2017 AUDI A8 ECU

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 .

0 co .... N ,..._
N .... 0 0 :c ' use the hex head, potentially causing an ac­
cident.
- The factory-supplied jack is intended only
for your vehicle model. Under no circum­
stances should it be used to lift heavy
vehicles or other loads; you r isk injuring
yourself .
- Never start the engine when the vehicle is
ra ised, which could cause an accident.
- Support the veh icle secure ly with appropri­
ate stands if work is to be performed under­
neath the vehicle; otherwise, there is a po ­
tent ial risk for injury .
- Never use the jack supplied with your Audi
on anothe r vehicle, particularly on a heav ier
one . The jack is only suitable for use on the
vehicle it came w ith.
(D Tips
The vehicle jack* in your vehicle is mainte­
na nee-free.
Replacing wheels
Before changing a wheel
Observe the following precautions for your own
and your passenger's safety when changing a
wheel .
.,. After you experience a tire fail ure, pull the car
well away from moving t raff ic and try to reach
le vel ground before you stop¢,&. .
.,. All passengers should
lea ve the ca r and move
to a safe location (for instance, behind the
guardrail) ¢,&. .
.,. Engage the
parking brake to prevent your vehi­
cle from rolling unintentionally¢,&. .
.,. Move
sel ecto r le ve r to pos it ion P ¢ ,&. .
.,. If you a re towing a trailer, unh itch the trailer
from your veh icle.
.,. Take the
jack and the s pare tir e out of the lug ­
gage compartment
¢ page 312.
WARNING
You or your passengers co uld be injured while
chang ing a wheel if you do not follow these
safety precautions:
Em ergenc y ass is tanc e
-If you have a flat tire, move a safe distance
off the road. Turn off the eng ine, turn the
emergency flashers on and use other warn­ ing dev ices to alert other motorists .
- Make sure that passengers wait in a safe
p lace away from the vehicle and well away
from the road and traff ic .
- To help prevent the veh icle from moving
suddenly and possib ly slipping off the jack,
always fully set the park ing brake and block
the wheel d iagonally opposi te the wheel be­
ing changed. When one front whee l is lifted
off the groun d, p lacing the Automatic
Transmission in "P" (Park) w ill
not prevent
the vehicle from mov ing.
- Before you change a wheel, be sure the
g round is leve l and firm. If necessary, use a
sturdy board under the jack .
- Always s tore the vehicle tool kit, the jack
and the replaced tire in the luggage com­
partment
r::> page 213 .
(D Tips
Befo re c hanging the w heel, you must activate
t he jacking mode, so that the a utomat ic co n ­
tro ls for the Adaptive Air Suspension do not
make it more difficult to lift the vehicle with
the jack
¢ page 315.
Changing a wheel
When you change a wheel, follow the sequence
described below step-by-step and in exactly that
order .
1. Activate the vehicle jack mode ¢ page 315 .
2. Remove the decorative wheel cover *. For
more detai ls see also
r:::> page 314, Decora­
tive wheel covers
or ¢ page 314, Wheels
with wheel bolt caps.
3. Loosen the wheel bolts r:=> page 315 .
4. Locate the proper mounting point for the
jack a nd align the jack below that point
r:::> page 315 or ¢page 316.
5. Raise the ca r wi th the jack ¢ page 315 or
r:::> page 316 .
6. Remove the whee l with the flat tire and then
insta ll
the spare r:::>page 318 . IJII>
313

