects cannot fall
into the driver footwell while the vehicle is
mov ing. Objects can become trapped under
the brake pedal and acce lerator pedal caus­
ing a loss of vehicle control.
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Smart Technology Notice about data
recorded by the Event
Data Recorder and
vehicle control modules
Event Data Recorder
This vehicle is equipped with an Event Data Re­
corder (EDR). The main purpose of an EDR is to
record, in certain crash or near crash-like situa­
tions, such as an a irbag deployment or hitting a
road obstacle, data that will assist in understand­
ing how a vehicle's systems performed. The EDR
is designed to record data related to vehicle dy­
namics and safety systems for a short per iod of
time, typically 30 seconds or less. The EDR in this
vehicle is designed to record such data as:
- How various systems in your vehicle were oper­
ating;
- Whether or not the driver and passenger safety
belts were buckled/fastened;
- How far (if at all) the driver was depressing the
accelerator and/or brake pedal; and,
- How fast the vehicle was traveling.
These data can he lp provide a better understand­
ing of the circumstances in which crashes and in­
juries occur. NOTE: EDR data are recorded by your
vehicle only if a non-trivial crash situation occurs;
no data are recorded by the EDR under normal
driving conditions and no personal data (e .g.,
name, gender, age, and crash location) are re­
corded. However, other parties, such as law en­
forcement, could combine the EDR data with the
type of personally identifying data routinely ac­
quired during a crash investigation.
To read data recorded by an EDR, special equip­
ment is requ ired, and access to the vehicle or the
E DR is needed. In addition to the vehicle manu­
facturer, other parties, such as law enforcement,
that have the special equipment , can read the in­
formation if they have access to the vehicle or the
EDR.
Some state laws restrict the retr ieval or down­
l oading of data stored by EDRs installed in a vehi­
cle for the express purpose of retriev ing data af-
Smart Technology
ter an accident or crash event without the own­
er's consent.
A udi will not access the EDR and/or similar data
o r give it to others -
- unless the vehicle owner (or lessee if the veh i­
cle has been leased) agrees; or
- upon the official request by the police; or
- upon the order of a court of law or a govern-
ment agency; or
- for the defense of a lawsuit through the judicial
discovery process .
- Audi may also use the data for research about
veh icle operation and safety performance or
provide the data to a th ird party for research
purposes without identifying the spec ific vehi­
cle or information about the ident ity of its own­
er or lessee and only after the recorded vehicle
data has been accessed.
Vehicle control modules
Your vehicle is also equ ipped with a number of
electron ic contro l modules for various vehicle
systems, such as eng ine management, emission
control, airbags, and safety belts.
These electronic control modules record data during norma l vehicle operation that may be
needed by trained technicians for diagnostic and
repair purposes. The recording capabil ity of these
modules is lim ited to data (no sound is reco rded).
Only a small amount of data is actua lly recorded
over a very limited period of time, or stored when
a system fau lt is detected by a contro l module.
Some of the data stored may relate to vehicle
speed, direction, or braking, as well as restraint
system use and performance in the event of a
crash . Stored data can also only be read and
downloaded w ith specia l equipment that is di­
rectly connected to the vehicl e.
(D Tips
Your vehicle may be equipped with Audi con­
nect. Your use of certain Audi connect fea­
tures requires wireless serv ices that are pro­
v id ed by a third party wire less telecommuni­
cations provider . For detai ls regard ing how in­
formation obtained through Audi connect is
collected, processed, transmitted, used, and ..,.
169

Smart Technolog y
shared, ple ase see your contract with the
wireless telecommunications provider and the "About Aud i connect" tab in your vehicle's
MMI*:
I MENU ! button > Audi connect > About
Audi conne ct .
Electronic Stabilization
Control (ESC)
Description
ESC helps to improve road holding and vehicle
dynamics to help reduce the probability of sk id­
d ing and loss of veh icle control.
It works only
when the engine is runn ing . ESC detects certain
d ifficult driving situations, including when the ve­
h icle is beginn ing to sp in (yaw) out of control and
he lps you to ge t the vehicle back u nder cont rol by
selectively braking the wheels, and/or reducing
engine power and providing steering assistance
to help hold the vehicle on the driver's intended
course. The indicator light
liJ in the instrument
cluster blinks when ESC is taking action to help
you control the veh icle.
ESC has limitations. It is important to remember
that ESC cannot overcome the laws of physics. It
will not always be able to help out under all con­
d itions you may come up against. For example,
ESC may not always be able to help you master
situations where there is a sudden change in the
coefficient of friction of the road surface. Whe n
there is a section of d ry road that is s uddenly cov ­
ered wi th wa ter, s lush or snow, ESC cannot per­
form the same way it wou ld on the d ry surface . If
the vehicle hydroplanes (rides on a cushion of wa ­
ter instead of the road surface), ESC wi ll not be
ab le to he lp you steer the veh icle because contact
with the pavement has been i nterrupted and the
ve hicle cannot be braked or steered. Dur ing fast
cornering, particula rly on w inding roads, ESC
cannot a lways deal as effect ively with d iff icu lt
d riving situat ions than at lower speeds. When
towing a trailer, ESC is not able to he lp yo u regain
con trol as it wou ld if yo u were not towing a trail­
er .
