2018 AUDI S4 mirror

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Trailer towing Driving with a trailer
General information
Your Audi was designed primarily for passenger
transportation .
If you plan to tow a trailer, please remember that
the additional load will affect durability, econo­ my and performance.
Trailer towing not only places more stress on the
vehicle, it also calls for more concentration from
the driver.
For this reason, always follow the operating and
driving instructions provided and use common
sense.
Technical requirements
Trailer hitch
Use a weight-carrying hitch conforming to the
gross trailer weight. The hitch must be suitable
for your vehicle and trailer and must be mounted
securely on the vehicle's chassis at a technically
sound
location . Use only a trailer hitch with a re­
movable ball mount . Always check with the trail­
er hitch manufacturer to make sure that you are
using the correct hitch.
Do not use a bumper hitch.
The hitch must be installed in such a way that it
does not interfere with the impact -absorbing
bumper system. No modifications should be
made to the vehicle exhaust and brake systems .
From time to time, check that all hitch mounting
bo lts remain securely fastened.
When you are not towing a trailer,
remove the
tra iler hitch ball mount . This prevents the hitch
from causing damage shou ld your vehicle be
struck from beh ind ¢
,&. .
Trailer brakes
If your trailer is equipped with a braking system,
check to be sure that it conforms to all regula­
tions .
Trailer towing
The trailer hydraulic brake system must not be
directly connected to the vehicle's hydraulic
brake
system ¢.&. .
Safety chains
Always use safety chains between your vehicle
and the trailer.
Trailer lights
T ra iler lights must meet all regulations . Be sure
to check w ith your author ized Audi dealer for cor­
rect wiring, switches and relays.
Mirrors
If you are unable to see the traffic behind you us­
ing the regular outside mirrors, then you
must in­
stall extended mirrors. It is important that you
always have clear vision to the rear.
,8. WARNING
After removing the traile r hitch, do not store
it in your vehicle. In case of sudden braking,
the hitch could fly forward and injure you or
your passengers.
Operating instructions
Maximum trailer weight
A trailer for your vehicle is limited to a typical
class 1 or class 2 trailer.
Trailer load distribution
Be sure the load in the trailer is held securely in
place to prevent it from shifting forward, back­
ward or sideways.
Never allow a passenger to ride in a trailer ¢.&.
in Driver messages on page 100 .
Engine cooling system
Towing a trailer makes the engine work harder. It
is important that the cooling system's perform ­
ance is up to the additional load. Make sure that
the cooling system has enough fluid.
Tire pressure
When towing a trailer, inflate the tires of your
vehicle to the tire pressure listed under "Full
load" on the label ¢ page 344. Inflate trailer
99

Assistance systems
There is a temporary malfunction that may pre­
vent the active lane assist from switching on. Try
sw itch ing the active lane assist on again later.
rl! Audi active lane assist: Please take over
steering!
This message appears if you are not steering by
yourse lf. Ac tive lane assist is activated, but is not
ready to give wa rning
& WARNING
Note that messages may be delayed or not
displayed on vehicles with accessories mount­
ed on the steering whee l, s uch as a steering
wheel spinner knob. Always keep your hands
on the steer ing wheel.
Adjusting the steering time and vibration
warning
Applies to: veh icles with Audi active lane assist
You con adjust individual active lone assist set­
tings in the Infotainment system .
-
.,. Select in the Infotainment system: IMENUI but­
ton
> Vehicle > left contro l button > Driver as­
sistance > Audi active lane assist .
Steering time
Early :
in this setting, the corrective steer ing hap­
pens continuously to help keep the vehicle in the
center of the lane.
late : in this setting, the system provides correc­
tive steering just before a wheel goes over a de­
tected lane marker line.
Vibration warning
You can switch the additional vibration warning
in the steering wheel on or off.
WARNING
With the vibration warning switched off,
there will also be no visual warning in the in­
strument cluster display when crossing a lane
marker line.
128
@ Tips
In certain ma rkets: your settings are stored
automat ically and assigned to the remote
control key in use.
Audi side assist
Description
Applies to: vehicles with Audi side assist
Fig. 127 Sensor detection range
Fig . 128 D isplay on the exterior mirror
Side assist (lane change ass ist) helps you mon itor
your blind spot and traffic behind yo ur vehicle.
