2021 AUDI A8 service

Trailer towing

you are operating the vehicle. Contact an author-
ized Audi dealer or authorized Audi Service Facili-
ty for more information.
Before you start driving, check all lighting equip-
ment on the trailer while it is hitched to the vehi-
cle.
The headlight range control automatically ad-
justs the light range of the headlights.
Safety chains
Make sure the safety chains are correctly applied
when pulling a trailer. The chains should hang
enough so that the trailer can drive around
curves. However, they must not touch the
ground.
Air suspension
Applies to: vehicles with air suspension
The Audi drive select* comfort mode > page 124
must be selected before you adjust the tongue
weight on the trailer and hitch the trailer >@,
=> page 126.
Likewise, the vehicle cannot be raised manually
using the Raise function > page 126.
The air suspension trailer mode must be switched
on.
Applies to MMI: select on the home screen: VE-
HICLE > Settings & Service > Air suspension:
trailer.
Switch trailer mode off again when you are no
longer towing a trailer.
When using rear carrier systems that are mount-
ed directly on the trailer hitch ball head, you can
also switch trailer mode off manually.
If you must drive on roads that are in poor condi-
tion, you can raise the vehicle again after hitching
the trailer or after adjusting the tongue weight
=> page 126.
Vehicle levels below the values set in the comfort
level will no longer be available, even if you are
lowering the vehicle manually.
148

ZA WARNING
Applies to: vehicles with air suspension
— Never turn off trailer mode while driving
when a trailer is hitched, because then the
restrictions for controlling the vehicle level
will be turned off.
— Driving with a trailer on unpaved roads when
the vehicle is raised may change the vehicle
handling. Adapt your speed.
— Note that the vehicle will lower automatical-
ly at certain speeds if you have lifted the ve-
hicle manually.
C) Note
— Applies to: vehicles with air suspension: Se-
lect the Audi drive select* comfort mode.
Otherwise, the tongue load specified for
your vehicle will no longer be applicable.
— Attachments retrofitted on the vehicle may
cause damage, especially on the trailer
hitch ball head. In cases of damage, have
the function checked by an authorized Audi
dealer or authorized Audi Service Facility.
@) Tips
— Block the wheels with chocks when parking
on inclines if the trailer is loaded.
— Audi recommends having the vehicle in-
spected between the inspection intervals if
you tow a trailer frequently.
— Avoid driving with a trailer during the vehi-
cle break-in period.
Pie Rie Relig
Driving with a trailer requires extra caution.

Speed
Adhere to the legal speed limits. Follow the legal
regulations that are applicable in the country
where you are operating the vehicle.
As the speed increases, the driving stability of
the trailer decreases. Therefore you should not
exceed the maximum legal speed limit when
there are unfavorable road, weather, and/or wind
conditions. This especially applies when driving
downhill.

4N0012721BF

Assist systems

Surrounding area
detection

SY d camera coverage areas

RAZ-0610)




B8V-0687


Fig. 109 Rearview camera coverage area
The assist systems analyze the data from various
sensors and cameras installed in the vehicle. Do
not use any assist systems if there is damage to
the vehicle in an area where sensors and cameras
are located or on the vehicle underbody, or if the
vehicle was involved in a collision. The functional-
ity of the sensors and cameras could be impaired,
or they could malfunction. Have an authorized
Audi dealer or authorized Audi Service Facility
check their function.
Radar sensors
Depending on the vehicle equipment, the area
surrounding the entire vehicle may be detected
> fig. 108 @.
The wheel sensors on the rear corners of the vehi-
cle are positioned so that the adjacent lanes to
the left and right are detected on roads with a
normal lane width.
Ultrasonic sensors
Depending on vehicle equipment, various areas
may be displayed in the MMI using the ultrasonic
sensors > fig. 108.
The range of the displays depends on the location
of the ultrasonic sensors:
@ Approximately 4 feet (1.20 m)
@® Approximately 3 feet (0.90 m)
@® Approximately 5.2 feet (1.60 m)
© Approximately 3 feet (0.90 m)
© Approximately 3 feet (0.90 m)
The side area © is detected and evaluated when
passing. There may have been changes to the sur-
rounding area after switching the ignition off and
on again, after opening the doors, or if the vehi-
cle is left stationary for a period of time. In this
case, the area will appear black until the area has
been detected and evaluated.
Cameras
Use the camera image on the display to assist you
only if it shows a good, clear picture. Keep in
mind that the image in the display is enlarged
and distorted. Under certain circumstances, ob-
jects may appear different and unclear on the dis-
play.
The rearview camera can only detect the area
marked in red > fig. 109. Only this area is dis-
played on the upper display > A\.

