2018 AUDI A8 ECU

lL t:0 ....
'"" " '"" .... 0 0 :c ' Description
The lower anchorage positions are marked for
quick locating .
Fig. 2 4 5 Rear seatbacks: locator buttons for lower ancho­
rages
i r
F ig. 2 46 Rear seats: lower a nchorage bracket locations
Attachment lo ca tor marker s for lower
a nchorages
Circular locator buttons on the rear seatback in­
d icate the lower anchorage locations on the rear
seating positions
<> fig. 245.
Lowe r an chorages
The lower anchorage attachment points are lo­
cated between the rear seatback and rear seat
cushion
~ fig . 246.
Lower anchorages secure the child restraint in
the seat without using the vehicle's safety belts.
Anchorages provide a secure and easy-to-use at­
tachment and m inim ize the possibility of improp­
er chi ld restraint insta llation.
All child restraints manufactured after Septem­
ber
1, 2002, must have lower anchorage attach­
ments for the
LATCH system .
Remember that the lower anchorage points are
only intended for installation and attachment of
Child s afe ty
child restraints specifically certified for use with
LATCH lower anchorages. Child restraints that
are not equ ipped w ith the lower anchorage at­
tachments can still be installed in compliance
with the chi ld restraint manufacturer's instruc­
t ions on us ing vehicle safety belts.
A WARNING
-
Improper use of LATCH lower anchorages can
cause ser ious personal inju ry in an accident.
- Always carefully follow the ch ild rest raints
manufacture r's instructions fo r proper in­
stallat ion of t he chi ld restraint and proper
use of the lower ancho rages or safety belts
in your vehicle.
- Never secure or attach any luggage o r othe r
items to the
LATCH lower anchorages.
- Always read and heed the important info r­
mat ion about ch ild rest raints in this chapter
and
WARNINGS~ page 249, Child safety.
Guidance fixtures for lower anchorages
Special guidance fixtures increase the conven­
ience of the lower an chorages and are available
from your authorized Audi dealer.
Fig. 24 7 Outer rear seats: installing the guidance fixtures
F ig . 2 48 Close-up: fitting the guidance fixture over the
l ower anchorage bracket
263

Child sa fet y
The lower anchorage attachment points are lo ­
cated on the rear seats between th e seatback and
the seat cushion. Special guidance fixtures in­
crease the convenience of the lower anchorages
and help protect the seat material from possible
damage when instal ling ch ild restraints.
In stall ing the guidance fi xtu re s
.,. Push down on the seat cushion so that the low ­
er anchorages are visible .
.,. Hold the guidance fixture with the part number
facing downward and push it in the d irection of
the arrow onto the anchorage
c> fig . 248 .
.,. Make su re that each of the two guida nce fix­
tures per seat snaps i nto place.
Remo ving th e guidance fixtures
.,. Remove the ch ild restraint acco rding the ch ild
restra int manufacturer's instructions.
.,. Push down on the seat cushion so that the low­
er anchorages a re v is ible .
.,. Pull off the g uidance fixtures from the lower
an chorages.
.,. A lways remove the guidan ce fix tures and keep
them in a safe p lace when not in use .
You may find it easier to install ch ild restrain ts
eq uipped w ith hooks a ttached to straps withou t
the guidance f ix tu res in place . If th is is the case,
remove the g uidance fixtures by pu lling them off
the anchorages . However, the guidance f ixtures
can help you to locate the
LA TCH anchorages.
A WARNING
Improper use of tether anchorages or lower
anchorages can cause serious personal injury
in a crash .
- Always carefully follow the child restra int
manufacturer's instruct io ns for proper in­
stallation and use of child restra int systems .
- Never use the
LATCH or tether anchorages
to attach safety belts or other kinds of occu ­
pant restrai nts .
- Child restra int tether attachments and low­
er attachments are only des igned to secure
a c hild restraint that has been equ ipped to
use these anchorages .