Within the limits of the system, i t warns you
about veh icles that are coming closer or that are
traveling with you within sensor range
(D
¢ fig. 12 7. If a lane change is classified as criti­
ca l, the display @in the exterior mirror turns on
¢fig. 128.
The display in the left exterior mirror provides as­
sistance when making a lane change to the left,
while the display in the right exterior mirror pro­
vides assistance when making a lane change to
the right.
Information stage
As long as you do not activate the turn signal,
side assist
informs yo u about vehicles that are

detected and classified as crit ical. The display in
the mirror turns on, but is dim .
The display remains dim in the information stage
so that your view toward the front is not distur­
bed.
Warning stage If the d isplay in a mirror blinks brightly when you
activate a turn signal, side assist is
warning you
about detected vehicles that it has classified as
critical. If this happens, check traffic by gla nc ing
in the exterior m irrors and over your shoulder
c::> .&. in General information on page 130 .
Applies to: vehicles with active lane assist : the
d isplay i n the mirror can also blink if you have not
act ivated a turn signal: if you are app roaching a
detected lane marker line and it appears you will
be leaving the lane, side assist will warn you
about detected vehicles that it ha s classified as
critical.
(D Tips
You can ad just the brightness on of the dis ­
play on the rearview mirror
c::;, page 130 .
General information
Applies to: vehicles with Audi side assist
®
®
©
Fig. 129 Drivi ng situat ion s
Assistance systems
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• •
Fig. 130 Rear of the veh icle: pos it ion of th e se nso rs
S id e assist functions at speeds above approxi­
mately 9 mph (15 km/h).
@ Vehicles that are approaching
In certain cases, a vehicle will be classified as
critical for a lane change even if it is still some ­
what far away . The faster a vehicle approaches,
the sooner the display in the exterior m irror will
turn on.
@ Vehicles traveling with you
Vehicles traveling with you are indicated in the
exter ior mirror if they are classified as cr itical for
a lane change . A ll vehicles detected by side assist
are ind icated by the time they enter your "blind
spot" , at the latest .
© Vehicles you are passing
If you s lowly pass a veh icle that s ide assist has
detected (the difference in speed between the
vehicle and your vehicle is less than approximate­
ly 9 mph ( 15 km/h)) , the disp lay in the exter ior
mirror turns on as soon as the vehicle en ters your
blind spot.
The display w ill not turn on if you quickly pass a
vehicle that side assist has detected (the differ­
ence in speed is greater than approximately 9
mph (15 km/h)) .
Functional limitations
T he radar sensors are designed to detect the left
and right adjacent lanes when the road lanes are
the normal width. In some situations, the display
in the exterior mirror may turn on even though
there is no vehicle located in the area that is criti-
cal for a lane change. For example :
..,.
129

Ass is tan ce sys tems
-If the lanes are narrow or if your are driving on
the edge of your lane. If this is the case, the system may have detected a vehicle in another
lane that is
not adjacent to your current lane.
-If you are driving through a curve . Side assist
may react to a vehicle that is in the same lane
or one lane over from the adjacent lane.
-If side assist reacts to other objects (such as
roadside structures like guard rails).
- In poor weather condit ions . The side assist
funct ions are limited.
Do not cover the radar
sensors ¢ fig. 130 with
stickers, deposits, bicycle wheels or other ob­
jects, because this will impair the function. Do
not use side assist when towing a trailer. For in­
formation on cleaning,
see¢ page 354 .
A WARNING
-Always pay attention to traffic and to the
area around your vehicle. Side assist cannot
replace a dr iver's attention . The driver alone
is a lways responsible for lane changes and
similar d riving maneuvers.
-In some situat ions, the system may not
function or its funct ion may be limited. For
example :
-If vehicles are approach ing or being left
behind very quickly. The display may not
turn on in t ime .
-In poor weather conditions such as heavy
rain, snow or heavy mist.
-On very wide lanes, in tight curves, or if
there is a rise in the road surface. Vehicles in the adjacent lane may not be detected because they are outs ide of the sensor
range .
