2018 AUDI S4 brake light

Assistance systems
Changing the speed
Applies to: vehicles w ith Audi adaptive cruise co ntro l
0
f
' 0
Fig. 113 Operat ing lever : c h ang ing the speed
.,. To increase/decrease the speed in 1 mph (1
km/h) increments, br iefly
tap the lever toward
010 c:> fig . 113 to the first level.
.,. To inc rease/decrease the speed in 5 mph
(5 km/h or 10 km/h) increments, br iefly
tap
the leve r toward 0 10 to the second level.
.,. To increase or decrease the speed quickly, hold
the lever towards 0 10 u p to the fi rst or sec­
ond level until the red
LED @ reaches the de­
s ir ed speed
c:> poge 110, fig. 112 .
You can a lso preselect the speed when adaptive
cruise control is not active by moving the lever in
the desired d irection
0 10 . Activate the previ­
ously selected speed by pulling the lever into po­
sition
(D c:>poge 110, fig. 111 .
After each change, the new stored speed appears
briefly in the status line
c:;, poge 110, fig. 112 @.
When adaptive cruise control is active, the ill in­
dicator light turns on and when adaptive cruise
control is not active, the
ll'J indicator light turns
on . In the Audi virtual cockpit*, the
II indicator
light turns on instead.
l) Thi s is not ava ilab le in som e coun tri es .
112
Dr iving in stop-and-go traffic
App lies to : vehicles wit h Audi adapt ive cruise control and au­
tomatic transmiss ion
Fig. 114 Instrument cl uster: safe start monitor
The adaptive cru ise control system also assists
you in stop-and-go traffic . If a vehicle driving
ahead stops, your vehicle will brake and stay at a
stop w ithin the limits of the system.
.,. To resume driving with adaptive cruise control,
tap the accelerator pedal or
.,. Pull the lever toward you into position@
c:>page 113, fig. 115.
Starting to drive with adaptive cruise
control
1 )
As long as the message ACC: automatic go dis­
plays and the vehicle dr iv ing ahead s tarts to
move, your vehicle will start driving
c:> ,&. Yo u can
activate
ACC: automatic go again for a short
time by pulling the lever to position@.
Fo r safety reasons, your vehicle w ill only start to
drive automatically if:
- the drive r's safety belt is fastened
-all doors and the hood are closed
- your vehicle is not stationary for more than
three minutes
Safe start monitor
If an obstacle is detected when you start driving,
you w ill be alerted to the danger by
the . indi­
cator light and the image in the instrument clus­
ter display
c:> fig. 114 c::> .&. . An audio signal will
also sound . Your vehicle will drive more slowly
when starting. This may also happen in some sit -
uations when the re is no apparent obstacle.
.,..

Predictive control
(efficiency assist)
Description
A pp lies to: ve hicles with Audi adaptive cruise co ntro l an d pr e·
di ctive efficiency assist
Fig. 118 Instrument cluster: pred ictive control
General information
The predictive control 1l uses the map informa­
tion from the navigation system in order to react
proact ively when driv ing. Information from the
camera-based traffic sign recognition* is also ap­ plied to recognize traffic signs
<:!)page 104.
When coming up to areas with speed limits or
changes in the course of the road (such as curves,
intersections or traffic circles), the system brakes
automatically and then accelerates back up to
the set speed .
When adaptive cruise control is switched off, the
system only provides notifications without con­
trolled
interventions ¢ page 107.
The driver can override the predictive control at
any time by pressing the accelerator or brake
pedal. If the system changes the vehicle speed to
adapt to speed limits, you can change the speed
using the
lever ¢ page 112, fig. 113 .
Always switch off the predictive control in
the following situations:
- When increased attention is needed from the
driver .
- In poor weather conditions such as snow or
heavy rain.
