2015 AUDI A6 engine coolant

228 Check ing and filling
- Always dispose of used engine oil proper ­
l y . Do not dump it on garden soi l, wood­
ed areas, into open streams or down
sewage dra ins.
- Recycle used engine oil by taking it to a
used engine oil collection facility in your
area, or contact a service station.
Engine cooling system
Coolant
The engine coolant performs two functions: it
keeps the engine from overheating and it pro­ tects the engine from freezing in the winter.
The cooling system is sealed and generally re­
qu ires little attention.
The cooling system has been filled at the fac­
tory with a permanent coolant which does not need to be changed. The coolant consists of a
mixture of spec ially conditioned water and the
manufacturer's glycol-based coolant addi-
tive G13 antifreeze with ant icorros ion addi­
tives (50% for USA models; 60% for Canadian
models). This mixture both assures the neces­
sary frost protection and protects metal com­
ponents in the engine's coo ling system from
corrosion and scaling . It also raises the boil­
ing point of the coolant.
Do not reduce the concentration of the coo l­
ant in the summer by adding plain water.
The
p ropo rtion of coolant add itive must be at
l e a st 50 % but not mo re th an 60 %
to ma in­
tain antifreeze protection and cooling efficien­
cy . If the coolant frost protect ion is too low,
the coo lant cou ld freeze and damage the veh i­
cle heating and eng ine cool ing system.
For year-round driving, antifreeze is added at
the facto ry for temperatures down to:
- -31°F(-35°C)USA
- -40 °F ( -40 °C) Canada.
If you m ust add coo lant, use a m ix tu re of wa ­
ter and coo lant addit ive . M ixing the coolant
additive with disti lled water is recommended .
A WARNING
Before you check anything in the engine
compartment, always read and heed all
WARNINGS~ &.
in Working in the engine
compartment on page
222 .
(D Note
-Before winter sets in, have the coolant
checked to see if the coolant additive in
your vehicle is sufficient to meet the cli­ mate conditions. This is especia lly impor­
tant if you live in a reg ion where t he win ­
t er is ex treme ly cold. If necessary, in­
crease the p roportion of coo lant add it ive
to 60% .
- When adding coolant addi tive to yo ur
c ooling sys tem, remembe r:
- We recommend us ing on ly coolant ad­
d itive G12++ or G13 (check the label)
for your vehicle . This coolant additive is
ava ilable at autho rized Aud i dea le rs.
Other types of antifree ze ca n sign ifi­
ca ntly reduce co rros io n protec tion. The
res ulting corrosion c an cause a loss of
coolant and serious engine damage.
- Do not add any type of r ad iator le ak seal­
ant to yo ur vehicle 's engine coolant .
Adding radiator repair flu id may adverse­
ly affect the function and performance of
your cooling system and cou ld resu lt in
damage not covered by your New Vehicle Limited Warranty.
Checking the engine coolant level
-
The engine coolant level can be checked with
a quick glance.
F ig. 1 91 Engi ne compartment: cover on the coola nt
expansio n tank

M N
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Before you check anything in the engine com­
partment,
al ways r ead and heed all W ARN­
ING S r=;, A in Working in the engine compart­
ment on page 222.
.. Park your vehicle on a level surface.
.. Switch
off the ignition .
.. Read the eng ine coolant leve l from the cool­
ant expansion tank¢
fig. 191, ¢ page 224,
fig. 188.
With a cold engine, the coolant
level should be between the "min" and
"max" markings. When the engine is warm,
the leve l may be slightly above the "max"
mark ing .
The location of the coolant expans ion tank
can be seen in the engine compartment illus­
tration ¢
page 224.
To obta in an accurate read ing, the engine
must be switched
off.
The expansion tank in your vehicle is equipped
with an electric coolant level sensor.
When the coo lant level is too low, the warning
light in the Auto-Check System
¢ page 16 will
illum inate until yo u add coolant and the level
has been restored to normal. Even though
there is an electric coo lant level sensor, we
still recommend you check the coolant leve l
from time to time .
Coolant loss
Coolant loss may indicate a lea k in the cooling
system. In the event of coolant loss, the cool­
ing system should be inspected immediately
by your authorized Audi dealer . It is not
enough merely to add coola nt.
