brake light AUDI A8 2013 User Guide

the stored position as soon as you switch on
the ignition.
Starting and stopping
the engine
Starting the engine
This button switches on the ignition and
starts the engine.
Fig. 85 Center console: S TART ENGINE S TOP b utton
Switching the ignition on/off
• To switch the ignition on/off, press the
I START ENGINE STOPI button. Do not press
the brake pedal while doing this.
Starting the engine
• Press the brake pedal QA .
• Press the !START ENGINE STOPI button
Q fig . 85. The engine will start.
If the engine does not start immediately, the
starting process is automatically stopped af­
ter a short time. Repeat starting procedure.
Start-Stop-System*:
When you stop and the Start -Stop -System*
turns off the engine, the ignition still remains
switched on.
- If you press the !S TART ENGINE STOPI but­
ton now, the ignition will be switched off.
The engine will not start
¢page 89.
- Make sure that the ignit ion is switched off
before exiting the vehicle.
Switching the ignition/engine off
automatically*
The follow ing applies to vehicles with Start­
Stop-System*: to prevent the battery from
On the road 83
draining, the ignition and the engine will
switch off automatically under the following
cond itions:
- The vehicle has already been driven.
- The driver's door is opened.
- The driver's seat belt is removed .
- The brake pedal is not pressed down.
- The vehicle is stationary.
In this case, the activated low beam will be re­
placed by the side marker lights. The side
marker lights will switch off after a certain pe­
riod of time or when you lock the vehicle .
A WARNING
-Never allow the engine to run in conf ined
spaces -danger of asphyx iation.
- Never turn off the engine until the vehi­
cle has come to a complete stop.
- The brake booster and power steering
only work when the engine is running. If
the engine is off, you have to use more
force when steering or braking. Because
you cannot steer and brake as you usual­
ly would, this could lead to crashes and
serio us injuries.
(D Note
- Avo id h igh engine rpm, full throttle and
heavy engine loads until the engine has
reached operating temperature - other­
w ise you risk engine damage.
- The engine cannot be started by pushing
or towing the vehicle.
@ Tips
-After a co ld engine is started, there may
be a brief period of inc reased noise be­
cause oil pressure must first build up in
the hydraulic valve adjusters. This is nor­
ma l and not a cause for concern.
-If you leave the vehicle with the ignition
switched on, the ignition w ill switch off
after a certain period of time. Please
note that electrical equipment such as
exterior lights will sw itch off as well
when that happens.

84 On th e road
Stopping the engine
• Bring your vehicle to a complete stop.
• Move the selecto r lever to the P or N posi­
t ion .
• Pre ss the I START ENGINE STOP I button
¢ page 83, fig. 85.
When you s top and the Sta rt- Stop -Sys tem*
turns off the engine, the ignit ion remains on .
Press the
I STAR T ENGINE ST OP I button to
switch the ignition off during a stop phase.
Steering lock
The stee ring lo cks w hen you t urn the engine
off using the
I S TART ENGINE STOP I button
and open the dr iver's door . The locked steer­
ing helps prevent vehicle theft .
Emergency off
If necessary, the eng ine ca n be sw itched off
with the selector lever in the R, Dor S pos i­
tions . The eng ine stops if you press the
I START ENGINE STOP ! button at speeds be low
6 mph (10 km/h) .
A WARNING
-Never turn off the engine before the ve­
hicle has come to a complete stop. The
full function of the brake booster and the power steering is not quara nteed. You
must use more force to turn or b rake if
necessary. Because you cannot stee r and
brake as you usua lly would, th is could
lead to c rashes and serious injur ies.
- For safety reasons, you shou ld always
par k your vehicle with the se lector lever
in P. Otherwise, the ve hicle co uld i nad­
vertent ly roll away .
- After the engine has been switched off,
the radia tor fan can continue to run fo r
up to 10 min utes -even with the ign it ion
switched off. It can a lso switch on again
after some time if the coolant tempera­
ture rises as the result of a heat buildup
or if the engine is hot and the engine
compartment is addit ionally heated by
the su n's rays.
(D Note
Do not stop the eng ine immediately after
hard or extended driving . Keep the eng ine
runn ing for approximate ly two minutes to
prevent excess ive heat bu ild-up.