0 -When driving on roads in poor condition . al ~ N
" N ~ 0 0
~ ll This is not ava ila ble in some co untrie s. al
Assistance systems
Indicator in the instrument cluster display
When switching on the adaptive cruise contro l
for the first time, the message
ACC: 11D + B ac­
tive
in the instrument cluster indicates the avail·
ability of the predictive control.
T he symbol appears when the system
is regulating the speed to match a speed limit . If
this is the case, the system is reg ulating a speed
of 50 mph (80 km/h). The speed is then taken
over by the adaptive cruise control. The speed in
the speedometer LED ring adjusts to the speed to
be maintained
¢ page 110, fig . 112. The ..
¢ fig . 118 symbo l appears when there is an adap ­
tation to the route ahead .
If you are in the Driver assistance display in the
instrument cluster, then the following symbols
will indicate which occurrence the system is cur­
rently responding to:
Symbol Meaning
MPH USA
models:
Speed limit
km/h
Canada models:
speed limiter
Ir
Curve
_l!L
1i1
Intersection
~ ): Traffic c ircle
A WARNING
- Read the warnings on ¢.&. in General infor­
mation on page 109
and on¢ .&. in Descrip­
tion on page 104 .
- Pay attention to traffic and the area around
your veh icle when predictive control is
switched on. The driver is always responsi­
ble for assessing the traffic situation.
- There is an increase in the risk of an acci­
dent, because the system does not consider
"right of way" rules and also does not re-
spond
to traffic lights. ._.
115

a co .... N ,....
N .... 0 0
3 co
In a speed range under 40 mph (65 km/h), traffic
jam assist can help to keep the vehicle within a lane calculated by the system. W ith in the lim its
of the system, the system controls the steering
automatically when adapt ive cruise control is
switched on . Since traffic jam assist is only an as­
sist system, the driver must always keep his or
her hands on the steer ing whee l and be ready to
steer. The d rive r ca n override the control at any
time by actively steering.
The system is designed for driv ing on express­
ways and highways.
Switching traffic jam ass ist on and off
... Press the button to switch the system on and
off<=> fig. 119.
... To turn the system off completely, select in the
Infotainment system:
I MENU ! button> Vehicle
> left contro l button > Driver a ssistance > Traf­
fic jam a ssist .
If traff ic jam assist was deactivated through the
Infotainment system, you can cont inue operating
the act ive lane assist using
the<=> fig. 119 button
<=> page 126. The traffic jam ass ist functions are
no longer available.
Requirements for using traffic jam assist:
-Traffic jam assist must be switched on in the
Infota inment system .
-Adaptive cruise control must be switched on
and act ive
c;, page 110 .
Always switch off traffic jam assist in the
following situations:
-When increased attention is needed from the
driver .
-In poor weather conditions such as snow or
heavy rain .
-When driving on roads in poor condition .
-In construction zones.
-In city driving .
Traffic jam assist availability:
When you are in the Driver assistance view in the
in str ument cluster disp lay, the indicator light
turns
on ¥ and the message Traffic jam assist
available
appears if a traffic jam situation was
detected. You can open the
Driver assistance dis -
Assistance systems
play using the mu ltifunction steering wheel but­
tons
c;, page 13 . To activate traffic jam assist, you
must press the
<=> fig. 119 button and switch on
the adaptive cruise control
c;, page 110.
Indicator lights
Ill and II-traff ic jam assist is switched on.
Vehicles driving ahead were detected. Your vehi ­
cle adapts whi le driving
c;, fig. 120.
•-Traffic jam ass ist switches off if the driver
does not take over steer ing after multiple driver
intervention requests . The system brakes the ve ­
hicle until it is stationary.
A WARNING
-A lways keep your hands on the steering wheel
so you can be ready to steer at any t ime . The
driver is always responsible for staying in a lane and for assessing traffic s ituations . Read
and follow the warnings
on<=>.& in General
information on page
109 . Never use traffic
jam ass ist in the following situations or you
will increase the risk of an accid ent.
-Driving offroad or on unpaved roads. Traffic
jam assist is only designed for use on paved
roads.
