AUDI S4 2020 Owners Manual
Manufacturer: AUDI, Model Year: 2020, Model line: S4, Model: AUDI S4 2020Pages: 296, PDF Size: 80.45 MB
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8W1012721BB 
Driver assistance 
  
— Steering correction - With the Early  setting, 
steering correction occurs continuously in order 
to help the driver keep the vehicle in the center 
of the lane. In the Late setting, the steering 
correction will only occur shortly before a wheel 
crosses a detected lane marker line. 
— Vibration warning - You can select if you would 
also like to be warned using a vibration in the 
steering wheel. 
@ Tips 
Certain settings are automatically stored and 
assigned to the remote control key being 
used. 
Applies to: vehicles with Audi active lane assist 
ri or is displayed when there is a malfunc- 
tion, the active lane assist functions may be un- 
available or limited. 
A message that indicates the cause and possible 
solution may appear with some displays. The 
weather conditions may be too poor or the cam- 
era may be covered. Clean the area in front of the 
camera > page 116 and try to turn on the sys- 
tems again later. 
If the malfunction remains, drive to an author- 
ized Audi dealer or authorized Audi Service Facili- 
ty immediately to have the malfunction correct- 
ed. 
Audi pre sense 
Introduction 
Applies to: vehicles with Audi pre sense 
Within the limits of the system, the Audi pre 
sense functions can initiate measures in certain 
driving situations to protect the vehicle occu- 
pants and other road users. Depending on the ve- 
hicle equipment, various Audi pre sense systems 
may be installed: 
— Audi pre sense basic can react during emergen- 
cy and dangerous braking maneuvers and un- 
stable driving situations (such as oversteering 
or understeering). 
— Audi pre sense front can detect an impending 
frontal collision with vehicles ahead and react 
with warnings, braking interventions, and pre- 
emptive safety measures for the vehicle occu- 
pants. 
— Audi pre sense city can detect an impending 
collision with vehicles and pedestrians and re- 
act with warnings, braking interventions, and 
preemptive safety measures for the vehicle oc- 
cupants. 
— Audi pre sense rear monitors the rear traffic 
behind your vehicle and can react to an impend- 
ing rear impact. 
— The swerve assist can help you to steer the ve- 
hicle around an obstacle during an evasive ma- 
neuver that is detected as critical. 
— The turn assist can detect vehicles in the oppo- 
site lane and react with braking maneuvers. 
Peele ea ey 
Applies to: vehicles with  Audi pre sense 
Depending on the vehicle speed and the vehicle 
equipment, the following functions may be initi- 
ated in certain situations: 
— Visual and audio warnings 
— Reversible tensioning of safety belts 
— Closing the windows and panoramic glass roof 
— Adjusting the seats 
  
Z\ WARNING 
Follow the safety precautions and note the 
limits of the assist systems, sensors, and 
cameras > page 114. 
G) Tips 
— Depending on the dangerous situation that 
is detected and the selected Audi drive se- 
lect* mode, all preemptive safety measures 
may not be initiated under certain circum- 
stances. Certain functions can be adjusted 
or skipped if necessary. 
— Audi pre sense may be restricted or unavail- 
able under certain circumstances, for exam- 
ple if: 
      
— There are passengers with unfastened 
safety belts 
139  
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Driver assistance 
  
— It has only been several seconds since the 
ignition was switched on Th indicator 
light turns on. 
— When driving in reverse 
— The front passenger's airbag is switched 
off 
— There is an airbag control module mal- 
function 
  
— System functions may not be available if 
the ESC is limited or switched off, or if 
there is a malfunction. 
PN eye 
Applies to: vehicles with Audi pre sense basic 
Audi pre sense basic is automatically active at 
speeds of approximately 20 mph (30 km/h) and 
higher. The system can trigger the Audi pre sense 
preemptive safety measures during emergency 
braking and dangerous braking maneuvers as 
well as in unstable driving situations, such as 
oversteering or understeering. 
  
