2017 AUDI A6 fuel

Checking and Filling
These fuel s contain substances that can se ­
verely damage the fue l system and the en­
gine if the engine is started .
Refueling
Fuel filler neck
The fuel fille r neck is located on the r ight rear
side pane l beh ind the f uel fi ller flap.
If the power locking system should fail , you can
still open the flap manua lly - for deta iled instruc­
tions see~
page 194 .
You can find the fuel tank capac ity of your vehicle
i n
~ page 257 .
The label on the inside of the fuel filler flap tells
you the correc t fuel for your vehicle . For more in­
formation about fue l specifications , see
~ page 190 .
Your veh icle fuel t ank has an onboard refuelling
vapor recovery sys tem . This fea tu re he lps to pre­
vent fuel vapors from escaping from the tank and pollut ing the env ironment while you refuel your
ve hicle. In order to fill the tank prope rly while
p rotecting the environment, please fo llow this
re fueling proce dure caref ully.
8_ WARNING
Under no rmal o perating conditions, never car ­
ry additiona l fuel containers in yo ur car. Gas
canisters and ot her containers used to trans­
port fuel can be dangerous . Such containers,
full or empty, may leak and could cause a fire
in a collision . If yo u must t ransport fue l to
use for yo ur lawn mower, snow blower, etc.,
be
very careful and a lways observe loca l and
s tate laws regar ding t he use, transportation
a nd sto rage of s uch fue l conta iners. Make ce r­
t ain the con tainer mee ts in dust ry sta ndards
(A NSI/AS TM F8S 2 - 86) .
(D Note
Never d rive yo ur vehicle unt il t he fuel tan k is
c ompletely empty . T he irregu lar sup ply of
fue l can ca use m isfiri ng. Gasoline cou ld enter
t he exha ust system and damage the catalytic
converter.
192
Fueling procedure
Fi g. 17 4 R ig ht rea r side o f th e ve hicle: ope ning t he fuel
fi ll er door
Fig . 1 75 Fue l fill er doo r w it h at tac hed fu el cap
The fue l filler doo r is u nlocked or locked by the
central locking system .
Opening the fuel cap
" Press on the left side of the fue l filler door to
open
~ fig . 174.
"Unscrew the tank cap co unterclo ckwise .
" Place the cap from
above on the open f uel f iller
door
~ fig. 175 .
Closing the fuel cap
" Scr ew the tank cap on to the right on the filler
neck unt il it ca nnot turn any fart her .
" Then press on the left s ide of the t an k door un-
til it latches.
Once the pump no zzle switches off , t he fuel ta nk
i s "full ". Do not fill the tank mo re . O therwise the
expans io n sp ace in the tan k w ill be filled.
The co rrect fuel type for your vehicle can be
fo und o n a label located on the inside of the f uel
fille r door . Fo r addi tional informat io n on fuel,
see
~ page 190 .

co
co
.... N
" N .... 0 0 <..:l ' The fuel tank capacity of your vehicle is listed in
the
Tech nical D ata s e ction ¢ page 257.
To avoid fuel spill ing or evaporating from the f uel
tank always close fuel cap p roperly and com­
p letely. An improperly closed fue l filler cap may
also cause the MIL lamp
r:!> pag e 25 to come on.
A WARNING
Not paying attention when fueling or han­
dling fuel incorrectly can lead to fires, exp lo­
sions or serious in juries.
- Fuel ignites easily and can cause serious burns and other injuries .
- If you do not switch the eng ine off when fu­
eling and/or do not insert the fuel no zzle
completely into the tank opening, fue l can
leak out or run over . Leaked fuel can ignite
and start a fire .
- Do no t use the telephone while fueling. The
electromagnet ic rays can cause sparks,
wh ich can ignite fuel vapors and start a fire .
- Do not s it in your vehicle while fueling . If
you must make an except ion and enter your
vehicle again wh ile fue ling , close the door
and touch meta l to discha rge static electric­
ity befo re touching the fue l nozzle . Static
electricity can create spar ks, wh ich can ig­
ni te vapors when fue ling.
- Do not smoke or have an open flame i n the
area when fueling your vehicle or filling a
fuel container because this increases the
risk of a n explosion .
- For your safety , carrying fuel containers in
your vehicle is not recommended . Whether
full or empty, the container can leak and cause a fire in the event of an accident.
- If you must make an exception and trans­
port a fuel container, note the following:
- Never fill the fuel containe r with fuel
while it is in or on the vehicle. Stat ic elec­
tr icity is d ischa rged when filling wh ich can
cause the f uel vapors to ignite and in­
creases the risk of an explos ion .
- Always p lace a fuel containe r on the
g round before fi lling .
- Always ho ld the fuel no zzle comp letely in
the fuel container when filling.
Ch eck ing and Filling
-If the fuel container is made of metal, the
fuel nozzle must always be in contact with
the container when filling it with fuel. This prevents stat ic electricity from discharg­
ing .
- Never spill fue l in the vehicle or the lug­
gage compartment. Evaporated fuel is ex ­
plosive and increases the risk of serious in­
ju ry or death .
- Follow legal req uirements when using,
stor ing and transporti ng fuel containers.
- Make sure the fuel container conforms to
industry standards (ANSI/ASTM F852-86).
CD Note
- Remove spilled fuel from vehicle pa int im­
mediately , because it can damage paint.
- Never drive unt il the fuel tank is complete ly
empty. The irregular supply of fue l that re­
sults from that can cause eng ine misfires .
Uncombusted fuel will enter t he exhaust
system and increase the risk of damage to
the catalyti c converter .
CD Note
Applies to: vehicles with diesel engines
If the f uel tank ru ns completely empty, the
i gni tion must remain sw itched on for a t least
30 seco nds after refueling before sta rting the
engine . It may take longer than usua l for the
engine to start, even up to a minute. This is
because the air must first bleed out of the
fuel system when start ing the engine .
@ For the sake of the environment
Do not overfill the fuel tank, otherwise fuel
can leak out when the veh icle is warming up.
(D Tips
The fuel filler door on your vehicle does not l ock if you lock the ve hicle from the ins ide.
(D Tips
Applies to: vehicles with diesel e ngin es
Diesel veh icles are equipped w ith a misfueling
guard
l )_ It a llows the vehicle to be fueled on-
l y w ith a diesel fuel p ump nozzle .
IJJ,,
193