-I n city driv ing o r in construction zones.
-On curv ing stretches of road.
-In narrow lanes.
- In unclear traffic situat ions such as at inter-
sections or toll stat ions.
@ Tips
You are not necessarily guided to the center
of your lane.
117

Assistance systems
This message appears if you would like to switch
the system on and there is a stationary object di­
rectly in front of your veh icle.
Door open
The system is not ava ilable when the door is
open.
Audi pre sense
Introduction
A pp lies to: ve hicles w ith Audi p re se nse
W ithin the limits of the system, the pre sense
functions can initiate measures in particularly
dangerous situations to protect the veh icle pas­
sengers and other road users .
- Due to the interlinking of various vehicle sys­
tems, crit ical dr iving s ituations can be detected
by
pre sense basic and measures for preventa ­
tive occupant protection are can be initiated .
- The
pre sense front system uses the data from
the adapt ive cruise control* radar sensors and
the camera to calculate the probab ility of a col­
li sion. Withi n the limits of the system, an im­
pending collision with vehicles can be dete cted
in both urban and rural speed ranges. In this
case, the system warns the driver visually,
acoustically and with a jerk on the brakes if nec­
essary. If needed, it can initiate a partial or full
deceleration to reduce the co llision speed or to
avo id the collision under certain c ircumstances .
In conjunct ion with pre sense basic/rear, the
front safety belts are also revers ibly tensioned
when needed . The pre sense front is also active
whe n adapt ive cruise control* is swit ched off.
- Pre sense rear contains pre sense basic func­
tions. It uses the data from the side assist* ra­
dar sensors and calculates within the limits of
the system the probab ility of a rear end coll i­
s ion with the vehicle behind you. Pre sense rear
is also active when side assist* is switched off.
- Within the limits of the system,
pre sense city
uses the camera data and can detect an im ­
pending collision with vehicles and pedestrians.
In this case, the system warns the driver visual ­
ly, acoustically and with a jerk on the brakes if
necessary. If needed, it can initiate a full decel­
eration to reduce the collision speed or to avoid
120
the collision under certa in circumstances . In
conjunction with pre sense basic/rear, the front
safety belts are also reversibly tensioned when
needed .
A WARNING
-
Read the general information inc> & in Gen-
eral information on page 109,
c> & in Gener­
al information on page 130.
(D Tips
- Certain pre sense funct ions sw itch off when
dr iving in reverse.
- The pre sense functions may not be availa­
ble if there is a malfunct ion in the ESC sys­
tem or the a irbag control module.
- Note that the reversible belt tensioner on
the front passenger's side deactivates when
the front passenger's airbag is deactivated .
- Switch the pre sense off when you are not
using public streets or when loading the ve­
hicle onto a vehicle carrier, tra in, sh ip or
other type of transportation. This can pre­
vent an undesired intervention from
the pre
sense system.
Audi pre sense basic
Description
App lies to : vehicles wi th Audi pre sense basic
The pre sense bas ic functions are activated at a
speed of approx imately 20 mph (30 km/h) or
higher .
The following functions can be triggered under certain condit ions w ith in the lim its of the sys­
tem:
- Tensioning of the safety belts (for examp le,
during heavy brak ing): the front safety belts
have reversib le be lt tens ioners. If a collision
does not occur, the safety belts loosen slightly
and are ready to trigger again.
- Closing the windows and sunroof* .
-

-Activating the emergency flashers l).
The message Audi pre sense . ¢ page 121,
fig. 122 will warn you abo ut the danger.
Aud i drive select*: the trigger t imes are adjusted
depending on the mode selected.
Audi pre sense front
Description
Applies to: veh icles with Audi adaptive cruise control
Within the limits of the system, pre sense front
can warn you of impending collisions and initiate
the corresponding braking maneuvers or the sup­ porting measures when avoiding a collision .