Driver message in the instrument
cluster display
Ignition i s on
This message appears and a warning tone
sounds if you open the driver's door when the
ignition is sw itched on.
Press brake pedal to start eng ine
This message appears if you press the
I START ENGINE STOPI button to start the en­
gine and do not depress the brake pedal. The
engine can only be started if the brake pedal
is depressed .
!!I Is key in the vehicle ?
If the indicator ligh t turns on and the mes­
sage appears, the remote control key was re­
moved from the vehicle whi le the engine was
runn ing . If the ignition key is not in the veh i­
cle you will not be able to switch on the igni­
tion or restart the engine after it has bee n
switched off . You will also not be able to lock
the ve hicle from the outs ide .
Shift to P , othe rwise v ehicle can roll away.
Doors do not lock if le ver is not in P .
This driver message appears for safety rea ­
sons if the transmission has not been shifted
to the P position when you switc h the ignition
off . Move the selector lever to the P position.
O therwise the vehicle is not p rotected from
r o ll ing a nd ca nnot be locked.
rJl Ke y i s not recognized . Hold back of ke y
aga inst marked area. See owner's manual.
If the indicator light turns on and this mes­
sage appears, there is a malfunct ion
¢ page 85.
Tu rn off ignition before leaving c ar

This message appears if the driver's door is
opened while the ignition is switched on . Al­
ways sw itch
off the ignition if you are leaving
the vehicle . See also
<=:> page 83.
Shift to P and turn off ignition before leav­
ing car , otherwise vehicle can roll away
This message appears if the driver's door is
opened while the ignition is sw itched on and
the selector lever is not in the P position. Shift
the selector lever into the P position and
sw itch
off the ign ition when you ex it the vehi­
cle . Otherwise the vehicle could ro ll. See al so
¢page 83.
Starting the engine if there is a
malfunction
It may not be possible to start the engine un ­
der certain circumstances, for example if the
battery in the vehicle key is drained, if inter­
ference has affected the key or if there is a
system malfunction .
I
----- ~
Fig . 86 Ce nter conso le /maste r key: starting th e en gine
if th ere is a malfunction
Requirement : The message Key not recog­
nized. Hold back of key against marked area.
See owner's manual.
must appear and the in­
d icato r
light m) must switch on.
• Hold the master key vert ical ly in the loca­
t ion indicated
y>l) c::> fig. 86.
• Press the brake pedal c::> &. in Starting the
engine on page 83.
... press the ""I s=-= T,,.,A -= R=-= T =- E= N ,-,..,= G=I '""' N -=E '""'s=-= T,,., O""' P""' I button .
The engine will start .
• Drive to your authorized Audi dealer imme­
diately to have the malfunction correc ted .
On the road 85
@ Tips
You can view the message again by press­
i ng the
I START ENGINE STOP! button.
Electromechanical
parking brake
Operation
The electromechanical parking brake replaces
the hand brake.
Fig. 87 Center co nsole: Parking b rake
• Pull on the switch C®l ¢ fig. 87 ® to apply
the parking brake. The indicator light in the
switch illuminates.
• Step on the brake pedal or the accelerator
pedal and press the switch ©lat the same
time to release the park ing brake. The indi­
cator light in the switch goes out.
Your vehicle is equipped with an electrome­ chanical parking brake . The parking brake is
designed to prevent the veh icle from rolling
unintentionally and replaces the hand brake .
In add ition to the normal functions of a tradi­
tional hand brake, the electromechanical
parking brake provides various convenience
and safety functions.
When starting from rest
-The integral starting a ss ist helps you when
dr iving by automatically releasing the park­
ing brake
¢ page 86, Starting from rest .
-When starting on inclines, the starting as -
sist prevents the vehicle from unintentional-
ly rolling back. The braking force of the
park ing brake is not re leased until sufficient
1111-

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 .
Indicator lights
-If the parking b rake is closed w ith the igni­
t ion
sw itch ed on the indicator lights come
on - (USA models)/ . (Canada models)
i n the i nstr ument cluster and in the switch .
