engine AUDI A6 2017 Repair Manual

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" N .... 0 0 <..:l ' -If you have the im pression your engine con­
sumes excessive amounts of oil, we recom­
mend that you cons ult your Audi dealer to
have the cause of your concern properly di­
agnosed. Keep in mind that the accurate
measurement of oil consumption requires
great care and may take some time. Your
A udi dealer has instructions about how to
measure oil consumption accurate ly.
Checking the engine oil level and adding
engine oil
The engine oil level can be checked in the Info­
tainment system
Fig. 183 Eng ine compartment : eng ine oil filler opening
cover
Obse rve the safety precautions¢ &. in Working
in the engine compartment on page 198 .
Checking the engine oil level
.,. Park the vehicle on a level surface.
.,. Shut the engine off when it is warm. Wait ap­
prox imately two m inutes so that the engine oil
can flow back in to the oil pan .
.,. Switch only the ignition back on.
.,. Se lect: the
ICARI function button > (Car )* Sy s­
tems
control button > Service & checks > Oil
le vel.
.,. Read the oil level in the Infota inment system.
Add engine oil if the bar in the oil level indica­
tor is just before "min".
Adding engine o il
.,. Turn the engine off.
.,. Unscrew the engine oil filler opening cap
"t!:r.
¢fig.183, ¢page 201, fig.182.
.,. Carefully add 0.5 quart (0.5 liter) of the correct
o il
¢ page 201.
Check ing and Filling
.,. Close the engine oi l filler open ing cap "t!:r. .
.,. Close the hood, restart the ignition after two
m inutes and read the current o il leve l in the In­
fotainment system.
A WARNING
-When adding oil, do not let oi l dr ip onto hot
e ngine components. This increases the risk
of afire.
- You must seal the cap on the oil filler open­
ing correctly so that oi l does not leak ou t
onto the hot engine and exhaust system
when the engine is runn ing, be ca use this is
a fire hazard.
- Always clean sk in thoro ughly if it comes into
con ta ct w ith eng ine oi l.
d) Note
-The e ngine o il level must not be under the
"min" marking, beca use this increases the
r is k of engine damage.
- If the message
Oil level is too full. Pleas e
reduce
oil level. appea rs, the re is too m uch
oil in the engine and the re is a r is k of cata­
lyt ic converte r and engine damage. Do no t
start the eng ine. Co ntact an a uthorized Audi
dea ler or authorized Audi Service Facility to
have excess engine oil extracted if necessa­
ry.
-Do not mix any ad ditiona l lubricants into
the engine oil. Damage caused by such add i­
tives is not covered by the warranty .
@ For the sake of the environment
- Oil sho uld never enter the sewer system or
come into contact with the ground .
- Pay attention to lega l req uiremen ts when
disposing of empty oil containers .
(D Tips
- T he oil level in dicator in the inst rumen t
cl uster display is only an informationa l dis ­
play. If the o il level is too low, a minim um
oil warn ing appears in the instrument clus­
ter. Add oil and close the hood. The c urrent
oil level is d isplayed in the Infotainment
203

Checking and Filling
system the next time the ignition is
switched on.
- The engine oil consumption may be up to
0.5 quart/600 miles (0.5 liter/1 ,000 km),
depending on driving style and operating
conditions . Consumption may be higher
during the first 3,000 miles (5,000 km). Be­
cause of this, the engine oil level must be
checked regularly .
It would be best to check
each time you refuel your vehicle and before
long drives .
Changing the engine oil
We recommend that have your oil changed by an
authorized Audi dealer or a qualified service sta­
tion.
Before you check anything in the engine compart ­
ment ,
always read and heed all WARNINGS q .&.
in Working in the engine compartment on
page 198.
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 oil 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 conditions, 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 time. This is normal and is not a reason to
chang e the oil more often than recommended.
Because of the problem of proper disposal, along
with the special tools and necessary expertise re­
quired, we strongly recommend that you have
your oil changed by an authorized
Audi dealer or
a qualified service station .
If you choose to change your oil yourself, please
note the following important information:
204
A WARNING
-
To reduce the risk of personal injury if you
must change the engine oil in your vehicle
yourself:
- Wear eye protection.
- To reduce the risk of burns from hot engine
-
oil, let the engine cool down to the touch .
- When removing the oil drain plug 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 oil is
harmful to your skin . Always protect your
skin by washing oil off thoroughly with soap
and water.
(D Note
Never mix oil additives with your engine oil.
These additives can damage your engine and
adversely affect your Audi Limited New Vehi­
cle Warranty.
@ For the sake of the environment
- Before changing your oil, first make sure you know where you can properly dispose of
the used oil.
- Always dispose of used engine oil properly .
Do not dump it on garden soil, wooded
areas, into open streams or down sewage
drains.
- Recycle used engine oil by taking it to a used
engine oil collection facility in your area, or
contact a service station .
Cooling system
Coolant
The engine cooling system is filled with a mixture
of purified water and coolant additive at the fac-
tory. This coolant must not be not changed. ..,.

