engine AUDI A6 2018 Repair Manual

a co ,...,
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0 0 \,;J ' Driver side cockpit fuse
assignment
F ig. 202 Drive r side cockp it : fuse panel w it h plastic bracket
Fuse panel @ ( black)
No . Equipment
Electromechan ica l powe r stee ring, trailer
1 hitch, ionizer, switch st
rip, seat heating
(rear), electromechan ica l park ing brake
Ho rn, climate con trol system, Gateway,
2 au
tomati c dimm ing in ter ior rearv iew m ir-
ro r, On -Board Unit
4 Park ing aid, headlight range adjustment
5
Dynamic steering, electronic stabilization
control (ESC)
6 Headlights
7 Adapt ive cru ise control
8 Front passenger's seat senso rs, a irbag
9 Gateway
10 Engine sound, nig
ht vision ass ist, garage
door opene r (H ome link), parki ng aid
11 Video camera
image processi ng
12 Headlights
13 Steering column sw
itch module
Fuses
Fuse panel @ (black)
14 Termina l 15 (luggage compartment)
1 5 Starte r
Fuse panel @ (brown)
No . Equipment
1 Infotainment system
2 Infot ainment system
3 Front passenger's seat
5
A
ir bag, e lec tronic sta bi liz ation con trol
( E SC)
6 Ant
i- theft alarm system
7 E lectromec ha nical pa rking brake
8 Inter io r li ghts
9
Windshie ld video came ra heating, light/
r ain sensor
10 Lumbar support (dr iver's se at)
11 Driver
's seat
12 Electronic stab ilizati on con trol
13 Horn
1 4 Head lights
lS Front seat heating
16 Dynamic s tee ring
Fuse panel © (red)
No . Equipment
1 Clutch peda l
2 Fuel p ump
3 Brake
light sensor
4 Engine acoustics
5 Rear door
6 Fr
ont door
7 Elec tronic stab iliza tion control
8 Windshie ld wiper motor
9 H ead light washer system
10 Interio
r light ing, climate control system
1 1 Head lights
12 Sunroof
235

a co .... N
" N .... 0 0 \,;J ' Fuse panel @ (red )
10 Rear seat entertainment
1 2 Rea r spo ile r (Sportbac k), sunroof
Fuse panel © (brown )
N o. Equipm ent
1 Infotainment system
2 Infota inment system
3
Infotainment, automatic dimming interior
rearview mirror
4 Rearview camera/peripheral cameras
5 TV tuner
6 Tank leak detection system
7 Sockets
8 Parking heater
1 0 Lumbar support (front passenger's seat)
11 Emergency
call
1 2 Infotainment system
Fuse panel @ (black )
N o. Equipm ent
Air suspension, adaptive dampers, sport
1 different
ial, electromechanical parking
brake
2 Clutch pedal position sensor/automatic
transmission
3 Seats
4 Rear wiper (Avant)
5 Side assist
6 Engine sound
7 Infotainment/sound amplifier
8 Gateway
9 Sport diffe rential
10 Climate control
system
11 T
ir e pressu re monito ring system, park ing
heate r
12 Start/Stop
system
Fuse panel © (black )
N o. E quipm ent
1 Special purpose vehicles/ rear seats
Fuses
Fuse panel ® (blac k)
N o. Equipm en t
1 Rear w indow defogge r
237

Bulbs
Bulbs
Replacing light bulbs
For your safety, we recommend that you have
your authori zed Audi dealer replace burned out
bulbs for you.
It is becoming increasingly more and more diffi ­
cult to replace vehicle light bulbs since in many
cases, other parts of the car must first be re­ moved before you are able to get to the bulb.
This applies espec ially to the light bulbs in the
front of your car wh ich you can only reach
through the eng ine compartment.
Sheet metal and bulb holders can have sharp
edges that can cause ser ious cuts, and parts
must be correctly taken apart and then properly
put back together to help prevent breakage of
parts and long term damage from water that ca n
ente r housings that have not been properly re­
sealed.
For your safety, we recommend that you have
your author ized Audi dealer replace any bulbs for
you, s ince your dealer has the proper tools, th e
correct bulbs and the expertise .