A lways adjust you r speed and dr iving style to
road, traffic and weather conditions. ESC cannot
override the vehicle's physical limi ts, increase the
170
available traction, or keep a vehicle on the road if
road departure is a result of driver inattention .
Instead, ESC improves the possibility of keeping
the ve hicle under control and on the road dur ing
extreme maneuvers by using the dr iver's steering
i nputs to help keep the vehicle going in the in­
tended direction. If you are traveling at a speed
that causes you to run off the road before ESC
can p rov ide any assistance, you may not expe ri­
ence the benefi ts of ESC.
ESC is switched o n all the time. In ce rtain s itua­
tions when you need less traction, you can switch
off ASR by p ress ing the button [!]¢
page 171,
fig. 153 or ¢page 171, fig. 154. Be s ure to
swi tch ASR on again when you no longe r need
l ess traction .
The following system s are integrated in the ESC:
Anti- lock braking s ystem (ABS )
ABS prevents the wheels from locki ng up when
braking. The vehicle ca n still be steered even dur­
i ng hard braki ng . Apply steady pressure to the
brake pedal. Do not pump t he pedal. A pu lsing in
t h e b ra ke peda l ind icates that the system is he lp­
i ng yo u to b ra ke the vehicle.
Brake assist system
The brake ass ist system can decrease brak ing dis ­
ta nce. It increases braking power when the d river
presses the bra ke peda l quickly in emergency sit­
u at ions. You must press and hold t he b ra ke peda l
u nt il t he s ituation is ove r. In vehicles with adap­
tive cru ise contro l*, the bra ke assist system is
more sensitive if the distance detected to the ve ­
hicle ahead is too sma ll.
Anti-slip regulation (ASR )
ASR reduces eng ine power when the d rive wheels
begin to spi n and adap ts the force to the ro ad
cond it ions . This makes it eas ie r to start, acce le r­
ate and drive up hills.
Electronic differential lock (EDL)
The EDL bra kes whee ls that a re spinn ing and
t ransfers the dr ive power to the othe r drive wheel
o r whee ls if the ve hicle is equippe d wi th a ll-wheel
drive*. T his function is not available at higher
speeds .

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In extreme cases, EDL a utomatica lly switches off
to help keep the brake on the braked whee l from
overheating. EDL w ill switch on again automati ­
cally when conditions have returned to normal.
Steering re commendat ion
The ESC helps to stabilize the ve hicle by chang ing
the steering torque.
I n vehicles with dynamic steeri ng*, ESC also
h e lps to stabilize the steering in critical s itua­
tions .
Electronic interaxle differential lock* /
sel ectiv e wheel torque control*
The electron ic in teraxle d iffe ren tial lock (front
wheel drive) or the selective wheel torq ue contro l
(all wheel drive) operates when driving through
curves. The front whee l on the ins ide of the cu rve
or both whee ls on the inside of the curve are
braked selectively as needed. Thi s allows more
precise driving in curves. The applicable system
may not activate when driving in wet or snowy
conditions .
_&, WARNING
- The ESC and its integrated systems cannot
overcome the laws of physics. This is espe­
ci al ly impo rtant on slippe ry or wet roads. If
the sys tems begin acting to stabilize your
Switching on/off
Smart Technology
veh icle, you shou ld immediately change
your speed to matc h the road and traffic
conditions. Do not let the increased safety
provided by these systems tempt you to
take risks . Do ing so will increase the risk of a
loss of vehicle control, collision and serious
personal injuries.
- Always adapt your speed to road, traffic and
weather conditions. The risk of losing con­
trol of the vehicle inc reases when dr iving
too fast, espec ially through curves and on
slippery or wet roads, and when dr iving too
close to vehicles up ahead . The ESC and its
integrated systems cannot a lways prevent
coll isions -there is sti ll a risk of accidents!
- Always accelerate with special care on even,
smooth su rfaces 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 always help to reduce
the risk of loss of vehicle cont rol.
{!) Tips
-ABS and ASR only work correct ly when a ll
four wheels are equipped w ith ident ica l
tires. Different tire sizes can lead to a reduc­
tion in engine power.
- You may hear noises when the systems de­
scribed are working.
ESC turns on automatically when you start the engine.
Fig. 153 Version A: lowe r ce nter console,~ OFF button
The ESC is designed to function in levels. Depend­
i ng on the level that is selected, the stabilization
function o f the ESC is limited or switched off . The
F ig. 154 Versio n B: uppe r ce nter console,~ OFF button
amount of s tabilization control will differ de­
pend ing on the level.
a, N N N ,.: CX) m
171

Smart Technology
The following situations are exceptions where it
may be usefu l to switch on sport mode to allow
the wheels to spin : -
Rocking the vehicle to free it when it is stuck
- Driv ing in deep snow or on loose ground
- Dr iv ing with snow chains
Sport mode on ESC/ASR off Sport mode off or
ESC /ASRon
Behavior
The ESC and ASR stabiliza- The stabilization funct ion is The full stabilization func-
tion fu nct ions are limited not
available¢ ,&.. ESC and
tion of the ESC and ASR is
¢ ,&. .
