2021 AUDI A4 warning lights

8W1012721BC
Driver assistance

Audi active lane assist/
lane departure warning
General information
Applies to: vehicles with Audi active lane assist
The Audi active lane assist/lane departure warn-
ing (called only Audi active lane assist in the vehi-
cle displays and in the information that follows in
this Owner's Manual) can detect lane marker
lines within the limits of the system. If you are
approaching a detected lane marker and it ap-
pears likely that you will leave the lane, the sys-
tem can warn you with corrective steering anda
steering wheel vibration, if necessary.

Applies to: vehicles with Audi active lane assist

Fig. 118 Instrument cluster: driver assistance display
The system functions in the speed range of ap-
proximately 40 mph - 155 mph (65 km/h -
250 km/h).
Applies to: vehicles with Audi adaptive cruise control and traf-
fic jam assist
If the conditions are met, traffic jam assist
switches on at speeds under approximately
40 mph (65 km/h) > page 138.

Z\ WARNING
Observe the safety precautions and note the
limits of the assist systems, sensors, and
cameras > page 117.

Display and warning
The availability, readiness to provide warnings,
and the warnings are indicated with indicator
lights. Audi active lane assist is ready to provide
warnings if an object is detected on at least one
side of the lane where your vehicle is traveling.




Driver assistance Indicator lights Meaning
display Audi virtual | Instrument
cockpit cluster (analog)
@ White 71% 7% Audi active lane assist is activated, but is not
lines ready to provide warnings.
@ Green ex 7\ Audi active lane assist is activated and ready to
line(s) provide warnings.
@ Red 7X 7 \ Blinking Audi active lane assist will warn you with correc-
line tive steering before exiting the lane. If the system
must intervene for a long period of time, a mes-
sage will request the driver to drive in the center
of the lane. The steering wheel will also vibrate
lightly when exiting the lane.

If the system is switched on but is not ready to
provide warnings, one of the following systems
limits or situations could be the cause:
— The necessary lane marker lines have not been
detected (for example, in a construction zone
or because the lines are obstructed by snow,
dirt, water, or lighting)
— The speed is below the activation speed
— The lane is too narrow or too wide
— The curve is too narrow
— The driver's hands are not on the steering
wheel
— Visibility is obstructed by a rise or dip.
141

Audi connect

Information about the services and the corre-
sponding app was accurate at the time this man-
ual was printed. The scope of services depends
on the country and equipment. There may be
changes over the service life of the vehicle.

ZA WARNING
— Always follow the information found in > AA
in General information on page 173.
— Driver messages, text messages, and illumi-
nated warning and indicator lights in the ve-
hicle always take priority over information
from the Audi connect services. The infor-
mation displayed by the Audi connect serv-
ices should not cause you to take safety
risks. This can result in the vehicle breaking
down in traffic and to serious injuries or ac-
cidents.
G) Tips
— Accessing specific data or controlling func-
tions remotely depends on the charge level
of the vehicle battery. Therefore, these
functions only have limited availability after
switching off the ignition.

— An eSIM card establishes the Internet con-
nection for Audi connect vehicle control
services. The costs for this are included in
the price of Audi connect vehicle control
services. The cell phone network, for exam-
ple, must be available to use these services.
Applies to: vehicles with Audi connect vehicle control
Create a myAudi account by registering in the
myAudi app or at my.audi.com, depending on
your country.
>» Set the key user > page 30.
> Install the myAudi app on your mobile device
and log in with your access information.
@ Tips
Some services require you to enter a 4-digit
PIN that you set up during registration.
176
Settings
Applies to: vehicles with Wi-Fi hotspot
Requirement: the ignition must be switched on.
> Applies to: MMI: Select on the home screen:
SETTINGS > Connection settings > Wi-Fi
Depending on the country and the vehicle equip-
ment, the following functions may be available:
Wi-Fi
When the function is switched on, the MMI's Wi-
Fi hotspot is active and Wi-Fi devices can be con-
nected to the hotspot.
Wi-Fi hotspot settings
The Wi-Fi connection between the MMI and your
Wi-Fi device is encrypted. You can change the fol-
lowing information if needed.
— Access point (SSID): name of the Wi-Fi hot-
spot.
— Password: an initial password was set at the
factory in the MMI. Audi recommends changing
the initial password. Only use secure passwords
that conform to the general guidelines for se-
cure passwords. For more information, refer to
reputable and current sources on password se-
curity.
Allow data connection through Wi-Fi
When the function is switched on, mobile devices
can use the Internet connection through the Wi-
Fi hotspot. A data plan is needed to do this.