In a
sealed system, losses can occur only if
the boiling point of the coolant is exceeded as
a result of overheat ing .
A WARNING
The coo ling system is unde r pressure and
c an get ve ry ho t. Reduce the risk of s cald­
ing from h ot coolan t by followi ng these
steps .
- T urn
off the engine and allow it to coo l
down.
Checkin g and fillin g 229
-Protect your face, hands and arms from
escaping flu id and steam by covering the
cap with a large, th ick rag.
- Turn the cap slowly and very carefully in
a counter-clockwise d irect ion while ap­
plying lig ht, downward pressure on the
top of the cap .
- To avo id being burned, do not sp ill anti­
freeze or coolant on the exhaust system
or hot engine parts. Under certa in cond i­
tions, th e ethylene glycol in engine coo l­
ant can catch fire.
(D Note
Do not add any type of radiator leak sea l­
ant to your ve hicle's engine coolant. Add-
i ng radiator repa ir flui d may adverse ly af­
fe ct the funct ion a nd pe rfo rma nce of you r
co oling system and could re sult in damage
not covered by your New Vehicle Limi ted
War ranty.
Adding coolant
Be very careful when adding engine coolant.
Before you ch eck anyth ing in the eng ine com­
partment,
alway s re ad and heed all WARN­
INGS ¢ A in Working in the engine compar t­
ment on page 222.
.. Requirement: The re must be a residua l
amount of coolan t in the expansion ta nk
¢(D .
.. Tu rn off the engine.
.. Let the engine cool down.
.. Place a thick rag ove r th e coo lant expansion
tank
¢ page 228, fig . 191 and carefully
twist the cap counte r-clockwise ¢.&, .
.. Add coo lant m ixed in the correct ratio
¢
page 228, Coolant up to the MAX mark ­
ing .
.. Make s ure that the flu id leve l remains sta-
b le. Add more coo lant if ne cessary.
.. Twis t the cap o n again
t ightly.
Replacement engine coo lant must confo rm to
exact spec ificat ions
r=;, page 228, Coolant. ..,.
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230 Check ing and filling
We recommend using on ly coo lant addi-
tive
Gl2++, Gl3 or in an emergency Gl2 +. Do
not use a different additive . In an emergency
use plain water unt il you can get the correct
additive and can restore the correct ratio. This
should be done as soon as possible .
If you have lost a cons iderable amount of
coolant, then you should add co ld antifree ze
and cold water only when the engine is co ld.
A lways use
new engine coolant when refilling.
Do not fill coolant above the "MAX" mark. Ex­
cess coolan t will be forced out through the
p ressure relie f valve in the cap when the en ­
gine becomes hot.
A WARNING
- The coo ling system is under press ure and
can get very hot. Reduce the risk of
sca lding from hot coolant by following
these steps.
- Turn off the eng ine and a llow it to cool
down.
- Protect your face, han ds and arms from
escap ing fl uid and steam by cover ing
the cap with a large, thick rag.
- Tur n the cap slowly and very c arefully
in a counter-clockwise d irect ion while
applying light, downward press ure on
the top of the cap .
- To avo id being burned, do not sp ill an ­
tifreeze or coolant on the exhaust sys ­
tem or hot engine parts. Under certain
conditions, the ethylene glyco l in en­
g ine coolant can catch fire.
- Antifreeze is poisonous. Always store an­
t ifreeze in its or iginal container and well
out of the reach of children.
- If you drain the coolant, it must be
caught and safely stored in a proper con­
tainer clear ly marked "poison".
- Do not add coolant if the expansion tank
is empty. A ir could enter the cooling sys­
tem and damage the eng ine. If this is the case, do not cont
inue driving . Seek
professiona l assistance .
- Coo lant poll utes the environmen t and
co uld cause an engine fire . Excess cool­
ant will be forced out thro ugh the pres­
sure relief valve in the cap when the en­
gine becomes hot.
- If, in an eme rgency, only wate r can be
added, the correct ratio between water
and antifreeze
c::> page 228 must be re­
stored as soon as possible .
