check engine AUDI A5 2020 Owner's Manual

Checking and Filling

— Only refill with new coolant.
— Radiator sealant must not be mixed with
the coolant.
— Due to the risk of engine damage, the cool-
ing system should only be refilled by an au-
thorized Audi dealer or authorized Audi
Service Facility. An authorized Audi dealer or
authorized Audi Service Facility can also pro-
vide you with important information about
the recommended coolant additive.
(@itsta diate maetel c-)

RAZ-0540|


MIN

Fig. 169 Engine compartment - coolant expansion tank: @)
cover; @) markings
Follow the safety precautions > page 221, Gener-
al information.
Checking the coolant level
> Park the vehicle on a level surface.
> Switch the ignition off.
> Open the hood > page 222.
The coolant expansion tank for some engines is
located in the water drip tray under a cover. If
necessary, remove the cover that is located under
the windshield wiper on the front passenger's
side.
> Check the coolant level in the coolant expan-
sion tank > page 223, fig. 167 using the outer
markings (2) > fig. 169. The coolant level must
be between the markings (2) when the engine is
cold. When the engine is warm it can be slight-
ly above the upper marking.
> Applies to: vehicles with 6-cylinder engine:
There is a float located in the coolant expansion
tank. Read the coolant level using the coolant
level float. When the engine is cold, the float
must be located between the MIN marking and
228
the edge of the filler opening on the coolant ex-
pansion tank.
Adding coolant
Requirement: there must be a residual amount of
coolant in the expansion tank >(@).
If you must add coolant, use a mixture of water
and coolant additive. Mixing the coolant additive
with distilled water is recommended.
> Allow the engine to cool.
> Place a large, thick towel on the coolant expan-
sion tank cap.
> Push the release button @ > fig. 169 on the
cap and carefully turn it to the left until you
feel resistance > /\.
> Push the release button again and remove the
cap completely.
> Add coolant in the correct mixture ratio
= page 227 up to the MAX marking. Or, in
vehicles with a 6-cylinder gasoline engine, the
float must be located between the MIN mark-
ing and the edge of the filler opening on the
coolant expansion tank.
>» Make sure that the fluid level remains stable.
Add more coolant if necessary.
> Vehicles with 6-cylinder engine: if necessary,
press the float into the coolant expansion tank
using the cover.
> Turn the cap to the right to tighten it until you
feel resistance a second time.
Coolant loss usually indicates that there is a leak.
Immediately drive your vehicle to an authorized
Audi dealer or authorized Audi Service Facility
and have the cooling system inspected. If the
cooling system is not leaking, coolant loss can re-
sult from the coolant boiling due overheating
and then being forced out of the cooling system.

ZA\ WARNING
— The engine compartment in any vehicle can
be a dangerous area. Stop the engine and al-
low it to cool before working in the engine
compartment. Always follow the informa-
tion found in > page 221, General informa-
tion.
— Never open the hood if you can see or hear
steam or coolant escaping from the engine >

8W7012721BA
Checking and Filling


compartment. This increases the risk of
burns. The cooling system is under pressure.
When you no longer see or hear steam or
coolant escaping, you may open the engine
compartment with caution.
— When working in the engine compartment,
remember that the radiator fan can switch
on even if the ignition is switched off, which
increases the risk of injury.
— Coolant additive and coolant can be danger-
ous to your health. For this reason, store the
coolant in the original container and away
from children. There is a risk of poisoning.


@ Note
Do not continue driving if the coolant expan-
sion tank is empty. Do not add any coolant,
because air could enter the cooling system
and damage the engine. See an authorized
Audi dealer or authorized Audi Service Facility
for assistance.
Brake fluid

BFV-0229)


Fig. 170 Engine compartment: cap on brake fluid reservoir
Follow the safety precautions > page 221, Gener-
al information.
Checking the brake fluid level
Read the brake fluid level on the brake fluid res-
ervoir > page 223, fig. 167. The brake fluid level
must be between the MIN and MAX markings
>A.
The brake fluid level is monitored automatically.
Message
GG / oo Brakes: stop vehicle and check brake
fluid level
Stop the vehicle and check the brake fluid level.
See an authorized Audi dealer or authorized Audi
Service Facility for assistance.
Changing the brake fluid
Brake fluid should be changed at regular inter-
vals. Have the brake fluid changed by an author-
ized Audi dealer or authorized Audi Service Facili-
ty. The authorized Audi dealer or authorized Audi
Service Facility will inform you of the replace-
ment intervals.