264
"
-Tet her anchorages a nd lower anchorages
are designed to withstand only those loads imposed by correct ly fitted child restraints.
Under no circumstances can they be used
safe ly for adult or ch ild safety bel ts or har­
nesses .
- Never mount more than one child restraint to a sing le tet her or to a lower anchorage
point . Attaching two child restra ints to a
sing le anchorage poin t ca n cause the a n­
chorage to fail and c ause ser io us perso nal
in jury in a crash .
(D Note
- Remove the guidance fixt ures before fold­
ing the re ar seatba ck to preven t damag ing
the seat c ushion .
- T o attach the c hild rest raint se curely, the
s ea t must be moved to the farthest rea r po­
sit io n, the sea t height se t to t he lowest po­
sitio n and the hea d rest raint must be a d­
justed to the vertical position.
-I f you leave t he gu idance fixture s installed
for several days, they could leave a mark on
the u pholstery on the seat cushion and
backrest in the area that the guidance fix­
t u res were insta lled. T he upholstery wo uld
also be perma nently st retched around the
guidance fixt ures. This applies especially to
leather seats .
Installing a child restra int w ith LATCH
lower anchorages
Whenever you install a child restraint always fol­
low the child res traint manufa cturer's instru c­
tions.
Fig. 249 Lower ancho rages : pro per m ount ing

lL t:0 ....
"' ......
"' .... 0 0 :c ' Mounting
.,. Make sure the seatback of the rear seat bench
is in the upright position and securely latched
in place .
... Attach both hook -on connectors with the spring
catch release on the child safety seat onto the
LATCH lower anchorage so that the connectors
lock into place
¢ fig. 249.
... Pull on the connector attachments to make
sure they are properly attached to the LA TC H
l ower anchorage.
.,. Pull straps tight fo llowing the child restra int
manufacturer's instructions.
Releasing
... Loosen the tension on the straps following the
child restraint manufacturer's instruct ions .
.,. Depress the spring cat ches to release the an­
chorage hooks from the lower anchorages.
Remember: Use tether straps to help keep the
chi ld restraint firm ly in place .
.&, WARNING
Improper use of the LATCH sys tem can in­
crease the risk of serious personal injury and
death in an acc ident .
- T hese anchors were deve loped only for child
safety seats using the "LATCH" system.
- Never attac h other child safety seats, belts
o r othe r ob jects to these anchors.
- Always ma ke sure that you hear a click when
latch ing the seat in place.
If you do not hear
a click the seat is not secure and could fly
f orward and hit the interior o f the vehicle,
or be ejected from the vehicle .
.&, WARNING
Improper installation of child restraints will
increase the r isk of injury in an acc ident.
- Always follow the child restra int system
man ufactu rer's instruct ions for proper in­
sta llation of the child restraint system and
proper use of tether straps as well as the
lower anchorages or safety be lts in your ve­
hicle .
- Always read and heed the important infor­
mation and WARNINGS about child safety
Ch ild s afe ty
and the installat ion of child restraint sys­
tems
¢ page 249, Child safety .
(D Note
On vehicles with power adjustable rear seats*
some criteria must be observed when attach­ ing the child restraint using the
LATCH sys­
tem:
- To attach the child restraint securely, the
seat must be moved to the farthest rear po­
sition, the seat height set to the lowest po­
sition and the head restraint must be ad­
justed to the vertical position.
- If a child safety seat is attached to one of
the rear seats, th is seat must not be adjust­
ed using the power controls under any c ir­
cumstances. The
Entry as sis tance for this
sea t must also be deactivated in the MM I
¢ page 58. The child safety seat as well as
the rear seat can be damaged by the adjust­ ment process.
Tether anchors and tether straps
F ig. 250 Tether ancho rs: recess flaps behin d the rear seat­
backs
The tether anchors for the two* /three rear seat­
ing pos it ions are located in recesses in the rear
window
shelf ¢ fig. 250. Vehicles with two rear
seating pos itions* are equipped with two tether
anchors .