ZA WARNING
Sensors and cameras have spots in which the
surrounding area cannot be detected. Objects,
animals, and people may only be detected
with limitations may not be detected at all.
Always monitor the traffic and the vehicle's >


151

4N0012721BF
Assist systems

Rear area
Depending on the vehicle equipment, the follow-
ing sensors and cameras may be installed:
— Rearview camera in the luggage compartment
lid
— Radar sensors at the rear corners of the vehicle
— Rear and side ultrasonic sensors
Switching the systems
on and off


ZA\ WARNING
Applies to: vehicles with laser scanner
— The surface of the laser scanner can become
hot during operation, which increases the
risk of burns.
— The laser scanner contains a class 1 laser in
accordance with IEC 60825-1:2014. When
used according to regulations, the laser is
not dangerous. Opening the laser module
and removing covers is not permitted. Doing
so could cause permanent injuries to the
eyes.
— Any repair work on the laser module must
be performed by an authorized Audi dealer
or authorized Audi Service Facility; other-
wise the vehicle's operating license may be
voided. Incorrect repairs may cause limited
functionality and eye damage.




@) Tips
Applies to: vehicles with laser scanner
— The possible emissions are below the
threshold for class 1 lasers.
— Complies with 21 CFR 1040.10 and
1040.11 except for deviations pursuant to
Laser Notice No. 50, dated June 24, 2007.
@ Tips
— The locations of the sensors may differ
slightly depending on vehicle equipment.
— Some sensors are installed under vehicle
components and cannot be seen from the
outside.
— The system complies with United States FCC
regulations and ISED regulations
=> page 341.

Fig. 112 Center console: driver assistance systems button
Description
You can switch some assist systems on and off in
the MMI. Depending on the equipment, it may be
in the standard display or the profile selection.
> Press the & button (, or
> Applies to MMI: Select on the home screen: VE-
HICLE > Driver assistance.
Standard display
Applies to: vehicles with standard display
> To switch a system on or off, press CD for the
desired system.
> To show the brief description of a system, press
© for the desired system.
Profile selection
Applies to: vehicles with profile selection
> To select a profile, press the profile name on
the upper display or press the & button (@ re-
peatedly until the profile is active.
> To list systems included in a profile, select E]
on the upper display.
> To show the brief description of a system, se-
lect @ for the desired system.
> To switch individual systems on and off in the
Individual profile, select ¥ and CD for the de-
sired systems.
The following profiles can be selected:
— Maximum - All available systems are switched
on in this profile.
— Individual - You can switch the systems on and
off individually in this profile.
153

Driving information

— If traffic signs do not conform to the standard
format
— If traffic signs are damaged or bent
— If traffic signs are displayed on sign holders
with electronic signs
— If the traffic signs or the roadways have
changed, and the navigation data is no longer
up-to-date

Z\ WARNING
— Observe the safety precautions and note the
limits of the assist systems, sensors, and
cameras > page 150.
— Under some circumstances, traffic sign rec-
ognition may not detect traffic signs correct-
ly or detect them at all. As a result, the sys-
tem may not display the correct speed limit
or any speed limit.
@) Tips
— Traffic sign recognition does not adapt your
vehicle's speed to match the speed Limit.

