2015 AUDI A8 wheel

86 On the road
driving force has been built up at the
wheels.
E mergency brake function
An emergency brake ensures t hat the vehicle
can be slowed down even if the
normal brakes
fail
c::> page 87, Emergency braking .
&_ WARNING
Do not press the accelerator peda l inadver ­
tently if the vehicle is stationary but the
engine is running and a gear is selected.
Otherw ise the vehicle will start to move
immediately and could result in a crash.
- If the parking brake is applied with the
ignition switched off, the indicator lights
in the sw itch and . (USA models) .
(Canada models) in the instrument clus­
ter will go out after a certain per iod of
time.
- Occas iona l noises when the park ing
brake is applied and released are normal
and are not a cause for concern.
- When the vehicle is parked, the parking brake goes through a self-test cycle at
regular intervals. Any assoc iated noises
are no rma l.
Parking
.. Press the bra ke peda l to stop the vehicle .
.. Pull the switch© to set the parking brake .
.. Se lect the P selector lever position
c::> page 114.
.. Turn the eng ine off c::> ,& .
.. When on incl ines or declines, turn the steer­
ing wheel so that your vehicle will roll into
the curb if it begins to move.
&_ WARNING
- When you leave your veh icle - even if on­
ly b riefly - always take the ignition key
with you. This applies par tic u larly when
children remain in the veh icle . Otherw ise
the chi ldren could start the engine, re-
'
lease the parking brake or operate elec­
tr ica l equipment (e.g. power windows).
There is the r isk of an accident.
- When the veh icle is locked, no one - par­
ticularly not children should rema in in
the vehicle. Locked doors make it more difficult for emergency workers to get in­
to the vehicle - putting lives at risk.
Starting from rest
The starting assist function ensures that the
parking brake is released automatically upon
starting.
Stopping and applying par king brake
.. Pull the sw itch<®> to apply the parking
brake.
Sta rting and automaticall y rel easing the
park ing bra ke
.. When you start to drive as usual, the park­
ing brake is automat ically released and your
veh icle beg ins to move.
When stopping at a traffic signal or stopping in city traffic, the parking brake can be ap­
plied . The vehicle does not have to be held
with the footbrake. The parking brake elimi­ nates the tendency to creep w ith a dr ive range
engaged . As soon as you drive off as usual,
t h e pa rking brake is re leased automatically
and the vehicle s tarts to move .
Sta rting on slopes
When starting on inclines, the starting assist
prevents the vehicle from u nintent ionally roll­
i ng back. The braking force of the parki ng
brake is not re leased unti l suffic ient d riving
force has been built up at the w heels.
(D Tips
Fo r safety reasons, the pa rking brake is re­
l eased automatically on ly when the d riv ­
er's safety belt is engaged in the buckle.

,....,
N ,....,
N
0 J:
'SI: ,...., \!) 1.1'1 ,...., 1.1'1 ,....,
Starting off with a trailer
To prevent rolling back unintentionally on an
incline, do the following:
11-Keep the switch© pulled and depress the
accelerator. The parking brake stays applied
and prevents the vehicle from rolling back­
ward .
11-You can release the switch<®> once you are
su re that you a re develop ing enough for­
ward momentum at the wheels as you de­
press the accelerator.
D epending on the weight of the r ig (vehicle
and tra ile r) and the severi ty of the incl ine, you
may roll backwards as you start. Yo u can pre­
vent rolling backwards by holding the parking brake switch<®) p ulled out and acce lerating -
just as you would when starting on a hill with
a conventional hand brake.
Emergency braking
In the event that the conventional brake sys­
tem fails or locks.
11-In an emergency, pull the switch(®) and
contin ue to p ull it to slow your vehicle down
with the parking brake.
11-As soon as you release the switch (®) or ac-
ce lerate, the braking process stops.
If you pull the switch<®> and hold it above a
speed of about 5 mph (8 km/h), the emergen­
cy braking function is initiated. The vehicle is
braked at all four wheels by activating the hy­
draulic brake system. Th e brake performance
i s similar to making an emergency stop
~ &..