Z\ WARNING
— If the brake fluid level is below the MIN
marking, it can impair the braking effect and
driving safety, which increase the risk of an
accident. Do not continue driving. See an au-
thorized Audi dealer or authorized Audi
Service Facility for assistance.
— If the brake fluid is old, bubbles may form in
the brake system during heavy braking. This
could impair braking performance and driv-
ing safety, which increases the risk of an ac-
cident.
— The brake fluid in your vehicle must meet
the standard VW 501 14 and is available at
an authorized Audi dealer or authorized
Audi Service Facility. If this brake fluid is not
available, another high-grade brake fluid of
equivalent quality may be used, and it must
meet the U.S. Federal Motor Vehicle Stand-
ard (FMVSS) 116 DOT 4, Class 6.
@) Note
— If the brake fluid level is above the MAX
marking, brake fluid may leak out over the
edge of the reservoir and result in damage
to the vehicle.


— Do not allow any brake fluid to come into
contact with the vehicle paint, because it
will corrode the paint.
Electrical system
If the =] or fm] indicator light turns on, there is a
malfunction in the generator, the battery, or the
vehicle electrical system. >
229

Checking and Filling

= Electrical system: malfunction! Safely stop
vehicle
Do not continue driving and switch the engine off
=> AX. See an authorized Audi dealer or authorized
Audi Service Facility for assistance.
= Electrical system: malfunction! Restart not
possible. Please contact Service
If you switch the ignition off, you will not be able
to restart the vehicle. Vehicle functions/driving
stability may be limited. Drive to an authorized
Audi dealer or authorized Audi Service Facility im-
mediately.
= Electrical system: malfunction! Please con-
tact Service
Switch off all electrical equipment that is not
needed. Vehicle functions/driving stability may
be limited. Drive to an authorized Audi dealer or
authorized Audi Service Facility immediately.
= Electrical system: low battery charge. Bat-
tery will be charged while driving
The starting ability may be impaired.
If this message turns off after a little while, the
vehicle battery has charged enough while driving.
If this message does not turn off, drive immedi-
ately to an authorized Audi dealer or authorized
Audi Service Facility.

Z\ WARNING
When there is an electrical system malfunc-
tion, vehicle functions may not work and driv-
ing stability may be limited, which increases
the risk of an accident. Stop driving and
switch the engine off. See an authorized Audi
dealer or authorized Audi Service Facility for
assistance.


Battery
Battery general information
Because of the complex power supply, all work on
batteries such as disconnecting, replacing, etc.,
should only be performed by an authorized Audi
dealer or authorized Audi Service Facility > A\.
230
Multiple batteries with different technologies
may be installed in your vehicle:
— Vehicle battery (for example, for starting the
engine, basic power supply) > page 231, Lead
battery or > page 231, Other battery types
— Auxiliary battery (for example, for recuperation
or optional equipment) > page 231, Other bat-
tery types
Not running the vehicle for long periods of
time
The battery will gradually drain if the vehicle
does not run for long periods of time. To ensure
that the vehicle can still be started, the electrical
equipment will be reduced or switched off
= page 107. Some convenience functions, such
as interior lighting or power seat adjustment,
may not be available under certain circumstan-
ces. These convenience functions will be available
again once you switch the ignition on and start
the
engine.
Even when electrical equipment is switched off,
the equipment can still drain the battery if the
vehicle is not driven for long periods of time.
Deep draining results in a chemical reaction that
destroys the inside of the battery. The battery
must be charged every month to prevent this
= page 232. Contact an authorized Audi dealer or
authorized Audi Service Facility for more infor-
mation.
Winter operation
Cold weather places higher demands on the bat-
tery. This results in reduced starting ability. Have
the battery checked by an authorized Audi dealer
or authorized Audi Service Facility before cold
weather begins.

ZA WARNING
— All work on the battery or electrical system
in your vehicle can result in injuries, chemi-
cal burns, accidents, or burns. Because of
this, all work must be performed only by an
authorized Audi dealer or authorized Audi
Service Facility.
— Never connect the charging cable or jump
start cable directly to your vehicle battery. >

8W7012721BA
Checking and Filling


Only use the connections in the engine com-
partment > page 232.

