cooling AUDI A8 2018 User Guide

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

u. co .... N
" N .... 0 0 :c ' Closing/opening . . . . . . . . . . . . . . . . . . . . . . . 30
Closing aid (doors) . . . . . . . . . . . . . . . . . . . . .
27
Cockpit (overview) 7
Coming home . . . . . . . . . . . . . . . . . . . . . . . . .
46
Compartments . . . . . . . . . . . . . . . . . . . . . . . . 63
Compass in the mirror . . . . . . . . . . . . . . . . . . 52
Compliance . . . . . . . . . . . . . . . . . . . . . . . . . . 339
Conference call . ............... .. .. .. . 150
Connecting and disconnecting an MP3 play-
er
· · · ·.............................. 184
Connections
refer to Media 181,190
Consumer Inform ation .......... .. . 215,336
Consumption (fuel) ................... .
Contacting NHT5A .............. ... .. .
Contacts Importing/expo rting
Convenience key 12
215
152
154
Unlocking/locking . . . . . . . . . . . . . . . . . . . . 30
Cooling mode (automatic climate control) . . 70
Cooling system Checking/adding coolant. . . . . . . . . . . . . . 277
Coolant temperature indicator . . . . . . . . . . . 9
Cover Flow
refer to Browsing through album covers . 191
Cup holders . . . . . . . . . . . . . . . . . . . . . . . . . . .
63
Current consumption . . . . . . . . . . . . . . . . . . . 12
D
Data encryption 197
Data recorder . . . . . . . . . . . . . . . . . . . . . . . . 133
Date ...... .. .. ................ ... .. . 205
Date display . . . . . . . . . . . . . . . . . . . . . . 16, 205
Daylight saving time . . . . . . . . . . . . . . . . . . . 205
Daytime running lights . . . . . . . . . . . . . . . . . 43
Declaration of compliance . . . . . . . . . . . . . . 339
Defrosting (windows) . . . . . . . . . . . . . . . . . . . 71
D EF (instrument cluster) . . . . . . . . . . . . . . . . 10
Demo mode
refer to Presentation mode . . . . . . . . . . . . 17 3
Determining correct load limit . . . . . . . . . . 297
Diesel Diesel particulate filter 27 2
Digital compass . . . . . . . . . . . . . . . . . . . . . . . 52
Digital Rights Management . . . . . . . . . . . . . 181
Index
Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . 334
Directory
refer to Contacts . . . . . . . . . . . . . . . . . . . . 152
Display Brightness .. .. .. .. ... .. ..... ... 197,207
Settings ...... .. .. ............. 191, 197
Distance
· · ·.......................... 12
Doors Child safety lock . . . . . . . . . . . . . . . . . . . . . . 36
Closing aid . . . . . . . . . . . . . . . . . . . . . . . . . .
27
Emergency locking . . . . . . . . . . . . . . . . . . . . 32
Driver information system . . . . . . . . . . . . . . . 12
Indicator lights . . . . . . . . . . . . . . . . . . . . . . 17
Service interval display . . . . . . . . . . . . . . . 281
Driver seating position . . . . . . . . . . . . . . . . . 209
Drives
ref er to Media ..... ............. 181, 190
Drive select . . . . . . . . . . . . . . . . . . . . . . . . . . 111
Driving sa fely . . . . . . . . . . . . . . . . . . . . . . . . 208
Driving through water . . . . . . . . . . . . . . . . . . 73
Driving time . . . . . . . . . . . . . . . . . . . . . . . . . .
12
DVD
Changer 183
Drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 182
Full screen display . . . . . . . . . . . . . . . . . . . 191
also refer to Media .. ............. 181, 190
DVD Parental control . . . . . . . . . . . . . . . . . . 19 7
Dynamic steering .. .. ............. 111, 130
Dynamic volume
refer to System volume . . . . . . . . . . . . . . . 206
E
Economy tips (efficiency program) . . . . . . . . 13
Efficiency program . . . . . . . . . . . . . . . . . . . . .
13
Electromechanical parking brake . . . . . . . . . 81
Electronic Differential Lock (EDL) . . . . . . . . 127
Electronic immobilizer . . . . . . . . . . . . . . . . . .
28
Electronic speed limiter . . . . . . . . . . . . . . . . . 26
Electronic Stabilization Control (ESC) . . . . . 127
Emergency assistance . . . . . . . . . . . . . . . . . 312
Emergency braking function . . . . . . . . . . . . . 81
Emergency flashers . . . . . . . . . . . . . . . . . . . .
46
Emergency locking the front passenger's door 32
343

