2018 AUDI A5 COUPE radiator

Driving
St ee ring lock1
)
The stee ring locks when you t urn the engine off
using the
! S T A RT ENGINE ST OP I button and
open the driver 's door. The locked steering helps
prevent v ehicle theft .
Emergency off function*
If it is abso lutely necessary, the engine can also
be turned off while dr iv ing at speeds star ting at
4 mph (7 km/h). To switch the eng ine off, press
the
! S TAR T ENGINE ST OP I button tw ice in a row
briefly or press and hold for longer than two sec­
onds.
A WARNING
- Never turn off the engine before the veh icle
has come to a comp lete stop . The full func­
t ion of the brake booster and the power
stee ring is not guaranteed. Yo u must use
more force to turn or b rake . Because you
cannot s teer an d brake as you usu ally
would, t his co uld lead to accidents and ser i­
ous in juries.
- Alw ays t ake the key wi th you w henever you
leave you r vehicle . Othe rw ise, the engi ne
cou ld be started o r electrical equipment
s uch as the power windows cou ld be operat­
ed . This can lead to se rious injury.
- For safety reasons, always park the vehicle
with the se lector lever in the P position
(a u­
tomat ic transmission) or with 1st gear en­
gaged (manual transmission). Otherwise
the vehicle could roll away u nintent ionally .
(D Note
If the eng ine has been under heavy load for
an extended per iod of t ime, heat builds up in
the engine compartment after the engine is
sw itched off and there is a risk of damaging
the engi ne . For this reason, let the engi ne run
for at idle for approximately two minutes
be­
fore shutting it off.
l) Th is fun ction is not avai la bl e in al l co un tries.
90
(D Tips
Fo r u p to 10 minutes after stopping the en­
g ine, the radiator fan may turn on again auto­
matically or it may continue to r un (even if
the ig nition is switched off) for the following
r easons:
- The coolant temperature is increas ing due
to trapped heat.
- If the eng ine is wa rm and the eng ine com­
partment a lso heats up from strong sun­
light .
- Applies to: vehicles with diesel particulate
filter: The emissions control system is heat­
ed through the regeneration process, even if
the engine has not reached its operat ing
tempe rature yet.
Messages
Engin e running . Warning! Turn off ignition be ­
fore leavin g vehicle
This message appears and a warning tone sounds
i f you open the drive r's door w hen the eng ine is
r un ning .
Applies to: vehicles with manual transmission
Please pres s clutch pedal
This message appears if you do not press the
clutch pedal to start the eng ine. The engine can
o nly be started w hen the clutch pedal is pressed.
Applies to: vehicles with automatic transmissions
Plea se pres s brake pedal
This message appears if you do not press the
bra ke peda l when sta rting t he eng ine .
Ill Remote control key : key not recognized. Is
the key still in the vehicle ?
This indicator light turns on and this message ap­
pears if the ignition key was removed from the
vehicle when the engine was running . If the igni­
tion key is no longer in the vehicle, you cannot
switch on the ignition or start the engine once

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3 a,
Parking systems
General information
Applies to: ve hicles with a rea r parking sys te m /pa rking sys­
tem plus/rearv iew camera/peripheral cameras
Depending on your vehicle's equipment, various
parking aids will help you when parking and ma­
neuvering.
The
rear parking system is an audible parking aid
that warns you of obstacles
behind the vehicle
¢page 142.
T he
parking system plus assists you when park ­
ing by audibly and visually indicating objects de­
tected
in front of and behind the vehicle
¢ page 142.
T he
rearview camera shows the area behind the
vehicle in the Infotainment system display . The
lines in the rearview camera image help you to
park or maneuver ¢
page 143. The parking sys­
tem plus functions are also available
¢ page 142.
The
peripheral cameras give various views to
help you when parking or maneuvering
¢
page 145 . The parking system plus functions
are also available
¢ page 142.
A WARNING
-Always look for traffic and check the area
around your vehicle by looking at it directly
as well. The parking system cannot replace
the driver's attention. The driver is always
responsible when entering or leaving a park­
ing space and during similar maneuvers .
-
-Please note that some surfaces, such as
clothing, are not detected by the system .
-Sensors and cameras have blind spots in
which people and objects cannot be detect­
ed . Be especially cautious of small children
and animals.
-Always keep your eyes on the vehicle's sur ­
roundings, using the rearview mirror as
well.
-The sensors can be displaced by impacts or
damage to the radiator grille, bumper,
wheel housing and the underbody . The park­
ing system may be impaired as a result.
Parking systems
Have an authorized Audi dealer or author­
ized Audi Service Facility check their func­
tion.
(D Note
-Some objects are not detected or displayed
by the system under certain circumstances:
-objects such as barrier chains, trailer draw bars, vertical poles or fences
-objects above the sensors such as wall ex ­
tensions
-objects with certain surfaces or structures
such as chain link fences or powder snow
-If you continue driving closer to a low ob­
ject, it may disappear from the sensor
range . Note that you will no longer be
warned about this obstacle.
-Keep enough distance from the curb to re ­
duce the risk of damage to the rims.
(!) Tips
-The system may provide a warning even
though there are no obstacles in the cover ­
age area in some situations, such as:
-certain road surfaces or when there is tall
grass
-external ultrasonic sources such as from
cleaning vehicles
-in heavy rain, snow, or thick vehicle ex­
haust
-We recommend that you practice parking in
a traffic-free location or parking lot to be­
come familiar with the system. When doing
this, there should be good light and weath­
er conditions .
-You can change the volume of the signals
and the display ¢
page 148.
-Please refer to the instructions for towing a
trailer located in
¢page 149.
-What appears in the infotainment display is
somewhat time-delayed.
-The sensors must be kept clean and free of
snow and ice for the parking aid to operate.
141

