2018 AUDI A8 coolant

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.
.,.

u. co .... N
" N .... 0 0 :c ' @ For the sake of the environment
-Oil should never enter the sewer system or
come into contact with the ground.
- Pay attention to legal requirements when
disposing of empty oi l containers .
Changing the engine oil
We recommend that hove your oil changed by on
authorized Audi dealer or a qualified service sta­
tion .
Before you check anyt hing in the engine compart ­
ment,
alw ays re ad and h eed all W ARNINGS ¢ &
in Working in the engine comportment on
page 272.
The engine oil must be changed according to the
intervals specified in your Warranty
& Mainte­
nance booklet . This is very important because the
lubricating properties of oil diminish gradually
during normal vehicle use.
Under some circumstances the engine oi l should
be changed more frequently. Change oil more of­
ten if you drive mostly short distances, operate
the vehicle in dusty areas or under predominantly
stop-and-go traffic condit ions, or have your vehi­
cle where temperatures remain below freezing
for extended periods .
Detergent additives in the oil will make fresh oil
look dark after the engine has been running for a
short t ime . Th is is normal and is not a reason to
change the oil more often than recommended .
Because of the problem of proper disposal, along
with the special tools and necessary expertise re­
qu ired, we strongly recommend that you have
your oil changed by an authorized
A ud i d ea ler or
a qualified se rvice station .
If you choo se to chang e your o il y ou rse lf, please
note the following important information:
A WARNING
T o reduce the r isk of personal injury if you
must change the engine oil in your ve hicle
yourse lf:
- Wear eye protection .
-
Check ing and F illing
- To reduce the risk of burns from hot engine
oil, let the engine cool down to the touch.
- When removing the oil drain p lug with your
fingers, stay as far away as possible. Always keep your forearm parallel to the ground to
help prevent hot oil from running down your
arm.
- Drain the oil into a container designed for
this purpose, one large enough to hold at least the total amount of oil in your engine.
- Engine oil is poisonous. Keep it well out of
the reach of children .
- Continuous contact with used engine o il is
harmful to your skin. Always protect your
skin by wash ing oil off thoroughly with soap
and wate r.
@ Note
Never mix oil additives with your engine oil.
These add itives can damage your engine and
adversely affect your Audi L imited New Vehi­
cle War ranty .
@ For the sake of the environment
-Before chang ing your o il, first make sure
you know where you can properly d ispose of
the used oil.
- Always dispose of used engine o il properly .
Do not dump it on garden so il, wooded
areas, i nto open streams o r down sewage
dra ins.
- Recycle used eng ine o il by tak ing it to a used
eng ine oi l collection fac ility in yo ur area, or
c ontact a se rvice station.
Cooling system
Coolant
The eng ine cooling system is filled w ith a mixture
of purified water and coolant additive at the fac­
tory. This coolant must not be not changed .
The coo lant level is mon itored through
the . in­
dicator
light¢ page 20. However, we do recom­
mend occasionally checking the coolant level
manually .
.,.
277

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 .

lL
_& 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. Air could enter the cooling system and
damage the engine. If this is the case, do not
continue driving. See an authorized Audi deal­
er or authorized Audi Service Facility for assis­
tance.
Brake fluid
N N
-N
" co IX)
Fig. 261 Engine compartment: cap on brake flu id reservoir
Observe the safety precautions ~&. in Working
in the engine compartment on page 2
72.
Checking the brake fluid level
.. Read the brake fluid level on the brake fluid
reservoir
~ page 274, fig. 258. The brake fluid
level must be between the MIN and MAX mark­
ings~&. -
~ The brake fluid level is monitored automatically .
...... N ...... 0 0 :c ' Checking and Filling
Changing the brake fluid
Have the brake fluid changed regularly by an au­
thorized Audi dealer or authorized Audi Service
Facility.
_& 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
authorized 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 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 comply
with VW standard 50114 or FMVSS-116 DOT 4.
CD 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 get any brake fluid on the vehicle
paint, because it will corrode the paint.
Battery
General warnings about batteries
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
~ .&. .
The term "vehicle battery" refers to the 12 Volt
battery in your vehicle.
Detailed warnings for the vehicle battery:
® Wear eye protection.
b. Bat~ery acid is highly corrosive. Wear pro-
~ tect1ve gloves and eye protection. Ill>-
279