- If the par king brake is closed w ith the igni­
t ion
s wit ched off the indicato r lights come
on - (USA models)/ . (Canada models)
in the instrument cluster and in the switch
for about 20 seconds.
.&_ WARNING
Do not press the accelerator peda l inadver­
tently if the vehicle is stat ionary but the
eng ine is running and a gear is selected.
Otherw ise the vehicle will start to move
immed iate ly and could result in a crash .
@ Note
If the symbo l. in the display or the ind i­
cator light
1111 (USA models) . (Cana­
da models) in the instrument cluster flash­
es, there is a malfunction in the brake sys­
tem . Please refer to the detai led descrip­
tion of the indicator lights
c::> page 14.
- If the indicato r light - (USA mod-
els) . (Canada mode ls) or
liJ turns
on, there may be a malfunction in the parking b rake
c::> poge 15.
(D Tips
- You can apply the pa rking brake at any
t ime - even w ith the ignition switched
off . T he ignit ion must be on in order to
r elease the parking brake.
- Occ asiona l noises when the par king
brake is applied and re leased are no rma l
and are not a ca use for concern .
- When the vehicle is par ked, the par king
brake goes through a se lf -test cycle at regu
lar interva ls. Any associated noises
are normal.
Parking
Parking
.,. Stop the vehicle with the foot brake .
.,. Pull the switch(®) to apply the parking
brake.
.,. Select the P selector lever position
c::>page 115.
.,. Turn the engine off c::> _&. .
In addit ion on inclin es and g rades
.,. Turn the steering whee l so that your vehicle
w ill roll aga inst the curb in ca se it should
start to move.
.&_ WARNING
- When you leave your vehicle - even if on­
ly br iefly - always take the ignit io n key
wit h you. This applies pa rticularly when
children remain in the vehicle. Otherwise
the children co uld s tart the engine, re­
lease the parking brake or operate elec ­
trica l equipment (e.g . power windows) .
There is the r isk o f an accident.
- When the vehicle is locked, no one - par­
ticularly not children should rema in in
the vehicle. Locked doors make it more
d ifficult for emergency workers to get in­
to the vehicle - putting lives at risk .
· Starting from rest
The starting assist function ensures that the
parking broke is released au tomatically upon
star ting.
Stopping a nd applying parking brak e
.,. Pull the switch(®) to apply the parking
brake.
St arting and automatically releasing the
parking brake
.,. When you start to drive as usual , the park­
ing brake is a utomatically rel eased and your
vehicle beg ins to move. ..,..

88 On the road
switched on during this stop phase. The en ­
gine will be automatically restarted when
needed.
The last Sta rt-Stop -System setti ng (on/off us­
ing the button
l(A) ,.,I) wi ll be restored when the
ignition is turned on. The LED in the
l(A) "'I but­
ton turns on when the Start-Stop -System is
switched off manua lly.
Basic requirements for the Start-Stop
mode
- The driver's door is closed .
- The driver' seat be lt is latc hed.
- T he hood is closed.
- T he veh icle must have been driven faster
than 2.5 mph (4 km/h) since the last stop.
- A trai ler is not hitched to the vehicle.
A WARNING
-Never let the vehicle roll with the engine
switched off. You could lose cont rol over
the vehicle . This can lead to a coll ision
and serious injuries .
- Th e brake booster and the steer ing sup­
port do not work while the eng ine is
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
ment¢
page 89.
(D Note
Always switch off the Start-Stop -System
when driv ing th rough water~
page 89.
Starting/stopping the engine
Applies to vehicles: w ith Start -Stop -System
Fig. 88 Instrument clus ter: engine sw itche d off (s top
phase)
.. Slow the veh icle to a stop using the brake
and keep pressing the brake pedal. The en­
g in e will sw itch off. The
D] 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 indicator light
turns off.
Additional information
The engine will switch off in the P, D, N and S
positions as well as in manual mode . In the P
pos ition, the engine wi ll also remain off if you
take yo ur foot off the brake pedal. The engine
starts again when you select another selector 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 un intentionally when sh ifting
through R.