(D Note
The sensors can be displaced by impacts or
damage to the bumper, whee l housing and
underbody. Th is can impa ir the system. Have
an authorized A udi dealer or authorized Audi
Serv ice Facility check their function .
(i) Tips
-If the window glass in the driver's door or
front passenger's door has been tinted, the
130
-
display in the exterior mirror may be incor­
rect.
-For an exp lanation on conform ity with the
FCC reg ulations in the United States and the
Industry Canada regulations, see
¢ page 386.
Switching on/off
App lies to: vehicles with A udi side ass ist
The system con be switched on/off in the Info­
tainment system .
If the system is activated, the displays in the ex­
terior mirrors wi ll turn on briefly when the igni­
tion is switched on .
.,. Select in the Infotainment system: IMENU! but­
ton
> V ehicl e > left control button > D riv er as·
s is tance
> Audi side a ssist. Off switches the
system off.
(D Tips
When yo u switch side assist on or off, the ex it
warning system activates or deact ivates
¢ page 131.
Setting the display brightness
App lies to: vehicles wit h Aud i side ass ist
The display brightness con be adjusted in the In ­
fotainment system.
.,. Select in the Infotainment system: IMENU ! but­
ton
> Veh icle > left control button > Dri ver as­
s ist ance
> Audi side a ssist.
The disp lay br igh tness adjusts au tomatically to
the brightness of the surroundings, both in the
information and in the warning stage. In very
dark or very bright surround ings, the automatic
adjustment will set the display to the minim um
or max imum level. In such cases, you may notice
no change when adjusting the br ightness, or the
c h ange may only be noticeable once the sur ­
r oundings change .
Adjust the br ightness to a leve l where the display
i n the information stage will not disrupt your
view ahead . If you change the br ightness, the dis-
play in the exterior mirror w ill briefly show the
.,.

Parking systems
Parking systems
General information
A ppl ies to: ve hicles w ith a rea r parking sys te m /pa rking sys ­
tem p lus/rearv iew camera/peripheral ca meras
Depending on your vehicle's equipment , various
parking aids will help you when parking and ma­
neuvering.
The
rear parking system is an audible parking aid
that warns you of obstacles
behind the vehicle
¢ page 137.
The
parking system plus assists you when park ­
ing by audibly and visually indicating objects de­
tected
in front of and behind the veh icle
¢ page 137.
The
rearview camera shows the area behind the
vehicle in the Infotainment system display . The
lines in the rearview camera image help you to
park or
maneuver ¢ page 138. The parking sys­
tem plus functions are also available
¢ page 137.
The
peripheral cameras give various views to
help you when parking or maneuvering
¢ page 140. The parking system plus functions
are also available
¢page 137.
A WARNING ,..__ -
- Always look for traffic and check the area
around your vehicle by looking at it directly
as well. The parking system cannot replace
the driver's attention. The driver is always
responsible when entering or leaving a park­
ing space and during similar maneuvers.
- Please note that some surfaces , such as
clothing, are not detected by the system .
- Sensors and cameras have blind spots in
which people and objects cannot be detect­
ed . Be especially cautious of small children
and animals .
- Always keep your eyes on the vehicle's sur ­
roundings, using the rearview mirror as
well.
- The sensors can be displaced by impacts or
damage to the radiator grille, bumper,
wheel housing and the underbody. The park­ ing system may be impa ired as a result.
136
Have an authorized Audi dealer or author­
ized Audi Service Facility check their func­
tion.
(D Note
- Some objects are not detected or displayed
by the system under certain circumstances:
- objects such as barrier chains, trailer draw
bars, vertical poles or fences
- objects above the sensors such as wall ex ­
tensions
- objects with certain surfaces or structures
such as chain link fences or powder snow
- If you continue driving closer to a low ob­
ject, it may disappear from the sensor
range. Note that you will no longer be
warned about this obstacle.
- Keep enough distance from the curb to re ­
duce the risk of damage to the rims.