ZA WARNING
California Proposition 65 Warning:
— Battery posts, terminals and related acces-
sories contain lead and lead compounds,
chemicals known to the State of California
to cause cancer and reproductive harms.
Wash hands after handling.
@) Note
— If the vehicle will be parked for long periods
of time, protect the battery against the cold
so that it will not be destroyed by “freezing”
= page 232, Charging the battery.
— There are electrical components under the
cargo floor behind a trim panel that warm
up during operation. To reduce the risk of
the components overheating, do not store
objects such as blankets under the cargo
floor. If the components overheat, they will
switch off temporarily. This will be indicated
by a message that will be displayed in the
instrument cluster until the temperature re-
turns to normal.
Lead battery
Explanation of warnings:


Always wear eye protection.

Battery acid is highly corrosive. Always
wear protective gloves and eye protection.

Fire, sparks, open flame, and smoking are
forbidden.

A highly explosive mixture of gases can
form when charging batteries.

Always keep children away from battery
acid and the battery.

Always follow the instructions in the oper-
ating manual.

5e@®
>
@—
O


() For the sake of the environment
“= ¥% Lead-acid batteries must be disposed of
using methods that will not harm the environ-
ment. Do not dispose of them in household
trash. They contain harmful substances, such
as sulfuric acid and lead, and also recyclable
raw materials. Contact an authorized Audi
dealer or authorized Audi Service Facility for
more information.
Cold altaya ay 1)
Explanation of warnings:

Fire, sparks, open flame, and smoking are
& forbidden.
Always keep children away from battery
4) acid and the battery.


@/ | Always follow the instructions in the oper-
CQ | ating manual.


Z\ WARNING
All work on the batteries must only be per-
formed by an authorized Audi dealer or au-
thorized Audi Service Facility.
— Gases that escape from these different bat-
tery types can be poisonous or flammable.
— The contents of these battery types can be
corrosive. If any battery contents come into
contact with the skin, flush the affected
area for at least 15 minutes with clean wa-
ter. Then wash the affected area with soap.
Have the affected area examined by a medi-
cal professional.
CG) Note
Components must not be connected to the
battery terminals and wires on these battery
types because this increases the risk of dam-
age, for example due to overvoltage.

@) For the sake of the environment
XE These types of batteries must be dis-
posed of using methods that will not harm
the environment. Do not dispose of them in
household trash. They contain harmful sub-
stances and recyclable raw materials. Contact
an authorized Audi dealer or authorized Audi
Service Facility for more information.

231

Checking and Filling

Charging the battery

Fig. 171 Engine compartment: connectors for a charger or
jump start cables
Note the safety precautions > page 221, General
information, > /\ in Battery general informa-
tion on page 230 and > /\.
Requirement: only use chargers with a maximum
charging current of 14.8 volts. The battery ca-
bles remain connected.
The battery is located in the engine compart-
ment. The ground point ©) is always located on
the vehicle body.
> Switch off the ignition and all electrical equip-
ment.
> Open the hood > page 222.
> Press the release lever on the positive terminal
and fold the cover upward > fig. 171.
> Clamp the charger terminal clamps to the jump
start pins according to the instructions. (Pin un-
der the cover = “positive”).
> Insert the power cable for the charging device
into the socket and switch the device on.
> At the end of the charging process, switch the
charger off and pull the power cable out of the
socket.
> Remove the charging device terminal clamps.
> Close the cover on the positive terminal.
> Close the hood > page 222.

Z\ WARNING
— Never connect the charging cable directly to
your vehicle battery. Only use the connec-
tions in the engine compartment
=> page 232.

232

— A highly explosive mixture of gases can form
when charging batteries. Only charge the
battery in well-ventilated areas.
— A drained battery can freeze at tempera-
tures around 32 °F (0 °C). Do not charge or
use a frozen or thawed battery. If ice forms,
the battery housing can crack and battery
electrolyte can leak out, which increases the
risk of an explosion and chemical burns.
Contact an authorized Audi dealer or author-
ized Audi Service Facility for more informa-
tion.
— Do not connect or disconnect the charging
cable while charging because this increases
the risk of an explosion.