Checking and Filling
areas, into open streams or down sewage
drains.
- Recycle used engine oil by taking it to a used
engine oil collection facility in your area, or
contact a service station .
Cooling system
Coolant
The engine cooling system is filled with a mixture
of pur ified water and coolant addit ive at the fa c­
tory . T his coolant must not be not changed.
The coolant leve l is monitored through
the . in­
d icator
light ~ page 30. Howeve r, we do recom­
mend occasionally check ing the coo lant level
manually.
I f you must add coolant , use a m ixt ure of water
a nd coolant addit ive. M ixing the coolant additive
with d istilled water is recommended .
Coolant additive
The coolant addit ive is made of anti-freez ing and
corros ion protection agents . Only use the fo llow­
ing coolant add it ives . These additives may be
mixed w ith each other.
Coolant additive Specification
G13
TL 774)
G12++ TL
774 G
The amount of coo lant additive that needs to be
mixed with water depends on the climate where
the vehicle will be operated . If the coolant addi­
tive percentage is too low, the coolant can free ze
and damage the eng ine.
Coolant Freeze protec-
tion
additive
Warm m in .40% m in . - 13 °F
reg io ns (-25 °C)
max. 45%
Cold min
. 50% max. -40 °F
reg ions (-40 °C)
max . 55%
336
(D Note
- Before the start of winter, have an a uthor­
ized Aud i dea ler or a uthorized Audi Service
Facility check if the coo lant add itive in your
vehicle matches the pe rcentage appropr iate
for the climate. This is especially important
when drivi ng i n colder climates .
- If the appropriate coo lant additive is not
available in an emergency, do not add any
ot her additive. Yo u could damage the en­
gine. If this happens, only use wa ter and re­
s tore the correct m ix tur e ratio wi th the
specifie d coo lant ad ditive as soon as poss i­
ble.
- Onl y refill with new coolan t.
- Radiator sealant must not be mixed with
the coolant.
Adding coolant
Fig. 278 Engine compa rtment: release butto n on coo lant
expansion ta n k
Observe the safety precautions ~ A in Working
in the engine comportment on page 330.
Checking the engine coolant level
.,. Park the vehicle on a level surface .
.,. Switch the ignit io n off.
.,. Read the coolant level on the coolant expansion
tank
¢ fig. 278 .
.,. The coolant leve l must be between the MIN and
MAX markings when the engine in cold. When
the engine is warm it can be slightly above the MAX marking .
Adding coolant
.,. Let the engine cool down.

.. Place a cloth over the coolant expansion tank
cap .
.. Push the release button ¢ fig. 2 78 and careful­
ly unscrew the cap to the left until you feel re­
sistance¢ &_ .
.. Push the release button again and remove the
cap completely .
.. Make sure that the fluid level remains stable .
Add more coolant if necessary .
.,. Turn the cap to the right to secure it until yo u
feel resistance a second time.
Coolant loss usually indicates there is a leak . Im­
mediately drive your vehicle to an authorized
Audi dealer or authorized Aud i Serv ice Facility
and have the cooling system inspected. If the
cooling system is not leaking, a loss can come
from the coolant boiling through overheating
and being pushed out of the cooling system.
A WARNING
- The cooling system is under pressure. Do
not open the coolant expansion tank cap
when the engine is hot. This increases the
risk of burns .
-The coolant additive and the coolant can be
dangerous to your health . For this reason,
keep the coolant in the original container
and away from children. There is a risk of
poisoning.
-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.
CD Note
Do not add coolant if the expansion tank is
empty. There may be air i n the cooling sys­
tem, which increases the risk of engine dam­
age . If this is the case, do not continue driv­
ing . See an authorized Audi dea ler or author­
ized Aud i Service Facility for assistance.
Checking and Filling
Brake fluid
Fig. 279 E ng in e compartment : cap on brake fluid reservo ir
Observe the safety precautions ¢&. in Working
in the engine compartment on page 330 .
Checking the brake fluid level
... Read the brake fluid level on the brake fluid
reservoir¢ page 332, fig . 276 . The brake fluid
level must be between the MIN and MAX mark­
ings¢_.&. .
The brake fluid level is monitored automatically.
Changing the brake fluid
Have the brake fluid changed regularly by an au­
thorized Audi dealer or authorized Audi Service Facility.
A WARNING
- If the brake flu id level is below the MIN
marking, it can impair the brak ing effect
and driving safety, wh ich increase the risk of
an accident. Do not continue dr iving . See an
authorized Audi dealer or authorized Audi
Serv ice Facility for assistance.
-If the brake fluid is old, bubbles may form
in the brake system dur ing heavy braking.
This would impair braking performance and
driving safety, which increases the risk of an
accident.
-To ensure the brake system functions cor­
rectly, only use brake fluids that comp ly
with VW standard 501 14 or FMVSS-116 DOT 4.
CD Note
-If the brake flu id l eve l is above the MAX
marking, brake fluid may leak out over the
337