@ For the sake of the environment
Drained coolant should not be reused . A l­
ways d ispose of used coolant while observ­
i ng all environmental regulations .
Radiator fan
The radiator fan switches on automatically by
itself.
An a uxiliary electric radiator fan switches on
and off depending on coolant temperature
and other vehicle operat ing condit ions .
After yo u switch the engine off, the auxi liary
fan can continue r unning for up to 10 minutes
- even w ith the ignition off . It can even switc h
on again later by itself
c::> .& , if
- the temperature of the engine coo la nt rises
due to the heat build- up from the engine in
the engine compartment, or
- the engine compa rtment heats up because
the vehicle is parked in intense sunlight.
A WARNING
- To reduce the risk of personal injury nev­
er touch the radiator fan.
- The a uxiliary electric fan is temperat ure
controlled and can sw itch on suddenly
even when the engine is not ru nning .
- The a uxiliary radiator fan sw itches on a u­
tomatically when the engine coo lant
reaches a certai n temperature and will
continue to run until the coolant temper­
ature drops.

236 Checking and filling
The washer fluid container is marked with the
symbol$ on its cap
¢ fig . 194, ¢page 224,
fig. 188 .
.,. Before you check anything in the engine
compartment,
always read and heed all
WARNINGS ¢ A in Working in the engine
compartment on page
222 .
.,. Lift the filler cap tongue to add washer flu­
id . You can fill the container to the top .
.,. Press the cap back onto the filler neck after
filling the container .
You can find the reservoir
capacity in the table
in¢
page 290.
C lean water sho uld be used when filling up. If
possible, use soft water to prevent sca ling on
washer jets. Always add a glass cleaner solu­
tion (with frost protection in the winter).
Do not mix engine coolant antifreeze or
any other additives to f ill up the wind­
shield washer reservoir.

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Technical data
Vehicle identification
F ig. 227 Veh ide Identificat ion Number (VlN) plate: lo ·
c ation on d river 's s ide das h pane l
XXXXX XX · X -XXXX XXX
~ fAllftlli. -llllll · NR. ~ W!ru -IIOO -NO.
xx
XXXX XXXX XX X XXXXXXXX
XXX XXX
IYP /TYPE
XX XXXXXXX XX X X XX
XXX KW XXX
®i ~W.::·f :l~~ XXXX XXX XXX
©+ ::rw= xxxx I xxxx XXX I xx
M. · AUSSt I IJ'IIDIIS
~--
EOA 7D 5 4UB 6XM SSG SRW
2E H JOZ 1LB lA S 18A
3FC SMU 7X l
FD A 9G3 OG7 OYH OJF
TL6 3 KA 8EH UlA X98 027
lXW 803 908 824 D2D
7T6 CV7 7KO 4X3 2K2
3L4 4KC 3YO 413 502
1S A 7GB 01A 4GO
XX. X XX X XX X XXXX
Fig. 228
The vehicle identification label - inside the
luggage co mpartment
Vehicle Identification Number (VlN)
The Veh icle Identification Number is located
in different p laces :
- under the w indshield on the driver's side
¢fig. 227.
- in the MMI: Select: Function button ICAR ! >
(Car)* systems> Servicing & checks > VIN
number.
- on the vehicle identification label.
Techni cal data 289
Vehicle identification label
The vehicle identification label is located in
the luggage compartment in the spare wheel
well.
T he label¢
fig. 228 shows the following vehi­
cle data :
(D Vehicle Identificat ion Number (VIN)
@ Vehicle type, engine output, transmission
® Engine and transmission code
© Paint number and interior
® Optional equipment numbers
The information of the veh icle identification
label can also be found in your Warranty
&
Maintenance booklet .
Safety compliance sticker
The safety compliance sticker is your assur­
ance that your new veh icle complies with all
applicable Federal Motor Vehicle Safety
Standards which were in effect at the time the
vehicle was manufactured . You can find this
sticker on the door jamb on the driver's side. It shows the month and year of production
and the vehicle ident ification number of your
vehicle (perforation) as well as the Gross Vehi­
cle Weight Rating (GVWR) and the Gross Axle
Weight Rating (GAWR) .