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The coolant leve l is monitored through the. in­
dicator light
c::> poge 14. However, we do recom­
mend occasionally check ing the coo lant level
manually.
If you m ust add coolant, use a m ixture o f water
and coolant additive . M ixing the coolant additive
w ith d istilled water is recommended.
Coolant additive
The coolan t addi tive is made of ant i-freez ing and
corrosion protection agents. Only use the fo llow­
i n g coo lant additives . These additives may be
mixed wit h each other .
Coolant additive Specification
Gl3 TL774J
Gl2++ TL 774 G
The amount of coo lant add itive that needs to be
mixed with water depends on the climate where
the veh icle will be ope rated. If the coolant addi­
tive percentage is too low, the cool ant can freeze
and damage the engine.
Coolant Freeze protec-
additive tion
Warm regions min . 40% m
in. -13 ° F
max. 45% (-25 °C)
Cold regions min . 50% max . -40 °F
max . 55% (-40 °C)
(D Note
-
Befo re the start of winter, have your author­
i zed Audi dealer or author ized Audi Se rvice
Facility check if the coolant additive in yo ur
vehicle ma tches the percen tage approp riate
fo r th e climate. This is especially import ant
whe n driving in co lder climates .
-If the approp ria te coolant addi tive is no t
available in an emergency, do no t ad d any
other additive. You co uld damage the en­
gine. If this happens, only use wate r and re­
store the correct mixture ratio with the
spec ified coolant additive as soon as possi­
ble.
- Only refill with new coo lant .
- Radiator sealant must not be mixed with
the coo lant .
Checking and Filling
Adding coolant
Fig. 184 En g in e compa rtment : coo lant expa nsion ta nk
cove r
Observe the safety prec autions c::> A in Working
in the engine comportmen t on page 198.
Checking the engine coolant level
Park the vehicle on a level surface.
.,. Switch t he ignit ion off.
.,. Read the coolant level on the coolant expansion
tank
c::> page 201, fig . 182. The coolant level
must be between the MIN and MAX mark ings
when the engine in cold. When the eng ine is
warm it can be slightly above the MAX marki ng.
Adding coolant
Requirement: there must be a residua l amount of
coolant in the expansion tank
c::> (D .
.,. Let the eng ine cool down .
.,. Place a cloth over the coolant expansion tank
cap and unscrew the cap counterclockw ise
c::> .&_ .
.,. Add coo lant m ixed in the cor rect rat io
c::> page 204 u p to the MAX mark ing.
.,. Ma ke sure that the f luid level remains stab le.
Add mo re coolant if necessary.
.,. Close the cap sec urely.
Coo la nt loss usually i ndicates there is a lea k. Im­
med iate ly drive you r ve hicle to a n author ized
Audi dealer or authorized A udi Se rvice Faci lity
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 out of the cooling system.
205

Checking and Filling
_& 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
Fig. 185 Engine compartment : ca p on brake fl uid re servoir
Observe the safety precautions c::> .&. in Working
in the engine comportment on page 198.
Checking the brake fluid level
• Read the brake fluid level on the brake fluid
reservoir
c::> page 201, fig . 182. The brake fluid
level must be between the MIN and MAX mark­
i n gs c::> .,&. .
The brake fluid level is monitored automatically .
206
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
c:::, &.
The term "vehicle battery" refers to the 12 Volt
battery in your vehicle.
Detailed warnings for the vehicle battery:
®) Wear eye protection.
~ Battery acid is highly corrosive. Wear pro-
~ tect1ve gloves and eye protection. ..,.

