2021 AUDI A4 light

Care and cleaning

— Never use steam cleaners, brushes, hard
sponges, etc. when cleaning.
— Do not turn on the seat heating” to dry
the seat.
— Objects with sharp edges, such as zippers
or rivets on clothing or belts, can cause
damage to the surface.
— Open hook and loop fasteners, for exam-
ple on clothing, can damage seat covers.
Make sure hook and loop fasteners are
closed.
— Natural leather
— Never treat leather with solvents, floor
polish, shoe polish, spot remover or simi-
lar products.
— Objects with sharp edges, such as zippers
or rivets on clothing or belts, can cause
damage to the surface.
— Never use steam cleaners, brushes, hard
sponges, etc. when cleaning.
— Do not turn on the seat heating* to dry
the seat.
—To help prevent the leather from fading,
do not leave the vehicle in direct sunlight
for long periods of time. If leaving the ve-
hicle parked for long periods of time, you
should cover the leather to protect it from
direct sunlight.
@) Tips
— Insects are easier to remove from paint that
has been freshly waxed.
— Regular waxing can prevent rust spots from
forming.
— Decorative decals can age due to environ-
mental conditions, which can result in dam-
age such as brittleness. The color may fade
if exposed to excessive sunlight.
Taking your vehicle out
of service
If you would like to take your vehicle out of serv-
ice for a long period of time, contact an author-
ized Audi dealer or authorized Audi Service Facili-
ty. You can receive information about the meas-
ures to take depending on the conditions for tak-
260
ing the vehicle out of service (duration, location,
etc.).

8W1012721BC
Emergency assistance

Emergency assistance
General information
> Park the vehicle as far as possible from moving
traffic in the event of a breakdown. In the event
of a flat tire, park the vehicle ona level surface.
If you are ona steep hill, be especially careful.
> Set the parking brake.
> Switch the emergency flashers on.
> Have the passengers exit the vehicle. They
should move to a safe place, for example be-
hind a guard rail.

Z\ WARNING
Follow the steps given above. This is for your
protection and the for the safety of others on
the road.

Equipment
Vehicle tool kit, tire mobility kit, and

vehicle jack
Applies to: vehicles with the vehicle tool kit, tire mobility kit,
and vehicle jack

Fig. 169 Luggage compartment: cargo floor cover
The vehicle tool kit, vehicle jack, tire mobility kit
and compressor are stored in the luggage com-
partment under the cargo floor cover.
> Applies to: sedan: To open the front compart-
ment, lift the cargo floor cover by the strap (@).
> Applies to: allroad: To open the front compart-
ment, pull the cargo floor cover by the plastic
handle @) slightly toward the rear. Lift the car-
go floor cover over the front compartment.
> To open the rear compartment, lift the cargo
floor cover by the plastic handle @).
> Applies to: sedan: Engage the plastic handle @)
in the luggage compartment seal.
> To remove the cargo floor cover completely,
pull it toward the rear at the plastic handle @).
> Applies to: vehicles with spare tire: Turn the
handle counter-clockwise and remove the spare
tire.
> Applies to: sedan: Unhook the cargo floor cover
again
before closing the luggage compartment
lid.
Depending on vehicle equipment, the vehicle tool
kit, tire mobility kit, and compressor may be lo-
cated under another cover that is secured with a
handwheel.
Applies to: vehicles with vehicle jack in the stor-
age bag: The bag with the vehicle jack is secured
to the tie-downs in the luggage compartment
and must be secured to the tie-downs again after
using it.

ZX WARNING
Applies to: vehicles with vehicle jack in the storage bag
A vehicle jack that is unsecured, incorrectly se-
cured, or not secured in the luggage compart-
ment may slide out of place when braking,
turning,
or in an accident, which increases the
risk of injuries to vehicle passengers. To re-
duce the risk of an accident, never transport
the vehicle jack without securing it.
G) Tips
—Insome vehicles, the rear compartment
may not open.
— The vehicle jack in your vehicle is mainte-
nance-free.

Tire mobility kit
Applies to: vehicles with tire mobility kit
> Read and follow the important safety precau-
tions > page 261.
> Set the parking brake.
> Select the “P” position.
> Check if a repair with the tire mobility kit is pos-
sible > page 262.
261

8W1012721BC
Emergency assistance

bracket on the jack @) completely covers the
notch on the vehicle.
> Align the vehicle jack so the bracket (@) covers
the notch and the base (2) is flat on the ground.
The base @) must be directly under the mount-
ing point @.
> Mount the crank on the vehicle jack: insert the
crank into the opening on the handwheel. Turn
the crank to the left or right to secure it.
> Continue raising the vehicle jack with the crank
until the wheel lifts off the ground slightly.