Wheels
Bead
means the part of the tire that is
made of steel wires, wrapped or
reinforced by ply cords and that is
shaped to fit the rim .
Bead separation
means a breakdown of the bond
between components in the bead .
Cord
means the strands forming the
plies in the tire .
Cold tire inflation pressure
means the tire pressure recom­
mended by the vehicle manufac­
turer for
a tire of a designated
size that has not been driven for more than a couple of miles (kilo­
meters) at low speeds in the
three hour period before the tire pressure is measured or adjusted .
Curb weight
means the weight of a motor ve­
hicle with standa rd equipment in ­
cluding the maximum ca pacity of
fuel, oil, and coolant, air condi ­
tioning and addit ional weigh t of
optional equipment.
E x tra load tire
means a tire designed to operate
at higher loads and at higher
in -
28 6
flation pressures than t he corre­
spond ing standard tire. Extra load
tires may be identified as "X L",
"xl" , "EXTRA LOAD" , or "RF" on
the sidewall.
Gross Axle Weight Rating ("GAWR")
means the load-car rying capacity
of a single axle system , measu red
at the ti re-ground interfaces .
Gross Vehicle Weight Rating
("GVWR")
means the maximum total loaded
weight of the vehicle .
Groove
means the space between two ad­
jacent tread ribs .
Load rating (code)
means the maximum load tha t a
tire is rated to carry for a given i n­
flation pressure. You may no t find
this informat ion on all ti res be­
cause it is not required by law .
Maximum load rating
means the load rating for a tire at
the maximum permissible infla­
tion pressure for that tire .
Maximum loaded vehicle
weight
means t he sum of:

Wheels
sure that load limits are not ex­
ceeded. Vehicle load includes ev­
erybody and everything in and on
the vehicle. These load limits are
technically referred to as the vehi­
cle's
Gross Vehicle Weight Rat­
ing
("GVWR").
The "GVWR" includes the weight
of the basic vehicle, all factory in­
stalled accessories, a full tank of
fuel, oil, coolant and other fluids plus maximum load. The maxi­
mum load includes the number of
passengers that the vehicle is in­
tended to carry ("seating capaci­
ty") with an assumed weight of
150 lbs. (68 kg) for each passen­
ger at a designated seating posi­
tion and the total weight of any
l uggage in the vehicle. If you tow
a trailer, the weight of the trailer
hitch and the tongue weight of
the loaded trailer must be includ­
ed as part of the vehicle load.
The
Gross Axle Weight Rating
("GAWR") is the maximum load
that can be applied at each of the
vehicle's two axles.
The fact that there is an upper
limit to your vehicle's Gross Vehi­
cle Weight Rating means that the
total weight of whatever is being
296
carried in the vehicle (including
the weight of a trailer hitch and the tongue weight of the loaded
trailer) is limited. The more pas­
sengers in the vehicle or passen­
gers who are heavier than the
standard weights assumed mean
that less weight can be carried as l uggage .
The Gross Vehicle Weight Rating
and the Gross Axle Weight Rating
are listed on the safety compli­
ance sticker label located on the
driver's side B-pillar
¢ page 293,
fig. 266.
_& WARNING ~
Overloading a vehicle can cause
loss of vehicle control, a crash
or other accident, serious per­
sonal injury, and even death.
-Carrying more weight than
your vehicle was designed to
carry will prevent the vehicle
from handling properly and increase the risk of the loss of
vehicle control.
-The brakes on a vehicle that
has been overloaded may not
be able to stop the vehicle
within a safe distance.