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@
Fire, sparks, open flame and smoking are
forb idden.
~
A highly explosive mixture of gases can
form when charging batteries.
®
Keep children away from battery acid and
batteries.
A WARNING
All work on the battery or electrical system in
your vehicle can result in injuries, chemical
burns, accidents or burns. Because of this, all
work must be performed
only by an author­
ized Aud i dealer or authorized Aud i Service
Facility.
A WARNING
California Proposition 65 Warning:
- Battery posts, terminals and related acces­
sories contain lead and lead compounds,
chemicals known to the State of California
to cause cancer and reproduct ive problems.
Wash hands after handling.
(D Note
Protect the vehicle battery against freezing if
the vehicle will be parked for long periods of
time so that it is not destroyed by "freezing"
c:>page207.
@ For the sake of the environment
~ Batteries contain poll uting substances such
as sulfuric acid and lead. Contact an author­
ized Audi dealer or authorized Audi Service
Facility for more information.
Vehicle battery
The term "vehicle battery" refers to the 12 Volt
battery in your vehicle.
Not running the vehicle for long periods of
time
If you do not drive your vehicle for several days or
weeks, e lectrical equipment is gradually scaled
back or switched off. This reduces energy use and
ensures the veh icle will be able to start after long
periods of time
c:> page 124. Some convenience
Checking and Filling
functions, such as interior lighting or power seat
adjustment, may not be available under certa in
c ir cumstances. These convenience functions will
be available again once you switch the ignition on
and start the engine .
Even when electrical equipment is switched off,
the equipment can still dra in the vehicle battery
if the vehicle is not driven for long periods of
time . Deep draining results in a chemical reaction
that destroys the inside of the vehicle battery .
T he veh icle battery must be charged every month
to reduce the risk of this happening
c:> page 207 .
Contact an authorized Aud i dea ler or authorized
A udi Service Facility for more information .
Winter operation
Cold weather places higher demands on the vehi ­
cle battery . This results in reduced starting abili­
ty. Have the veh icle battery checked by an au­
thorized Audi dea ler or authorized Audi Service
Facility before the cold time of year.
Charging the vehicle battery
Fig. 186 En g in e compa rtment: co nnectors for a cha rge r
and ju mp start cables
Requirement: only use chargers with a maximum
charging voltage of 30 amps/14.8 Volts.
The
vehicle battery cables remain connected .
.,. Read the warnings
c:> &. in General warnings
about batteries on page 207
and ¢ &_ .
.,. Switch off the ignit ion and all electrical equ ip­
ment.
.,. Open the hood
c:> page 200.
"'Open the red cover on the pos itive terminal
c:> fig. 186 .
207

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" N .... 0 0 <..:l ' inst rument cl uste r display eac h time t he ig ni­
t io n is switc hed on or
off . The rema ining dis­
tance or time is displayed br ie fly .
- Inspection or oil change due: if your vehicle
has reac hed an inspection o r oi l change interval
o r both intervals at the same time, the mes­
sage
Inspection due! or Oil change due! or Oil
change and inspection due!
appears briefly af ­
te r swi tching t he igni tion on/off .
Checking service intervals
You can check t he rema ining distance o r time un­
til the ne xt oil change o r next inspection i n the
Ca r menu. To do this, select: t he
IC A RI fu nction
b utton
> (Car) * Systems cont rol b utton > Service
& checks > Service intervals.
Resetting the indicator
Your author ized Audi dealer or author ized A udi
Service Faci lity will reset the service interval dis­
p lay after pe rforming service.
I f yo u h ave cha nged t he oi l you rsel f, you must re­
set t he oil change in terva l.
To reset the indic ator, se le ct : th e
ICAR I fu nct ion
bu tton
> (Car) * Systems con trol button > Service
& checks > Service intervals. Tur n t he control
k nob downward to
Reset oil change interval and
p ress the cont rol knob.
- Only reset the oil ch ange in dicato r if the oil
was c hanged .
- Fo llow in g th e service i nte rv a ls is critical to
mai ntai ning th e service life a nd value o f
you r vehicle, especia lly t he engine. Even i f
t h e m ileage on the vehicle is low, do not ex ­
c e ed th e tim e for the n ext serv ic e .
- Calcu latin g the t ime to the next o il chan ge
i s interrupted w hen the ve hicle battery is
discon nect ed
c:> page 235.
Checking and Filling
209

