2020 AUDI A4 ECU

8W1012721BB
Stowing and using

Partition net (upright backrest position)
Applies to: vehicles with partition net
B8W-0121
‘ 2

Fig. 82 Behind the backrest: hanging the partition net

B8W-0122


Fig. 83 Behind the backrest: removing the partition net
The partition net prevents objects from sliding
from the luggage compartment into the passen-
ger compartment.
Follow the safety precautions > page 79.
> To set up the partition net, pull it upward.
> Attach the crossbrace to the mounting eyelets
above the backrest > fig. 82.
> To remove the partition net, fold the backrest
forward .> page 82
> Press the left and right buttons on the partition
net and lift the net upward to remove it
> fig. 83.
> To install the partition net, fold the backrest
forward .> page 82
> Slide the left and right sides of the partition net
into the mount.
> Press the partition net down diagonally at the
left and right until it locks into place and the
red markings on the buttons are no longer visi-
ble.
Partition net (backrests folded forward)

Applies to: vehicles with partition net

B8W-0123

Fig. 84 Folded backrest: installing the partition net
. %
B8W-0124
Fig. 85 Folded backrest: hanging the partition net
The partition net prevents objects from sliding
from the luggage compartment into the passen-
ger compartment.
Follow the safety precautions > page 79.
> To install the partition net, fold the backrest
forward .> page 82
> Place the partition net on the recesses in the re-
taining rails @ and slide it all the way to the
left Q).
> To secure the partition net, pull it upward and
out and hook it into the mounting eyelets
above the front seats > fig. 85.
> To remove the partition net, first slide it to the
right and then lift it out of the retaining rails.
You must remove the partition net before
folding the backrest back into the upright po-
sition.
83

Stowing and using

ie-downs and luggage compartment net


Fig. 86 Luggage compartment: movable tie-downs


mere NNN
Fig. 87 Luggage compartment: cargo net stretched out
Follow the safety precautions > page 79.
Tie-downs
There are tie-downs in the luggage compartment
to secure pieces of luggage and objects.
> Use the tie-downs to secure the cargo.
Movable tie-downs
Applies to: vehicles with movable tie-downs
> To install a tie-down, press both buttons at the
sides ® insert the tie-down in the rail, and
lock it in place.
> To slide a tie-down, press both of buttons at
the sides and slide the tie-down to the desired
position. The tie-downs must lock in place.
> To remove a tie-down, press both buttons at
the sides and remove the tie-down from the
rail.
Cargo net
Applies to: vehicles with luggage compartment net
Use the cargo net (2) to secure lighter objects in
the luggage compartment
> Fold the clip for the tie-downs upward.
84

» Attach the hooks for the cargo net to the tie-
downs.

Pas: rough
Applies to: vehicles with pass-through
B8W-0197
Fig. 88 Backrest: pass-through release
Follow the safety precautions > page 79.
> To release the pass-through, turn the lock on
the backrest.
> Fold the pass-through cover down.

7 ) Tips

The pass-through can be locked and unlocked
from within the luggage compartment. This
prevents any access to the luggage compart-
ment from the vehicle interior.
att IT 9
Applies to: vehicles with a fixture set

Fig. 89 Luggage compartment: securing attachments
The telescoping rod @) and the securing strap (2)
help to prevent objects from sliding around in the
luggage compartment.
Follow the safety precautions > page 79.
> Insert the movable tie-downs > page 84.

8W1012721BB
Stowing and using

> Press the button (8) on the retainers and place
them on the tie-downs. Make sure the brackets
are locked into place.
> Slide the tie-downs into the desired position.
> Press the button to tighten the securing strap.
@ Tips
Store the movable tie-downs and the fixture
set in the openings under the front cargo
floor, if necessary.