ASR are switched
off. available again.
Operation Press the I!> OF F! button Press and hold the I!> OF FI Press the I!> OF F! button
briefly . button longer than 3 sec-again.
onds .
Indicator II turns on. JI and lf'lii•li~ turn on. II turns off or II and
lights lf'lii•l~~ turn off.
Driver mes- Stabilization control (ESC): Stabilization control (ESC): Stabilization control
sages Sport. Warning! Re stricted off. Warning! Restricted (ESC):
On
stability stability
It is only possible to turn off the ASR up to 30
mph (SO km/h) for veh icles wi th front whee l
drive . At about
45 mph (70 km/h) it automatica l­
ly turns on again. It is possible to turn
off the
ASR at any speed for vehicles with all whee l
drive.
A WARNING
-
You should only sw itch sport mode on or
switch ESC/ASR
off if your driving ab ilities and
road condit io ns perm it .
- The stabilization function is limited when
sport mode is switched on. The dr iv ing
wheels could spin and the veh icle cou ld
swerve, especially on slick or slippery road
surfaces.
- There is no vehicle stabilization when ESC/
ASR are switched
off.
(D Tips
ESC/ASR cannot be switched off or sport
mode cannot be switched on when cruise con­
trol or adaptive cru ise control* is sw itched on .
172
Braking
What affects broking efficiency?
New brake pads
During the first 250 miles (400 km), new brake
pads do not possess their full braking effect, they
have to be "broken in" first¢,&. . You can com­
pensate for this slightly reduced braking power
by pushing harder on the brake pedal. Avoid
heavy braking loads during the break-in period.
Operating conditions and driving habits
The brakes on today's automobiles are still sub­
ject to wear, depending largely on operating con­
ditions and driving habits~,&. . On vehicles that
are either driven most ly in stop-and -go city traf­
fic or are driven hard, the brake pads should be
checked by your authorized Audi dealer more of­
ten than specified in the
Warranty & Mainte­
nance booklet .
Failure to have your brake pads
i nspected can result in reduced brake perform­
ance .
On steep slopes, you should use the braking ef­
fect of the engine . This way, you prevent unnec­
essary wear on the brake system. If you must use
your brakes, do not hold the brakes down contin­
uously. Pump the brakes at intervals.

Operating noise
Noises may occur when braking depending on the
speed, braking force and outside conditions such
as temperature and humidity.
Effect of water and road salt
In certain situat ions, for example after driving
through water, in heavy ra in, after overn ight con­
densat ion or after washing your car, the braking
effect can be reduced by moisture or ice on the
brake rotors and brake pads. The brakes must be
dried first with a few carefu l brake applications.
At higher speeds and with the w indshie ld w ipers
turned on, the brake pads press against the brake
rotors for a short amount of time. This occurs at
regular intervals without the driver noticing and
provides for better brake response time under
wet conditions.
The effectiveness of the brakes can be reduced
when the vehicle is driven on a salt-covered road
and the brakes are not used. Likewise, you clean
off accumulated salt coating from brake discs
and pads with a few cautious applications of the
brake ¢.& .
Corrosion
There may be a tendency for dirt to build up on
the brake pads and corros ion to form on the discs
if the car is not driven regularly or only for short
tr ips with little use of the brakes.
If the brakes are not used frequently, or if corro­
sion has formed on the discs, it is advisab le to
clean off the pads and discs by braking firmly a
few t imes from a moderately high speed¢.&.
Faults in the brake system
If you should notice a sudden increase in brake
pedal trave l, then one of the two brake circuits
may have failed
c:> .& .
Low brake fluid level
Malfunctions can occur in the brake system if the
brake fluid level is too low. The brake fluid leve l is
~ monitored e lectronically.
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Smart Technology
Brake booster
T he brake booster increases the pressure that you
generate w ith the brake pedal.
It works on ly
when the engine is running
.c:> .&
Brake lining wear status
Brake lining wear may be checked by visual in­
spect ion of the condition of the brake pads
through the openings in the wheel. If necessary,
the wheel may be removed for this inspection
c:> page 226, Replacing wheels.
_8 WARNING "'---
-New brake pads don't have the best stop­
pin g power and must be "broken-in" during
the initial 250 miles (400 kilometers). You
can compensate for this by press ing the
brake pedal more firmly. This also applies
later when new pads are installed.
-
- You shou ld perform braking maneuvers for
the purpose of cleaning the brake system
only if road conditions permit. Other road
users must not be put at r isk -you may
cause an acciden t!
- 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 over­
heat, premature wear and increased stop­
p in g distance.
- Under certain cl imatic and operat ing condi­
tions such as passing through water, dr iv ing
in heavy rain or after washing the vehicle,
the effectiveness of the brakes can be re­
duced. In winter, ice can accumulate on the
b rak e pads, linings, discs and drums. Care­
fully apply brakes for a test. Brakes will dry
and ice coatings will be cleaned off after a
few careful brake applications.
- Driving for an extended period of time on
salt -covered roads wi thout using your
brakes can a lso affect braking efficiency .
173