ZA WARNING 
Follow the safety precautions and note the 
limits of the assist systems, sensors, and 
cameras > page 114. 
Audi pre sense front 
Applies to: vehicles with Audi pre sense front 
      
The Audi pre sense front system uses the data 
from the radar sensors and calculates the proba- 
bility of a rear-end collision. Within the limits of 
the system, an impending collision with the front 
of the vehicle can be detected in both urban and 
rural speed ranges. 
Early warning/acute warning 
The system can recognize various dangerous sit- 
uations. The early warning occurs if: 
— Avehicle driving ahead brakes suddenly 
— Your own vehicle approaches a significantly 
slower vehicle or stationary vehicle in the direc- 
tion of travel 
The message Audi pre sense [@) or Audi pre 
sense wa and a warning tone will warn you about 
the danger. 
140 
If there is an impending collision with vehicles, 
there may also be  an acute warning in the form 
of sharp braking. You will also be warned by  an 
indicator in the instrument cluster display. When 
this warning occurs, it may only be possible to 
avoid a collision by swerving or braking strongly. 
Automatic deceleration 
If you do not react to the acute warning, Audi pre 
sense can brake the vehicle to a full stop within 
the limits of the system if the vehicle is traveling 
at low speeds. This reduces the vehicle speed in 
the event of a collision. 
Automatic braking force increase 
If Audi pre sense determines that you are not 
braking strongly enough when a collision is immi- 
nent, it can increase the braking force based on 
the situation. 
  
Z\ WARNING 
— Follow the safety precautions and note the 
limits of the assist systems, sensors, and 
cameras > page 114. 
— Audi pre sense front cannot overcome natu- 
ral physical laws. It is a system designed to 
assist and it cannot prevent a collision in ev- 
ery circumstance. The driver must always in- 
tervene. The driver is always responsible for 
braking at the correct time. Do not let the 
increased safety provided tempt you into 
taking risks. This could increase your risk of 
a collision. 
— Audi pre sense front does not react to cer- 
tain objects, such as people/cyclists, ani- 
mals, crossing or oncoming vehicles, bars, 
railings, or railcars. 
— Audi pre sense front may be limited or un- 
available when driving in curves. 
— Loose objects can be thrown around the ve- 
hicle interior during sudden driving or brak- 
ing maneuvers, which increases the risk of 
an accident. Store objects securely while 
driving. 
       
G) Tips 
Certain pre sense front functions will switch 
off when the ESC is restricted or switched off >  
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Driver assistance 
  
= page 110, when there is a malfunction, or 
when the hill hold assist* is switched on 
= page 105. 
Ne Cea ial 
Applies to: vehicles with Audi pre sense city 
Audi pre sense city uses  data from the camera 
and calculates within the limits of the system the 
probability of a collision with vehicles and pedes- 
trians. 
Audi pre sense city is active at speeds of approxi- 
mately 6 mph (10 km/h) and higher. 
It can warn about pedestrians at speeds up to ap- 
proximately 50 mph (85 km/h) and vehicles at 
speeds up to approximately 155 mph (250 
km/h). 
Automatic deceleration is possible at speeds up 
to 50 mph (85 km/h). 
Early warning/acute warning 
The system can recognize various dangerous sit- 
uations. The early warning occurs if: 
— Avehicle driving ahead brakes suddenly 
— Your own vehicle approaches a vehicle in front 
of you that is traveling at a significantly slower 
speed or that is stationary 
— A pedestrian is standing in the lane or is mov- 
ing into the lane 
A warning tone and the message Audi pre 
sense Bo or Audi pre sense wB (depending on ve- 
hicle equipment) will warn you about the danger. 
If there is an impending collision with vehicles, 
there may also be an acute warning in the form 
of sharp braking. You will also be warned by  an 
indicator in the instrument cluster display. When 
this warning occurs, it may only be possible to 
avoid a collision by swerving or braking strongly. 
Automatic deceleration 
If you do not react to the acute warning, Audi pre 
sense can brake the vehicle to a full stop within 
the limits of the system if the vehicle is traveling 
at low speeds. This reduces the vehicle speed in 
the event of a collision. 
Automatic braking force increase 
If Audi pre sense determines that  you are not 
braking strongly enough when a collision is immi- 
nent, it can increase the braking force based on 
the 
situation. 
  
Z\ WARNING 
— Follow the safety precautions and note the 
limits of the assist systems, sensors, and 
cameras > page 114. 
— Audi pre sense city cannot overcome natural 
physical laws. It is a system designed to as- 
sist and it cannot prevent a collision in every 
circumstance. The driver must always inter- 
vene. The driver is always responsible for 
braking at the correct time. Do not let the 
increased safety provided tempt you into 
taking risks. This could increase your risk of 
a collision. 
— Audi pre sense city does not react to certain 
objects, such as animals, crossing or oncom- 
ing vehicles, bars, railings, or railcars. 
— Audi pre sense city may be limited or un- 
available in curves or when it  is dark. 
— Loose objects can be thrown around the ve- 
hicle interior during sudden driving or brak- 
ing maneuvers, which increases the risk  of 
an accident. Store objects securely while 
driving. 
       
