2017 AUDI A8 radiator

0 co .... N ,..._
N .... 0 0 :c ' @ Tips
-Some noise after starting the engine is nor­
mal and is no cause for concern.
- If you leave the vehicle with the ignition
switched on, the ignition will switch off af­
ter a certain amount of time. Make sure that
electrical equipment such as the exterior
lights are switched off.
Stopping the engine
"'Bring the vehicle to a full stop.
"'Select the P or N selector lever position.
"'Press the
I START ENGINE STOPI button
r::?v page 76, fig. 90.
Steering lock
The steering locks when you turn the engine off
using the
I START ENGINE STOPI button and
open the driver's door. The locked steering helps
prevent vehicle theft.
Emergency off function
If it is absolutely necessary, the engine can also
be turned off while driving in the R, Dor S selec­
tor lever position at speeds below 6 mph (10 km/
h). To stop the engine, press and hold the
I START ENGINE STOPI button and also press the
brake pedal.
& WARNING
-Never turn off the engine before the vehicle
has come to a complete stop. The full func­
tion of the brake booster and the power
steering is not guaranteed. You must use
more force to turn or brake. Because you
cannot steer and brake as you usually
would, this could lead to accidents and seri­
ous injuries .
- Always take the key with you whenever you
leave your vehicle. Otherwise, the engine
could be started or electrical equipment
such as the power windows could be operat­
ed. This can lead to serious injury.
- For safety reasons, always park the vehicle
with the selector lever in the P position.
Driving
Otherwise, there is the risk that the vehicle
could roll unintentionally.
@ Note
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 damaging
the engine. For this reason, let the engine run
at idle for approximately two minutes before
shutting it off.
(D Tips
After the engine has been switched off, the
radiator fan can continue to run for up to 10
minutes -even with the ignition switched off .
It can also switch on again after some time if
the coolant temperature rises as the result of
heat buildup or if the engine is already warm
and the engine compartment is also heated
by the sun's rays.
Messages in the instrument cluster display
Turn off ignition before leaving car
This message appears and a warning tone sounds
if you open the driver's door when the ignition is
switched on.
Press brake pedal to start engine
This message appears when you press the
I START ENGIN E STOP ! button to start the engine
and do not press the brake pedal while doing so .
The engine can only be started when the brake
pedal is pressed.
= Key not in 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
you stop it. You also cannot lock the vehicle from
the outside.
Shift to P, otherwise vehicle can roll away.
Doors do not lock if lever is not in P.
77

Parking systems
Parking systems
General information
Applies to: vehicles with parking system plus/rearview cam­
era/peripheral camera
Depending on your vehicle's equipment , various
parking aids will help you when parking and ma­
neuvering.
The
parking system plus assists you when park­
ing by audibly and visually indicating objects de­
tected in front of and behind the vehicle
¢page 115.
The rearview camera shows the area behind the
vehicle in the Infotainment system display. This
display assists you when you are cross or parallel parking
¢ page 116. The parking system plus
functions are also available
¢ page 115.
The peripheral cameras give various views to
help you when parking or maneuvering
¢ page 119. The parking system plus functions
are also available
¢page 115.
& 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 .
- The sensors can be displaced by impacts or
damage to the radiator gr ille, bumper,
wheel housing and the underbody . The park­
ing system may be impaired as a result.
Have an authorized Audi dealer or author­
ized Audi Service Facility check their func­
tion .
- Make sure the sensors are not obstructed by
stickers, deposits or other materials. If they
are, the sensor function could be impaired.
For additional information on cleaning, see
c:> page 306.
114
(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 th is obstacle.
(D 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 and pitch of the
signals as well as the display¢
page 124.
-Please refer to the instructions for towing a
trailer located in
¢page 124.
-What appears in the infotainment display is
somewhat time-delayed.
- The sensors must be kept clean and free of
snow and ice for park aid to operate .