If detected in time, the system can rank the dan­
gerous situation as critical if a vehicle driving
ahead brakes suddenly, if your own vehicle is ap­
proaching a significantly slower vehicle at high
speed or when there is an oncoming vehicle dur­
in g a turning maneuver .
If detection is not possible, then pre sense front
does not react .
Warnings
Applies to: ve hicles with Audi adaptive cruise control
Fig. 122 In strument cluste r: approac h warning
General information
The system recognizes various dangerous situa­
tions . The
early warning occurs if:
-a vehicle driving ahead brakes suddenly,
-your own vehicle approaches a significantly
a s lower vehicle or stationary vehicle in the direc-co
;::; tion of travel. ,....
N .... 0 0
3 1) This is not availa ble in some co untrie s. co
Assistance systems
When this warning occurs, it may only be possi­
ble to avoid a collision by swerving or braking
strongly. The message
Audi pre sense.
¢ fig. 122 and a warning tone will warn you
about the danger .
If you do not react enough or not at all to a dan­
gerous situation that was detected by the sys­
tem, pre sense front provides assistance by ap­ plying the brakes .
If a collision is imminent, the system will first
provide an
acute warning by braking sharply. You
will also warned by an indicator in the instrument
cluster
display¢ fig. 122. If you do not react to
the acute warning, pre sense front can brake with i ncreasing fo rce within the limits of the
system
1>. This reduces the vehicle speed in the
event of a collision. At low vehicle speeds, pre
sense front can in itiate a complete deceleration
shortly before a collision with a vehicle driving
ahead
l). If pre sense front determines that you
are not braking strongly enough when a collision
is imminent, it can increase the braking force.
T he following functions trigger in conjunction
with pre sense basic/rear at corresponding vehi ­
cle speeds:
-Reversible tensioning of the front safety belts.
-Closing the windows and sunroof* .
-Inflating the side bolsters* on the seat back-
rest .
Audi drive select*: depending on the mode se­ lected, the reversible belt tensioner, the closing
of the w indows and sunroof*, and the inflating of
the side bolsters* on the seat backrest may not be active.
Evasive steering support
Evasive steering support helps you to steer the
vehicle around an obstacle in a critical situation .
If you avo id an obstacle after the acute warning,
then the evasive steer ing support ass ists you by
applying slight stee ring adjustment to correct
.,.
121

Assistance systems
-when there are visual obstr uctions, such as
glare, reflections or variations in light
- when it is dark
- if the camera window or the windshie ld is
dirty, iced over, damaged or covered
- when driving on snow, ice or loose ground
- in curves
- if the ESC was restricted or switched off
- when towing a tra iler
- when the driver's seat belt is unfastened
- up to ten seconds after switching on the ig-
nition
(D Note
Impacts or damage to the camera mount on
the windshield can disp lace the sensor . Pre
sense city can be impa ired by this. Have an au­
thorized Audi dealer or authorized Aud i Serv­
ice Facility check the ir funct ion.
{D) Tips
- You can cancel the system braking interven­
tion if you accelerate considerably or swerve
away.
- Keep in mind that pre sense city can brake
unexpectedly. Always secure any cargo or
objects that you are transport ing to reduce
the r isk of damage or injury.
- Specific pre sense city funct ions sw itch off
when the ESC is limited or switched
off
¢ page 147 or the hill descent assist* is
switched on
¢page 148.
-When there is a malfunction in the camera,
the pre sense city funct ions also switch off.
Settings in the
Infotainment system
A pp lies to: ve hicles w ith Audi p re se nse
.,. Select in the Infotainment system: IMENU I but­
ton
> Vehicle > left control button > Driver as­
sistance
> Audi pre sense.
Turn on/off Audi pre sense
-the pre sense func­
tions can be turned on and
off.
124
If the system is switched off, it switches on again
automatica lly once the ignition is switched on
again.
Early warning -the early warning can be switch­
ed
off or the pre sense city/front warning point
can be set
( Early /Medium /Late ).