Emerg ency assis ta nce
ground . The base @ must be vertical under the
lifting point @.
.. Wind the jack up further unt il the flat tire
comes off the ground
c:> &,.
Position the vehicle jack onl y under the designat­
ed lifting points on the sill
c:> fig. 2 77. There is ex­
actly
one location for each wheel. The jack must
not be positioned at any other location
c::, ,&.c:>Q) .
An uns table surface u nder the jack can cause the
veh icle to slip off the jack. Always provide a firm
base for the jack on the ground. If necessary
place a sturdy board or similar support under the
jack. On
hard, slippery surfac es (such as tiles)
use a rubber mat or similar to prevent the jack
from slipping
c:> ,&. .
A WARNING
-
-Yo u or your passengers could be injured
wh ile chang ing a wheel if you do not follow
these safety precaut ions:
- Position the vehicle jack only at the desig­
nated lifting points and align the jack.
Otherw ise, the vehicle jack cou ld slip and
cause an injury if it does not have suffi­
cient hold on the vehicle.
- A soft or unstable surface under the jack may cause the vehicle to slip off the jack.
Always p rovide a firm base for the jack on
the grou nd.
If necessary, use a sturdy
board under the jack.
- On ha rd, s lippery surface (such as tiles)
use a rubber mat o r similar to prevent the
jack from slipping.
- T o help prevent injury to yourself and yo ur
passengers:
- Do not ra ise the vehicle until you are sure
the jack is securely engaged.
- Passengers must not remain in the vehicle
when it is jacked up.
- Make sure that passengers wait in a safe
place away from the vehicle and well away
from th e road and traff ic.
- Make sure jack position is correct, adjust
as necessary and then cont inue to raise
the jack.
316
-Changes in temperature or load can affect
the height of the vehicle .
(D Note
Do not lift the vehicle by the s ill. Pos ition the
vehicle jack only at the designated lifting points on the sill. Otherwise, your vehicle wi ll
be damaged.
(D Tips
The vehicle jack mode switches off automati­
cally at speeds above 10 km/h.
58: Raising the vehicle
The vehicle must be li~ed with the jock first be­
fore the wheel con be removed.
Fig. 279 Sill panels: markings
Fig. 2 80 Sill: pos ition ing the vehicle jack
"'"Activate the vehicle jack mode in the MMI:
!CARI function button> Car system s control
button >
Serv ici ng & che ck s > A ir su sp .: jack
mode > On .
.. Engage the parking brake to prevent your vehi­
cle from rolling unintentiona lly.
.. Move the
selec to r le ver to p osition P .
"'" Find the marking (imprint) on the sill that is
nearest the wheel that will be changed
Iii>-

0 co .... N ,..... N .... 0 0 :c ' ¢fig. 279. Behind the marking, there is a lift­
ing point on the sill for the vehicle jack.
~ Turn the vehicle jack located under the lifting
point on the sill to raise the jack until its arm@
¢
fig . 280 is located under the designated plas­
tic mount ¢.&.
in AB: Raising the vehicle on
page 316 ¢
(D.
~ Align the jack so that its arm @¢ fig. 280 en­
gages in the designated lift ing point in the door
s ill and the movable base @ lies flat on the
ground . The base @ must be
vertical under the
lifting point@.
~ Wind the jack up further until the flat tire
comes
off the ground ¢ .&. in AB: Raising the
vehicle on page 316.
Position the vehicle jack only under the designat­
ed lifting points on the sill
¢ page 315, fig. 277.
There is exactly
one l ocation for each wheel. The
jack must not be positioned at any other location
¢&. in AB: Raising the vehicle on page 316¢(]).
An unstable surface under the jack can cause the
vehicle to slip
off the jack . Always provide a firm
base for the jack on the ground. If necessary
place a sturdy board or similar support under the
jack . On
hard, slippery surfaces (such as tiles)
use a rubber mat or s imilar to prevent the jack
from sl ipping
Q &. .
A WARNING
-
-Yo u or your passe ngers could be injured
wh ile chang ing a wheel if you do not follow
these safety precautions:
- Position the veh icle jack only at the desig­
nated lifting points and align the jack .
Otherw ise, the vehicle jack could slip and
cause an injury if it does not have suffi­
cient hold on the vehicle.
-A soft or unstable surface under the jack
may cause the vehicle to slip off the jack.
Always provide a firm base for the jack on
the ground.
If necessary, use a stu rdy
board under the jack .
- On hard, slippery surface (such as tiles)
use a rubber mat or similar to prevent the
jack from slipping .
- To help prevent injury to you rself and yo ur
passengers:
Emergency assistance
- Do not raise the vehicle until you are sure
the jack is securely engaged.
- Passengers must not remain in the vehicle
when it is jacked up.
- Make sure that passengers wait in a safe
place away from the vehicle and well away
from the road and traffic.
- Make sure jack position is correct, adjust
as necessary and then continue to raise
the jack.
- Changes in temperature or load can affect
the height of the vehicle.
(D Note
Do not lift the vehicle by the sill. Position the
vehicle jack only at the designated lifting
points on the sill. Otherwise, your vehicle will
be damaged.
(D Tips
The vehicle jack mode switches off automati­
cally at speeds above 10 km/h.
317