G) Tips
Read all of the manufacturer's instructions
for the charger before charging the battery.
Windshield washer
system

B8W-0125



Fig. 172 Engine compartment: washer fluid reservoir cap
Follow the safety precautions > page 221, Gener-
al information.
The windshield washer fluid reservoir © contains
the cleaning solution for the windshield and the
headlight washer system > fig. 172, > page 223.
The reservoir capacity can be found in
=> page 284.
To reduce the risk of lime scale deposits on the
spray nozzles, use clean water with low amounts
of calcium. Always add window cleaner to the wa-
ter. When the outside temperatures are cold, an
anti-freezing agent should be added to the water
so that it does not freeze.

8W7012721BA
Checking and Filling

Messages
g Please add washer fluid
Fill the washer fluid for the windshield washer
system and the headlight washer system* when
the ignition is switched off.
@ Note
— The concentration of anti-freezing agent
must be adjusted to the vehicle operating
conditions and the climate. A concentration
that is too high can lead to vehicle damage.
— Never add radiator anti-freeze or other addi-
tives to the washer fluid.
— Do not use a glass cleaner that contains
paint solvents, because this could damage
the paint.
Service interval display
The service interval display detects when your ve-
hicle is due for service.
The service interval display works in two stages:
— Inspection or oil change reminder: after driv-
ing a certain distance, a message appears in the
instrument cluster display each time the igni-
tion is switched on or off. The remaining dis-
tance or time is displayed briefly.
— Inspection or oil change due: if your vehicle
has reached an inspection or oil change interval
or both intervals at the same time, the mes-
sage Inspection due! or Oil change due! or Oil
change and inspection due! will appear briefly
after switching the ignition on or off.
Checking service intervals
You can check the remaining distance or time un-
til the next oil change or next inspection in the
Infotainment system.
Select on the home screen: VEHICLE > Settings
& Service > Service intervals.
Resetting the indicator
An authorized Audi dealer or authorized Audi
Service Facility will reset the service interval dis-
play after performing service.
If you have changed the oil yourself, you must re-
set the oil change interval.
Select on the home screen: VEHICLE > Settings
& Service > Service intervals > Reset oil change
interval.
@) Note
— Only reset the oil change indicator if the oil
was changed.
— Following the service intervals is critical to
maintaining the service life and value of
your vehicle, especially the engine. Even if
the mileage on the vehicle is low, do not ex-
ceed the time for the next service.
233

Emergency assistance


— Normal summer or winter tires must not be

mounted on the compact spare wheel rim.

@) Note
Secure the space-saving spare tire in the spare
tire well using the handwheel in order to re-
duce the risk of damage to other components.
Jump starting
You should only perform the steps that follow if
you have the necessary tools and technical ex-
pertise.
If the engine does not start because the vehicle
battery is drained, you can jump start your vehi-
cle using another vehicle. Jump start cables are
needed to do this.
Both vehicle batteries must have 12 V nominal
voltage. The voltage capacity (Ah) of the vehicle
battery that is giving power must not be less
than the capacity of the drained vehicle battery.
Jump start cable
Only use a jump start cable with a large enough
diameter. Note the manufacturer's specifica-
tions.
Only use a jump start cable with insulated termi-
nal clamps.
Positive cable - usually red.
Negative cable - usually black.

Z\ WARNING
— A drained battery can freeze at tempera-
tures around 32 °F (0 °C). If the vehicle bat-
tery is frozen, it must be thawed before con-
necting the jump start cables. If it is not,
the risk of an explosion and chemical burns
increases. After jump starting the vehicle,
drive to an authorized Audi dealer or author-
ized Audi Service Facility immediately to
have the vehicle battery checked.
— Read the warnings when working in the en-
gine compartment > page 221.

266
— Handling the jump start cables incorrectly
may cause the vehicle battery to explode
and lead to serious injuries.
C) Note
Jump start cables can cause considerable
damage to the vehicle electrical system if
they are connected incorrectly.
G) Tips
— There must be no contact between the
vehicles, or else voltage could flow when
connecting the positive terminal and drain
the vehicle battery of the vehicle providing
the jump start.
— The drained vehicle battery must be con-
nected correctly to the electrical system.

— Switch off electrical equipment that is not
needed.
Both jump start cables must be connected in the
correct order.