ZA\ WARNING
Always follow the information found in > A\
in General information on page 173.
@) Note
Always follow the information found in >@ in
General information on page 173.

8W1012721BC
Wheels

Your vehicle has also been equipped with a TPMS
malfunction indicator to indicate when the sys-
tem is not operating properly. The TPMS mal-
function indicator is combined with the low tire
pressure telltale. When the system detects a
malfunction, the telltale will flash for approxi-
mately one minute and then remain continuously
illuminated. This sequence will continue upon
subsequent vehicle start-ups as long as the mal-
function exists.
When the malfunction indicator is illuminated,
the system may not be able to detect or signal
low tire pressure as intended. TPMS malfunctions
may occur for a variety of reasons, including the
installation of replacement or alternate tires or
wheels on the vehicle that prevent the TPMS
from functioning properly. Always check the
TPMS malfunction telltale after replacing one or
more tires or wheels on your vehicle to ensure
that the replacement or alternate tires and
wheels allow the TPMS to continue to function
properly.
If the tire pressure monitoring indicator
appears
Applies to: vehicles with Tire Pressure Monitoring System in-
dicator
The tire pressure indicator in the instrument
cluster informs you if the tire pressure is too low
or if there is a system malfunction.
Using the ABS sensors, the tire pressure monitor-
ing system compares the tire tread circumference
and vibration characteristics of the individual
tires. If the pressure changes in one or more
tires, this is indicated in the instrument cluster
display with an indicator light @ and a message.
If only one tire is affected, the location of that
tire will be indicated.
The tire pressures must be stored again each
time you change the pressures (switching be-
tween partial and full load pressure) or after
changing or replacing a tire on your vehicle
=> page 254. The tire pressure monitoring system
only monitors the tire pressure you have stored.
Refer to the tire pressure label for the recom-
mended tire pressure for your vehicle
= page 245, fig. 168.
Tire tread circumference and vibration character-
istics can change and cause a tire pressure warn-
ing if:
— The tire pressure in one or more tires is too low
— The tires have structural damage
— The tire was replaced or the tire pressure was
changed and it was not stored > page 254
— Tires that are only partially used are replaced
with new tires
Indicator lights
If the @ indicator light turns on, there is a loss
of pressure in at least one tire .> A\ Check the
tires and replace or repair if necessary. Check and
correct the pressures of all four tires and store
the pressure again > page 254.
ia Tire pressure: malfunction! See owner's
manual
fi appears after switching the ignition on or
while driving and the @ indicator light in the in-
strument cluster blinks for approximately one
minute and then stays on, there is system mal-
function. Try to store the correct tire pressures
=> page 254. In some cases, you must drive for
several minutes after storing the pressures until
the indicator light turns off. If the indicator light
does turn off or turns on again after a short peri-
od of time, drive to an authorized Audi dealer or
authorized Audi Service Facility immediately to
have the malfunction corrected.

ZA WARNING
— If the tire pressure indicator appears in the
display, reduce your speed immediately and
avoid any hard steering or braking maneu-
vers. Stop as soon as possible and check the
tires and their pressure.
— The driver is responsible for maintaining the
correct tire pressure. You must check the
tire pressure regularly.
— Under certain conditions (such as a sporty
driving style, winter conditions, or unpaved
roads), the tire pressure monitoring system
indicator may be delayed.