High voltage warning label
The high voltage warning label is located in
the engine compartment next to the engine hood release. The spark ignition system com­
plies with the Canadian standard ICES-002 .
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 s ide.
The Gross Vehicle Weight Rating includes the
weight of the basic vehicle plus full fuel tank,
oil and coolant, plus maximum load, which in ­
cludes passenger we ight (150 lbs/68 kg per
II>--

29 4 Con sum er Inf ormation
-Always make sure the transmission se­
lector lever (automatic transmiss ion) is
in P (Park position) and the park brake is
applied .
@) For the sake of the environment
-Changing the engine settings wi ll ad­
versely affect em iss ion levels. This is det­
rimental to the environment and increas­
es fuel consumption .
- Always observe env ironmental regula­
tions when dispos ing of old engine oil,
used brake fluid, dirty engine coolant,
spent batteries or worn out tires.
- Undeployed airbag modules and preten­
s ioners might be classified as Perchlo ­
rate Material -spec ial handling may ap­
ply, see www.dtsc.ca .gov/hazardous­
waste/perch lorate . When the veh icle or
parts of the restraint system including
airbag modules safety belts wit h preten ­
sioners are scrapped, all applicable laws
and regulations must be observed. Your
authori zed Aud i dea ler is familiar with
these requirements and we recommend
that you have your dealer perform this
serv ice for you .
Additional accessories,
modifications and
parts replacement
Additional accessories and parts
replacement
Always consult an authorized Audi dealer be­
fore purchasing accessories.
Your veh icle incorporates the latest safety de­
sig n featu res ensu ring a high standard of ac­
tive and passive safety .
This safety could be compromised by non-ap­ proved changes to the veh icle. For this reason ,
if pa rts have to be replaced , please observe
the following points when install ing addition­
a l accessories: Approved Audi accessories and genuine Aud
i
parts are available from authorized A udi deal­
ers.
T hese dea le rs a lso have the necessary facili­
ties, tools and trained specialists to install the parts and acc essories proper ly .
A WARNING
-Using the wrong spare parts or using non-
approved accessories can cause damage to
the veh icle and ser ious persona l injury.
- Use on ly accessories express ly approved
by Audi and gen uine Audi spare parts
- These parts and accessories have been
specia lly designed to be used on yo ur ve­
h icle .
- Never install accessor ies such as tele­
phone crad les or beverage ho lders on a ir­
bag covers or within the airbag deploy­
ment zones . Do ing so will increase the
risk of injury if a irbags are triggered in an
accident!
- Before you check anything in the engine
compa rtment, always read and heed a ll
WARNI NGS
9 page 222 .
(D Note
-If items other than genu ine Audi spare
parts, add-on equipment and accessory
items are used or if repair work is not
performed accord ing to specified meth­
ods, this c an resu lt in seve re damage to
your vehicle's eng ine and body (such as
corrosion) and adversely affect yo ur vehi ­
cle's warranty .
- If emergency repairs must be performed
elsewhere, have the vehicle examined by
an authorized A udi dealer as soon as
possible .
- The manufacturer cannot be held liable
for damage wh ich occ urs due to failure
to comply with these stipu lations.