Gas discharge lamps (Xenon lights):
Due to the high electrical voltage, have the bulbs
replaced by a qualified technic ian . Headlights
with Xenon light can be identified by the high
voltage sticker.
LED headlights*
LED headlights require no maintenance. Please
contact your authorized Audi dealer if a bulb needs to be replaced.
A WARNING
Contact w ith high-voltage components of the
electrical system and improper replacement
of gas d ischarge (Xenon) headl ight bulbs can
cause se rious personal injury and death.
- Xenon bulbs are pressurized and can ex­
plode when be ing changed .
- Chang ing Xenon lamps requires the spec ial
train ing, instructions and equipment .
238
-On ly an authorized Audi dealer or other
qualif ied workshop should change the bu lbs
in gas discharge lamps.
A WARNING
There are parts with sharp edges on the open­
ings and on the bulb holders that can cause
serious cuts .
- If you are uncertain about what to do, have
the work performed by an author ized Audi
dealer or other qualified workshop . Ser ious
pe rsonal injury may res ult from improperly
pe rformed wor k.
(D Tips
- If you still prefer to replace the light bulbs
yourself, be aware that the engine compart­
ment is a hazardous area to wo rk in
~page 189 ~.&.
-It is best to ask your authorized Audi dea ler
w henever you need to change a bulb.

a co .... N
" N .... 0 0 \.J ' Emergency situations
General
This chapter is intended for trained emergency
crews and working personnel who have the nec­
essary tools and equipment to perform these
operations.
Starting by pushing or
towing
~ Note
Vehicles with an automatic transmission can­
not be started by pushing or towing.
Starting with jumper
cables
If necessary, the engine can be started by con­
necting it to the battery of another vehicle .
If the engine should fail to start because of a dis­
charged or weak battery, the battery can be con­
nected to the battery of
another vehicle, using a
pair of jumper cables to start the engine.
Jumper cables
Use only jumper cables of sufficiently large cross
section
to carry the starter current safely. Refer
to the manufacturer's specifications.
Use only jumper cables with
insulated terminal
clamps which are distinctly marked :
plus(+) cable in most cases colored red
minus(-) cable
in most cases colored black.
A WARNING -
Batteries contain electricity, acid, and gas.
Any of these can cause very serious or fatal in­
jury. Follow the instructions below for safe
handling of your vehicle's battery .
-Always shield your eyes and avoid leaning
over the battery whenever possible.
-A dead battery can freeze at temperatures
around 32 °F (0 °C) . If the vehicle battery is
frozen, you must thaw it before connecting
the jump start cables. If you do not, this in-
Emergency situations
creases the risk of an explosion and chemi­
cal burns. After jump starting the vehicle,
drive to an authorized Audi dealer or author­ ized Audi Service Facility immediately to
have the vehicle battery checked.
- Do not allow battery acid to contact eyes or
skin . Flush any contacted area with water
immediately.
- Improper use of a booster battery to start a
vehicle may cause an explosion .
- Vehicle batteries generate explosive gases .
Keep sparks, flame and lighted cigarettes
away from batteries.
- Do not try to jump start any vehicle with a
low acid level in the battery .
- The voltage of the booster battery must also
have a 12-volt rating . The capacity (Ah) of
the booster battery should not be lower
than that of the discharged battery. Use of
batteries of different voltage or substantial­
ly different "Ah " rating may cause an explo­
sion and personal injury.
- Never charge a frozen battery. Gas trapped
in the ice may cause an explosion.
- Never charge or use a battery that has been
frozen. The battery case may have be weak­
ened.
- Use of batteries of different voltage or sub­
stantially different capacity (Ah) rating may
cause an explosion and injury. The capacity
(Ah) of the booster battery should not be
lower than that of the discharged battery.
- Before you check anything in the engine
compartment, always read and heed all
WARNINGS
c>page 189.
@ Note
- Applying a higher voltage booster battery
will cause expensive damage to sensitive
electronic components, such as control
units, relays, radio, etc.
- There must be no electrical contact between
the vehicles as otherwise current could al­
ready start to flow as soon as the positive
( + ) terminals are connected.