Technical data
Dimensions
Length (in (mm )) Width (in (mm))
Width across the Height at curb
mirrors (in (mm)) weight (in (mm))
AB L 207.3 (5,265) 76.7 (1,949) 83.l (2,111) 57.9 (1,471)
AB 202.2 (5,135) 76.7 (1,949) 83.1 (2,111) 57.5 (1,460)
58 202.6 (5,147) 76.7 (1,949) 83.l (2,111) 57.4 (1,458)
Capacities
Fuel
tank
Windshield and headlight washer system*
Weights
Gross Vehicle Weight Rating
The Gross Vehicle Weight Rating (GVWR), and
the Gross Axle Weight Rating (GAWR) for front
and rear are listed on a sticker on the door jamb
on the driver's side .
The Gross Vehicle Weight Rating includes the
weight of the basic vehicle p lus full fuel tank, oi l
and coolant, plus maximum load, which includes
passenger weight (150 lbs/68 kg per designated
seating position) and luggage
we ight¢ &..
Gross Axle Weight Rating
The Gross Ax le Weight Rating is the maximum
load that can be applied at each axle of the vehi ­
cle
¢ &. .
Vehicle capacity weight
The vehicle capacity weight (max. load) is listed
either on the driver's side B-pillar or inside the
fue l filler f lap .
A WARNING
- The actual Gross Axle Weight Rating at the front and rear axles should not exceed the permissible weights, and their comb inat ion
must not exceed the Gross Veh icle Weight
Rating .
334
Approximate capaci-
ties
2 1. 7 gal (82.0
L)
5.3 qt (5.0 L)
- Exceed ing permissible weight ratings can
result in vehicle damage, accidents and per­
sonal injury.
@ Note
- The veh icle capacity weight figures apply
when the load is d istr ibuted evenly in the
vehicle (passengers and luggage) . When
transport ing a heavy load in the luggage
compartment, carry the load as near to the
rea r axle as possible so that the vehicle's
hand ling is not impai red.
- Do not exceed the maximum permissible
ax le loads or the maxim um gross vehicle
we ight . A lways remember that t he ve hicle's
handling will be affected by the extra load.
Th erefore, adjust your speed accordingly .
- Always observe local regulations .

u. co .... N
" N .... 0 0 :c ' today's automobiles, have steadily reduced the
scope of maintenance and repairs which can be
carried out by veh icle owners.
Al so , sa fet y a nd
en vironmental
concerns place very strict limits
on the nature of repairs and adjustments to en­
g ine and transm ission parts wh ich a n owner can
perform .
Maintenance, adjustments and repairs usually re­
qu ire special tools, test ing devices and other
equ ipment available to specially trained work ­
shop personnel in order to assure proper per­
formance, re liability a nd safety of the veh icle and
its many systems .
Improper maintenance, adjustments and repairs
can impair the operation and reliab il ity of your
ve hicle and even void your veh icle warranty .
Therefo re, proof of se rvicing in accordance w ith
the ma intenance schedule may be a condition fo r
upho ld ing a possib le warranty claim made within
the warranty period.
Above all , ope rational safety can be adversely af­
fected, creating unnecessa ry risks fo r yo u and
your passengers.
I f in do ubt about any servicing, have it done by
your author ized Audi dealer or any other prope rly
eq uipped and qua lified workshop. We strongly
u rge yo u to g ive your author ized Audi dealer the
opportunity to perform a ll scheduled mainte ­
nance and necessary repairs. Your dealer has the
facilities, original parts and trained specialists to keep your veh icle running properly .
Pe rforming limit ed maint enanc e yourself
The fo llowing pages describe a limited number of
procedures which can be performed on your ve hi­
cle with ordinary tools, should the need arise and
trained personnel be unavailable. Before per­
forming any of these procedures, always thor­
oug hly read a ll of the app licable text and careful­
ly follow the instructions g iven . Always rigorously
observe the
W ARNINGS prov ided .
Before you check an ything in the eng ine com ­
partment , alw ays read and he ed all WARNINGS
c:> &. and c:> &. in Working in the engine compart­
ment on page 2
72 .
Con sum er In form ation
A WARNING
--
- Ser ious personal injury may occur as a result
of improperly performed maintenance, ad ­
justments or repairs .
- Always be extremely careful when work ing
on the vehicle . Always follow commonly ac­
cepted safety practices and general com­ mon sense. Never risk pe rsonal inj ury.
- Do not attempt any of the maintenance,
checks or repairs described on the following pages if you are not fu lly famil iar with these
or other proced ures with respec t to the ve­
h icle, or are uncerta in how to pro ceed.
- Do not do any work without the proper tools
and eq uipment. Have the necess ary wo rk
done by your authorized Audi dealer or an­
other proper ly 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
g ine is off . The radiator fan switches on au­
tomatically when the coolant reaches a cer­
tain tempe rature and will cont inue to run
until the coolant temperature d rops.
- Always sw itch off the ignition before anyone
gets under the vehicle.
- Always support your veh icle with safety
stands if it is necessary to work underneath
the vehicle. The jack suppl ied with the veh i­
cle is no t adequate for this pu rpose and
could collapse caus ing serious personal in­
jury.
- If you must wor k unde rne ath the vehicle
with the wheels on the ground, always make
sure the vehicle is on level ground, that the
wheels a re always sec urely blocked and that
the engine cannot be started.
- Always make sure the transmission se lector
lever (automatic transmiss ion) is in
"P"
(Park position) and the pa rk brake is ap­
plied.
337