You can determine for yourself if the engine
will stop or not by reducing or increasin g 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 veh icle is stationary. As soon as you
press the brake down ha rder, the engine wi ll
swit ch off. ..,

@ Tips
When you stop and the start-stop-system
turns the engine off, the ignition remains on. Make sure that the ign ition is switched
off before exiting the vehicle.
General information
App lies to vehicles: with Start-Stop-System
The standard Start-Stop-mode can be cancel·
led for different system-related reasons.
Fig. 89 Instrument cluster : eng ine-Stop temporar ily
u navailable
Engine will not switch off
Before each stop phase, the system checks if
certain cond itions have been met . For exam­
p le, the engine will
not be switched off in the
following situations:
- The engine has not reached the minimum
required temperature for Start -Stop-mode .
- The interio r temperature selected by the A/C
system has not been reached.
- Th e outside temperature is extremely h igh/
low.
- The windshield is being defrosted
9page 81.
- The parking system* is switched on.
- The battery charge level is too low .
- The steering wheel is sharply turned or there is a steer ing movement.
- After engaging the reverse gear.
- On sharp inclines .
The
(jj indicator light appears in the informa­
tion line in the instrument cluster display
9fig. 89.
On the road 89
Engine automatically restarts
The stop phase is interrupted in the following
situations, for example. The engine restarts
without any action by the driver.
- The interior temperature varies from the
temperature selected in the A/C system.
- The windsh ield is being defrosted
9page 81.
-The brake pedal is pressed severa l times in a
row.
- The battery charge level becomes too low .
- High power consumpt ion.
@ Tips
If you shift into the D, Nor S positions af­
ter sh ifting into
reverse, the vehicle must
be driven faster than 6 mph (10 km/h) in
order for the engine to sw itch off aga in.
Switching the Start-Stop-System on/off
manually
App lies to vehicles: wi th Start-Stop-Sys te m
If you do not wish to use the system, you can
switch it off manually.
Fig. 90 Center console: Start-Stop-System button
.,. To switch the Start-Stop-System off/on
manually, press the
l "'I button. The LED in
the button turns on when the system is
sw itched off.
@ Tips
If you switch the system off during a stop
phase, the engine will start again auto­
matically.

The stored speed and the indicator light
A;(l)~i4 (US mode ls) 8 (Canad ian mode ls) ap­
pear in the instrument cluster d isp lay
¢ fig. 92. The display may vary, depending on
t he type of d isplay in your vehicle.
The speed is k ept constant via an engine out­
put adjustment or act ive brake intervention .
A WARNING
-Always pay attention to traffic even when
the cruise control is switched on . You are
always responsible for your speed and
the distance between your vehicle and other vehicles.
- For safety reasons, the cruise control
should not be used in the city, in stop­
and-go traff ic, on twisting roads and
when road conditions are poor (such as
ice, fog, grave l, heavy rain and hydro ­
planing) -risk of accident .
- Turn off the cruise control temporari ly
when entering turn lanes, highway exit lanes or in construction zones.
- Please note that inadvertently "rest ing "
yo ur foot on the accelerator peda l causes
the cruise control not to brake. This is
because the cruise control is overridden
by the driver's acce leration.
- If a brake system malfunction such as
overheating occurs when the cruise con­
trol system is sw itched on, the braking
function in the system may be switched
off. The other cruise control functions re­
main active as long as the indicator light
[~jlQ~i4 (US models) I ii (Canad ian mod­
els) is on.
The brake lights illuminate as soon as the brakes decelerate automat ically .
Changing speed
" To increase/dec rease the speed in incre­
ments , tap the lever in the
0 10 d irection
¢ page 90, fig. 91 .
On the ro ad 91
" To increase/decrease the speed quick ly,
hold the lever in the
0 10 direction until
the desired speed is displayed.
You can also press the accelerator pedal down
to increase your speed, e.g . if you want to
pass someone . The speed you saved earlier
will resume as soon as you release the accele r­
ator pedal.
If, however, you exceed your saved speed by
6 mph (10 km/h) for longer than S minutes,
the cruise contro l wi ll turn off temporari ly.
The green symbol
A;(l )~i4 (US models) 8 i n
the d isplay is replaced with a white symbol.
The saved speed remains the same .
Presetting your speed
You can preset your desired speed while the
vehicle is not moving .