239

Emergency situations
@ Tips
The discharged battery must be properly con­
nected to the vehicle's electrical system .
When jump starting or charging the battery,
never connect the negative ground cable to
the battery negative post because the battery
manager system must be able to detect the
battery's state of charge. Always connect the
negat ive g round cable to the negative ground
post of the battery manager control unit.
Use of jumper cables
Make sure to connect the jumper cable clamps in
exactly the order described below!
Fig . 205 Engine compartmen t: connecto rs for jump start
cables and charger
@
F ig . 206 Jump starting w it h the battery of anot her vehicle :
@-booster battery, @- discha rged vehicle battery
The procedure described below for connecting
jumper cables is intended to provide a jump start
for your veh icle.
Vehicle with discharged battery:
• Turn off lights and accessories, move lever of
automatic transmission to N (Neutral) or P (Park) and set park ing brake.
240
Connect POSITIVE(+) to POSITIVE(+) (red)
• Open the red cover on the positive terminal
i:!.> fig. 205.
1. Connect one end of the red positive cable on
the
jump start bolt ~ fig. 206@ (bolt under
the red cover= "positive") of the vehicle to be
started @.
2. Connect the other end to the positive termi-
nal @of the booster battery @.
Connect NEGATIVE(-) to NEGATIVE(-)
(black)
3. Connect one end of the black negative cable
to the negative terminal @ of the booster
battery @.
4. Connec t the other end to the
jump start pin
@ (bolts with hex head bolt= "negative") of
the vehicle to be started @.
Starting the engine
• Start the eng ine of the vehicle with the booster
battery @. Run the eng ine at a moderate
speed.
• Sta rt engine w ith discharged vehicle battery@
in the usual manner.
• If the engine fails to start, do not keep the
starter cranking for longer than 10 seconds.
Wait for about 30 seconds and then try again.
• With engine running, remove jumper cables
from both veh icles in the exact
reverse order.
• Close the red cover on the pos itive terminal.
The battery is vented to the outside to prevent
gases from entering the vehicle interior . Make
sure that the jumper clamps are well connected
with their metal parts in full contact w ith the
battery terminals.
A WARNING
To avoid serious personal injury and damage
to the vehicle, heed all warnings and instruc­
tions of the jumper cable manufacturer. If in
doubt, call for road service .
- Jumper cables must be long enough so that
the vehicles do not touch.
- When connecting jumper cables, make sur e
that they cannot get caug ht in any moving
pa rts in the engine compartment.
.,.

-Be fore yo u chec k any thing in the engine
compartment, a lways read and heed a ll
WARNINGS
c:::> page 189 .
(D Note
Impro per hook-u p of jum per cables c an r uin
the gene rato r.
-Always connect P OSITIVE( +) to POS ITIV E
( + ), and NEG ATIVE( -) to NEGATI VE( -)
g round post of t he battery manage r contro l
unit.
- Check that a ll sc rew p lugs on t he battery
ce lls are screwed in f irmly . If not, t ighten
plugs p rior to connecting clamp on negative
b attery termi nal.
- Please note t hat the procedure fo r con nect­
i ng a jumper cab le as desc ribed above ap­
pli es specifica lly to the case of yo ur vehicle
b eing jump starte d. W hen you are giv ing a
ju mp s ta rt to ano ther vehicle , d o
no t con­
ne ct t he negative( -) cable to the neg ative
(-) t ermin al on the disch arged b attery @
c:::> fig . 20 6. In stead , securely connec t the
n egative ( -) cable to either a solid metal
com ponent that is firm ly bolted to the e n­
gine block or to the engine bloc k itsel f. If
the battery that is be ing charged does not
vent to the outs ide, escap ing battery gas
could ignite and ex plode!
Towing with a tow truck
General hints
Your Audi requires special handling for towing .
The follow ing informa tion is to be used by com­
mercia l tow tr uck operators who know how to op ­
e rate the ir equip men t sa fely.
- Never tow your Audi. Towing will cause dam­
age to the engine and transmission .
- Never wrap the safety chains or winch cables
around the brake line s.
