2020 AUDI A4 sensor

8W1012721BB
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
G) 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.
117

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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

ZA WARNING
— Follow the safety precautions and respect
the limits of the assist systems, sensors,
and cameras > page 114.
— 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:
VEHICLE > Driver assistance > Speed warning.
You can select a warning threshold. If it is ex-
ceeded, 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.
Applies to: vehicles with camera-based traffic sign recognition
Traffic sign recognition: unavailable. Camera
view limited due to environm. conditions
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 121.
119

Driving information

Traffic light information
Applies to: vehicles with traffic light information

Fig. 109 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
— Ifthe 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
120
— 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.

ZA\ 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.
— Follow the safety precautions and note the
limits of the assist systems, sensors, and
cameras > page 114.

(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.

Driver assistance

An additional indicator appears in the head-up
display*.
Changing the cruise control speed
Applies to: vehicles with cruise control system
> To increase or decrease the cruise control speed
in small increments, tap the lever up to the
first level toward @)/G) > page 123, fig. 110.
> To increase or decrease the cruise control speed
in larger increments, tap the lever up to the
second level toward @)/C).
> To increase or decrease the cruise control speed
continuously, tap and hold the lever at the first
or second level toward @)/C).
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 activated.
Overriding
> To temporarily override the cruise control
speed, press the accelerator pedal.
> Once you release the accelerator pedal, the sys-
tem will adjust back to the stored cruise control
speed.
If you override the cruise control system for a
long period of time, the cruise control system
will be deactivated. The Gg or {§8) indicator
light will be displayed and the cruise control
speed will be saved.
Deactivating
> To deactivate the cruise control speed, press
the lever toward (2) (not locked into place)
=> page 123, fig. 110, or
> Press the brake pedal.
124

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

When you switch the system off completely, the
cruise control speed will be deleted.
Requirement: the system must be switched on.
> To switch the system off, press the lever toward
@ (locked into place) > page 123, fig. 110, or
> Switch the ignition off.
Applies to: vehicles with cruise control system
Gir / §) 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.
— Predictive messages > page 125.
— Predictive control > page 126.

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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 Audi
adaptive cruise control* is actively regulating the
vehicle.


Symbol |Description

Slow down
(predictive messages only)
Adjustment to curves along route
(predictive control only) Additional
symbols are shown in the Driver as-
sistance display.
Speed limit
Speed limit
Exit ahead
Intersection ahead
Traffic circle ahead

ZA WARNING
Follow the safety precautions and note the
limits of the assist systems, sensors, and

cameras > page 114.

@ 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
km/h or mph, 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.
— Certain settings are automatically stored
and assigned to the remote control key be-
ing used.
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 125, Sit-
uation symbols.
Requirements
— The cruise control system* or Audi adaptive
cruise control* must not be actively regulating.
— 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 messages on and off
Depending on vehicle equipment, you may be
able to switch the predictive messages on or off.
Applies to MMI: Select on the home screen: VE-
HICLE > Efficiency assist > Predictive messages.

Z\ WARNING
— Follow the safety precautions and note the
limits of the assist systems, sensors, and
cameras > page 114.
— 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.
(i) Tips
— 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.

125

Driver assistance

— 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.
Predictive control
Applies to: vehicles with Audi adaptive cruise control and effi-
ciency assist
With predictive control, efficiency assist adapts
the set speed in adaptive cruise control @
=> page 128 based on detected speed limits and
the upcoming route. Once the system no longer
detects any incidents ahead, adaptive cruise con-
trol will accelerate back up to the last speed that
the driver set. After switching on the ignition, the
availability of predictive control is indicated by a
message when the adaptive cruise control is first
activated.
The displays depend on the vehicle equipment.
Requirements
— Adaptive cruise control is actively regulating
=> page 129.
— The system can only react to speed limits that
are 15 mph (20 km/h)2) or higher.
Overriding control
The driver can override the predictive control to
the route ahead at any time by pressing the ac-
celerator or brake pedal. If the system changes
the vehicle speed to adapt to speed limits, you
can change the speed using the lever
=> page 129, fig. 116.
Setting predictive control
You can switch off predictive control functions or
adjust them individually. The settings depend on
the vehicle equipment.