Charging the vehicle battery
Fig. 280 Engine compartment : connectors for a charger
and jump start cables
Requirement: only use chargers with a maximum
charging voltage of 30 amps/14.8 Volts.
The
vehicle battery cables remain connected .
.,. Read the warnings¢ & in General warnings
about batteries on page 338
and ¢ ,& .
.,. Switch off the ignition and all electrical equip­
ment .
.,. Open the hood ¢ page 331 .
.,. Open the red cover on the positive terminal
¢ fig. 280 .
.,. Clamp the charger terminal clamps to the jump
start pins
according to the instructions . (pin
under the red cover= "positive", pin with hex­
agonal head= "negative").
.,. 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 charger terminal clamps.
.,. Close the red cover on the positive terminal.
.,. Close the hood ¢ page 331 .
A WARNING
-A highly explosive mixture of gases can form
when charging batteries. Only charge the
vehicle battery in well-vent ilated areas.
-A drained vehicle battery can freeze at tem­
peratures around 32
QF (0 QC). A frozen or
thawed vehicle battery must not be charged
and must not be used anymore. The battery
housing can crack and battery acid can leak
out if ice forms, which increases the risk of
an explosion and chemical burns. Contact an
Checking and Filling
authorized Audi dealer or authorized Audi
Service Facility for more information.
- Do not connect or disconnect the charging
cable while charging because this increases
the risk of an explosion.
@ Tips
- Only charge the vehicle battery through the
connections in the engine compartment.
- Read all of the manufacturer's instructions
for the charger before charging the vehicle
battery.
Windshield washer system
Fig. 281 E ngine compartmen t: was her fluid reservoi r cap
The windshield washer fluid reservoir O contains
the cleaning solution for the windshield and the
headlight washer
system*¢ page 332, fig. 276 .
The reservoir capacity can be found in
¢ page 388.
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.
(D Note
-The concentration of ant i-freezing agent
must be adjusted to the vehicle operating
conditions in the respective climate . A con­
centration that is too high can lead to vehi-
cle damage.
- Never add radiator anti-freeze or other addi-
tives to the washer fluid.
.,..
339

Fuses a nd bul bs
Fuse panel @ (brown) Fuse panel© (blac k)
No. Equip ment No. Equipm ent
2
Mass airflow sensor, camshaft adjust-
ment, charge air cooler pump 1 F ront seat heating
2 Windshield wipers
3 Exhaust doors, fuel injectors, radiator inlet 3 Left head light electronics
4 Vacuum pump , hot water pump, particu-
late sensor, biodiesel sensor 4 Panorama glass roof
s Left front door contro l module
5 Brake light sensor 6 Sockets
6 Engine valves, camshaft adjustment 7 Right rear door control mod ule
7
Heated oxygen sensor, mass airflow sen-8 All wheel drive
sor
8
Water pump, high pressure pump, high
pressure regulator valve
9 Hot water pump
9 Right headlight electronics
10
Windshield washer system/headlight
washer system
11 L eft rear door control module
10
Oil pressure sensor, oil temperature sen-
sor
Fu se panel @ (blac k)
11 Clutch pedal position sensor No. Equipmen t
12 Engine valves
Seat ventilation, rearv iew mirror, climate
13 Rad iator fan control system, rear climate control sys-
14 Fuel injectors
15 Ignition
coils
16 Fuel pump
1 tern controls , windsh ie ld heat ing , neck
heating, front passenger 's airbag warning
light
2 Gateway, climate control system
Fuse panel@ (red ) 3 Sound actuator/exhaust sound tuning
No. Equ ip me nt 4 Clutch pedal posit ion sensor
1 Anti-theft alarm system 5 Engine start
2 Engine control module 7 Rear USB charg ing port
3 Lumbar support 8 Homelink
4 Automatic transmission selector mecha-
nism 9 Adaptive cruise contro l
11 Video camera
5 Horn 12 Matrix LED headlight/right L ED headlight
6 Electromechan ica l park ing brake 13 Matrix LED headlight/left LED headlight
7 Gateway control module
8 Interior headl iner lights
10 Airbag control module
11 Electronic Stabilization Control (ESC)
Fuse panel © (red )
N o. Equ ipmen t
1 Ign ition co ils
12 Diagnostic connector, light/rain sensor
13 Climate control system
14 Right front door control module
lS A/C compressor
5 Engine mount
6 Automatic transmission
7 Instrument panel
8 Climate control system (blower)
10 Dynamic steering
11 Engine start
378