" Switch on the ignition.
" Pull lever into posit ion
(D ¢ page 90,
fig . 91 .
" Press the lever in the 0 or 0 direction to
increase or decrease your speed .
" Release the lever to save that speed.
This function makes it possible, for example,
to save the speed you want before dr iving on
the h ighway. Once on the highway, act ivate
the cru ise con trol by pulling the lever toward
(D .
Switching the system off
T e mpor ary dea ctivat ion
" Press the brake pedal , or
" Press the lever into position @(not clicked
into place)
¢ page 90, fig. 91 , or
" Drive for longer than 5 minutes at more
than 5 mph (10 km/h) above the stored
speed.
S w itching off complet ely
" Press lever into position @(clicked into
place), or
" Switch the ignition off .

96 Audi adaptive cruise control and braking guard
• 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 p lace. The message
ACC off appears.
@ Indicator lights
II-Adaptive cruise control is switched on . No
vehicles are detected up ahead. The stored
speed is maintained.
I-A moving vehicle is detected up ahead .
The adaptive cruise control system regulates
the speed and d istance to the moving vehicle
ahead and acce lerates/brakes automatica lly.
S, -Adaptive cruise contro l is switched o n. A
mov ing vehicle up ahead was detected. Your
vehicle remains stopped .
I-When au tomatic braking is not able to
keep enough distance to a p reviously detected
mov ing vehicle up ahead, you must take con­
trol and brake ¢
page 98 , Prompt for driver
intervention.
© Display
If adap tive cruise control is not shown in the
d isplay, you can call it up with the multifunc ­
tion steering wheel buttons~
page 23.
Based on the symbols in the display , you can
determ ine if the system is maintaining a dis­
tance to the vehicle ahead and w hat 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 98 .
Both arrows 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 d istance. For information on changing the stored distance, refer to
¢
page 97. If the
distance se lected is too close or may soon be­
come too close, the arrows move into the red
z one 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 driving at
speeds below
20 mph (30 km/h), w ill 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 Electron ic Stabili­
zation Control (ESC) to the SPORT mode
when adaptive cruise control is switched
on .
Changing the speed
Applies to vehicles: with Audi adaptive cruise control
0
f
• 0
Fig. 99 Selecto r lever : chang ing t he spee d
• To increase or reduce the speed in incre ­
ments,
tap the lever up or down.
-
-a)
N
q :r
~
"' To increase or reduce the speed qu ickly,
hold the lever up or down until the red L ED
@ reaches the desired speed ¢ page 95,
fig . 98.
Following any changes, the new stored speed
will be displayed briefly in the display @
¢ page 95 , fig. 98.

98 Audi adapti ve cruise control and bra king gu ard
then maintains the stored distance. If the ve­
hicle ahead accelerates, adaptive cruise con­
trol will also acce lerate up to the stored
speed.
The higher the speed, the greater the distance
in yards (meters)¢ ,&. T he
Di sta nc e 3 setting
is recommended .
The distances p rov ided are specified values.
D epending on the driving situation and the
how the vehicle ahead is driving, the actual
distance may be more or less than these tar­
get distances.
The various symbols for the time increments
appear briefly in the information line@
¢
page 95, fig. 98 when you change the set­
tings.
~ -~ --- Dis tance 1 : This setting corre­
sponds to a distance of 92 feet/28 meters
when traveling at 62 mph (100 km/h), or a
time interva l of 1 second.
~ -- ~-- Dista nc e 2: This setting corre­
sponds to a distance of 1 18 feet/36 meters
when traveling at 62 mph (100 km/h), or a
time interva l of 1.3 seconds.
~ --- ~-Dis ta nce 3: This setting corre­
sponds to a distance of 164 feet/SO meters
when traveling at 62 mph (100 km/h), or a
time interva l of 1.8 seconds.
~---- ~ Dista nce 4 : This setting corre­
sponds to a distance of 210 feet/64 meters
when traveling at 62 mph (100 km/h), or a
time interva l of 2 .3 seconds.
A WARNING
Following other vehicles too closely in­
creases the risk of collisions and serious
personal inju ry.