2 q 3 5
s a
co

Fig. 90 Luggage compartment: cargo mat spread out
lengthwise
Fig. 91 Luggage compartment: (@) crosswise cargo mat /
@ lengthwise cargo mat



The cargo mat protects the luggage compart-
ment and bumper from dirt and scratches. You
can use both sides of the cargo mat.
Follow the safety precautions > page 79.
> To protect the luggage compartment and
bumper when loading and unloading objects,
lay the cargo mat out lengthwise with the
backrests folded down or upright > fig. 90.
> After loading or unloading, fold up the cargo
mat and close the luggage compartment lid.
> To also protect the side trim panels, lay the car-
go mat out widthwise.
> To divide the loading surfaces into separate sec-
tions > fig. 91, fold the cargo mat.
> Only store the cargo mat if it is dry.
You can save room by storing the cargo mat at
the sides of the luggage compartment.

q 8
&
= @ a

Fig. 92 Luggage compartment: cargo area floor
BEW-0128

(a
Fig. 93 Luggage compartment: cargo area floor reversed
You can transport dirty and damp objects in the
reversible cargo area floor.
8s
>

8W1012721BB
Warm and cold

Fluids in the A/C system
Refrigerant in the A/C system
The sticker in the engine compartment provides
information about the type and amount of refrig-
erant used in the vehicle’s A/C system. The stick-
er is located in the front section of the motor
compartment or at the front or back of the hood.

Symbol | Meaning

Warning: the A/C system must only
A be serviced by qualified technicians.

Refrigerant type

wht Lubricant type

Refer to the service information
(only available for authorized Audi
dealers or authorized Audi Service
Facilities)
ie

The A/C system must only be serv-
iced by qualified technicians.

Flammable refrigerant
Se
|Be

Make sure all components are dis-
posed of correctly and never install
y components in the vehicle that have
been removed from old vehicles or
taken from recycling.


Lubricant in the A/C system
The exact specification and amount of lubricant
in the A/C system can be obtained from an au-
thorized Audi dealer or authorized Audi Service
Facility or at https://erwin.audiusa.com/erwin.

ZA WARNING
To ensure secure and safe operation, the A/C
system must only be serviced by qualified
technicians.

G@) Tips
— Never repair the A/C system evaporator with
components from old vehicles or from recy-
cling.
— New replacement evaporators for portable
A/C systems must be certified and labeled
as such, so that they comply with the SAE
standard J2842 HFO-1234yf and R744.
91

8W1012721BB
Driving

reached operating temperature yet. You
could damage the engine.
— If the engine has been under heavy load for
an extended period of time, heat builds up
in the engine compartment after the engine
is switched off and there is a risk of damag-
ing the engine. For this reason, let the en-
gine run at idle for approximately two mi-
nutes before shutting it off.
@ Tips
— Brief noises are normal when starting and
stopping the vehicle and are no cause for
concern.
— For up to 10 minutes after stopping the en-
gine, the radiator fan may turn on again au-
tomatically or it may continue to run, even if
the ignition is switched off.
— It may not be possible to start the vehicle in
extremely low temperatures.
— Power will be fully available once the engine
is at operating temperature.
Messages
E Engine start system: malfunction! Please
contact Service
There is a malfunction in the engine start system.
Drive immediately to an authorized Audi dealer
or authorized Audi Service Facility to have the
malfunction repaired.
BB Remote control key: key not detected. Is the
key
still in the vehicle?
The vehicle key was removed from the vehicle
while the engine is running. If the vehicle key is
no longer in the vehicle, you cannot switch the ig-
nition on or start the engine once you stop it. You
also cannot lock the vehicle from the outside.
Remote control key: hold back of key
against the designated area. See owner's man-
ual
The battery in the vehicle key may be drained or
there may be a malfunction. To start the vehicle,
you must also hold the vehicle key against the lo-
cation shown ?) > page 92, fig. 98.
If the malfunction remains, drive immediately to
an authorized Audi dealer or authorized Audi
Service Facility to have the malfunction correct-
ed.
When driving

Starting to drive, stopping, and parking
Starting from a stop
>» Press and hold the brake pedal.
> Start the engine.
> Select a gear.
> Release the parking brake.
> Release the brake pedal. The vehicle may roll.
> Press the accelerator pedal to accelerate.
Stopping and parking
> Bring the vehicle to a full stop and press and
hold the brake pedal.
> Set the parking brake.
> Select the “P” selector lever position to secure
the vehicle from rolling away.
> Turn the steering wheel when parking on in-
clines so that the wheels will roll into the curb
if the vehicle starts moving.
> Switch off the ignition before leaving the vehi-
cle.
On hills, activate the parking brake first and then
shift into the "P" selector lever position. This pre-
vents too much stress from being placed on the
locking mechanism.