ZA WARNING
—To reduce the risk of injury, make sure no
one is in the vehicle before raising it.
— Make sure the vehicle jack is stable. The risk
of injury is increased when the ground is
slippery or soft, because the vehicle jack
could slide or sink.
— Only raise your vehicle with the vehicle jack
provided by the factory. If you use a vehicle
jack designed for another vehicle, your vehi-
cle could slip and cause injury.
— Position the vehicle jack only at the desig-
nated mounting points on the side sill and
align the jack. Otherwise, the vehicle jack
could slip and cause an injury if it does not
have sufficient hold on the vehicle.
—To reduce the risk of injury, do not raise any
other vehicles or other loads using the vehi-
cle jack provided by the factory.
— To reduce the risk of an accident, never start
the
engine when the vehicle is raised.
—To reduce the risk of injury, no work should
be performed under the vehicle while it is
raised.

() Note
Do not lift the vehicle by the sill. Position the
vehicle jack only at the designated mounting
points on the side sill. Otherwise, your vehicle
could be damaged.
Removing and installing a wheel
| B8K-1479

Fig. 178 Wheel: alignment pin in the top hole
Removing a wheel
> Remove the top wheel bolt completely using
the hex socket in the screwdriver handle from
the vehicle tool kit > fig. 177 and place it ona
clean surface.
> Then install the alignment pin from the vehicle
tool kit in the empty wheel bolt hole by hand
> fig. 178.
> Remove the rest of the wheel bolts.
>» Remove the wheel >(). The alignment pin re-
mains in the hole while doing this.
Installing a wheel
Read the directions on > page 266 when instal-
ling unidirectional tires.
> Slide the wheel on over the alignment pin >@.
> Install the wheel bolts and tighten them gently
using the hex socket.
> Remove the alignment pin and tighten the re-
maining wheel bolt.
> Carefully lower the vehicle using the vehicle
jack*.
> Tighten the wheel bolts in a diagonal pattern
using the wheel wrench*.
265

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
>

Fuses and bulbs

Fig. 182 Driver's side footwell (left-hand drive vehicles):
footrest (@), front passenger's footwell (right-hand drive
vehicles): cover

Zag
BBW-0257
Fig. 183 Driver's side cockpit (left-hand drive/right-hand
drive vehicles): cover ©, left side of luggage compartment:
cover ()
272

A fuse that has blown will have metal strips that
have burned through.
The fuses are located in the footwell under the
r behind foot rest (left-hand drive vehicle) @
the cover (right-hand drive vehicle)
fuses are located on the front side of the cockpit
(driver's side) © and under the left cover in the
luggage compartment (

> Switch the ignition and all electrical equipment
off.
> Check the table that follows to see which fuse
belongs to the equipment.
» Remove the screwdriver and the reversible Torx
bit from the vehicle tool kit > page 261.
> Remove the footrest or the corresponding cov-
er.
> Remove the colored plastic clip from the fuse
panel, if necessary > page 273, fig. 184.
> Remove the clip from the rear side of the cover
(©):
> Remove the fuse using the clip.
> Replace the blown fuse only with a fuse that
has the same amp rating.
> Reinstall the plastic bracket.
>» Reattach the footrest or the cover.
Fuse color identification








Color Current rating
in amps
Black 1
Purple 3
Light brown 5
Brown 7.5
Red 10
Blue 15
Yellow 20
White or transparent [25
Green 30
Orange 40
Z\ WARNING
Do not repair fuses and never replace a blown
fuse with one that has a higher amp rating.
This can cause damage to the electrical sys-
tem and increases the risk of fire.

8W1012721BC
Fuses and bulbs

@) Note
If a new fuse burns out again shortly after you
have installed it, have the electrical system
checked as soon as possible by an authorized
Audi dealer or authorized Audi Service Facili-
t y.
G@) Tips
— The following table does not list fuse loca-
tions that are not used.
— Some of the equipment listed in the follow-
ing tables applies only to certain model ver-
sions or certain optional equipment.