D_ This is not available in some countries.
2) Analog instrument cluster: 20 mph (30 km/h)
126
Applies to: MMI: Select on the home screen: VE-
HICLE > Driver assistance > Audi adaptive cruise
control > Predictive control.
Possible settings:
Set speed limit - Adjusts to speed limits. You can
also set With tolerance if desired. In this scenar-
io, you may fall below or exceed the set speed in
favor of increased efficiency.
Adjustment to curves along route - Regulates
based on the route ahead, for example by con-
trolling the speed at which the vehicle drives
through curves.
Messages
Ife and a message with Predictive control is
displayed when there is a malfunction, the effi-
ciency 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 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.

ZX WARNING
— Follow the safety precautions and note the
limits of the assist systems, sensors, and
cameras > page 114.
— Pay attention to traffic and the area around
your vehicle when predictive control is
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

8W1012721BB
Driver assistance


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.

G) 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 @
= page 128 of the set speed limit will be ad-
justed even if Audi adaptive cruise control is
not actively regulating.
— Control by the system depends on which
adaptive cruise control 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
incorrect or the navigation system map data
is outdated.
— When route guidance is switched on, the
system adapts to the route provided by the
navigation system. Driving without route
guidance or leaving a route can result in
faulty control.

D_ In certain countries
Audi adaptive cruise
control
General information
Applies to: vehicles with Audi adaptive cruise control
Depending on vehicle equipment, Audi adaptive
cruise control may consist of the following func-
tions:
Within the limits of the system, the adaptive
speed
and distance control assists the driver in
controlling the speed and the set distance to the
vehicle driving ahead. If the system detects a ve-
hicle driving ahead, the adaptive cruise control
can brake and accelerate your vehicle within the
limits of the system. On open roads with no traf-
fic, it functions like a cruise control system. The
stored speed is maintained. When approaching a
vehicle driving ahead, the adaptive cruise control
system automatically brakes to match that vehi-
cle's speed and then maintains the set distance
as much as possible. As soon as the system does
not detect a vehicle driving ahead, adaptive
cruise control accelerates up to the stored speed.
In stop-and-go traffic, the vehicle may brake to a
full stop and then may also start driving again
automatically under certain conditions.
Applies to: vehicles with traffic jam assist: In
traffic jams or in stop-and-go traffic, the traffic
jam assist can assist the driver to stay within the
lane detected by the system > page 134.
Applies to: vehicles with efficiency assist: Predic-
tive control can adjust the set speed based on
traffic and road conditions > page 126.

ZA WARNING
Follow the safety precautions and note the
limits of the assist systems, sensors, and
cameras > page 114.
G) Tips
For an explanation on conformity with the
FCC regulations in the United States and the
Industry Canada regulations, see > page 275.

127

Driver assistance



Limitat

Applies to: vehicles with Audi adaptive cruise control

B8V-0630
Fig. 111 Example: vehicle changing lanes and stationary
vehicle
B4M-0093


Fig. 112 Example: driving into a curve
In some situations, the adaptive cruise control
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. 112 and out of
acurve, 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 115, fig. 104.
— When driving around tight curves, a vehicle
driving ahead that was previously detected may
no longer be detected, and the system may ac-
celerate 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.
128
— The system cannot react to stationary objects,
such as vehicles at the end of a traffic jam, es-
pecially when traveling at high speeds.
— The system has a limited ability to detect
vehicles that are a short distance ahead, off to
the side of your vehicle, or moving into your
lane.
— Objects that are difficult to detect, such as mo-
torcycles, vehicles with high ground clearance,
or vehicles with an overhanging load, may be
detected late or not detected at all.
— The system does not respond to people, ani-
mals, or objects that are crossing or approach-
ing from the opposite direction.

ZA\ WARNING
Follow the safety precautions and note the
limits of the assist systems, sensors, and
cameras > page 114.



Fig. 114 Instrument cluster: driver assistance display
Indicator lights and messages in the speedome-
ter inform you about the driving situation
and the settings. In the Driver assistance display
(4) - @, you can find more detailed information
abour the system. The displays depend on the
country and equipment.