@) Tips 
Certain pre sense front functions will switch 
off when the ESC is restricted or switched off 
= page 110, when there is a malfunction, or 
when the hill hold assist* is switched on 
=>page 105. 
ONC t Le 
Applies to: vehicles with  Audi pre sense rear 
Within the limits of the system, Audi pre sense 
rear uses  data from radar sensors in the rear area 
of the vehicle and calculates the probability of a 
rear-end collision with the vehicle behind you. 
Audi pre sense preemptive safety measures can 
be initiated if the risk  of a collision with the vehi- 
cle behind you is detected. 
141 
>  
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Driver assistance 
  
  
ZA WARNING 
— Follow the safety precautions and note the 
limits of the assist systems, sensors, and 
cameras > page 114. 
— Audi pre sense rear does not react to pedes- 
trians, animals, crossing objects, and ob- 
jects 
not detected as vehicles. 
       
G@) Tips 
Audi pre sense rear functions may also switch 
off if there is a malfunction in the side assist 
system. 
Saree cid 
Applies to: vehicles with swerve assist 
The swerve assist can help  you to steer the vehi- 
cle around an obstacle detected in a critical area. 
If you avoid an obstacle after the acute warning, 
then the swerve assist assists you by applying 
slight steering adjustment to correct your steer- 
ing wheel angle as long as you are actively steer- 
ing. Swerve assist is available at speeds between 
approximately 20 mph (30 km/h) and 90 mph 
(150 km/h). 
  
ZA WARNING 
— Follow the safety precautions and note the 
limits of the assist systems, sensors, and 
cameras > page 114. 
— Swerve assist does not react to pedestrians, 
animals, crossing objects, and objects not 
detected as vehicles. 
@) Tips 
— System functions may not be available if the 
ESC is limited or switched off, or if there is a 
malfunction. 
      
— An indicator in the instrument cluster will 
inform you when there is an intervention. 
  
2) When making a right turn in countries with left-hand drive 
vehicles. 
2) Incertain countries 
142 
ae 
Applies to: vehicles with turn assist 
When your vehicle is turning 
The turn assist can assist you with a braking in- 
tervention when starting to drive or when driving 
slowly, to reduce the risk of your vehicle colliding 
with an oncoming vehicle when you are making a 
left turn). The braking intervention causes your 
vehicle to stay in its lane. The function is only 
available when the turn signal is turned on and at 
speeds up to maximum of 6 mph (10 km/h). 
  
Z\ WARNING 
— Follow the safety precautions and note the 
limits of the assist systems, sensors, and 
cameras > page 114. 
— The turn assist does not react to pedes- 
trians, animals, crossing objects, and ob- 
jects  not detected as vehicles. 
@) Tips 
— System functions may not be available if the 
ESC is limited or switched off, or if there is a 
malfunction. 
— An indicator in the instrument cluster will 
inform you when there is an intervention. 
Adjusting Audi pre sense 
Applies to: vehicles with Audi pre sense 
       
You can adjust the Audi pre sense functions to 
your preferences. The settings depend on the ve- 
hicle equipment. 
> Applies to MMI: Select on the home screen: VE- 
HICLE > Driver assistance > Audi pre sense. 
Possible settings: 
The pre sense functions can be switched on and 
off. 
Prewarning” - The prewarning can be switched 
off or the Audi pre sense warning time can be set 
(Early/Medium/Late). >  
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Driver assistance 
  
Set  the warning time for the early warning to 
Early at first. If this causes undesired early warn- 
ings to appear, then set the warning time to Me- 
dium. The Late warning time should only be set 
in special circumstances. 
   