In order not to activate the emergency brak­
ing by m istake, an audible warning tone (buz­
ze r) sou nds when the switch C®> is pulled. As
soon as the switch(®) is released, or the accel­
e rator pedal is dep ressed, emergency b ra ki ng
stops.
_& WARNING
Emergency braking should only be used i n
an emergency, when the normal foot brake
has failed or the brake pedal is obstructed .
On the ro ad 87
Using the parking b rake to pe rform emer­
gency brak ing will slow your vehicle down
as if you had made a full brake application.
The laws of physics cannot be suspended
even with ESC and i ts associated compo­
nents (ABS, ASR, EDL). In corners and
when road o r weathe r cond itions are bad,
a full brake appl ication can ca use the vehi­
cle to sk id or the re ar end to break away -
risking an acciden t.
Start-Stop-System
' Description
Applies to vehicles: wit h Start -Stop-System
The Start-Stop-System can help increase fuel
economy and reduce CO2 emissions .
In the Start-Stop-mode, the engine shuts off
automat ica lly w hen the vehicle is stopped,
such as at a traffic light. The ignition remains
switched on du ring this stop phase. The en­
gine wi ll be automat ica lly restarted when
needed.
The last Start-Stop-System sett ing (on/off us­
ing the button
I O\l ~I) will be restored when the
i gnition is turned on. The L ED in the
1(7() .. 1 but­
ton turns on when the Star t-Stop-System is
swi tched off man ually.
Basic requirements for the Start -Stop
mode
- The d rive r's doo r is closed.
- The d river ' seat belt is latched .
- The hood is closed .
- The vehicle must have been driven faster
than
2.5 mph (4 km/h) since the last stop.
- A trailer is not hitched to the vehicle.
_& WARNING
-Never let the vehicle roll with the eng ine
sw itched off. You cou ld lose control over
the vehicle. Th is can lead to a collision
and serio us in ju ries.
- The brake booster and the steering sup­ port do not work while the engine is

88 On the road
switched off. More force is required to
stop and to steer the vehicle.
- To reduce the risk of injuries, make sure
that the Start-Stop-System is turned off
when working in the engine compart­
me nt¢
page 89.
(D Note
Always switch off the Start-Stop -System
when driving through water ¢
page 89.
Starting/stopping the engine
Applies to vehicles: with Start-Stop-System
Fig . 91 In strument duster : eng ine switc hed off (stop
phase)
~ Slow the vehicle to a stop using the brake
and keep pressing the brake pedal. The en­
gine w ill switch off. The
11] indicator light
appears in the information line in the instru­
ment cluster display.
~ When you take your foot off the brake ped­
al, the engine restarts . The ind icator light
turns off.
Additional information
The engine w ill switch off in the P, D, N and S
positions as well as in manua l mode. In the P
position, the e ngine will also remain off if you
take your foot off the brake pedal. The engine
starts again when you select another se lector
lever position and take your foot off the brake
pedal.
If you select the R position during a Stop
phase, the engine will start again .
Shift from D to P quickly to prevent the engine
from starting unintentionally when shifting
through R. You
can determine for yourself if the engine
will stop or not by reducing or increasing the
amount of force you use to press the brake
pedal. For example, if you only lightly press
on the brake pedal in stop-and and-go traffic
or when turning, the engine will not switch off
when the vehicle is stationary. As soon as you
press the brake down harder, the engine wi ll
switch off.
General information
Applies to vehicles: with Start-Stop-System
The standard Start-Stop-mode can be cancel­
led for different system-related reasons.
Fig. 92 Instrument cluster: eng ine -Stop temporarily
unavailable
Engine will not switch off
Before each stop phase, the system checks if
certain conditions have been met. For exam­
ple, the eng ine will
not be switched off in the
following situations:
- The engine has not reached the minimum
requ ired temperature for Start-Stop-mode.
- The interior temperature selected by the A/C
system has not been reached.
- The outside temperature is extremely high/
low.
- The windshield is being defrosted
¢page 81.
-The parking system* is switched on.
- The battery charge level is too low.
- The steering wheel is sharply turned or
there is a steering movement.
- After engaging the reverse gear.
- On sharp incl ines.

Audi adapt ive crui se c ontrol an d bra kin g guard 9 3
vehicles or obstacles that are not moving
can trigger a collision warning and if con­
firmed by the video camera, an acute col­ lis ion warn ing.