A tether is a straight or V-shaped strap that at­
taches the top part of a ch ild restraint to special
anchorage points in the veh icle.
The purpose of the tether is to reduce the for­
ward movement of the chi ld restraint in a crash,
in order to help reduce the risk of head injury
..,_
265

Child safety
that could be caused by striking the vehicle inte­
rior .
Forward facing child restraints manufactured af­
ter September 1, 1999, are required by U .S. fed­
eral regulations to comply with new child head
movement performance requirements. These
new performance requirements make a tether
necessary on most new child safety seats .
A WARNING
Improper installation of child restraints will
increase the risk of injury and death in a
crash.
- Always follow the instructions provided by
the manufacturer of the child restraint you intend to install in your Audi .
- Improper use of child restraint anchors (in ­
cluding tether anchors) can lead to injury in
a collision . The anchors are designed to
withstand only those loads imposed by cor­ rectly fitted child restraints.
- Never mount two child restraint systems on
one LATCH lower anchor point.
- Never attach two child restraint systems to
one tether strap or tether anchorage.
- Never attach a tether strap to a tie-down
hook in the luggage compartment.
- Never use child restraint tether anchorages
to secure safety belts or other kinds of occu­ pant restraints.
- Never secure or attach any luggage or other
items to the LATCH lower anchorages or to
the tether anchors.
- If a tether or other strap is used to attach a
child restraint to the front passenger seat,
make sure that it is not so tight, that it
causes the weight-sensing mat to measure
more weight than is actually on the seat.
- The heavier weight registered can make the
Advanced Airbag System work as though an
adult were on the seat and deploy the Ad­
vanced Airbag when it must be suppressed causing serious or even fatal injury to the
child.
- If you must install a rearward facing child
safety seat on the front passenger seat be­
cause of exceptional circumstances and the
266
'
PASSENGER AIR BAG OFF light does not
come on and stay on, immediately install
the rear-facing child safety seat in a rear
seating position and have the airbag system
inspected by your Audi dealer .
Installing the upper tether strap on the
anchorage
Fig. 251 Tet her s trap: pro per routing an d mo unting
Installing the tether strap
.,. Release or deploy the tether strap on the child
restraint according to the child restraint manu­
facturer's instructions .
.,. Guide the upper tether strap under the rear
head
restraint ~ fig. 251 (raise the head re­
straint if necessary). For child restraints with V­
tether straps, always make sure that the head
restraint guide rods do not interfere with any
part of the top tether strap .
.,. Center seating position*: Guide the upper teth­
er strap over the rear head restraint.
.,. Tilt the recess flap up to expose the anchor bracket .
.,. Attach the tether strap anchorage hook into
the opening of the tether anchorage .
.,. Pull on the tether strap hook so that the spring
catch of the hook engages.
.,. Tighten the tether strap firmly following the
child restraint manufacturer's instructions.
Releasing the tether strap
.,. Loosen the tension following the child restraint
manufacturer's instructions .
.,. Depress the spring catch on the hook and re­
lease it from the anchorage.

Checking and Filling
Cl osing the ho od
~ Push the hood down until you override the
force of the strut .
~ Let the hood fall light ly into the latch. Do not
press it in.
c::> .&_ .
A WARNING
-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.
Engine compartment overview
The most important check points .
-For safety reasons, the hood must always be
closed securely while driv ing. Because of
this, always check the hood after closing it
to make sure it is latched correctly . The
hood is latched if the front corners cannot
be lifted.
-If you notice that the hood is not latched
while you are driving, stop immed iate ly and
close
it, because d riving when the hood is
not latched increases the r is k of an accident.