Wheels
Model/ Tire designation Tire pressure
Engine Normal load Maximum load
(up to 3 people)a >
front rear front rear
PSI
AG: 225/55 Rl 7 97H
32 2.0L All Season
4 cylinders 245/45 Rl8 l00H
33
All Season
255/40 Rl9 l00H
33
All Season
255/40 Rl9 l00Y
32
High Performance
255/35 R20 97Y
35
High Performance
AG: 225/55 Rl 7 97H
35 3.0L All Season
G cylinders
245/45 Rl8 l00H
35
All Season
255/40 Rl9 l00H
35
All Season
255/40 Rl9 l00Y
36
High Performance
255/35 R20 97Y
39
High Performance
56 : 255/40 Rl9 l00Y
39 4.0L High Performance
8 cylinders
255/35 R20 97Y
44
High Performance
a) 2 people in the front, 1 person in the rear
_&. WARNING
Please note the important safe­
ty precautions regarding tire
222
kPA PSI kPA PSI kPA PSI kPA
220 29 200 35 240
38 260
230 32 220 35 240
38 2
60
230 32 220 35 240
38 2 60
220 32 220 33 230 36 250
240 32 220 38 260 41 280
240 32 220 38 260 41 280
240 32 220 38 260 4 1 280
240 32 220 38 260 41 280
25 0
33 2
30
39 27
0 42 2 90
270 36 250 44 300 46 320
270 35 240 42
290 4
4
300
300 39 2
70 46 320 48
330
pressure ¢ page 220 and load
limits¢
page 223.

Emergency assistance
Emergency assistance
General information
... Park the vehicle as far as possible from moving
traffic in the event of a breakdown. In the event
of a flat tire, park the vehicle on a level surface .
It you are on a steep hill, be especially careful.
.,. Set the parking brake .
.,. Switch the emergency flashers on .
... Set up the warning triangle
r=;, page 236 .
... Have the passengers exit the vehicle . They
should move to a safe place, for example be­
hind a guard rail.
A WARNING
Follow the steps given above. This is for your
protection and the for the safety of other driv­
ers.
Equipment
Warning triangle
A ppl ies to: ve hicles w ith warning triangle
Fig. 193 Luggage co mpartment lid : wa rnin g triangle
The warning triangle placed in the vehicle at the
factory is located in the luggage compartment.
... To remove the warning triangle, press the re-
tainer in the direction of the arrow
r=;, fig . 193
and fold the holder down.
The luggage compartment lid is only designed to
hold the warning triangle offered by the Audi
Genuine Accessories program.
236
Vehicle tool kit
Fig. 194 Luggage compartment: vehicle tool kit
The vehicle tools and vehicle jack* are stored in
the luggage compartment under the floor cover.
... Lift the cargo floor by the plastic handle.
.,. Hook the handle into the luggage compartment
weather strip.
.,. Turn the handle counter-clockwise and remove
the cover or the spare tire* .
.,. Unhook the cargo floor before closing the rear
lid .
A WARNING
Improper use of the vehicle jack can cause se­
rious personal injuries.
- Never use the screw driver hex head to
tighten wheel bolts, since the bolts cannot
attain the necessary tightening torque if yo u
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 risk injuring
yourself.
- Never start the engine when the vehicle is
raised, which cou ld cause an accident .
- Support the vehicle securely with appropri­ ate stands if work is to be performed under­
neath the vehicle; otherwise, there is a po­
tential risk for injury .
- Never use the jack supplied with your Audi
on another vehicle, particularly on a heavier
one. The jack is only su itable for use on the
vehicle it came wi th.