- For safety reasons, do not use adaptive
cruise control when driving on roads with
many curves, when the road surface is in
poor condit ion and/or in bad weather
(such as ice, fog, gravel, heavy rain and
hydroplan ing). Using the system under
these cond itions cou ld result in a co lli ­
sion .
- Switch adaptive c ruise control off tempo­
rar ily when driv ing in turning lanes, on
expressway exits or in construction
zones . This prevents the vehicle from ac­
celerating to the set speed when in these
situations .
- The adapt ive cru ise control system w ill
not brake by itse lf if you put your foot on
the accelerator pedal. Doing so can over­ ride the speed and distance regulation .
- When approaching stationary objects such as stopped traffic, adaptive cruise
control will not respond and braking
guard w ill have limited function.
- The adapt ive cruise control system and
braking guard do not react to people , an­
ima ls, objects crossing the road o r on­
coming objects .
- The function of the radar sensors can be
affected by reflective objects such as
guard ra ils, the entra nce to a tunnel,
heavy rain or i ce.
- Never follow a veh icle so closely that you
cannot stop your vehicle safe ly. The
adaptive cruise cont ro l c anno t slow or
brake the veh icle safely when you follow
another vehicle too closely. Always re­
member that the automatic braking
funct ion cannot bring the veh icle to a
sudden or emergency stop under these
conditions .
- To prevent unintended operation, always
switch ACC off when it is not being used. (D Note
The sensors can be displaced by impacts or
damage to the bumper, wheel housing and underbody. That cou ld affect the adaptive
cruise control system and brak ing guard .
Have your authorized Aud i dea ler or a u­
thorized Audi Serv ice Facility check their
funct ion.
In curves
Applies to vehicles: with Audi adaptive cruise control
I
F ig. 9 7 Exampl e: dri vin g in to a curve
When dr iving into a curve c:> fig. 97 and out of
a cu rve, the ad aptive cruise con trol m ay react
to a vehicle in the next lane and apply the
brakes . You can override or prevent the brak­
i ng by pressing the accelerator pedal b riefly.
Stationary objects
Applies to vehicles: with Audi adaptive cruise control
Fig. 98 Ex ampl e: object chang ing l anes and s ta tio nar y
objec t
The adaptive cru ise con tro l system only reacts
to objects that a re mov ing o r th at the system
has a lready detected as moving . For examp le,
if a vehicle @, which has a lready been detect-
ed by the adaptive c ruise contro l, tu rns o r
changes lane s and another stationary vehicle .,._

Audi adaptive cruise control and braking guard 95
tachometer @and is also shown briefly in
thedisplay @c::>fig.101.
.. You must also press the brake pedal when
the vehicle is stopped.
Switching 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 cru ise contro l is switched on.
No vehicles are detec ted up ahead. The stored
speed is ma intained.
• -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 automatical ly.
fit -Adaptive cruise contro l is switched on. A
mov ing vehicle up ahead was detected. Your
vehicle remains stopped.
• -When automatic brak ing is not able to
keep enough distance to a previously detected
moving vehicle up ahead, you must take con­
trol and brake
c::> page 97, Prompt for driver
intervention.
© Display
If adaptive cruise control is not shown in the
d isp lay, you can call it up with the multifunc­
tion steering wheel buttons c::>
page 23.
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 d is­
tance is.
No vehicle · No veh icle ahead was detected .
White vehicle -A vehicle ahead was detected.
Red vehicle -Prompt for the driver to take ac­
tion
<=:> page 97.
Both
arrow s on the scale© indicate the dis­
tance to the vehicle ahead. No arrow 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
c::> page 96. If the
distance selected is too close or may soon be­
come too close, the arrows move into the red
zone on the sca le .
A WARNING
Improper use of the adaptive cruise con­
trol can cause collisions, other accidents
and serious personal injur ies .
- Pressing the
!SET ! button when driv ing at
speeds below 20 mph (30 km/h), will au­
tomatically accelerate the vehicle to 20
mph (30 km/h), which is the minimum
speed that can be set.
(D Tips
-If you switch the ignit ion or the adaptive
cruise control off, the set speed is erased
from the system memory.