ZA\ WARNING
— Always set the parking brake when leaving
your vehicle, even if for a short period of
time. If the parking brake is not set, the ve-
hicle could roll away, increasing the risk of
an accident.
— Do not leave your vehicle unattended while
the engine is running, because this increases
the risk of an accident.
— If the parking brake is set, it can release au-
tomatically when the accelerator pedal is
pressed. To reduce the risk of an accident,
do not inadvertently press the accelerator
pedal and always shift into “P” when the ve-

hicle is stopped.

93

8W1012721BB
Driving

If you unintentionally select “N” while driving
(faster than 1 mph (2 km/h)), you can also shift
back to “D” without pressing the brake pedal.
For safety reasons, the vehicle cannot be locked
when the transmission is in the "N” gear.
“Pp” (Park) gear
Requirement: the ignition must be switched on.
The vehicle is secured from rolling away by the
parking lock when in the “P” gear.
— Bring the vehicle to a full stop and press the
brake pedal.
— Press the “P” button (2) on the selector lever.
— The “P” next to the selector lever will light up.
“P” engages automatically if you switch the en-
gine off while the “D” or “R” gear is selected. If
you switch the engine off in “N”, “P” will engage
automatically after approximately 30 minutes.
If you want to switch from “P” to “D” or “R”, the
engine must be running.
If you cannot shift out of “P”, for example be-
cause the vehicle has no power, you may need to
use the emergency release for the parking lock
=> page 97.
Selecting a driving program
Various driving programs can be selected when in
the “D” gear. The programs influence when the
transmission shifts and how the accelerator ped-
al responds.
The selected driving program is displayed in the
instrument cluster.
— D (Drive): normal driving mode
—S (Sport): sporty driving mode
If you select the Dynamic mode in Audi drive se-
lect*, the “S” driving program will be activated.
When the ignition is switched off, the driving pro-
gram may be reset to “D”.
To switch between the current driving program
and “S”, push the selector lever toward the rear.

ZX WARNING
— Before starting to drive, check if the desired
gear is displayed next to the selector lever.
— Always secure your vehicle from rolling
away. Press the brake pedal or shift to “P”.
When leaving the vehicle, also set the park-
ing brake.
— Power is still transmitted to the wheels
when the engine is running at idle. To pre-
vent the vehicle from “creeping”, you must
keep your foot on the brake in all selector
lever positions (except "P" and "N") when
the engine is running.
—To reduce the risk of an accident, do not
press the accelerator pedal when changing
gears if the vehicle is stationary and the en-
gine is running.
— Never select the “R" or "P” gears while driv-
ing. Doing so could cause an accident.
—The vehicle can roll even if the ignition is


switched off.

G) Tips
If you shift between “D” and “R” within one
second, you do not need to press the brake
pedal. This makes it possible to “rock” if it is
stuck, for example.
95

8W1012721BB

Driving


Manually releasing the parking lock
B8W-0047

B8W-0162

Fig. 103 Front cup holder: parking lock emergency release
The emergency release is located in the front cup
holder under a cover.
You will need the screwdriver and the socket
wrench from the vehicle tool kit in order to re-
lease > page 253. Use the flat side of the reversi-
ble screwdriver blade.
You need a narrow flat-head screwdriver to re-
lease.
Releasing the parking lock using the
emergency release
> Set the parking brake to secure your vehicle
from rolling away. If this is not possible, secure
your vehicle from rolling using another meth-
od.
> Remove the rubber mat.
> Pry the cover off the opening using the screw-
driver inserted in the slot.
> Insert the socket wrench from the vehicle tool
kit into the opening.
> Turn the socket wrench clockwise until it stops
@ and press it downward until it locks into
place @).
> Leave the socket wrench inserted.
Resetting the parking lock
> Press the brake pedal and start the engine.
> Keep the brake pedal pressed and engage the
following selector lever positions one after the
other: "N","D", and back to "N".
> Turn the engine off again.
> Grasp the socket wrench with both hands and
carefully pull it upward to remove.
> Reinsert the cover and rubber mat.