{i) Tips
- The system may provide a warning even
though there are no obstacles in the cover ­
age area in some situations, such as:
- certain road surfaces or when there is tall
grass
- external ultrasonic sources such as from
cleaning vehicles
-in heavy rain, snow, or thick vehicle ex­
haust
- We recommend that you practice parking in
a traffic-free location or parking lot to be­
come familiar with the system . When doing
this, there should be good light and weath­
er conditions.
- You can change the volume of the signals
and the display ¢
page 143.
- Please refer to the instructions for towing a
trailer located in
¢page 144.
- What appears in the infotainment display is
somewhat time-delayed.
- Th e sensors must be kept clean and free of
snow and ice for the parking aid to operate .
- Th e rearv iew camera is automatically
cleaned when cleaning the rear window*
¢ page 60 .

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General information
Appl ies to: ve hicles with rearview ca mera
Fig . 140 Area covered (D and area not covered @by the
rea rv iew camera.
@ AUDI
•
Fig. 141 Luggage compartment lid: locatio n of the rear­
view camera
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The rearview camera is located above the rear li­
cense plate bracket. Make sure that the lens for
the rearview camera
~ fig. 141 is not covered by
deposits or any other obstructions because this
can impair the function of the rearview camera.
For information on cleaning, see<=>
page 354.
The rearview camera coverage area includes (D
~ fig. 140 . Only this area is shown in the Info­
tainment display. Objects that are in area @,
which is not covered, are not displayed.
A WARNING
-Always read and follow the applicable warn­
ings
<=> A in General information on
page 136.
- If the position and the installation angle of
the rearview camera was changed, for ex­
ample after a collision, do not continue to
use the system for safety reasons. Have it
checked by an authorized Audi dealer or au­
thorized Audi Service Facility .
Parking systems
-Only use the rearview camera to assist you if
it shows a good, clear picture. For example,
the image may be affected by the sun shin­
ing into the lens, dirt on the lens, or if there
is a malfunction.
- Use the rearview camera only if the luggage
compartment lid is completely closed. Make
sure any objects you may have mounted on
the luggage compartment lid do not block
the rearview camera.
- The camera lens enlarges and distorts the
field of vision. The object appears both al­
tered and inaccurate on the screen.
- In certain situations, people or objects in
the display appear closer or farther away:
- For objects that do not touch the ground,
such as the bumper of a parked vehicle, a
trailer hitch or the rear of a truck. Do not
use the orientation lines in this case .
- If driven from a level surface onto an in­
cline, or a downward slope .
- If driven toward protruding objects.
- If the vehicle is carrying too much load in
the rear.
(D Note
-Always read and follow the applicable warn­
ings
r::!> (D in General information on
page 136.
- The orange-colored orientation lines in the
Infotainment display show the vehicle path
based on the steering wheel angle. The
front of the vehicle swings out more than
the rear of the vehicle. Maintain plenty of distance so that an exterior mirror or a cor­
ner of the vehicle does not collide with any
obstacles.
Switching on/off
App lies to : vehicles wi th rearv iew camera
Switching on
.. Shift into reverse, or
.. Press the P, qA button in the center console
r::!> page 138, fig. 13 7. A short confirmation
tone sounds and the LED in the button turns
on.
139

General information
Appl ies to: ve hicles with per ip heral cameras
Fig. 145 Loca tion of peripheral c amera s
The four periphe ral cameras are located in the ra­
diator grille, in the luggage compartment lid and
on both exterior mirrors ¢
fig. 145 . Make sure
that the lenses are not covered by deposits or any
other obstructions as this may impair the system.
For information on cleaning, see¢
page 354.
Black corners are shown in the vehicle silhouette
in
Area mode . Objects in these areas are outside
of the camera's field of view and are not detect­
ed.
& WARNING
- Always read and follow the applicable warn­
ings ¢
.&. in General information on
page 136.
- If the position or the installation angle of a
camera was changed, for example after a
collision, do not continue to use the system
for safety reasons. Have it checked by an au­
thorized Audi dealer or authorized Audi Service Facility.
- Keep in mind that the image in the display is
incorrect if the exterior mirror housing has
been moved out of place .
- Use the
Rear mode and the corner view
(rear)
mode only when the luggage com­
partment lid is completely closed. Other­
wise the image in the display will be incor­
rect.