- To prevent unnecessary damage, your Audi
must be transported with a flatbed tru ck .
a co -To load the vehicle on to the flatbed , use the ,...,
~ towing loop found in the vehicle tools and at-N ,...,
0 0 \,;J ' Emergency situations
tach to the front or rear anchorage
c:::> pag e241 and c:::> page242 .
A WARNING
-
A vehicle bei ng towed is not safe for passen-
gers . N ever allow anyone to ride in a vehicle
being towed, for any reason.
Front towing loop
Fig. 207 Front bu mpe r: co ve r
Fig. 208 Front bu mper: i nst all ing the tow ing loop
T he t hreaded o pen ing for th e towing loop is lo­
cated be hind a cover on the r ight side of the front
bumper .
.,. Remove the towing loo p from the vehi cle too l
k it
c:::> page 226 .
.,. Press the cap inward with brief, force ful p res ­
su re
c:::> fig. 207 . The cap will loosen from the
bumper.
.,. T ighten the towing loop in the threaded open ­
ing until it sto ps
c:::> fig . 208 and then tighten it
w ith a wheel w re nch .
.,. After usi ng, p lace the tow ing loop back i n the
veh icle tool kit.
..,.
241

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0 0 \,;J ' Raising the vehicle
Lifting with workshop hoist and with floor
jack
The vehicle may only be lift ed at the lifting
points illus tr at ed.
Fig. 212 Fro nt lift in g poin t
Fig. 213 Re ar lift ing poin t
.,. Read and heed WARNING c::> &, .
.. Activate the veh icle ja ck mode* in the M MI:
I CAR I funct ion button> (Car) * systems contro l
bu tton >
Servicing & checks > Air susp.: jack
mode > On .
.. Loca te lift ing po ints c::> fig . 212 and c::>fig . 213 .
.. Adju st lifting arms of wo rkshop hoist o r floo r
jack t o match vehicle li fting poin ts.
.. In se rt a rubb er pa d between the floor jack/
wor kshop ho ist a nd the lifting points .
T he vehicle ja ck m ode* mus t be activa ted so that
the au tomatic a djustment of the Ad aptive Air
Suspension * does no t make it more difficult to
raise the ve hicle wit h the floor jac k.
If you must lift your vehicle with a floor jack to
work underneath, be sure the vehicle is safely
supported on stands intended for this purpose . Emergency situations
Front lifting point
T he lifting poin t is locate d on the floor p an rein ­
f o rcement about at the same level as the ja ck
mounting point
c::> fig . 212 . Do not lift the vehi­
cle at the vertical sill reinforcement .
Rear lifting point
T he lifting p oin t i s lo cate d on the ve rtic al rei n­
f o rceme nt o f th e lower s ill for the on- bo ar d jac k
c::>fig. 213.
Lifting with vehicle jack
Refer to c::> pag e 229 .
A WARNING
- To reduce the r is k of se rious inju ry and veh i­
cle dama ge.
-Always lift the vehicle o nly at the specia l
wor kshop h oist a nd f loor jack lift points
il­
l ustrated c::>fig. 212 and c::> fig. 213.
-Failure to lift t he ve hicle at these points
could ca use t he veh icle to tilt o r fall from
a lift i f th ere is a change in vehicle weight
dist ribution and balance . This might hap­
pen, fo r example, when heavy compo­
n en ts such as the eng ine block o r trans­
missi on a re removed .
- Whe n re mov ing heavy comp onents like
these, an ch or veh icle t o hois t or ad d co rre­
spon ding weig hts t o m aintai n the cen ter of
g ravi ty . Ot herw ise, the vehicle mig ht tilt or
slip off t he hoist, caus ing se rio us pe rsonal
i njur y .
(D Note
-Be aw are of the fo llow ing po ints b efor e lift­
ing the vehicle:
-The vehicle should never be lifted or
jacked up from underneath the engine oil
pan, the transmission housing, the front
or rear axle or the body side members.
This could lead to serious damage .
-To avoid damage to the underbody or
chassis frame, a rubber pad must be in­
serted between the floor jack and the lift
points .
.,.