ZA\ WARNING
— The parking lock may only be released using
the emergency release if the parking brake
is set. If it is not working, secure the vehicle
from rolling using the brake pedal or other
suitable means, such as blocking a front and
a rear wheel. An unsecured vehicle may roll
away, which increases the risk of an acci-
dent.
— Only activate the emergency release while
ona level surface or a slight slope.
—To reduce the risk of an accident, you must
not drive when the emergency release is ac-
tivated.

@) Note
Due to the risk of damage, carefully remove
the socket wrench when you reset the parking
lock.
Messages
& Transmission: malfunction! Safely stop vehi-
cle
Do not continue driving. Stop the vehicle as soon
as possible in a safe location and secure it so it
does not roll. See an authorized Audi dealer or
authorized Audi Service Facility for assistance.
i Transmission: too hot. Please stop vehicle
Do not continue driving. Select "P" and contact an
authorized Audi dealer or authorized Audi Service
Facility for assistance.
fs] Transmission: too hot. Please adapt driving
style
97
>

Driving

@) Note
— Never let the brakes “rub” by pressing the
pedal lightly when braking is not actually
necessary. This can cause the brakes to over-
heat and increases braking distance and
causes wear.
— Observe the important information for driv-
ing downhill > page 104. This especially ap-
plies when towing a trailer.
@ Tips
— If you retrofit your vehicle with a front spoil-
er, wheel covers or similar items, make sure
that the air flow to the brakes is not ob-
structed. Otherwise the brake system can
overheat.
— Also refer to the information about brake
fluid > page 222.
WEEE Tel
GG 7 @ Brakes: malfunction! Safely stop ve-
hicle
There is a malfunction in the brake system. If
fs) and also turn on, there is a malfunc-
tion in the ABS, ESC, and braking distribution.
Do not continue driving. See an authorized Audi
dealer or authorized Audi Service Facility for as-
sistance. Read and follow the other safety pre-
cautions > A.
Gia / © Warning! No brake booster function
If the brake booster is not working, you have to
use much more force when braking the vehicle.
See an authorized Audi dealer or authorized Audi
Service Facility for assistance.
fia i 1] Brake pads: wear limit reached. You
can continue driving. Please contact Service
The brake pads are worn. Drive to an authorized
Audi dealer or authorized Audi Service Facility as
soon as possible to have the malfunction correct-
ed.
Brake booster: limited functionality.You can
continue driving. Please contact Service
102
There is a brake booster malfunction. The brake
booster is available, but its effectiveness is re-
duced. The braking performance may be different
compared to the usual performance. Drive to an
authorized Audi dealer or authorized Audi Service
Facility immediately to have the malfunction cor-
rected.
Brake booster: deactivated. See owner's manual
The brake booster remains active for a brief peri-
od of time after switching off the ignition. Secure
the vehicle from rolling by selecting “P” and set-
ting the parking brake.
Other indicator lights
When you switch the ignition on, the indicator
light EG if @® turns on briefly to check the
function. If the indicator light does not turn on,
there is a system malfunction.
iff / stays on, there is a malfunction in
the brake system.
@® - There was a heavy load on the brakes. Fol-
low the instructions in the message to utilize the
engine braking effect and to relieve the brakes.

ZA, WARNING
If a malfunction occurs in the ABS, ESC, and
braking distribution, interventions that stabi-
lize the vehicle will no longer be available.
This could cause the vehicle to swerve, which
increases the risk that the vehicle will slide.
Do not continue driving. See an authorized
Audi dealer or authorized Audi Service Facility
for assistance.

Electromechanical
parking brake
Operating the parking brake
The electromechanical parking brake is used to
secure the vehicle from rolling away unintention-
ally.
The ©) switch is located under the selector lever
in the center console. It turns on when the park-
ing brake is set. You can release the parking brake >