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The vehicle jack* in your vehicle is mainte­
nance-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 failure, pull the car
well away from moving traffic and try to reach
level ground before you stop¢,&. .
.,. All passengers should
leave the car and move
to a safe location (for instance, beh ind the
guardrail)¢ ,&..
.. Engage the
parking brake to prevent your vehi­
cle from rolling unintentionally ¢,&. .
.. Move
selector lever to position P ¢ ,&. .
.,. If you are towing a trailer, unhitch the trailer
from your vehicle.
.,. Take the
jack and the spare tire* out of the lug­
gage compartment c:> page 236.
A WARNING
You or your passengers could be inju red wh ile
changing a wheel if you do not follow these
safety precautions:
- If you have a flat tire, move a safe distance
off the road. Turn off the engine, turn the
emergency flashers on and use other warn ­
ing devices to alert other motorists .
- Make sure that passengers wait in a safe
place away from the vehicle and well away
from the road and traffic.
- T o help prevent the vehicle from moving
sudden ly and possibly slipping off the jack,
always fully set the parking brake and block
the wheel diagonally opposite the wheel be­ ing changed. When one front wheel is lifted
off the ground, plac ing the Automatic
Transmission in P (Park) will
not prevent the
vehicle from mov ing.
- Before you change a wheel, be sure the
ground is level and firm. If necessary, use a
sturdy board under the jack .
Emergency assistance
-Always store the vehicle too l kit, the jack
and the replaced tire in the luggage com­
partment
¢page 134.
@ Tips
Before changing the wheel, you must activate
the jacking mode, so that the automatic con ­
tro ls for the Adaptive Air Suspension* do not
make it more difficult to lift the vehicle with
the jack
c> page 239.
Changing a wheel
When you change a wheel, follow the sequence
described below step-by-step and in exactly that
order .
l. Activate the vehicle jack mode* ¢ page 239 .
2. Remove the decorative wheel cover* or the
wheel bolt caps* . For more details see also
¢ page 238, Decorative wheel covers or
¢ page 238, Wheels with wheel bolt caps .
3. Loosen the wheel bolts¢ page 238 .
4. Locate the proper mounting point for the
jack and align the jack below that point
¢page 239.
5. Raise the car with the jack c> page 239 .
6. Remove the wheel with the flat tire and then
install
the spare ¢ page 241.
7. Tighten all wheel bolts lightly.
8.
Lower the vehicle with the jack .
9 . Use the wheel bolt wrench and
firmly tighten
all wheel bolts
c> page 238.
10. Replace the decorative wheel cover* or the
wheel bolt caps*.
11. Deactivate the vehicle jack mode* in the
MMI:
I CARI function button > ( Car)* systems
control button > Servicing & checks > Air
susp.: jack mode > Off.
The vehicle jack mode* switches off automatica l­
ly at speeds above 6 mph (10 km/h).
A WARNING
--
Always read and follow all WARNINGS and in­
formation
¢ .&. in Raising the vehicle on
page 240
and c> page 242 .
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Driver side cockpit fuse
assignment
Fig. 205 Drive r side cockp it : fuse panel w ith plastic bracket
Fuse panel @ (black)
No. Equipment
Electromecha nica l powe r steering, trailer
1 hitch,
ionizer, switch strip, seat heating
(rear), electromechan ica l park ing brake
Horn, climate con trol system, Gateway,
2 automatic
dimm ing in ter ior rearview mir-
ro r, On-Board Unit
4 Park ing aid, headlight range adjustment
5
Dynamic steering, E lectron ic Stabilization
Control (ESC)
6 Headlights
7 Adapt ive cruise control
8 Front passenger's seat sensors, airbag
9 Gateway
10 Engine
sound, night vision ass ist, garage
door opener (Homelink), parking aid
11 Video camera
image processing
12 Headlights
13 Steering column sw
itch module
Fuses
Fuse panel @ (black)
14 Termina l 15 (luggage compartment)
15 Starter
Fuse panel @ (brown)
No. Equipment
1 Infotainment system
2 Infotainment system
3 Front
passenger's seat
5
Airbag, Electronic Stabilization Control
( ESC )
6 Anti
-theft alarm system
7 Electromec hanical pa rking brake
8 Inter io r li ghts
9
Windshield video camera heating, light/
rain sensor
10 Lumba r support (driver's seat)
11 Driver
's seat
12 Electronic sta bilization control
13 Horn
1 4 Headlights
15 Front seat heating
16 Dynamic steering
Fuse panel © (red)
No. Equipment
1 C lutch peda l
2 Fuel pump
3 Brake
light sensor
4 AdB lue (diese l engine)/engine aco ustics
5 Rear
door
6 Fro
nt door
7 Electronic stabilization control
8 Windshield wip er motor
9 Headlight washer system
10 Interio
r lighting, climate control system
1 1 Headlights
12 Sunroof
245