Fig. 258 Typical locatio n of the rese rvoir and the engi ne o il fille r open ing
(D Washer fluid reservoir (Q) c::> page 281
@ J ump start point(-) with hex head screw
c::> page 280, c::> page 32 7
® Jump start point(+) under a cover
c::> page 280, c::> page 32 7
@ Engine oil label * w ith VW standard
c::> page 2 75
274
® Engine oil filler opening ( page 2 76
@ Brake fl uid reservo ir ((0)) c::> page 2 79
(J) Coolant reservoir (-L) c::> page 2 78
The engine oil filling opening (item @) may be
l ocated in a different area depending on the en-
gine version.
.,.

Checking and Filling
-With all these variables coming into play,
no standard rate of o il consumption can be
established or specified. There is no alterna­
tive to checking the oil level regularly and
frequently.
- If you have the impression your engine con­
sumes excessive amounts of oil, we recom­
mend that you consult an authorized Audi
dealer to have the cause of your concern properly diagnosed . Keep in mind that the
accurate measurement of oil consumption
requires great care and may take some
time. An authorized Audi dealer has instruc­
tions about how to measure oil consump­
tion accurately.
- You can find information on engine oil and
engine oil capacities for the USA at
www.audiusa.com/help/maintenance, or
for Canada at www.audi.ca/ca/web/en/
customer-area/ care-a nd-maintena nee/ aud
i­
service-schedules. html , or call
800 -822-2834.
Adding engine oil
Fig. 259 Engine co mpartment : en gin e oil fille r opening
c ove r
0 N
-N ,.:
gi
Observe the safety precautions c::, &. in Working
in the engine compartment on page
2 72.
"Turn the engine off.
" Open the hood c::, page 2 73.
" Unscrew the cap 't=?1 for the engine oil filling
opening
c::, fig. 2 59.
"Carefully add 0.S quart (0 .5 liter) of the correct
oil
c::, page 275.
"Close the engine oil filler opening cap.
"Close the engine compartment lid.
276
"Restart the ignition after two minutes and read
the current oil level in the Infota inment system
c::, page 275, Checking the engine oil level.
"Add more oil if necessary.
A WARNING
-When adding oil, do not let oil drip onto hot
engine components . This increases the risk
of afire.
- You must seal the cap on the oil filler open­
ing correctly so that oil does not leak out
onto the hot engine and exhaust system
when the engine is running, because this is
a fire hazard.
-Always clean skin thoroughly if it comes into
contact with engine oil.
- Engine oil is poisonous and must be kept
out of reach of children.
- Store the engine oil securely in the original
container.
(D Note
- If the message l!I Oil level is too full.
Please reduce oil level. appears, there is too
much oil in the engine and there is a risk of
catalytic converter and engine damage. Do
not start the engine . Contact an authorized
Audi dealer or authorized Audi Service Fa­
cility to have excess engine oil extracted if
necessary.
- Your Limited New Vehicle Warranty does
not cover damage or malfunctions due to
failure to follow recommended mainte­
nance and use requirements as set forth in
the Audi Owner's Manual and Warranty & Maintenance booklet.
- Use only a high quality engine oil that ex­
pressly complies with the Audi oil quality
standard specified for your vehicle's engine .
Using any other oil can cause serious engine
damage .
- Do not mix any additional lubricants into
the engine oil. Damage caused by such addi-
tives is not covered by the warranty.
.,._

Checking and Filling
If you must add coolant, use a mixture of water
and coolant additive . Mixing the coolant additive
with distilled water is recommended.
Coolant additive
The coolant additive is made of anti-freezing and
corros ion protection agents. Only use the follow ­
ing coo lant additives .
Coolant additive Specification
Gl2evo
TL 774 L
Gl2++ TL 774 G
Gl3
TL 774 J
These additives may be mixed wi th each othe r.
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 coo lant can free ze
and damage the engine.
Coolant addi- Freeze protec-
tive tion
Warm regions min.
40%, min. -13 °F
max . 45% (-25 °()
C old regions min.
50%, max. -40 °F
max.
55% (-40 °C)
@ Note
-Before the start of winter, have an author­
ized Audi dealer or authorized Audi Service
Faci lity check if the coolant additive in your
vehicle matches the percentage appropriate
for the climate. This is especially important
when driving in colder climates .