Fig. 184 Driver's footwell (left-hand drive vehicle): fuse
panel with plastic clip
3
=f
= & a

x
Ss $ 2 8

Fig. 185 Front passenger's footwell (right-hand drive vehi-
cle): fuse panel with plastic clip


f ) (brown)
No. | Equipment

1 | Catalytic converter heating

2 | Engine components

Exhaust doors, fuel injectors, radiator in-
let, crankcase housing heating

Vacuum pump, hot water pump, NOx sen-
4 |sor, particulate sensor, biodiesel sensor,
exhaust doors

Brake light sensor

6 | Engine valves, camshaft adjustment

Heated oxygen sensors, mass airflow sen-
sor, water pump

Water pump, high pressure pump, high
8 |pressure regulator valve, temperature
valve, engine mount

Hot water pump, motor relay, 48 V drive-
train generator, 48 V water pump

10 | Oil pressure sensor, oil temperature sensor

Clutch position sensor, 48 V drivetrain
11 |generator, water pump, 12 V drivetrain
generator

12 | Engine valves, engine mount


13 | Engine cooling

273

Fuses and bulbs






Fuse panel @) (brown) Fuse panel (© (black)
14 | Fuel injectors, engine control module 11 Left rear door control module, left rear
15 |Ignition coils, heated oxygen sensors power window
16 | Fuel pump 12 | Parking heater
Fuse panel (®) (red) Fuse panel (0) (black)
No. | Equipment No. | Equipment

Anti-theft alarm system

Front seat electronic, seat ventilation,
rearview mirror, rear climate control sys-

































tem control panel, windshield heating, di-
agnostic connection
2 Diagnostic interface, vehicle electrical sys-
tem control module
3 |Sound generator
4 |Clutch position sensor
5S |Engine start, emergency shut-off
6 Diagnostic connection, traffic information
antenna (TMC)
7 |USB input
8 |Garage door opener
9 Audi adaptive cruise control, distance reg-
ulation
11 | Front camera
12 | Right headlight
13 | Left headlight
14 | Transmission fluid cooling
Fuse panel (©) (red)
No. | Equipment
1 {Ignition coils
2 |Climate control system compressor
S |Left headlight
6 |Automatic transmission
7 |Instrument panel
8 | Climate control system blower
9 |Right headlight
10 | Dynamic steering
11 | Engine start



2 | Engine control module
3 Left front seat electronics, lumbar sup-
port, massaging seat
4 | Automatic transmission selector lever
5 |Horn
6 |Parking brake
7 | Diagnostic interface
8 | Roof electronics control module
9 |Emergency call module
10 | Airbag control module
11 Electronic Stabilization Control (ESC), An-
ti-Lock Braking System (ABS)
12 | Diagnostic connection, light/rain sensor
13 | Climate control system
14 | Right front door control module
15 | Climate control system compressor
16 | Brake system pressure reservoir
Fuse panel (©) (black)
No. | Equipment
Front seat heating
2 |Windshield wipers
Left headlight electronics
4 Panoramic glass roof / sliding/tilting sun-
roof
5 |Left front door control module
6 | Sockets
7 Right rear door control module, right rear
power window
All wheel drive control module
9 | Right headlight electronics
10 Windshield washer system/headlight

washer system control module

274

8W1012721BC
Fuses and bulbs

Fuse assignment - Driver's side of the
(ole 4o)ig

Fig. 186 Driver side cockpit: fuse panel with plastic bracket

Fuse panel

No. Equipment

B
Convenience access and start authoriza-
tion control module





Fuse assignment - Left side of the luggage
compartment
GU -

|_8aw-0013]




2 | Audi phone box, USB input
4 |Head-up display
5 |Audi music interface, USB input
6 | Front climate control system control panel eet ofihe uagage compartment: fuse panel
7 |Steering column lock
8 |Center display Fuse panel @) (black)
9 |Instrument cluster No. | Equipment
10 | Volume control 2 |Windshield defroster
11 | Light switch, switch module 3 |Windshield defroster
12 | Steering column electronics 5 |Suspension control
14 | Infotainment system 6 |Automatic transmission
16 Steering column electronics, steering 7 |Rear window defogger
wheel heating 8 |Rear seat heating
9 |Left tail lights

10 Airbag control module

ig
Luggage compartment lid lock, fuel filler
door lock, convenience system control
module

12 Luggage compartment lid

Fuse panel @) (red)

No. Equipment

Electric compressor

Fuse panel (©) (brown)
No. Equipment


Exterior antenna

275