2021 AUDI A8 sensor

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

Assist systems

— Basic or All off - Only the basic systems are
switched on in this profile. If no basic system is
available, the profile is named All off.

Observe the safety precautions and note the
limits of the assist systems, sensors, and
cameras > page 150.

154

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.

4N0012721BF
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

4N0012721BF
Driving information

After completing a lap, the difference between
the last lap and the previous best lap time will be
indicated with a “~” or “+”.
Pausing timing and displaying a split time
> To insert a pause @ select Pause in the menu.
> To resume timing, select Resume in the menu.
> To display a split time, select Split time in the
menu. The split time appears for approxi-
mately ten seconds in the instrument cluster.
The current lap timing will continue running.
Canceling lap timing
The timing of the current lap will stop. The lap
time will be erased and will not be included in the
statistics.
>» Select Cancel lap in the menu.
Resetting the time
> Select Reset lap times in the menu.
@ Tips
—A maximum of 99 lap times can be meas-
ured.
— If timing is paused, you can continue it later
even if you switch the ignition off.
— Saved lap times cannot be individually de-
leted from the total results.
— The saved lap timer values will remain after
switching the ignition off.
Lap stati
Applies to: vehicles with lap timer

Displaying lap statistics
You can display the number of laps driven ES
the fastest lap “+”, the slowest lap “~”, and the
average time “®” in the instrument cluster.
> Select in the instrument cluster: Vehicle func-
tions tab > I button > Lap statistics.
> Turn the thumbwheel down or up to display the
individual lap times.
> To return to the lap timing that was started, se-
lect the [J button > Lap times.
Resetting lap statistics
Requirement: the lap statistics menu must be
displayed.
> To reset the lap statistics, press and hold the
left thumbwheel until the message No lap
times have been recorded yet. appears.
@) Tips
The lap statistics list the lap times for the last
30 laps. The fastest and slowest lap times out
of up to 99 measured laps are also displayed.
Night vision assist
Applies to: vehicles with night vision assist
Night vision assist helps you when it is dark by
using an infrared camera to monitor the area in
front of your vehicle, within the limits of the sys-
tem. It can display objects up to a distance of ap-
proximately 1000 feet (300 m).
Pedestrian and wild animals are detected by
measuring the temperature difference between
the object and the background. Pedestrians and
wild animals will not be detected if the tempera-
ture difference is too small. The pedestrian and
wild animal marking feature is deactivated at
temperatures above approximately 77 °F (25 °C)
and when it is light outside.
The thermal image detected by the camera is dis-
played in the instrument cluster. Warm areas
generally appear lighter and cold areas appear
darker.
The camera for the night vision assist is located
in the vehicle's radiator grille > page 152. Make
sure the night vision camera is not covered by
stickers, deposits, or any other obstructions be-
cause this can impair the night vision assist func-
tion. Follow the information about cleaning
=> page 310.

ZX WARNING
— Observe the safety precautions and note the
limits of the assist systems, sensors, and
cameras > page 150. >

159

Driver assistance

An additional indicator will appear in the head-up
display*.
Changing the cruise control speed
Applies to: vehicles with cruise control system
Requirement: the system must be switched on.
> To increase or decrease the cruise control speed
in small increments, tap the lever up to the
first level toward @)/G) 9 page 163, fig. 116.
> To increase or decrease the cruise control speed
in larger increments, tap the lever up to the
second level toward @)/G).
> To increase or decrease the cruise control speed
continuously, tap and hold the lever at the first
or second level toward @)/G).
Overriding or deactivating the cruise
control speed
Applies to: vehicles with cruise control system
You can override or deactivate the cruise control
system. When you deactivate the system, your
cruise control speed will be stored and you can
resume that speed.
Requirement: the system must be switched on
and the regulated speed must be activated.
Overriding
> To temporarily override the cruise control
speed, press the accelerator pedal.
> To resume the stored regulated speed, remove
your foot from the accelerator pedal.
If you override the cruise control system for a
long period of time, the cruise control system
will be deactivated. The [Ud or [RM indicator
light will be displayed and the cruise control
speed will be saved.
Deactivating
> To deactivate the cruise control speed, press
the lever toward @) (not locked into place)
=> page 163, fig. 116, or
> Press the brake pedal.
164

ZA WARNING
Resting your foot on the accelerator pedal
could override the cruise control. This will pre-
vent braking interventions by the system.
See me Lai
Applies to: vehicles with cruise control system

When you switch the system off, the cruise con-
trol speed will be erased.
Requirement: the system must be switched on.
> To switch the system off, press the lever toward
@ (locked into place) > page 163, fig. 116, or
> Switch the ignition off.
Applies to: vehicles with cruise control system
Gir / 3) Speed control system: currently un-
available. See owner's manual
If the indicator light turns on and this message
appears, the cruise control system has been deac-
tivated. There is a temporary malfunction, for ex-
ample the brakes are overheating. Switch the
cruise control system on again later.
Efficiency assist
Applies to: vehicles with efficiency assist
Efficiency assist can assist the driver with predic-
tive information in order to reduce fuel consump-
tion. Depending on vehicle equipment, the sys-
tem may access data from the navigation system,
the camera behind the windshield, and the radar
sensors.
Adjusting the efficiency assist
You can adjust efficiency assist functions individ-
ually. The settings depend on the vehicle equip-
ment.
— Accelerator pedal feedback > page 111.
— Interactive accelerator > page 111.
— Predictive messages > page 165.
— Predictive control > page 174, Adjusting the
adaptive cruise assist.