u. co .... N
" N .... 0 0 :c ' Voice recognition system . . . . . . . . . . . . . . . 1 42
Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . 206
Volume . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 135
I nput level . .. ............. .. .. .. .. . 191
w
Wa rni ng/Indicato r lights
A irbag system . . . . . . . . . . . . . . . . . . . . . . 237
P ASS ENG ER AIR BAG O FF . . . . . . . . . . . . . 237
Warning lights
Index
Vehicle battery . . . . . . . . . . . . . . . . . . . . . . 2 80
Windshie ld washer system . . . . . . . . . . . . 281
Win ter tires. . . . . . . . . . . . . . . . . . . . . . . . . . 298
Wiper b lades .. .. .. .. ............... .. . 51
Wire less headphones (RS E) . . . . . . . . . . . . . 199
X
Xenon-Lights . . . . . . . . . . . . . . . . . . . . . . . . . 3 26
Xenon plus headlights . . . . . . . . . . . . . . . . . . 43
refer to Indicator lights . . . . . . . . . . . . . . . . 1 7 z
Warning triangle .. .. ..... ... .. .. .... . 3 12
Wa rranty coverages . . . . . . . . . . . . . . . . . . . 336
Was hing matte finish paint . . . . . . . . . . . . . 306
Weights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 334
Wheel bolts Rep lac ing a wheel . . . . . . . . . . . . . . . . . . . 298
Wheels . .. .. .. ............... .. .. .. . 283
C lean ing . . . . . . . . . . . . . . . . . . . . . . . . . . . 307
Glossary of tire and load ing term ino logy . 285
Rep lac ing . . . . . . . . . . . . . . . . . . . . . . . . . . 313
T ire press ure mon itor ing system . . . . . . . 30 1
T ires and veh icle lo ad lim its . . . . . . . . . . . 295
Wheel wrenc h . . . . . . . . . . . . . . . . . . . . . . . . 312
Wi -Fi . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 1
M edia player . . . . . . . . . . . . . . . . . . . . . . . . 185
W indow reg ulator . . . . . . . . . . . . . . . . . . . . . 37
W indows
C lean ing/remov ing ice . . . . . . . . . . . . . . . . 308
Defrost ing . . . . . . . . . . . . . . . . . . . . . . . . . . 71
W indshield
C lean ing . . . . . . . . . . . . . . . . . . . . . . . . . . . . SO
Defrost ing . . . . . . . . . . . . . . . . . . . . . . . . . . 71
also refer to W indshield . . . . . . . . . . . . . . . SO
Windshield was her system . . . . . . . . . . 50, 28 1
Rese rvoir capacity . . . . . . . . . . . . . . . . . . . 334
W indshield w ipe rs . . . . . . . . . . . . . . . . . . . . . 50
W inter operation
Car washes . . . . . . . . . . . . . . . . . . . . . . . . . 306
Cooling system ................ ... .. . 277
D efrost ing t he w indows . . . . . . . . . . . . . . . 7 1
Removing ice from w indows . . . . . . . . . . . 308
Se at hea ting . . . . . . . . . . . . . . . . . . . . . . . . . 7 1
Snow chains . . . . . . . . . . . . . . . . . . . . . . . . 298
Steering whee l heating . . . . . . . . . . . . . . . . 72
Tires . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 298 Zoom (map)
. . . . . . . . . . . . . . . . . . . . . . . . . 173
351