A
A/C (automatic climate control) .... .. .. 70
A/C (climate control) . . . . . . . . . . . . . . . . . 68
Accessories .. ............. .... .. .. . 294
Active lane assist . . . . . . . . . . . . . . . . . . . . 93
Activating and deactiva ting . .. .. .. .. .. 94
C leaning the camera area ... ... .. .. . 2 10
Descript ion ...... ..... ... ... ... .... 93
Instrument cluster indicator light . . . . . 94
Messages . . . . . . . . . . . . . . . . . . . . . . . . . 94
Notes on instrument cluster display .. .. 94
Sett ing the steering wheel vibrat ion .. .. 95
Adaptive a ir s uspension/sport . ... .. .. . 100
Adapt ive cruise control . . . . . . . . . . . . . . . . 84
C lea ning the sensor ....... .. .. .. .. . 210
Messages .. ............. .... .. .. .. 91
Request for driver intervention . . . . . . . . 89
Stop-and-go traffic . . . . . . . . . . . . . . . . . 88
Adapt ive Lig ht (defective) ... .. .. .. .. .. 22
AdBlue .. .. .. ................. .. ... 218
F il ling . .. .. ................. .. ... 220
Messages in the instrument cluster dis -
play . .. .. .. .. ........ ... .. ... ... . 219
Adding Eng ine coolant ........... .... .. .. . 229
Eng ine oil .. .. ........... .. .. .. ... 226
W indshield washer fluid ....... ... .. 235
Addit ives
E ng ine oi l .. ............. .... .. ... 226
Adj usti ng
A ir dist ribution (au toma tic climate con-
trol) ... .. .. .. .... .. .... ... .. .. .... 71
air distribution (cl imate control) ... .. .. 68
Front seats . . . . . . . . . . . . . . . . . . . . . . . . 52
Instrument illum inat ion ... .. .. .. .. .. 46
Steer ing colum n elec trically .. .. .. .. .. 73
Steer ing colum n manually . .. .. .. .. .. 73
Temperature (automat ic climate co ntrol) 71
Temperature (climate control) .. ... ... 68
Airbag system . . . . . . . . . . . . . . . . . 145, 166
Advanced Airbag System ... .. .. .. .. . 149
Advanced Airbag System components . 153
Care ...... ... ................ .... 161
M N Chi ld ren ... ... .. .. ...... .. .. .. .. . 173 0
~ Chi ld restra ints ........... .. .. .. ... 173
~ Components (front airbags) .. .. .. .. . 153 1.1"1 ,...., 1.1"1 ,....,
Inde x 297
Danger of fitting a ch ild seat on the front
passenger seat ..... . ... ...... ... .. 147
•
Disposa l .. .. .. .. .. . .. ... .... ... .. 161 •
Front a irbags . . . . . . . . . . . . . . . . 149, 151
How do the front airbags work? .... .. 155
How many a irbags does my vehicle
have? .. .. .. .. .. .. . .. .... .... .... 153
How the Advanced Airbag System com-
ponents work togethe r ......... .... 155
Impo rtant sa fe ty instru ctions on the
knee airbag sys tem ... .. .... ... .. .. 164
Important t hings to know . . . . . . . . . . . 145
Knee airbags ... .... . ... ...... ... .. 162
Monitoring .. .. .. ................. 157
PASSENGER AIR BAG OFF light ..... .. 158
Repairs ... .. .. .. .... ............. 161
Safety instructions .. .............. . 160
S ide a irbags ... .. .. . .. .... .... .. .. 164
S ide curtain airbags . ... ..... ... .... 167
Warning/ind icator lights ........ .. .. . 19
Warning/Indicato r lights ....... .. .. 157
When must t he system be inspected? 157
A ircraft
Transpo rting your vehicle 287
A lcantara
Cleaning .. .. .. .. ................. 212
A ll-wheel drive .. .... . ... ...... ... .. 197
Winter tires ..... .. . .. .. ..... ... .. 264
Alternato r . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Amb ience lighting . ................. . 46
Anti -freeze
refer to Engine coolant . ..... ... .. .. 228
Anti- lock b raking system ............ . 193
Warning/ind icator lights ........ .. .. . 19
Anti-slip regu lation .. ........... .... 193
Warning/ind icator lights .. .. ... ... .. . 19
Anti-theft systems Electronic immobi lizer ....... ... .. .. . 32
Asht ray .... .. .. .. .. . ............... 58
Audi braking guard
refer to brak ing guard ............. .. 84
Audi drive select
refer to drive select ... ............. 100
A udi Se rv ice Repair Manuals and Liter a-
tu re .. ... .. .. .... .. . .. ... .... ... .. 292

M N
0 <.J 'SI: ,...., \!) 1.1'1 ,...., 1.1'1 ,....,