253

Care and cleaning




Water-based deposits
such as coffee, tea,
blood, etc.
Component Situation Solution
Displays/instru- | Deposits Soft cloth with LCD cleaner; dust in the lower area of the
ment cluster instrument cluster can be removed using a soft brush.
Controls Deposits Soft brush, then a soft cloth with a mild soap solution®
Safety belts Deposits Mild soap solution ®, allow to dry before letting them re-
tract
Textiles, Deposits adhering to | Vacuum cleaner
artificial leather, |the surface
Alcantara Absorbent cloth and mild soap solution®

Oil-based deposits
such as oil, make-up,
etc:
Apply a mild soap solution ®), blot away the dissolved oil or
dye, treat afterward with water, if necessary

Certain types of de-
posits such as ink,
nail polish, latex
paint, shoe polish,
etc.
Special stain remover, blot with absorbent material, treat
afterward with mild soap solution, if necessary®

Natural leather Fresh stains Cotton cloth with a mild soap solution®

Water-based deposits
such as coffee, tea,
blood, etc.
Fresh stains: absorbent cloth
dried stains: stain remover suitable for leather

Oil-based deposits
such as oil, make-up,
etc.
Fresh stains: absorbent cloth and stain remover suitable
for leather
dried stains: oil cleaning spray

Certain types of de-
posits such as ink,
nail polish, latex
paint, shoe polish,
etc.
Spot remover suitable for leather


nents

Care Regularly apply conditioning cream that protects from
light and penetrates into the material. Use special colored
conditioning cream, if necessary.
Carbon compo- Deposits Clean the same way as plastic components

@) Mild soap solution: maximum two tablespoons of neutral soap in 1 quart (1 liter) of water

Z\ WARNING

The windshield must not be treated with wa-
ter-repelling windshield coating agents. Un-
der
unfavorable conditions, such as wetness,
darkness, and when the sun is low, these coat-
ings can cause increased glare, which increas-
es the risk of an accident. They can also cause
wiper blade chatter.

() Note
— Headlights and tail lights

258

8W1012721BC
Emergency assistance

Connecting the positive cable (red) to the
positive terminal
> Open the cover on the positive terminal
> fig. 179.
1. Attach one end of the positive cable (red) to
the jump-start pin @ © fig. 180 on your vehi-
cle.
2. Attach the other end of the positive cable
(red) to the positive terminal @ on the pow-
er source.
Connecting the negative cable (black) to the
negative terminal
3. Attach one end of the negative cable (black)
to the negative terminal @) on the power
source.
4. Attach the other end of the negative cable
(black) to the jump-start pin @) on the vehi-
cle.
Starting the engine
>» Start the engine in the vehicle giving the charge
and let it run at idle.
> Now start the engine in your vehicle, which has
the
drained battery.
> If the engine does not start, stop the starting
procedure after 10 seconds and then repeat it
after approximately 30 seconds.
> Turn on the rear window defogger in your vehi-
cle in order to reduce any voltage peaks that
may occur when disconnecting the jump start
cables. The headlights must be switched off.
> With the engines running, remove the cables in
reverse order of the way they were installed.
> Close the cover on the positive terminal.

ZA WARNING
— Never connect the jump start cable directly
to your vehicle battery. Only use the connec-
tions in the engine compartment.
— Do not touch the non-insulated parts of the
terminal clamps. The cable must also not
come into contact with vehicle components
that conduct electricity when it is connected
to the positive vehicle battery terminal. This
can cause a short circuit.
— The plugs on the battery cells must not be
opened.

— Keep ignition sources (such as open flames,
burning cigarettes, etc.) away from the vehi-
cle batteries to reduce the risk of an explo-
sion.
— Route the jump start cables so they cannot
get caught in the moving parts in the other


vehicle's engine compartment.
() Note
Please note that the connecting process previ-
ously described for the jump start cables is in-
tended for when your vehicle is being jump
started.
G) Tips
Make sure that the connected jump start ca-
bles have sufficient contact with metal.

Towing
General information
You should only perform the steps that follow if
you have the necessary tools and technical ex-
pertise.
Towing requires a certain amount of practice.
Audi recommends contacting a towing company
to have the vehicle transported.
You should only have your vehicle towed by an-
other vehicle when disabled in exceptional cir-
cumstances. Inexperienced drivers should not
tow.
Notes on towing
When the engine is stopped, the transmission
will not be sufficiently lubricated if traveling at
high speeds and long distances:
— The maximum permitted towing speed is 30
mph (50 km/h).
— The maximum permitted towing distance is 30
miles (50 km).
Additional information on towing with a tow
truck
The vehicle may only be towed with the front axle
raised. Do not wrap any chains or cables around
the brake lines.
269
>