Checking and Filling
-Set the parking brake.
- Select the P selector lever position.
- Let the engine cool down.
- Never open the hood when there is steam or
coolant escaping from the engine compart­
ment, because there is a risk that you could
be burned. Wait until no steam or coolant is
escaping.
- Keep children away from the engine com­
partment.
- Never spill fluids on a hot engine. These flu­
ids (such as the anti-freezing agent con­
tained in the coolant) can ignite.
- Avoid short circuits in the electrical system.
- 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 personal injury.
- Never open the cap on the coolant expan­
sion tank when the engine is warm. The
cooling system is under pressure.
- To protect your face, hands, and arms from
hot steam or coolant, cover the cap with a
large cloth when opening.
- Do not remove the engine cover under any
circumstances. This increases the risk of
burns.
- If tests need to be performed with the en­
gine running, there is additional danger due
to moving components (such as the ribbed
belt, alternator and radiator fan) and from
the high-voltage ignition system .
- Do not under any circumstances activate the
throttle inadvertently (for example, by hand
from the engine compartment) if the vehi­
cle is stationary but the engine is running
and a gear is engaged. Otherwise, the vehi­
cle will start to move immediately and this
could result in an accident.
- Pay attention to the following warnings list­
ed when work on the fuel system or on the
electrical equipment is required.
- Do not smoke .
- Never work near open flames.
- Always have a working fire extinguisher
nearby
- All work on the battery or electrical system
in your vehicle can result in injuries, chemi-
272
cal burns, accidents or burns. Because of
this, all work must be performed
only by an
authorized Audi dealer or authorized Audi
Service Facility .
- To reduce the risk of electric shock and in­
jury, never touch the following components when the engine is running or is being start­
ed:
- Ignition cable
- Other components in the electronic high-
voltage ignition system
- If you must check or perform work on the
engine while it is running:
- Set the parking brake and place the selec­ tor lever in the P (park) position first.
- Always proceed with extreme caution so
that clothing, jewelry or long hair do not
become caught in the radiator fan, fan
belt or other moving components or do
not come into contact with hot compo­
nents . Tie back long hair before beginning
work and do not wear clothing that can
hang down into the engine .
- Limit your exposure to exhaust and chemi­
cals to as short a time as possible
c:> ,&. .
.&_ WARNING
California Proposition 65 Warning:
- Engine exhaust, some of its constituents,
and certain vehicle components contain or
emit chemicals known to the State of Cali­
fornia to cause cancer and birth defects and
reproductive harm. In addition, certain flu­
ids contained in vehicles and certain prod­
ucts of component wear contain or emit
chemicals known to the State of California
to cause cancer and birth defects or other
reproductive harm .
- 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.

Checking and Filling
Coolant addit iv e
The coolant additive is made of anti-freezing and
corrosion protection agents. Only use the fo llow­
ing coolant additives .
Coolant additive Sp ecification
G13 TL 774)
G12++ TL 774 G
These additives may be mixed with each other.
The amount of coolant additive that needs to be
mixed w ith water depends on the climate where
the vehicle will be operated . If the coolant addi­
tive percentage is too low, the coo lant can freeze
and damage the engine.
Coolant addi- Freeze protec-
tive tion
Warm regions min
. 40%,
min. -13 °F
max. 45% (-25 °C)
Cold regions min . 50%, max. -40 °F
max. 55% (-40
°C)
(D Note
-Before the start of winter, have your author­
ized Audi dealer or authorized Audi Service
F ac ility check if the coolant additive in you r
vehicle matc hes the percentage appropriate
fo r the clim ate. This is espe cially important
when driving in colder climates .
-If the appropriate coolant addi tive is not
available in an emergency, do not add any
other additive for risk of damaging the en ­
gine. If this happens, only use water and re­
store the correct mixture ratio with the
specified coolant additive as soon as possi­
ble.
- Only refill with new coo lant.
- Radiator sealant must not be mixed with
the coo lant.
278
Adding coolant
Fig. 261 E n g in e compartment: coolant expansion tank
cover
Observe the safety precautions ¢ .&. in Working
in the engine compartment on page 2 71.
Check ing the engine coolant level
.,. Park the vehicle on a level surface.
.,. Switch the ignit ion off.
.,. Read the coolant level on the coolan t expansion
tank
¢page 274. The coolant leve l must be be­
tween the M IN and MAX markings when the en­
gine in cold . When the engine is warm it can be
slightly above the MAX marking .
Adding coolant
Requirement: there m ust be a residua l amount of
coolant in the expansion t ank
~ CD.
.,. Let the engine cool down .
.,. Place a cloth
over the coolant expansion tank
cap and unsc rew the cap cou nte rclockw ise
~ .&. -
.. Add coolant mixed in the correc t ratio
~ page 277 up to the MAX marking.
.,. Make sure that the fluid level remains stable.
Add more coolant if necessary .
.,. Close the cap securely .
Coo lant loss usually indicates there is a leak . Im­
med iate ly 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 leak ing, a loss can come
from the coolant boiling through overheat ing
and being pushed ou t of the cooling system .