Fig. 187 Engine compartment: connectors for jump start
cables or a charger



Fig. 188 Engine compartment: connectors for jump start
cables or a charger

8W7012721BA
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-
it 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. 192 Driver's footwell (left-hand drive vehicle): fuse
panel with plastic clip
3
=f
= & a

x
Ss $ 2 8

Fig. 193 Front passenger's footwell (right-hand drive vehi-
cle): fuse panel with plastic clip


) (brown)
No. | Equipment

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

9 |Hot water pump, engine relay

10 | Oil pressure sensor, oil temperature sensor

Clutch pedal position sensor, engine start,
water pump
i

12 | Engine valves, engine mount

13 | Radiator fan


14 | Fuel injectors, engine control module

271

Index

Driving programs « = sscses x « soins wo soasmes © w vee 140
Driving through water...............005 112
DIVING CINe’s s « ees 5 e com s ean « pee a so 15
Driving tips
Driving through water................. 112
Efficient driving.............00- eee ee 107
Uphilland downhill................... 112
DFiVING Up Hills: < » cams zs saws to eee eo eee 112
Dust filter
refer to Pollutant filter................. 95
DyNamMie Steering « zeny + v sews s wrens + pees 115
E
E-mail
MessageOptionSten so sis 6 2 ames so eeu o 174
SettingS 0.6... cece eee eee eee 174
EDL
refer to Electronic Differential Lock...... 116
EDR
Event Data Recorder...............0.. 275
Efficiency assist.........2....02-000 ee 131
Electrical system. .........-. cee eee eee 229
Electromechanical parking brake......... 110
Electronic Differential Lock.............. Liz
ElectronicimmMobiliZetivcn. s & scsi av areas 6 ease 34
Electronic Stabilization Control........... 116
Embedded. SIM ard « csies ss sss sc cae sve 177
Emergency assistance...............-0. 260
Emergency braking function............. 111
Emergency call..............2200. 172,181
Emergency flashers.............2.-.000- 57
Emergency mode..............--00000- 105
Emergency operation
DOOrs 0... eee ee 32
Fueltillerdoor&#39;ss + say « s nome o < ome a ¢ ae 220
Luggage compartment lid............... 40
Panoramic glass roof.............000005 43
Emissions control system...........005- 220
ERErQy CONSUMES! . «servis oo scesnce © enateny # ae 15
Energy Management’. « scisie + «ssw © ieee a» 107
Engine
Breakingin........... cee ee eee eee eee 106
GOOlANt sxe: 5 = gems x eee 2 s eeeE Ee EE 227
EmergencyStop&#39;s « « swsis «0 case oe rene & oe 100
Jump starting....................00. 266
288
Start/Stop system © cw... ese ve cee ee 107
Starting/stopping..............ee eee 100
Engine compartment
Opening and closing the hood.......... 222
OVEIVIEW&#39;s sees oo sees oo ees on eo @ 2 oe 223
Safety precautions............ 0. eee eee 221
Engine oil
Adding ......... 0. cece eee eee eee 223
CHANGING as = « cows « « cows a a news a x caw 2 226
Checking oil-level).... «cscs as west ao esoowse a 223
Consumption ...........0.0-.0 eee eee 223
Indicator light’: » wces «eos ss sews ee rows 224
Replacement interval................. 233
Temperature display................005 14
Engine sound
Audi drive select..................0.. 114
Engine Start/Stop mode
refer to Start/Stop system............. 107
Efigine Startisystem «in : seem es news & exe 101
Engine stop
refer to Start/Stop system............. 107
Entry/exit lightinGjas « « seus « « sayes « s meas a 2 Sf
Etitity ASSIStAnICE’s s 2 ews 5 2 eee § x epee a eRe 69
also refer to Exit assistance............. 69
also refer to Seats...... 0.0.0. cee eee 69
Environment
Unleaded gasoline............ eee eee 217
ESC Sport... 0.0... cece eee eee eee 118
eSIM
refer to Embedded SIM card............ 177
Event Data Recorder (EDR).............. 275
Exit assistance... 2.2... 60.0.0. cece eee ee 69
Exit WaPOiAGp esse + « sowie 9 0 conse +» eneieue © 8 arene IS2
EXteriOnantenina « was: x + wesw » x nse os canes 167
Exterior lig hitingiecs + + smwas % « somes w 2 amvane «0 see 54
Exteri@r MIPfOPS scsi = see = o ise 2 wom 2 2 60
Folding settings................00 ee eee 31
External voice operation..............-4. 25
F
Factory default settings
Multi Media Interface................. 214
Fast forwarding and rewinding (media files) . 204
Fast forwarding (media files)............ 204
FaStTOutels «cna « o anc © 6 ews +o airs © we 184