4N0012721BF
Driver assistance

Situation symbols
Depending on vehicle equipment, the following
symbols may be shown. The symbols indicate the
situation to which the efficiency assist is respond-
ing.
Some symbols only appear if Predictive messag-
es are switched on, and some symbols only ap-
pear if Predictive control is switched on and
adaptive cruise assist* is active.


Description
Slow down
(predictive messages only)
Speed limit
(example)
Speed limit removed
Exit ahead
Intersection ahead
Traffic circle ahead
(predictive control only) If the indica-
tor light turns on in green and red, it
is indicating that there is a difference
between the speed limit and the set
speed.


ZA WARNING
— Observe the safety precautions and note the
limits of the assist systems, sensors, and
cameras > page 150.
—Incertain situations, the recuperation may
brake proactively. However, the recuperation
braking effect is limited. Always be ready to

brake to reduce the risk of an accident.

@ Tips
— The functions depend on the navigation da-
ta* being up-to-date and correct identifica-
tion by the traffic sign recognition*.
— The system only detects traffic signs that
specify a 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.
— Except for the road network, which is re-
corded in the navigation system’s map infor-
mation, certain functions may not be availa-
ble.
Predictive messages
Applies to: vehicles with efficiency assist
The symbol BS appears in the instrument cluster
display if efficiency assist recommends removing
your foot from the accelerator pedal.
Additional symbols that indicate the situation to
which the efficiency assist is reacting are shown
in the Driver assistance display > page 165.
Requirements
— The cruise control system* or the adaptive
cruise assist* controls must not be active.
— The vehicle speed must be at least 20 mph
(30 km/h).
— The remaining distance until the situation is
reached must be large enough to allow the sys-
tem to react to the situation.
Switching Predictive messages on or off
Applies to: MMI: Select on the home screen: VE-
HICLE > Charging & Efficiency > Efficiency assist
> Predictive messages.

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 efficiency assist is switch-
ed on. The driver is always responsible for
assessing the traffic situation.
G) Tips
— The traffic signs on the road always take pri-
ority over the display. The driver is always
responsible for adhering to the regulations

165

Driver assistance

applicable in the country where the vehicle
is being operated.
— When a route is planned using the naviga-
tion system*, then system displays messag-
es based on an assumed route. Without
route guidance, the system displays mes-
sages based on an assumed route.
— The wording of the message may vary de-
pending on the selected Audi drive select*
mode and the selected gear. No messages
are displayed when in the "S" driving pro-
gram.
Adaptive cruise assist
General information
Applies to: vehicles with adaptive cruise assist

Depending on the vehicle equipment, the adap-
tive cruise assist may consist of the following
functions:
Within the limits of the system, the adaptive
speed assist assists the driver in controlling the
speed and the set distance to the vehicle driving
ahead. If the system detects a vehicle driving
ahead, the adaptive speed assist can brake and
accelerate your vehicle within the limits of the
system. On open roads with no traffic, it Func-
tions like a cruise control system. The stored
speed is maintained. When approaching a vehicle
driving ahead, the adaptive speed assist auto-
matically brakes to match that vehicle's speed
and then maintains the set distance as much as
possible. Once the system does not detect a vehi-
cle driving ahead, adaptive speed assist will ac-
celerate up to the set speed.
The additional lane guidance assists the driver
with corrective steering in order to stay in the
lane. You can adjust if the adaptive cruise assist
will provide support with lane guidance
=> page 169, Switching lane guidance on and off.
In stop-and-go traffic and in traffic jams, the ve-
hicle may brake to a full stop and then may also
start driving again automatically under certain
conditions.
Applies to: vehicles with efficiency assist: Predic-
tive control can adjust the speed based on traffic
166

and road conditions > page 170, Predictive con-
trol.

ZA WARNING
Observe the safety precautions and note the
limits of the assist systems, sensors, and
cameras > page 150.
@ Tips
The system complies with United States FCC
regulations and ISED regulations > page 341.


mitations
Applies to: vehicles with adaptive cruise assist
B4m-0093

Fig. 117 Example: driving into a curve
In some situations, the adaptive cruise assist
function is limited and you must assume control
of the vehicle when necessary, for example by ap-
plying the brakes.
— When driving into a curve > fig. 117 and out of
a curve, the system may react to a vehicle in the
neighboring lane and apply the brakes. You can
override the system by pressing the accelerator
pedal briefly.
— The system works with the various sensors and
cameras in the vehicle. Vehicles can only be de-
tected once they are within the area and range
covered by the sensors > page 151, fig. 108.
— When driving around tight curves, a vehicle
driving ahead that was previously detected may
no longer be detected, and the adaptive cruise
assist may accelerate unexpectedly.
— The system does not react to a stationary vehi-
cle in the same lane if it expects that you can
easily drive around the stationary vehicle by
turning the steering wheel.