Set the warning time for the early warning to
Early at first . If this causes undesi red early warn­
ings to appear, then set the warning time to
Me­
dium .
The Late warning time should only be set
i n spec ial circumstances, for example, when driv­
i ng with a very dynamic style.
(D Tips
Your settings are automatically stored and as ­
signed to the remote control key being used.
Messages
Applies to: vehicles wi th Audi pre sense
II Audi pre sense: malfunction! Please contact
Service
This message appears when the pre sense func­
tion is affected . For example, th is could be
ca used by a faulty sensor. Drive to an authorized
Audi dealer or authorized Audi Service Facility im­ mediately to have the malfunction corrected.
II Audi pre sense currently restricted . Restrict­
ed sensor vision due to surroundings. See own­
er 's manual
This message appears if the radar sensor and
camera view is obstructed, for example by leaves,
snow, heavy spray or dirt. If necessary, clean the
sensors and the area around the camera
¢ page 109, fig . 108 or ¢page 129, fig. 130 .
II Audi pre sense: currently restricted. Towing
mode
For vehicles wi th a trailer hitch installed at the
factory, the pre sense rear functions switch
off
when the electrical connector at the socket is
plugged in. There is no guarantee the functions
will switch
off when using a retrofitted trailer
hitch.
II Audi pre sense: currently restricted

Intelligent Technology
Intelligent Technology
Electronic stabilization
control (ESC)
Description
Elect ronic stabilization control (ESC) supports
driver safety.
It red uces the risk of slipping and
improves driving stability. ESC detects crit ica l sit­
uations such as when the vehicle is oversteering
and understeering or the wheels are spinning.
The vehicle is stabilized by applying the brakes or reducing eng ine torq ue. When the ESC engages,
the hJ ind icator light blinks in the instrument
cluste r.
The fo llow ing systems are integrated in the ESC:
Ant i-loc k bra king system (ABS)
ABS prevents the whee ls from locking when brak­
ing. The vehicle can sti ll be steered even during
hard brak ing. Apply steady pressure to the brake
pedal. Do not pump the pedal. A puls ing in the
brake pedal indicates that the system is acting to
stabilize the vehicle .
Brake assist system
The brake assist system can decrease brak ing dis­
tance . It increases braking power when the driver
presses the brake pedal quick ly in emergency sit­
uations . You must press and hold the b rake pedal
until the dangerous situat io n is over . In veh icles
with adapt ive cr uise control*, the bra ke assist
sys tem is more sensitive if the d ista nce detec ted
t o the vehicle dr iv ing ahead is too small.
Anti -Slip Regulation (ASR )
ASR reduces eng ine power when the drive wheels
begin sp inning a nd adapts the force to the road
conditions . This makes it easie r to start, acceler­
a te and dr ive up h ills.
Electron ic differenti al lock (EDL )
The EDL applies the brakes to a wheel that starts
spinning and transfers the drive power to the
other driving wheel or wheels ( if the veh icle is
eq uipped w ith all whee l dr ive*) . T his function is
not available at higher speeds.
146 In extreme cases,
ED L automat ically switches off
to keep the brake on the braked wheel from over­ heating. The veh icle is still working correct ly. ED L
will switch on again automatically when condi­
tions have returned to normal.
Steering r ecommendat ion
The ESC he lps to stabilize the vehicle by changing
the steering torque.
In veh icles with dynamic s teer ing*, ESC a lso
helps to stab ilize the steering in cr it ica l situa ­
tions.
Selective wheel torque control
Se lective whee l torque cont rol is used when d riv­
i ng on curves. The front whee l on the inside of
t h e curve or both whee ls on the i nside of the
curve are braked se lectively as needed. This al­
l ows more precise driving in curves.
Automatic post -collision b raking system
The "automat ic post-collis io n braking system"
can help to reduce the risk of sliding and of addi­
tiona l collisions after an acc ident. If the a irbag
contro l modu le detects a collision, the ve hicle is
braked by the ESC.