Emergency situations
@ Tips
The discharged battery must be properly con­
nected to the vehicle's electrical system .
When jump starting or charging the battery,
never connect the negative ground cable to
the battery negative post because the battery
manager system must be able to detect the
battery's state of charge. Always connect the
negat ive ground cable to the negative ground
pos t of the battery manager control unit.
Using the jump start
cable
Both jump start cables must be connected in the
correct order!
Fig. 290 E ngin e compartme nt: co nn ectors for jump start
cables and a charger
Fig. 291 Jump starting using a battery in anot her vehicle:
A -prov idin g current, B -drai ned
The procedure for connecting jump start cables
that is descr ibed next is designed to help jump
start your vehicle.
Vehicle with discharged battery:
... Turn off lights and accessories, move automatic
transmission lever to N (Neutral) or P (Park)
and set parking brake.
328
Connecting the positive cable (red) to the
positive terminal
... Open the cover on the positive terminal
qfig . 290.
1. Secure one end of the pos itive cable (red) to
t he jump start pin
(D q fig. 291 (pin under
the cover = "plus") on the vehicle that needs
to be started @.
2. Secure the other end of the positive cable
(red) to the positive terminal @on the bat­
te ry provid ing the cur rent @.
Connecting the negative cable (black) to the
negative terminal
3. Secure one end of the negative cable (black)
to the negative terminal @ on the battery
that is providing the current @.
4. Secure the other end of the negative cable
(black) to the jump start pin@ (hex head pin
= "negative") on the vehicle that needs to be
started @.
Starting the engine
... Sta rt the eng ine on the vehicle providing the
jump start @and let it run at idle .
... Now start the engine on the vehicle with the
drained battery @.
... If the engine does not start, stop the starting
procedure after 10 seconds and then repeat it
after approximately 30 seconds .
... Remove the cables whe n the engi nes are run­
ning. Remove them in reverse order from the
way they were installed.
" Close the cover on the positive terminal.
The battery is vented to the outside to prevent
gases from enter ing the vehicle interior. Make
sure that the jumper clamps are well connected
with their
metal parts in full contact with the
battery terminals .
A WARNING
To avoid serious personal injury and damage
to the vehicle, heed all warnings and instruc­
tions of the jumper cable manufacturer. If in
doubt, call for road service .
- Jumper cables must be long enough so t hat
the vehicles do not touch.
Ill>