Index

Closing
Automatic luggage compartment lid...... 41
Convenience closing...........00.++00% 46
HOOP «a asaces Luggage compartment lid............... 41
Luggage compartment lid with foot motion . 42
Panoramic glass'roOf ici «+ eaves ew wrens oo a 47
Sliding/tilting sunroof................-. 46
Sufishadé (OOF): « + eww = x sates ¢ oem ze se 47
Wind OwS:. « sess «save oo ance 2 0 weuew sw vee 45
Cockpit diMMING:: « & excuse cers so eens ees 55
Cockpit (GVEMIEW)'s + saws 2 2 eam ae wows 2c ce 6
Collapsible spare tire.................0- 267
Collapsible tire
refer to Collapsible spare tire........... 267
Color cOd@ Compact spare tire. ........... sce e eee 266
Compartments...........0.0 eee eee eee 83
Compass inthe mirror............-0 0-0 ee 61
Compliance ..... 0.0... cee eee eee eee 284
Conference call......... eee eee eee eee 168
Configuration wizard « « sce 26 wicca a wena o 19
CONNEC son 2 & ieee 2 wares o were oo sR we oe L73
Data plans... 0... eee eee eee ee 177
Data Privacy..............2..0..0200. 279
Eme@ngericy'Calll ws a » aaa a & ons 2 9 rey 178
Infotainment............... 2.0 e ee eee 173
Infotainment services............00005 174
Online roadside assistance............. 179
Vehicle control services................ 175
Connected devices
Device overvieW.......... 00 eee eee eee 214
Connections
referto Media................--- 201, 203
Consumer information.................- 281
Consumption
Re@dUCING secs << sees = = wows sp eee sp ee 102
Consumption (fuel) .................000. 16
Contacts
IMPOFUNG ces s news 3 x woRG 5 5 aeEE Tae 170
Updating inthe MMI.................. 170
also refer to Directory...............-. 167
Convenience key...............00 000s eee 33
Convenience closing...........-...+6.: 46
also refer to Vehicle key..............-. 37
Convenience opening and closing
Windows or panoramic glass roof........ 46
290
Coolant temperature display.............. 14
Cooling system
Adding
coolant..............2--0000- 228
Checking the coolant level............. 228
GOOlANE
« sess oo soem oo memes © a ieenen @ DesemN 227
Cornering
lighticcs : gees s see es Senge 2 wes 51
Cruise control system..............00-5 127
CUB ROIGETS secs 5 eas « Basen Gs Hates ee BEG 82
Current consumption..............000005 16
D
Data module
Serial number (IMED) «swiss eae as rene 170
Data Plans = sees ss sees sine sarees bees 177
Data Privacy... .... cece cee ee eee eee 279
Date... eee eee 16
SEUting:< = = seme ¢ = see Fe ewes Fe ee Ee we 212
Daytime running lights.................. 51
Declaration of compliance............... 284
DEF (instrument cluster)..............005 12
Demo mode
refer to Presentation mode............. 191
Destination onthe map...............0. 184
Details... 6.0... ieee eee eee eee 184
Determining correct load limit........... 249
Digital GOMpass)s: sevsia + 0 woicssue se anesene 6 coven ws 61
DIMENSIONS ie. © & sss 2 w mens © w seen we AMR 286
Dimming the exterior mirrors............. 56
Dimming the rearview mirror............. 56
DIRECtO RY asus 5 2 wees 5s eee 5 3 ee Ey ERE 167
BUSIMESSICATG iam a wasn a 6 anesens « @ asanim www 168
Settings.......... 20.0.0 e eee eee eee 170
Display
Cleaning ....... 6... cece eee eee eee 258
Displaying tooltips..................00. 19
Disposal. ... 2.0.0... cee eee eee eee ee 281
DIStANGE cecriie is « coemmes ox mevece x somnwse ow omevere & 16
Distance’ Warning « sesisies + s acs w o enone & eeewens 140
Doors
Child safety lock............. 00... eee 44
DOOr COMEACESWITCH): « s waas s 6 eae s jaan a 3 54
Mechanically unlocking and locking....... 36
Driver information system................ L3
Drives
Feferto Med ideas se exw ae eevee 6 owe 201, 203