The veh icle does not bra ke automatically if:
-the dr iver presses the accelerator pedal, or
-the ESC, the brake system or the veh icle electri-
cal system are not functioning.
&_ WARNING
-The ESC and its integrated systems cannot overcome the lim its imposed by natura l
phys ica l laws. This is espec ially important
on sl ippery or wet roads. If the systems be­
gin acting to stabilize your vehicle, you
should immediately alter your speed to match the road and traffic conditions. Do
not let the increased safety provided tempt
you into taking risks. This could increase
your r isk of a coll is ion.
-Please note the r isk of a coll is ion increases
when dr iv ing fast, especially through curves
and on slippery or wet roads, and when dr iv­
ing too close to objects ahead . The ESC and
its integrated systems cannot always

Intelligent Technology
Applies to: allroad
Offroad mode on
ESC/ASR off Offroad mode off or
ESC /ASR on
Beha vior
T he ESC and ASR stabiliza -The stabi lization f unction is The f ull stabilization tune -
tion functions are limited not available
¢ .&. . ESC and tion of the ESC and ASR is
¢ & . ASR are sw itched off . available aga in .
Operation Press the l~ m l button b rief- Press an d ho ld the l~ "'' I but- Press the l~ "" I button again .
ly. ton longer than three sec-
onds.
Indicator II turns on. Iii and lf'tii•)H turn on. II turns off or II and
light s li'tii•)H turn off .
Message s Stabilization cont
rol (ESC ): Stabiliza tion control (ESC ): Stabilization cont rol (ESC ):
offroad . Warning! Redu ced off . Warning! Restricted
on
s tability stability
A WARNING
You should only switch sport/offroad mode
on or switch ESC/ASR off if you r drivi ng abili­
ties and road cond it ions permit .
- The stabilization function is lim ited w hen
sport mode/offroad mode is swi tched on.
T he driving w heels could sp in and the veh i­
cl e could swerve, especi ally o n slick or slip­
pery road sur faces.
- T here is no vehicle sta biliz at ion when ESC/
ASR a re swi tched off.
Hill descent assist
Applies to: allroad
Hill descent assist makes it possible to drive
down a hill at a constant speed.
F ig. 1 56 Center co nso le: hil l desce nt ass ist button
~ To switc h hill descent assist on, press the !"~I
button. The LED in the button t urns on.
~ Press the button again to switch it off. The LED
in the button turns off.
148
Hill descent assist brakes a ll four wheels auto­
matically in order to limit speed when d riving ei­
ther forward or reverse on hills with a grade from
approximately 6 to 60%. The wheels will not lock
u p because the ABS remains activated.
When hill descent assist is on, the speed your ve ­
hicle was traveling when it entered the hill is
maintained. It is only possib le to sw itch on the
ass ist when driving slower tha n 37 mph (60 km/
h) . The ass ist beg ins shortly af ter you start dr iv­
i ng and cont inues up to app roxima tely 19 mph
(30 km/h). The d rive r ca n in crease o r de crease
t h e ve hicle spee d wit hin these lim its by press ing
t h e accelerator or brake pedal.
However, there must be enough t ract ion . Hill de­
sce nt assist
cannot function as e xpec ted, if fo r
ex ample the h ill is icy o r if t he surface is loose
¢ &.
Active regulat io n of a speed up to approximate ly
19 mp h (30 km/h) is s ignaled in the instr ument
cl us ter by an ind ic a tor light
• . The in dica tor
li gh t tur ns on when i n the ready mode.
II.
The system does not work at speeds between ap­
prox imately 19 and 37 mph (30 and 60 km/ h).
The system is the n in ready-mode. This is indica t­
ed by the L ED in the b utton t urnin g on. The sys­
tem a utomatica lly switched o ff when you drive
faster than 37 mph (60 km/h). The LED w ill also
turn off in this scenar io.
Hill descen t assis t is au tomatically ac tiva ted un-
der the fo llowing cond itions:
.,.