-If the appropriate coolant additive is not
available in an emergency, do not add any
other addit ive for risk of damaging the en­
g ine . 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 coolant.
-Radiator sealant must not be mixed w ith
the coolant.
278
Adding coolant
Fig. 260 Eng in e compar tment : coolant exp ansion tank
cover
Observe the safety precautions ~.&, in Working
in the engine compartment on page 2
72.
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 ~ page 2 74. The coolant leve l must be be­
tween the MIN and MAX markings when the en­
gine in co ld. When the engine is warm it can be
slightly above the MAX marking,
Adding coolant
Requirement: there must be a residual amount of
coolant in the expansion
tank ~(©) .
~ Let the engine cool down .
~ Place a cloth over the coolant expansion tank
cap and unscrew the cap counterclockwise
~.&. -
~ Add coo lant mixed in the correct ratio
~ page 277 up to the MAX marking.
~ Make sure that the f luid level remains stable.
Add more coolant if necessary .
~ Close the cap securely .
Coo lant loss usually indicates there is a leak . Im ­
mediate ly drive your vehicle to an authorized
Audi dealer or authorized Audi Service Fac ility
and have the cooling system inspected. If the
cooling system is not leaking, a loss can come
from the coolant bo iling t hrough overheat ing
and being pushed out of the cooling system .

u. co .... N
" N .... 0 0 :c ' use the hex head, potentially causing an ac­
c ident.
- The factory-supplied jack is intended on ly
for your vehicle m odel. Under no circum­
stances should it be used to lift heavy
vehicles or other loads; you r isk injuring
yourself .
- Never start the en gine when the vehicle is
ra ised, which could cause an accident .
- Support the veh icle secure ly w ith appropr i­
ate stands if work is to be performed under­
neath the vehicle; otherwise, there is a po ­
tent ial risk for in ju ry .
- Never use the jack supplied with your Audi
on another vehicle, particularly on a heav ier
one . The jack is only suitable for use on the
vehicle it came w it h .
(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 yo u experience a tire fail ure, pull the car
we ll away from moving t raffic and t ry to rea ch
level g round before you s top ¢&, .
.,. All passengers sho uld lea ve the ca r and move
to a saf e location (for instance, be hind t he
guardrai l) ¢ &, .
.,. Engage the parking brake to prevent you r vehi­
cle from rol ling
unintentionally ¢ A_.
.,. Move selector lever to position P ¢ A_.
.,. If you a re towing a trailer, unh itch the trailer
from your ve hicle.
.,. Take the jack and the spare tire ou t of the lug­
gage compa rtment
¢ page 312.
A WARNING
You or your passengers cou ld be inju red wh ile
chang ing a wheel if you do not follow these
safety precautions :
Emergenc 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 fu lly set the par king brake and block
the front and back of the wheel diagonally
opposite the wheel being changed. W hen
one front w heel is li fted off the gro und,
p lacing the Au tom atic Transmi ssion in P
(Park) will
not p revent the vehicle from
mov ing.
- Before you change a wheel, be sure the
g ro u nd is leve l and firm. If necessary, use a
sturdy board under the jack .
- Always s tore the vehicle tool ki t, the jack
an d the replaced tire in the luggage com­
pa rtment ¢
page 213 .
(D Tips
Befo re c hangin g the wheel, you mus t activ ate
the jacking mode, so that the a utomat ic con ­
tro ls for the Adaptive Air Suspension do not
make it more di fficult 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 de corative wheel cover *. For
more detai ls see
a lso ¢ page 314, Decora­
tive wheel covers
or ¢ page 314, Wheels
with wheel bolt caps .
3. Loosen the wheel bolts ¢ page 315 .
4. Loca te t he p roper mount ing point for the
jac k and alig n the jack be low that po int
¢page 315 or ¢ page 316.
S. Rai se the ca r wi th the jack ¢ page 315 or
¢page 316 .
313