Tips 
— If Audi pre sense is switched off, it switches 
on again automatically once the ignition is 
switched on again.) 
— Switch Audi pre sense off when you are not 
using public streets, when loading the vehi- 
cle onto a vehicle carrier, train,  ship, or oth- 
er type of transportation, or when towing 
the vehicle. This can help to prevent an un- 
desired intervention from the Audi pre 
sense system. 
— Certain settings are automatically stored 
and assigned to the remote control key be- 
ing used. 
Messages 
Applies to: vehicles with  Audi pre sense 
re ° is displayed when there is a malfunc- 
tion, the Audi pre sense functions may be un- 
available or may be limited. 
  
A message that indicates the cause and possible 
solution may appear with some displays. The 
weather conditions may be too poor or a sensor 
may be covered. Clean the area in front of the 
sensors © page 116 and try to turn on the sys- 
tems again later. 
If the malfunction remains, drive to an author- 
ized Audi dealer or authorized Audi Service Facili- 
ty immediately to have the malfunction correct- 
ed. 
  
D_Incertain countries 
Side assist 
  Cette) aCoy a) 
Applies to: vehicles with side assist 
  al 3  a z 
e| 
  
    
Fig. 126 Examples: driving situations and exterior mirror 
display 
General information 
Side assist monitors the  blind spot and traffic be- 
hind your vehicle and provides assistance when 
you are changing lanes. If the system detects an 
object approaching and classifies it as critical, the 
display @ in the exterior mirror on that side of 
the vehicle will turn on, 
Driving situations 
The side assist warning is active at speeds above 
approximately 9 mph (15 km/h) and can help in 
situations such as the following: 
@ Your vehicle is being passed. The faster an- 
other vehicle approaches from behind, the 
sooner the display in the outside mirror will 
turn on. 
@® There are vehicles traveling in the same direc- 
tion as you ina lane adjacent to yours. The 
display in the exterior mirror will turn on 
143 
>  
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Driver assistance 
  
when the detected object is in the “blind 
spot”, at the latest. 
@ You are slowly passing another vehicle. If the 
difference in speed between the two vehicles 
is less than 9 mph (15 km/h), the display in 
the exterior mirror will turn on. 
Information stage 
If you do not activate a turn signal, the system 
will inform you about objects classified as critical 
by turning on the display in the respective exteri- 
or mirror. The  display remains dim in the infor- 
mation stage so that you are not distracted while 
looking forward. 
Warning stage 
Once you activate a turn signal, the system will 
inform you about objects classified as critical by 
turning on the display in the respective exterior 
mirror. 
Depending on vehicle equipment, the display 
may also provide a warning when the turn signal 
is not activated: if driver assist systems detect 
that your vehicle is about to leave a lane, the dis- 
play will blink to warn you about objects classi- 
fied as critical. You can also be warned with cor- 
rective steering > page 137, Audi active lane as- 
sist. 
System limitations 
The system uses the data from the radar sensors 
at the rear corners of the vehicle > page 116, 
fig. 107. They are designed to detect the left and 
right adjacent lanes when the road lanes are the 
normal width. In some situations, the system 
may react to vehicles in your own lane or lanes 
that are not directly adjacent to yours, or  to ob- 
jects on the side of the road. In this case, the dis- 
play will turn on even though there is no vehicle 
in the critical area. These situations may include: 
— Driving on the edge of your own lane 
— Narrow lanes 
— Curves 
— High barriers on the side of the road 
144 
  
AN WARNING 
— Follow the safety precautions and note the 
limits of the assist systems, sensors, and 
cameras > page 114. 
— The  display may not appear on time when 
vehicles are approaching or being passed 
very quickly. 
G) Tips 
— If the window glass in the driver's door or 
front passenger's door has been tinted, the 
display in the exterior mirror may be incor- 
rect. 
  
    
— For an explanation on conformity with the 
FCC regulations in the United States and the 
Industry Canada regulations, see 
=>page 275. 
Adjusting side assist 
Applies to: vehicles with side assist 
You can adjust the side assist to your preferences. 
The settings depend on the vehicle equipment. 
> Applies to: MMI: Select on the home screen: 
VEHICLE > Driver assistance > Side assist. 
Possible settings: 
The system can be switched on and off. If the sys- 
tem is switched on, the displays in the exterior 
mirrors will turn on briefly each time the ignition 
is switched on. 
Brightness - Change the brightness only when 
side assist is switched on, so that the selected 
setting can be checked in the exterior mirror dis- 
plays. Adjust the brightness to a level where the 
display will not interfere  with your  view ahead. 
Because the display brightness automatically 
adapts to the ambient light, it may have already 
been adjusted to the highest or lowest setting 
during the automatic adaptation. 
G) Tips 
— If you switch side assist on or off, the exit 
warning will also switch on or off.  
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Driver assistance 
  