C)
_& 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 add itive 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 sw itch
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. Air could enter the cooling system and
damage the engine. If this is the case, do not
continue driv ing. See an authorized Audi deal­
er or authorized Audi Service Facility for assis­
tance.
Brake fluid
N
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-N
" co IXl
F ig. 262 Engine compartment: cap on brake fluid re servoir
Observe the safety precautions c:> &. in Working
in the engine compartment on page 2 71.
Checking the brake fluid level
" Read the brake fluid level on the brake fluid
reservoir
c:> page 2 74, fig. 259. The brake fluid
level must be between the MIN and MAX mark­
ings
c:> &_ .
~ The brake fluid level is mon itored automatically .
" N ...... 0 0 :r Checking and Filling
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 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 dr iving. See an
author ized Audi dealer or author ized Audi
Service 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 r isk of an
accident.
- To ensure the brake system functions cor­
rectly, only use brake fluids that comply
with VW standard 50114 or FM VSS -116 DOT 4.
CD Note
-If the brake f luid level is above the MAX
marking, brake f luid may leak out over the
edge of the reservoir and result in damage
to the vehicle.
- Do not get any brake fluid on the vehicle
paint, because it wi ll corrode the paint.
Battery
General warnings about batteries
Because of the complex power supply, all wo rk
on batter ies such as disconnecting, replac ing,
etc. should
only be performed by an authorized
Audi dealer or authorized Audi Service Fac il ity
c:> & .
The term "vehicle battery" refers to the 12 Volt
battery in your vehicle.
Detailed warnings for the vehicle battery:
® Wear eye protection.
I.)._ Bat~ery acid is highly corrosiv~. Wear pro-
~ tect1ve gloves and eye protection. Ill-
279

0 co .... N ,..... N .... 0 0 :c ' ~ Clamp the charger terminal clamps to the jump
start pins according to the instructions. (pin un­
der the cover= "pos it ive", pin with hexagonal
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 cab le out of the
socket.
~ Now remove the charg ing device terminal
clamps.
~ Close the cover @on the positive terminal and
re-install the cover
(D.
~ Close the hood c:> page 2 73.
A drained battery can freeze at temperatures
around 322F (OQC). A frozen or thawed out bat­
tery must no longer be used. The battery housing
could be cracked by the formation of ice, which
could cause battery acid to leak out
c:> A .
Charg ing the b att ery
On ly use chargers with a ma ximum cha rg ing
voltage of 14.8 V. The battery connecting cables
do not need to be disconnected. Do not open the
battery when charg ing .
Read a ll of the manufact urer 's instructions for
the charger before charging the battery.
A WARNING
- A highly exp losive mixture of gases can form
when charging batter ies. Only charge the
vehicle battery in well-vent ilated areas.
- A drained battery can freeze at tempera­
tures around 32 °F (0 °C). A frozen or
thawed ve hicle battery must not be charged
and must not be used anymore. The battery
housing can crack and battery acid can leak
o ut if ice fo rms, wh ic h in creases the r is k of
an exp losion and chemica l burns. Conta ct an
au thori zed Aud i dealer o r autho rized Aud i
Service Facility fo r mo re information.
- Do not connect o r disconnect the charg ing
cable while charg ing because th is increases
the risk of an exp losion.
Ch eck ing and Filling
{!) Tips
-Only charge the vehicle battery through the
connect ions in the engine compartment.
- Read all of the manufacturer's instructions
for the charger before charging the vehicle battery.
Windshield washer system
F ig . 2 64 Engine compartmen t: was her fluid reservo ir cap
M N ~ N
"' co m
The windshield washer fluid reservoir O contains
the cleaning solution for the w indshield and the
headlight washer system¢
fig. 264, ¢ page 2 74.
The reservoir capacity is found in c:> page 334 .
To reduce the risk of lime scale deposits on the
spray nozzles, use clean water with low amo unts
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-freez ing agent
must be adjusted to the veh icle operat ing
conditions in the respective climate . A con­
centration that is too high can lead to vehi­
cle damage.
- Never add radiator anti-free ze or other addi­
tives to the washer fluid.
- Do not use a glass cleaner that con ta ins
pai nt so lvents, because t his could damage
t he paint.
281