- The vehicle surroundings are shown using
the camera images . The vehicle image is
shown by the system. Objects and obstacles
above the camera are not displayed.
Parking systems
-Camera lenses enlarge and distort the field
of vision. The objects appear both altered
and inaccurate on the screen.
(D Note
- Always read and follow the applicable warn­
ings
¢ (Din General information on
page 136.
- The Infotainment display shows the direc­
tion in which the rear of the vehicle is travel­
ing based on the steering wheel angle. The
front of the vehicle swings out more than
the rear of the vehicle . Maintain plenty of
distance so that an exterior mirror or a cor­
ner of the vehicle does not collide with any
obstacles.
(D Tips
If the 8/fl;!J/c::5 symbol appears in the dis­
play and the respective display area is grayed
out, then the power exterior mirrors were
folded in or the driver's door/front passeng­
er's door/luggage compartment lid was
opened.
Switching on/off
Applies to: vehicles wi th peripheral ca meras
Fig. 146 Center co nsole: button P. a
Fig. 147 In fo tai nment syste m: select the mode
141

Driving sa fe ty
Driving safety
Basics
Safe driving habits
Please remember -safe ty first!
The individua l safety features of your vehicle can
work together as a system to help protect you
and your passengers in a wide range of accidents.
These features cannot work as a system if they
are not always correctly adjusted and correctly
used .
This chapter contains important informat ion,
tips, instruct ions and warn ings that you need to
read and observe for your own safety, the safety
of your passengers and others . We have summar­
ized here what you need to know about safety
be lts , a ir bags, child restra ints as well as child
safety. Yo ur sa fe ty is for us
priority number 1 . Al ­
ways observe the information and wa rnings in
this section - for your own safety as well as that
of your passengers.
The informa tion in this section applies to all
model ve rsions of your vehicle . Some of the fea­
tures described in th is sections may be standard
equipment on some models, or may be optional
equ ipment on others. If you are not sure, ask
your author ized Audi dealer.
A WARNING
- Always make sure that you follow the in­
structions and heed the WARNINGS in th is
manual. It is in your inte rest and i n the in­
te res t of your passengers .
- Always keep all of the Owner 's L iterature
man uals in yo ur Audi when you lend o r sell
yo ur vehicle so that this importan t info rma­
t ion w ill always be availab le to the dr iver
and passenge rs.
- Alw ays keep t he Owner 's L ite ra tu re han dy
so that you can find i t easi ly if yo u have
questions .
254
· Important things to do before driving
Safety is everybody 's job! Vehicle and occupant
safety always depends on the informed and care­
ful driver .
For your safety and the safety of your passen­
gers,
before driving always:
.. Make sure that a ll lights and signals are operat­
ing correctly .
.. Make sure tha t the tire pressure is correct .
.. Make sure that all windows are clean and afford
good vis ibility to the outs ide .
.,. Sec ure all luggage and othe r items ca refully
¢ page 259 .
.,. Mak e sure tha t noth ing ca n interfere with the
pedals .
.. Adjust front seat, head restraint and mirrors
correctly for your height.
.. Applies to: adjustable head restraints: Instruct
passengers to adjust the head restraints ac­
cording to the ir height .
.. Make sure to use the rig ht child restraint cor­
rectly to protect
chi ldren ~ page 295 , Child
safety.
.,. Si t properly in yo ur seat a nd make su re t hat
your passengers do the same ¢
page 65, Front
seats.
.. Fasten your safety belt and wear it properly . Al­
so instruct your passenge rs to fasten thei r sa fe­
ty belts properly ¢
page 263.
What impairs driving safety?
Safe driving is directly related to the condition of
the vehicle , the driver as well as the driver's abili ­
ty to concentra te on the road withou t being dis­
tracted.
The driver is responsib le for the sa fety of the ve­
hicle and a ll of its occupants . If your ability to
drive is impa ired, safety risks for everybody in the
vehicle increase and you a lso become a hazard to
everyone else on the road ¢
,&.. There fore:
.. Do not let yourse lf be distracted by passengers
or by using a cellular telephone .
.. NEVER dr ive whe n your driving ab ility is im -
paired (by med ications, alcohol, drugs, e tc.) .
..,.