- You cannot switch the Electronic Stabili­
zation Control (ESC) to the SPORT mode
when adaptive cruise control is switched
on.
Changing the speed
Applies to vehicles: with Aud i adapt ive crui se control
0
f
• 0
Fig. 102 Selector lever: ch ang ing the speed
.. To increase or reduce the speed in incre­
ments,
tap the lever up or down.
-0:, N 0 ± ... a)
.. To increase or reduce the speed quickly, hold
the lever up or down until the red LED @
reaches the desired speed
c::> page 94,
fig.101. ~

,....,
N ,....,
N
0 J:
'SI: ,...., \!) 1.1'1 ,...., 1.1'1 ,....,
Audi active Lane assist
Active Lane assist
Description
Applies to vehicles: with active lane assist
Active lane assist helps you keep your vehicle
in your lane.
Active lane assist detects lane marker lines
within the limits of the system using a camera in the windshield . If you are approaching a de­
tected lane marker line and it appears likely
that you w ill leave the lane, the system will
warn you by means of corrective steer ing . T he
driver can over ride the cor re ct ive steer ing at
any time. If the veh icle crosses a line, the d riv­
er is also warned by a light
vibration in the
steering whee l. The vibration warning must
be switched on in the MMI for this to happen.
Active lane ass ist is operable when the line
marking the lane is detected on at least one
side of the vehicle .
The system is designed for driv ing on free ­
ways and expanded highways and thus works only at speeds of 40 mph (65 km/h) or more .
Applies to vehicles with side assist* : If you ac­
tivate your turn s ignal when active lane assist
is ready and when activated side assist has
classified a lane change as crit ica l because of
vehicles traveling alongside you or comi ng
closer, there will be noticeable correct ive
steer ing just before you leave the lane . This is
done to try to keep your veh icle in the lane.
Applies to vehicles w ithout s ide ass ist*: when
the system is ready, it does not warn you if
you act ivate your turn signa l before driving
across a lane marker line . In this case, it as­
sume s that yo u are ch ang ing lanes intent ion­
a lly.
I f the vehicle is also equipped with Audi adap­
tive cruise cont ro l*, the co rrec tive steering
will be mo re specific in rega rd to the driving
situation. In addition to the lane marker lines,
the system can a lso take into account other
objects such as guard rails . If they are detect­
ed in close proximity to the veh ic le, Audi ac-
Audi acti ve lane a ssis t 10 1
tive lane assist he lps prevent the vehicle from
driving too close to them. There is a lso pass­
ing ass istance . The system does not provide
any correct ive steering if it detects that you
are passing another vehicle.
A WARNING
- The system warns the drive r that the ve­
hicle is leaving the lane using co rrect ive
s teer ing . The d river is always r esponsible
for keeping the vehicle withi n the lane.
- The system can assist the dr iver in keep­
i n g the vehicle in the lane, but it does
not steer by itself. A lway s keep yo ur
h a nds on the steering wheel.
- Cor rective s teer ing may not occur in cer­
tain sit uat ions, such as dur ing heavy
bra king.
- Th e camera does not recogni ze all lane
marker lines. Cor rective s teer ing ca n only
take p lace on the side of the vehi cle
where lane marke r lines are detected.
- Othe r road str uctures o r objects co uld
possibly be identified unintentiona lly as
lane ma rker lines . As a res ult, corrective
steering may be unexpected or may not
occ ur.
- The camera view can be restricted, for
examp le by vehicles driving ahead or by
ra in, snow, heavy spray or light shining
into the camera . Th is can result in act ive
lane assis t not detecti ng the lane marke r
lines or detect ing them inco rrectly.
- Unde r ce rtain conditions such as ruts in
the road, a banked roadway or cross­
winds, the co rrective stee ring alone may
not be enough to keep the vehicle in the
lane.
- For safety reasons, active lane ass ist
m ust not be u sed w hen the re a re poor
road and/or weat her condi tions such as
slippe ry roads, fog, grave l, heavy rain,
snow an d the potential for hydroplaning .
Using active lane assist under these con­
ditions may increase the risk of a crash.