— The display in the instrument cluster is
based on the units of measurement used for
speed in the country where the vehicle is be-
ing operated. As a result, a display of 50 in
the instrument cluster can mean either mph
or km/h, depending on the country.
Applies to: vehicles with camera-based traffic sign recognition
Accessing traffic sign recognition
> Select in the instrument cluster: vehicle func-
tions tab > Traffic signs.
Setting a traffic sign based speed warning
> Applies to MMI: Select on the home screen: VE-
HICLE > Driver assistance > (<3) > Speed warn-
ing.
You can select a warning threshold. If you exceed
this, then the current detected speed limit will be
shown in the display with an exclamation point
for the duration that it is exceeded and it will
blink for a short time.
156
IY ett Tel -1
Applies to: vehicles with camera-based traffic sign recognition
Traffic sign recognition: currently unavaila-
ble. Camera view limited due to surroundings
The camera’s visual field is covered. Clean the
windshield.
Traffic sign recognition: currently limited.
See owner's manual
This message appears if navigation system data
is not available, for example on newly-construct-
ed roads. The speed limit display will be tempo-
rarily limited, which increases the risk of an incor-
rect display. If this message continues to appear,
drive immediately to an authorized Audi dealer or
authorized Audi Service Facility to have the mal-
function repaired.
No traffic sign information available
Depending on the area, there is no valid naviga-
tion data and no speed limits were detected. This
may also appear if there is a recommended
speed, but no speed limit (for example when
driving on and off the expressway).
Malfunction! See owner's manual
The system may not function correctly so it has
been switched off. See an authorized Audi dealer
or authorized Audi Service Facility for assistance.
Function currently unavailable. See owner's
manual
If this message appears on vehicles without cam-
era-based traffic sign recognition, then the traffic
light
information function is currently unavaila-
ble. See > page 158.

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Driving information

Traffic light information
Applies to: vehicles with traffic light information

Fig. 114 Instrument cluster: traffic light information dis-
play
The traffic light information gives you a speed
recommendation in order to reach the next traffic
light when it is green @, or it informs you of the
wait time at the next red light 2). Once traffic
light
data is received, the traffic light information
will be displayed in the instrument cluster and in
the head-up display*. If the vehicle is in an area
with traffic light information but cannot receive a
traffic light signal, then a gray traffic light sym-
bol will be displayed @).
General information
The traffic light information is subject to system
limitations and may be unavailable or only parti-
ally available in the following situations:
—If the permitted speed limit is exceeded
— If driving below a certain speed limit
— If the next traffic light is less than approxi-
mately 100 feet (30 m) away
—If the estimated wait time at a red light is less
than four seconds
— If there is no traffic light data available
— If emergency response vehicles or public transit
systems are active
— If traffic lights are in construction zones or be-
ing serviced
— If there are warnings from the camera-based
traffic sign recognition*
— If the camera-based traffic sign recognition* is
malfunctioning or not available
—If the data connection has been interrupted
— If data transmission is deactivated in the priva-
cy settings
— If the subscription has expired
If this is the case, the menu item will be grayed-
out or it will not be possible to select it.

ZX WARNING
— When traffic light information is shown, al-
so always pay attention to the traffic situa-
tion, the distance to other vehicles, and the
area around the vehicle. The driver is always
responsible for assessing the traffic situa-
tion.
— Always adapt your speed to the current
weather, road and traffic conditions. The dis
played information must never cause you to
ignore legal traffic regulations and pose a
safety risk.
— Regardless of the traffic light information,
you should always monitor your speed using
the speedometer and make sure you are ad-
hering to the legal speed limit.
— The traffic light information does not adjust
your vehicle's speed to the speed recom-
mendation shown in the display.
— Observe the safety precautions and note the
limits of the assist systems, sensors, and
cameras > page 150.
(i) Tips
— Traffic light information was only available
in select cities at the time this manual was
printed.
— Traffic light information is not available na-
tionwide.


— The functions depend on the navigation da-
ta* being up-to-date and correct identifica-
tion by the traffic sign recognition*.
— Incorrect values from the camera-based
traffic sign recognition* or outdated naviga-
tion system* map data can result in missing
or incorrect display images.
— Certain traffic lights can automatically ad-
just to the current traffic situation. If this
occurs, the display of traffic light informa-
tion can change suddenly.
157