- Setting short distances to the traffic
ahead reduces the t ime and distance
available to br ing your vehicle to a safe
stop and makes it even mo re necessa ry
to pay close attention to traffic.
- Always obey applicable traffic laws, use
good judgment, and select a safe follow- ing distance for the traffic, road and
weather conditions.
(D Tips
- Distan ce 3 is set automatically each time
you switch the ignition on .
- Your standard settings a re automatically
stored and assigned to the remote con­
tro l key being used.
Selecting the driving mode
Applies to vehicles: with Aud i adapt ive cru ise control
.. Select the desired driving mode in drive se­
lect¢
page 109 .
(D Tips
Your settings are automatically stored and
assigned to the remote control key being
used.
Prompt for driver intervention
Applies to vehicles: with Aud i adapt ive cru ise contro l
Fig. 1 02 In strument cluster: request for driver inte r­
vent ion
In certa in situations, the system will prompt
you to take action . Th is could happen, for ex­
amp le, if braking by the adaptive c ruise con­
tro l system is not enough to mai nta in enough
dis tance to the veh icle ahead .
The ind icator light
I and the symbol in the
display will warn you abo ut the s ituation
¢
fig. 102. You will also hea r an acous tic sig­
nal.
- Press the brake pedal to slow your vehicle
down.

Audi adaptive cruise control and braking guard 99
Audi braking guard
Description
Applies to vehicles: with Audi adaptive cruise control
Fig. 103 Instrumen t cl uste r: ap proac h warn ing
Braking guard uses radar sensors and a video
camera . It a lso functions within the lim its of
the system whe n adapt ive cruise control is
switched off .
What can braking guard do? When detected in time, the system can assess
situations when a vehicle ahead brakes sud­
denly or if y our own veh icle is traveling at a
high speed and approaching a veh icle up
ahead that is moving more slowly . Bra king
g ua rd does not react if i t cannot detect th e
si tuation.
The system advises you of va rious 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 col lisio n. The indicator
light
I i n 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 tha n you are o r if it
b rakes sha rply . When this wa rning is given,
i t may only be possib le to av oid a collision
by swerving or br aking sh arply . Th e ind ic a tor
li gh t
I and indicator in the disp lay will warn
yo u about the danger
c::> fig . 103 . You will al­
so hear an acoustic sig na l.
If yo u do not re act fast enoug h or do not re act
at all to the situat io n, braking g uard will inte r-
11
Thi s is not ava ilable in som e coun tri es.
vene by braking and the message braking
guard intervention will appea r.
- If a coll is ion is im minen t, the sy st em w ill
first provi de an acute warning by brie fly and
shar ply a pplying the brakes.
- If you do not re act t o the acu te war ning,
bra king g uard can brake w ith increas ing
force w ith in the lim its of the system. T his
red uces the vehicle speed in the event of a
co llision.
- The system can initiate maximum brak ing
short ly before a co llision
ll. Full dece leration
at high speeds occurs only in vehicles with
adapt ive cr uise control and side assist (pre
sense plus).
- If the brak ing g uard senses that yo u are not
braki ng hard enough w hen a co llision is im­
m inent, it can inc rease t he b ra ki ng fo rce .
- The pre sense functions also engage whe n a
col lision is imm inent
c::> page 196 .
Which function s can be controlled?
You can switc h braking guard an d the dis ­
tance/approach warning on or off in the M MI
c::> page 100, Settings in the MMI.
&_ WARNING
Lack of attent ion can cause collisions, ot h­
e r accidents and serio us pe rsonal inj uries .
Th e braking gua rd is an assist system and
ca nnot pr ev en t a collisi on by its elf . T he
dr iver must always in tervene. The drive r is
al way s res pons ible f or br aki ng a t the cor­
rect t ime.
- Always pay clos e att ention to traffic ,
e v e n w hen the bra king g uard is swi tched
on. Be ready t o intervene and be ready to
take comp lete contro l whenever necessa­
ry. Always keep the sa fe and legal dis ­
tanc e between your ve hicle an d veh icles
up ahead.
- Braking guard works wi thin limits and
wi ll not respo nd outside t he system lim­
its, for e xamp le w hen approaching a
stopped vehicle o r stationary obstacle ..,.