-When connect ing jumper cables, make sure
that they cannot get caught in any mov ing
parts in the engine compartment.
- Before you check anything in the engine
compartment, a lways read and heed a ll
WARNINGS
¢ page 271.
(D Note
Impro per hook-u p of jum per cables can ru in
the generato r.
- Always connect POSITIVE( +) to POSITI VE
( + ), and NEGATIVE( -) to NEGATIVE( -)
g round post of the battery manager contro l
unit.
- Check that a ll screw p lugs on the batt ery
cells are sc rewed in firmly. If not, t ighten
pl ugs p rior to connect ing clamp on negative
b atte ry te rmi nal.
- Please note t hat the procedure fo r con nect­
i ng a jumper cab le as desc ribed above ap­
p lie s specifica lly to the case of yo ur vehicle
b eing ju mp started. When you are g iv ing a
ju mp s tart t o another vehicle, do
not con­
n ect th e neg ative( -) ca b le to the neg ative
( -) t ermin al on t he disch arge d batte ry @
¢ fig . 291 . Instead, secure ly connect the
n egative(- ) cab le to either a solid metal
com ponent that is f irm ly bolted to the en­
gine block o r to the engine bloc k itself. If
the battery that is be ing c ha rged does not
vent to the outs ide, escap ing batte ry gas
could ignite and ex plod e!
Towing with a tow truck
General hints
Yo ur Audi requires special h andling for towing .
The follow ing information is to be us ed by com­
mercia l tow tr uck o pera tors w ho kn ow how to op ­
e rat e the ir equip men t sa fely.
- Never tow your Audi. Towing will cause dam­
age to the engine and transmission .
- Never wrap the safety chains or winch cables
~ around the brake lines. ,..,
~ - To prevent unnecessary damage, your Audi N
8 must be transported with a flat bed truck . 0 :r Emergency situations
-To load the vehicle on to the flat bed , use the
towing loop found in the vehicle tools and at­
tach to the front or rear anchorage
¢ page 329 and c> page 330.
A WARNING
A veh icle being towed is not safe for passen­
gers. Neve r allow anyo ne to ride in a vehicle
b eing towed, for any reason.
Front towing loop
Fi g. 29 2 Fron t bumper: removing th e cap
Fig. 293 Fron t bumper: insta lling the towing loop
The thread for the towing loop is on the right
s ide of the front bumper beh ind a cap.
.,. Remove the towing loop f rom the vehicle too l
kit.
.,. Press the cap inward with brief, forceful pres­
sure
c> fig. 292 . The cap will loosen from the
bumper .
.,. Tighten the tow ing loop in the threaded open­
ing until it stops
c> fig. 293 and then tighten it
w ith a wheel w re nch .
.,. Afte r usi ng, p la ce th e tow ing loop b ack i n the
-
veh icle tool kit. ..,.
329

Emergency situations
_& WARNING
If the towing loop is not tightened until it
stops when installing, the threads may be
pulled out when towing the vehicle and that
could cause an accident.
Rear towing loop
F ig. 294 Re ar bumper: re moving the cap
Fig. 295 Re ar bumpe r: in stalli ng the towing loop
The threaded open ing is loca ted in the bumper
on the right rear side .
.. Remove the towing loop from the vehicle tool
kit .
.. Press the cap inward with brief, forceful pres­
sure <:>
fig. 294. The cap will loosen from the
bumper .
.. Tighten the towing loop in the threaded open­
ing until it stops ¢
fig. 295 and then tighten it
with a wheel wrench .
.. After using, place the towing loop back in the
vehicle tool kit.
8_ WARNING
If the towing loop is not tightened until it
stops when installing, the threads may be
330
-
pulled out when towing the vehicle and that
could cause an accident .
Loading the vehicle onto a flat bed truck
Fig. 296 Vehicle on f lat bed tru ck
Front hook up
I
.. Align the vehicle with the centerl ine of the car
car rier ramp .
.. Attach the winch hook to the front towline eye
previously installed.
Rear hook up
.. Align the vehicle wi th the centerl ine of the car
car rier ramp .
.. Attach the w inch hook to the rear towline eye
previously installed.
@ Tips
Check carefully to make sure the hook-up is
secure before moving the car up the flatbed
truck ramp .
Vehicle transport
Whenever you hove your vehicle transported, be
sure to note the following:
(D Note
Mount the tie-down chains/cables over the
running surface (circumference) o f the tires.
Never secure the vehicle by the axle, the sus­
pension struts or the front or rear towline
eye. For technical reasons, the pressure in the
suspension struts may change during the
transport and this will adversely affect veh icle
handling.

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