243

a co ,...,
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" N ,...,
0 0 \,;J " Technical data
Vehicle specifications
XXXXX XX -X -XXXX XXX XX
®-+ : ::::::. XXXXXXXX XX X XX XXX XXX
IYP /lffl XXX XXX
XX XXXXXXX XX X X XX
XXX KW XXX
®i ~=-:~~ XXXX XXX XXX
©+ ~ rur:i~ xxxx I xxxx XXX I xx
II. · AIJSlit I OPTIONS
EOA 7D 5 4U B 6XM SSG SR W
2 EH JO Z 1LB 1AS 1BA
3FC SM U 7Xl
F O A 9G3 OG7 O YH OJF
TL 6 3 KA 8EH UlA X 9B OZ7
l XW
803
908 8Z4 020
7 T6 CV7
71<0 4X3 21< 2
3L4 4 KC 3YO 413 5 02
1S A 7GB
01A 4GQ
XX . X XX X XX X XXXX
Fig. 21 4 Vehicle ident ifica tion labe l
Vehicle Ident ifi cation Number (VIN )
The VIN number is located in the following pla­
ces :
-In the Infotainment system: select: the !CARI
function button > (C ar) * systems contro l but­
ton
> Se rvice & control > VIN numbe r.
-On the vehicle identification label
Dimensions
0
0
~ :x: Technical data
-At the front behind the windshield *
Vehicle identification label
The vehicle identif ication label ~ fig. 214 is loca t·
ed in the luggage compartment unde r the cargo
floor cover.
The veh icle identification label informat ion can
also be found in the Warranty and Maintenance
booklet .
The sticker contains the follow ing vehicle data :
© Vehicle Identification Number (VIN)
@ Vehicle type, eng ine output, transm ission
@ Engine and transmission codes
@ Paint and interior codes
® Optional equipment numbers
Notes about technical
data
T he values may vary based on special equipment
as well as market-specif ic equipment and meas­
uring methods .
Please note that the specific ations listed in the
vehicle documen tat ion a lways take precedence.
{I) Tips
Missing techni cal data was not ava ilable at
the time of pr int ing.
Length (in (mm )) Width (in (mm ))
Width across the Height at curb
mirrors (in (mm )) weight (in (mm))
A6 sedan 194.2 (4,932) 73.8 (1,874) 82.1 (2,086) 5 7 .8 (1,468)
56 sedan 194.4 (4,937) 73 .8
(1 ,874) 82.1 (2,086) 56.8 (1,443)
Capacities
Approximate capaci -
ties
Fuel tank 19.8 gal (75.0 L)
Windsh ield washer system 3.7 qt (3.5 L)
Windsh ield and headlight washer system* 5.2 qt (4.9 L)
245

a co .... N
" N .... 0 0 \.J ' Consumer Information
Warranty coverages
Your Audi i s co vered by the following warran­
tie s:
- New Vehicle Limited Warranty
- Limited Warranty Against Corrosion Perfora-
tion
- Emissions Control System Warranty
- Emissions Performance Warranty
- California Emissions Control Warranty (USA
vehicles only)
- California Emissions Performance Warranty
(USA vehicles only)
Detailed information regarding your warranties
can be found in your
Warranty & Maintenance
booklet .
Operating your vehicle
outside the U.S.A. or
Canada
Government regulati ons in the United States and
Canada require that automobiles meet specific
emission regulations and safety standards.
Therefore, vehicles built for the U.S.A. and Cana­
da differ from vehicles sold in other countries.
If you p lan to take you r vehicle outside the conti­
nenta l limits of the United States or Canada,
there is the possibility that:
- un leaded fue ls for vehicles with catalytic con­
verter may not be available;
- fuel may have a conside rably lower octane rat­
ing . Improper fuel may cause engine damage;
- service may be inadequate due to lack of proper
service facilities , tools or testing eq uipment;
- r eplacement parts may not be readily available.
- Navigation systems for veh icles built for the
U .S .A . and Canada w ill not necessarily work in
Eur ope, and may not wo rk in other countries
outside North America.
Consumer Information
@ Note
Audi cannot be responsib le for mechanical
damage that could resu lt from inadequate
fuel, service or parts ava ilability.