Checking Engine coolant leve l .... ... .. .. .. .. . 228
Tire pressure . ... ...... ... .. .. .. .. . 249
Ch ild restra ints
D anger o f using ch ild restra ints in the
front seat . . . . . . . . . . . . . . . . . . . . . . . . 147
Where can I get additiona l information
about child restra ints and their use? .. 189
Ch ild restra int system anchors . .. .. .. . 185
Ch ild safety .. ............. .... .. ... 171
Convertible locking retractor . . . . . . . . . 182
Important safety instructions fo r us ing
ch ild safety seats . . . . . . . . . . . . . . . . . . 17 5
I mportant th ings to know when dr iv ing
wi th ch ild ren ............ .... .. ... 17 1
Tet her anchors . ... .... ... .. .. .. ... 188
Tether straps .. .. ..... ... .. .. .. ... 188
C hi ld safety lock
R ear doors . .. ........... .. .. .. .... 39
Ch ild safety seats .......... .... .. ... 177
Booster seats ............... ... ... 180
Convertible c hild seats .... .. .. .. .. . 178
Convertible locking retracto r .. .. .. .. . 182
H ow do I proper ly in stall a child safety
seat inmyvehicle? ........ .. .. .. .. . 175
I nfant sea ts . .... ..... ... .. .. .. ... 177
I nstall ing . ... .... .... ... .. .. .. ... 182
I nstal ling a child restraint using the
LATCH system . . . . . . . . . . . . . . . . . . . . . 187
LATCH system . . . . . . . . . . . . . . . . . . . . . 187
Lower anchorages ........ .. .. .. .. . 186
Mounting and releasing the anchorage
hook .. .. .. .. ........ ... .. ... ... . 187
Safety ins tructions ........ .. .. .. .. . 17 5
Unused safety belts on the rea r seat . . 177
Cigarette lig hter . . . . . . . . . . . . . . . . . . . . . 58
C leaning .... .... ...... ... .. .. .. ... 209
Climate control Air vents . .. ............. .... .. .. .. 69
Climate controls . . . . . . . . . . . . . . . . . . . . . 67
Climate con trol sys tem
Supp lementary heater . . . . . . . . . . . . . . . 72
Climate con trol (four-zone)
Opera tion . . . . . . . . . . . . . . . . . . . . . . . . . 70
Climate control (three-zone) Operation . . . . . . . . . . . . . . . . . . . . . . . . . 68
Clock ..... .. .. ... .. ..... ... .. .. .... 27
Inde x 299
Closing
Sliding/ti lting s unroof ... .... ... .. .. . 40
Cold tire infla tion p ress ure ............ 24 4
Coming home . .. .. ................. . 45
Compac t spa re tire ... . ... .... ... .. .. 271
Compartments . . . . . . . . . . . . . . . . . . . . . . 59
Compliance ... .. .. .. . .. ... .... ... .. 295
Consumer Informa tion . . . . . . . . . . 134, 292
Consumption (fuel) .. . ... .... ... .. .. . 25
Contacting NHTSA .... .. ..... ... .. .. 134
Controls Cleaning .. .. .. .. ................. 211
Convenience key . .. .... ............. . 35
Starting the engine . ................ 74
Stoppi ng the eng ine (START ENGINE
STOP button) .. .. .. ..... ........... 75
Swi tch ing t he igni tion on ....... ..... 74
Un locking and loc kin g veh icle .... .. .. . 35
Convertib le child safety seats ......... 178
Convertib le loc king retractor
Activating ... .... .. . .. ... .... ... .. 184
Deactivating . .. .. ............... .. 184
U sing to secure a child safety seat 1.82, 184
Coolant
refer to Eng ine coolant . ..... ... .. .. 228
Cooling mode (automat ic climate cont rol) 70
Cooling mode (climate control) . . . . . . . . . 68
C ruise cont ro l
Changing speed .. .. . ... .... ... .. .. . 82
Presetting your speed .. ..... ... .. .. . 83
Switching off .. .. .. ............... . 83
Switch ing on . .. .. .... ........... .. . 82
Warning/ind icator lights ............. 23
( upholder . ... .... .. . .. .. ..... ... .. . 59
Cu rve light ........ .. ..... .......... 100
Cylinder management
refer to Cylinder on demand System 2S
Cylinder on demand System ... ... .. .. . 2S
D
Data recorde r ... .. .. . .............. 192
Date d isp lay .... .. .. . ............... 27
Daytime runn ing lights . .. ..... ... .. .. . 43
Decla rat io n of compliance
Adaptive cruise cont rol ......... .. .. 29S
A udi side ass ist .. .. ........... .... 29S
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