0 co .... N ,..... N .... 0 0 :c ' today's automobiles, have steadily reduced the
scope of maintenance and repairs which can be
carried out by vehicle owners.
Also, safety and
environmental
concerns place very strict limits
on the nature of repairs and adjustments to en­
gine and transmission parts which an owner can perform .
Maintenance, adjustments and repairs usually re­
quire special tools, testing devices and other
equipment available to specially trained work ­
shop personnel in order to assure proper per­
formance, reliability and safety of the vehicle and
its many systems.
Improper maintenance, adjustments and repairs
can impair the operation and reliability of your
vehicle and even void your vehicle warranty .
Therefore, proof of servicing in accordance with
the maintenance schedule may be a condition for upholding a possible warranty claim made within
the warranty period.
Above all , operational safety can be adversely af­
fected, creating unnecessary risks for you and
your passengers.
If in doubt about any servicing, have it done by
your authorized Audi dealer or any other properly equipped and qualified workshop. We strongly urge you to give your authorized Audi dealer the
opportunity to perform all scheduled mainte­ nance and necessary repairs. Your dealer has the
facilities, original parts and trained specialists to keep your vehicle running properly .
Performing limited maintenance yourself
The following pages describe a limited number of
procedures which can be performed on your vehi­
cle with ordinary tools, should the need arise and
trained personnel be unavailable. Before per­
forming any of these procedures, always thor­
oughly read all of the applicable text and careful­ ly follow the instructions given . Always rigorously
observe the
WARNINGS provided .
Before you check anything in the engine com­
partment, always read and heed all WARNINGS
c::> .&. and c::> .&. in Working in the engine compart­
ment on page 271 .
Consumer information
A WARNING
-Serious personal injury may occur as a result
of improperly performed maintenance, ad ­
justments or repairs .
- Always be extremely careful when working
on the vehicle. Always follow commonly ac­
cepted safety practices and general com­
mon sense. Never risk personal injury.
- Do not attempt any of the maintenance,
checks or repairs described on the following pages if you are not fully familiar with these
or other procedures with respect to the ve­ hicle, or are uncertain how to proceed.
- Do not do any work without the proper tools
and equipment. Have the necessary work
done by your authorized Audi dealer or an­
other properly equipped and qualified work­
shop.
- The engine compartment of any motor vehi­ cle is a potentially hazardous area. Never reach into the area around or touch the radi­
ator fan.
It is temperature controlled and
can switch on suddenly - even when the en­
gine is off . The radiator fan switches on au ­
tomatically when the coolant reaches a cer­
tain temperature and will continue to run
until the coolant temperature drops.
- Always switch off the ignition before anyone
gets under the vehicle .
-Always support your vehicle with safety
stands if it is necessary to work underneath
the vehicle . The jack supplied with the vehi­
cle is not adequate for this purpose and
could collapse causing serious personal in­
jury.
- If you must work underneath the vehicle
with the wheels on the ground, always make
sure the vehicle is on level ground, that the
wheels are always securely blocked and that
the engine cannot be started.
- Always make sure the transmission selector
lever (automatic transmission) is in "P"
(Park position) and the park brake is ap-
plied.
~
337