Audi Service Repair
Manuals and Literature
Audi Official Factory Service Manuals and Litera­
ture are published as soon as poss ible after mod­
el introduction. Se rvice ma nuals and literature
are available to order from the Audi Tec hni cal Lit ­
erature Orde ring Center at :
www .aud i.techli terature .com
Maintenance
General
Your vehicle has been designed to help keep
maintenance requirements to a minimum. How­
ever, a certain amount of regular maintenance is
still necessary to assure your vehicle's safety,
economy and reliab ility . For detailed vehicle
maintenance consult your Warranty
& Mainte­
nance booklet.
Under difficult operating conditions, for exam­
ple at extremely low outside temperatures, in
very dusty regions, etc., some service work
shou ld be performed between the intervals speci ­
fied. This applies particula rly to:
- oil changes, and
- cleaning or replacing the a ir filter .
@ For the sake of the environment
By regularly maintaining your vehicle, you
help make sure that emiss ion standards are
maintained, thus min imizing adverse effects
on the environment.
Important considerations for you and your
vehicle
The increasing use of electronics, soph isticated
fuel injection and emission control systems, and
the genera lly increasing technica l comp lexity of
today's automobiles, have steadily reduced the
.,.
247

Consum er Info rmation
scope of maintenance and repairs which can be
carried out by vehicle owners.
Al so , sa fet y and
en vironment al
concerns place very strict limits
on the nature of repairs and ad justments to en­
g ine and transmission parts wh ich an owner can
perform .
Maintenance, adjustments and repairs usually re­
qu ire special tools, testing devices and other
equ ipment available to specially trained work­
shop personnel i n order to assure proper per ­
formance, reliab ility and safety of the veh icle and
its many systems .
Improper maintenance, adjustments and repairs
can impair the operation and reliab ility of your
veh icle and eve n void your vehicle warranty .
Therefo re, proof of servicing in accordance w ith
the ma intenance sc hedule may be a condition fo r
up hold ing a possible wa rra nty claim made wi thin
the warranty pe riod.
Above all , operational safety can be adversely af­
fected, c reating unnecessa ry risks fo r you and
your p assengers.
If in doubt about any servicing, have it done by
your author ized Audi dealer or any other properly
eq uipped and qualified workshop . We strongly
urge yo u to g ive your author ized Audi dealer the
opportu nity to pe rform a ll scheduled ma inte ­
nance and necessary repairs. Your dealer has the
facilities, origina l parts and train ed sp ecialists to
keep your veh icle running properly.
Performing limited maint enance yourself
The fo llow ing pages describe a limited number of
procedures w hich can be performed on your ve hi­
cle with ordinary tools, should the need arise and
trained personne l be unavai lable . Before pe r­
forming any of these procedures, always thor­
ough ly read a ll of the app licab le text and carefu l­
ly follow the instructions g iven . A lways rigorously
observe the
WARNING S provided .
Before you check anything in the engine com ­
partment , alw ays read a nd heed all WARNINGS
c> .&. and c> .&. in Working in the engine compart­
ment on page 189 .
248
A WARNING
-Ser ious personal in jury may occur as a result
of imp roperly performed maintenance, ad­
justments or repairs .
- Always be extreme ly careful when work ing
on the vehicle . Always follow commonly ac­
cepted safety practices and general com­ mon sense. Never r is k personal in jury.
- Do not attempt any of the maintenance,
checks or repairs described on the following pages if you are not fu lly fam il iar with these
or other proce dures with respect to t he ve­
hicle, or are uncertain how to proceed.
- Do not do any work wi thout the prope r tools
an d equi pmen t. H ave the necessary wo rk
done by your authorized Au di dealer or an ­
other properly 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
gine is off . The radiato r fan switches on au­
tomatically when the coolan t reaches a cer­
tain tempe rature and w ill 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 vehicle with safety
stands if it is necessary to work underneath
the vehicle. The jack supp lied with the veh i­
cle is no t adequate fo r th is pu rpose a nd
could collapse causing serious personal in­
jury .
- If you must wor k unde rneath the vehicle
w ith the wheels on the g round, 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 t ransm iss ion) is in P (Park
position) and the pa rk b rake is applied .
Ill>