102 Audi active lane assist
Activating and deactivating
Applies to vehicles: with active lane assist
-
I
Fig. 107 Turn signal lever: Act ive lan e ass ist button
Fig. 108 Windshield: Active lane assist camera viewin g
win dow
~ Press the ¢ fig. 10 7 button to activate or
deactivate the system . The indicator light
• or. in the instrument cluster will illu­
minate or go out.
Instrument cluster indicator light
• Ready: The indicator light shows that the
system is ready to use . The system can now
warn you if you are about to cross a known
lane marker line .
• Not ready: The ind icator light shows that
the system is turned on but unable to send a
warning . This can be due to the following :
- There is no lane marker line .
- The relevant lane marker lines are not de-
tected (for example, markings in a construc­
tion zone or because they are obstructed by
snow, dirt, water or backlight ing).
- The vehicle 's speed is below the speed need ­
ed to activate it, which is about 40 mph (65
km/h) .
- The lane is narrower than about 8 ft . (2 .5 m)
or wider than 15 ft (4 .5 m).
- The curve is too sharp . - The driver's hands are not on the steering
wheel.
(D Tips
Make sure the camera's field of view
¢
fig. 108 is not obstructed by stickers,
deposits or anything else. For information
on cleaning, refer to
¢ page 214 .
Active lane assist display in the
instrument cluster
Applies to vehicles: wit h active lane assist
Fig. 109 D isp lay : Act iv e lane ass ist is swi tc h ed on a nd
is wa rnin g
Fig. 110 Instrumen t cl uster: Active lane as sis t is
s witch ed o n but not re ad y to provid e wa rnin gs
You can call up the active lane assist display
using the buttons in the multifunction steer­
ing wheel ¢
pag e 23.
When active lane assist is switched on, the
system indicates which lines are detected by
displaying solid lines on the left and/or right
side of your vehicle :
ll>

,....,
N ,....,
N
0 J:
'SI: ,...., \!) 1.1'1 ,...., 1.1'1 ,....,
White Active l ane assist is sw itched on
line(s) and ready to p rov ide warnings
on the side that is ind icated
¢ fig. 109 .
Red line Act ive lane assist is warning you
(left or that you are about to leave your
right) lane
¢ fig . 109. In addition, the
steeri ng wheel vibrates s light ly.
Gray Act ive l ane assist is switched on
line(s) but is not ready to provide warn-
ings
¢ fig . 110.
Mes sages in the instrument clu ster
display
When the active lane ass ist turns off automat ­
ically, the i nstrument cluster ind icator goes
out and one of the fo llow ing messages ap­
pears on the display :
Audi active lane a ssist : Curr ently un availa­
bl e. No camera view
This message appears if the camera is no lon­
ger funct ional after the system has cont inous­
ly failed to detect the lane markings . This
could happen if :
- The camera field of view¢
page 102,
fig. 108 is dirty or covered in ice. Clean the
area on the w indshield .
- The camera field of view is fogged over. Wait
until the fog has cleared before switching
active lane assist on .
- The system has been unable to detect the
lanes for an extended period of time due to
road cond it ions . Switch active lane ass ist
back on when the lines are more visible .
Audi active lane a ssist : Currently un available
A temporary ma lf u nction is preventing lane
assist from operating. Try sw itching active
lane assist on again later.
Audi acti ve lane a ssist : S ys tem fault!
Drive to you r autho rized Aud i dea le r soon to
h ave the ma lfunction co rrec ted.
Audi active lane a ssis t: Pl ea se take over
s te ering
Audi acti ve lane a ssis t 103
This message appears if yo u do not s teer the
vehicle yourself . If this is the case, active lane
ass ist does not switch off, b ut it does sw itch
to the "not ready" stat us. The system can help
you keep the vehicle in the lane. However it is
your own responsibility to steer and control
t h e ve hicle .
Setting the steering wheel vibration
Applies to veh icles: w ith active la n e assist
11> Select: !CAR ! function button> (Car )* sys­
tem s
control button > Driver a ssis t > Aud i
a ctive lan e as sis t.
You can switch the vibrat ing warn ing in t he
stee ring wheel
o n or off .
(D Tips
Your setting is a utomat ically stored and
assigned to the remote control key being
used.