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Driving information

The Sl symbol will appear when pedestrian and
wild animal detection is not available.
Marking light*
To direct the driver's attention to a pedestrian,
the headlights can flash on the pedestrian when
there is a pedestrian warning.
This occurs at speeds above approximately
35 mph (60 km/h) if you are outside of illuminat-
ed areas and no detected vehicles are shown. The
marking light is not used for wild animals. The
high beam assistant* controls the marking
light*> page 59.
Adjusting the contrast
Applies to: vehicles with night vision assist
Requirement: the night vision assist must be
switched on and the 1 tab must be displayed.
> Applies to MMI: Select on the home screen: VE-
HICLE > Driver assistance > (<2) > Night vision
assist.
> To set the desired contrast, move the slider.
Messages
Applies to: vehicles with night vision assist
Night vision assist: currently unavailable.
See owner's manual
The system is not functioning correctly at the
time, so it has been switched off. If the malfunc-
tion persists, drive immediately to an authorized
Audi dealer or authorized Audi Service Facility to
have the malfunction repaired.
Integrated Toll Module
Applies to: vehicles with Integrated Toll Module
Depending on the region, you can pay toll fees in
certain countries using the Integrated Toll Mod-
ule (ITM). It replaces a separate transponder for
detecting toll fees. The system electronics are in-
tegrated in the rearview mirror housing.
To use the ITM in toll zones, you must register
and activate it.
Registration
> Applies to MMI: Select on the home screen: VE-
HICLE > Settings & Service > Vehicle informa-
tion Toll module.
> Note the Integrated Toll Module ID.
> To register the ITM, go to the displayed web ad-
dress and follow the instructions.
Activation
> To activate the ITM, press CD in the MMI.
Entering the number of passengers
Depending on the number of passengers and the
region, a lower toll fee may be charged. You must
either enter the number of passengers or deacti-
vate the ITM based on the laws applicable in the
area where you are driving.
> To enter the number of passengers, select the
appropriate button in the MMI.
> To deactivate the ITM, press C in the MMI.
@) Tips
— The driver is responsible for specifying the
correct number of passengers and activat-
ing or deactivating the ITM.
— Malfunctions can occur when detecting tolls
if both the ITM and transponder are activat-
ed. Deactivate the system not being used or
remove it as necessary.
—Ifa rearview mirror is replaced, you must
register the new ITM and remove the old
ITM from the account.
—The system complies with United States FCC
regulations and ISED regulations
> page 341.
Display
Applies to: vehicles with Integrated Toll Module
The selected number of passengers is displayed
in the MMI status bar > page 23.
The ii symbol in the status bar and a notifica-
tion in the MMI will indicate if there is a faulty
connection between the ITM and the MMI or if
the ITM is faulty. If the connection interference
continues or the ITM is faulty, drive immediately >
161

Driving information

to an authorized Audi dealer or authorized Audi
Service Facility.
162

4N0012721BF
Driver assistance

— The system can only react to speed limits that
are 15 mph (20 km/h) or higher.
Display in the speedometer
The display depends on vehicle equipment and is
not available in all layouts”.
@ The marking shows the set speed (regulated
speed that was set by the driver or by predic-
tive control).
@ The red band shows the difference between
the speed limit and the set speed that is set.
@® The gray band shows if the vehicle speed is
planned to drop below the set speed due to
the road layout.
Overriding control
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 168, fig. 121.
Messages
If and a message with Adaptive cruise assist:
Predictive control is displayed when there is a
malfunction, the efficiency assist functions are
unavailable or 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 152 and try to turn the system 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.

switched on. The driver is always responsible
for assessing the traffic situation.
— The system does not consider “right of way”
rules and does not respond to traffic lights,
so lack of driver attention in these situations
can increase the risk of an accident.
— The speed when driving through curves may
be different from what you as a driver would
do or may not be suitable for the weather
and road conditions. If necessary, apply the
brakes and reduce the selected speed to be
maintained in the Adjustment to curves
along route setting to reduce the risk of an

accident.


ZA WARNING
— Observe the safety precautions and note the
limits of the assist systems, sensors, and
cameras > page 150.
— Pay attention to traffic and the area around
your vehicle when predictive control is


D In certain countries.
Gi) Tips
— Predictive control can exceed or drop below
the maximum permitted speed. The driver
is responsible for adhering to the permitted
speed limit.
— The traffic signs on the road always take pri-
ority over the display. The driver is always
responsible for adhering to the regulations
applicable in the country where the vehicle
is being operated.
— Ifa speed limit is detected, the marking @
of the set speed Limit will be adjusted even
if the adaptive cruise assist is not actively
regulating.
— Control by the system depends on which
adaptive cruise assist driving program is set
or on the selected Audi drive select* mode.
— After switching on the ignition and first
driving onto a freeway or similar road with-
out a speed limit, the system will regulate
the speed to 80 mph (130 km/h)). Then
the system adjusts to the last speed set by
the driver.
— There is no adaptation to speed limits when
driving through highway interchanges and
when driving on or off the expressway.
— The system can fail to provide control or the
control may be faulty if the values from the
camera-based traffic sign recognition* are
171
>