— Certain settings are automatically stored 
and assigned to the remote control key be- 
ing used. 
Messages 
Applies to: vehicles with side assist 
1f BW or Bis displayed when there is a malfunc- 
tion, the side assist and exit warning system 
functions may be unavailable or may be limited. 
A message that indicates the cause and possible 
solution may appear with some displays. The 
weather conditions may be too poor or a sensor 
may be covered. Clean the sensor area in the ve- 
hicle rear and try to turn the systems on again 
later. 
If the malfunction remains, drive to an author- 
ized Audi dealer or authorized Audi Service Facili- 
ty immediately to have the malfunction correct- 
ed. 
Exit warning 
  
Applies to: vehicles with exit warning system 
  
  
RAZ-0168. 
  
Fig. 128 Front door: exit warning 
General information 
Within system limits, the exit warning system 
can detect traffic approaching from behind such 
as vehicles, and provide assistance based on this 
information when you are exiting the vehicle 
> fig. 127. The system uses the data from the ra- 
dar sensors at the rear corners of the vehicle. 
Displays and warnings 
If a door is opened while the vehicle is stationary, 
the warning strip @ on that door and the display 
@ on that side of the vehicle will blink if another 
road  user is detected in a critical situation, If an- 
other road  user  that is classified as critical is ap- 
proaching while a door is already open, the dis- 
plays on that door will turn on. 
The same messages apply for the exit warning 
system and side assist > page 145. 
  
-Z\ WARNING 
— Follow the safety precautions and note the 
limits of the assist systems, sensors, and 
cameras > page 114. 
— Always pay attention to traffic and to the 
area around your vehicle. The exit warning 
system does not replace the attention of the 
vehicle occupants. The vehicle occupants are 
always responsible for opening the doors 
and exiting the vehicle. 
— The exit warning system does not respond 
to people and cannot warn you about every 
type of approaching objects, such as cyclists. 
Always monitor the traffic as well as the ve- 
hicle's surroundings with direct eye contact. 
— The  display may not appear in time when 
vehicles are approaching very quickly. 
— The exit warning system does not react to 
stationary objects or pedestrians. 
— The exit warning system will not provide 
alerts if your vehicle is pulled too far into 
the parking space so that it is hidden by ad- 
jacent vehicles. 
iG) Tips 
— The exit warning is switched on or off by the 
side assist warning > page 144. 
      
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Driver assistance 
  
— The exit warning  system can be available for 
up to approximately three minutes after un- 
locking the vehicle and opening the door as 
well as after switching off the ignition. Then 
the displays flash briefly and the system 
switches off. 
— The display brightness for the exit warning 
system cannot be adjusted. 
— For an explanation on conformity with the 
FCC regulations in the United States and the 
Industry Canada regulations, see 
=> page 275. 
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Parking and maneuvering 
  
Parking and 
maneuvering 
Introduction 
Depending on the vehicle equipment, various 
parking aids will help  you when parking and ma- 
neuvering. 
Parking aid 
The parking aid plus assists you while parking 
using audio and visual signals to warn you about 
objects detected in front of, behind, and next to* 
the vehicle > page 147. 
The rearview camera shows the area behind the 
vehicle in the center display. The lines in the rear- 
view camera image help you to park and maneu- 
ver > page 149. 
The peripheral cameras are an addition to the 
rearview camera and help you to see various 
areas around the vehicle while parking and ma- 
neuvering > page 149. 
The rear cross-traffic assist can warn you of ap- 
proaching cross traffic when driving in reverse or 
exiting a parking space > page 152. 
Assisted parking 
Park assist helps you to find suitable parking 
spaces and to park in and exit these spaces while 
the driver monitors the area around the vehicle 
and 
controls the parking process. Park assist con- 
trols the steering movements when parking in 
free parking spaces.  The driver is still responsible 
for accelerating, braking, and shifting gears 
=> page 154. 
Settings options 
You can adjust parking aid functions individually. 
The adjustment options depend on the vehicle 
equipment. 
— Activating automatically > page 147 
— Front and rear volume > page 148 
— Entertainment fader > page 148 
— Clean rearview camera > page 150 
— View > page 151 
— Rear cross-traffic assist > page 153 
  
ZX WARNING 
Follow the safety precautions and note the 
limits of the assist systems, sensors, and 
cameras > page 114. 
@ Tips 
Practicing parking in a traffic-free location or 
parking lot to become familiar with the sys- 
tems is recommended. Practice parking in 
good light and weather conditions. 
  
    
Parking aid plus 
Ne Ee st CLL] 
Applies to: vehicles with parking aid plus 
General information 
The parking aid assists when parking and maneu- 
vering by providing warnings about obstacles. If 
the ultrasonic sensors on the vehicle > page 116, 
fig. 107 detect an obstacle, the system will pro- 
vide 
audio and visual warnings. 
Activating/deactivating 
Requirement: the vehicle speed must be under 
approximately 6 mph (10 km/h). 
> Press the Pt button in the center console. 
When activating, a brief tone will sound and 
the LED in the button will turn on. 
Automatic activation 
> The system activates automatically when re- 
verse gear is engaged while the engine is run- 
ning. A brief tone will sound. 
If Automatic activation is switched on in the 
MMI and if the vehicle approaches an obstacle at 
speeds below approximately 6 mph (10 km/h), 
the parking aid will switch on automatically. Au- 
dible signals will sound once the obstacle is with- 
in the sensor detection area. 
>» Applies to: MMI: To switch Automatic activa- 
tion on or off, select on the home screen: VEHI- 
CLE > Parking aid > Automatic activation. 
Automatic deactivation 
The distance indicator for the parking aid plus 
will deactivate automatically when driving 
147  
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Parking and maneuvering 
  
forward faster than approximately 6 mph (10 
km/h). 
  
ZA\ WARNING 
Follow the safety precautions and note the 
limits of the assist systems, sensors, and 
cameras > page 114. 
@) Note 
Keep enough distance from the curb to avoid 
damage to the rims. 
G) Tips 
— If the parking aid is switched off, it can only 
be reactivated automatically when one of 
the following conditions is met: 
— The vehicle speed exceeds 6 mph (10 km/h) 
— The ignition was switched off and back on 
again 
— The parking brake was set and then released 
— The “P” gear was engaged and released 
again 
      
  
Applies to: vehicles with parking aid plus 
  
Fig. 129 Center display: distance display 
If the sensors detect an obstacle, audible and vis- 
ual signals will warn you. 
Visual warnings 
The visual warnings in the center display help  you 
to detect the critical vehicle area and to estimate 
the distance to an obstacle. 
Red segments (2) show detected obstacles that 
are in your vehicle's path. The red lines 2) mark 
the expected direction of travel based on the 
steering angle. A white segment (8) indicates a 
detected obstacle that is outside of the vehicle's 
148 
path. The closer your vehicle comes to the obsta- 
cle, the closer the segments will move to the ve- 
hicle. The collision area has been reached when 
the next to last segment is displayed. Obstacles 
in the collision area, including those  outside of 
the vehicle's  path, are shown in red. Do not con- 
tinue driving farther. 
Audio signals 
The closer your vehicle gets to a detected obsta- 
cle, the shorter the time between the audible sig- 
nals. A continuous tone sounds when an obstacle 
is less than approximately 1 foot (0.30 m) away 
from the front or rear of the vehicle. A continu- 
ous tone sounds when an obstacle is less than 
approximately 0.7 feet (0.20 m) away from the 
sides* of the vehicle. Do not continue driving for- 
ward or in reverse >@). 
> To deactivate audio signals while parking, press 
(Jin the center display. The audio signals will 
be automatically activated again the next time 
the parking aid is activated. 
Adjusting the volume 
You can adjust the volume to your preferences. 
The settings depend on the vehicle equipment. 
> Applies to: MMI: Select on the home screen: 
VEHICLE > Parking aid. Or: 
> Press L-] in the center display when the parking 
aid is active. 
  
      
Possible settings: 
Front volume - Volume for the front and side* 
area. 
Rear volume - Volume for the rear area. 
Entertainment fader - The volume of the audio/ 
video source is lowered when the parking aid is 
activated. 
The new level is demonstrated briefly* when the 
volume is adjusted. 
Error messages 
If P4 appears, the sensor in the respective area 
or the speaker is faulty. Drive immediately to an 
authorized Audi dealer or authorized Audi Service 
Facility to have the malfunction repaired.