Checking and Filling
-A worn or damaged nozzle or a nozz le that
is too sma ll may not be ab le to open the
diesel misfueling guard . If this is the case,
try turning the noz zle before inserting it in
the fuel filler neck, use a different fuel p ump, or see an authorized Audi dealer or
aut horized Aud i Serv ice Facility for ass is­
ta nce.
- The misfueling guard does not open when adding fue l from a fue l conta iner . You can
bypass it by adding the diese l fuel s low ly.
Fuel filler door emergency release
If the central locking system is faulty, the fuel
filler door can be unlocked manually.
F ig. 1 76 Righ t side tr im in the luggag e com pa rtmen t: re­
m ovi ng t he trim
F ig . 1 77 Luggage com partment: fuel f ille r doo r eme rge ncy
re leas e
Removing the side trim
• To remove the right side trim, fi rst remove the
re taine r from the mounts@¢
fig. 176.
• Turn both locking mechanisms 90° to the left
us ing a coin or a similar object and remove the
locking mechanisms .
l) Ma rket -specifi c
194
• Tilt t he retainer upward and pull the trim out .
Lay the trim down on its side, beca use there is
an electrical wire for the soc ket* on the back .
Fuel filler door emergency release
• Loose n the strap from its bracke t and p ull on it
¢ fig. 17 7 ¢(i). Th e f ue l filler door is re le ased .
• Press on the left side of the fue l filler door to
open it
¢ page 192, fig . 174.
(D Note
Only p ull on the loop u nti l yo u feel resistance .
You wi ll not hear it re lease . Otherw ise you
could damage the emergency release mecha­ nism .
Selective catalytic
reduction (AdBlue/DEF)
General information
Appl ies to: vehicles with selective catalytic reduct ion
In vehicles with selective catalyt ic reduction, a
u rea solution (AdBlue/DEF) is injected into the
exhaust system before a nitrogen oxide catalytic
conve rter to reduce nitrogen em issions . The urea
solution is known as Ad Blue or D EF (Diesel Ex­
haust Fluid) . Ad Blue is used in the follow ing .
The Ad Blue is carried in a separate tank in the ve­ hicle. The AdBlue usage acco unts for approxi ­
mately 0 .5% to 2 .5% of the diese l fuel that is
u sed .
When a message about refilling the AdBlue ap­ pears in the instrument cl uster display, you must
ref ill the Ad B lue yourself or have it refilled by an
autho rized Aud i dea le r o r a uthorized Audi Serv ice
Fa cility
¢ page 195.
(D Tips
- The i nstr ument cluster d isplay ind icates the
dis tance remaining that ca n be driven
¢ page 195 . If the Ad Blue tank is com ­
pletely emp ty, the eng ine will no t st art
again after the ign ition is swi tched
off.

Checking and Filling
& WARNING
AdBlue can irritate the skin, eyes and respira­tory system. If there is contact with the fluid,
flush immediately with plenty of water . Con­
sult a physician if necessary.
(D Note
- Only use Ad Blue that conforms to the
standard ISO 22241 -1. Do not mix any addi ­
tives with the Ad Blue and do not dilute it
with water.
- Do not add Ad Blue to the diesel tank or add diesel fuel to the Ad Blue tank. Do not start
the engine under any circumstances if the
wrong fuel is filled in the tank. There is a
risk of damaging the fuel tank system and
the engine. See an authorized Audi dealer or
authorized Audi Service Facility for assis­
tance.
- AdBlue attacks surfaces such as painted ve­
hicle components, plastic and carpet. Re­
move the fluid as quickly as possible with a
damp cloth and plenty of cold water. If the
Ad Blue has already crystallized, use warm
water and a sponge . AdBlue residue that is
not removed will crystallize and can damage
the affected surface.
- Do not store refill bottles or canisters per ­
manently in the vehicle. If the container
leaks, the escaping AdBlue could damage
the vehicle interior.
- Do not allow AdBlue to come into contact
with clothing. If there is contact with the
fluid , flush immediately with plenty of
wa­
ter.
(j) Tips
Follow the Ad Blue manufacturer 's instruc­
tions for use and storage.
Refilling AdBlue using a bottle
Applies to: vehicles with selective catalytic reduction
... Remove the cap from the refill bottle ¢.&. in
Filling AdBlue on page 196,
c::> (D in Filling
AdBlue on page 196.
196
... Position the bottle on the filler tube and turn
the bottle clockwise until it stops turning.
... Press lightly against the bottom of the bottle
to empty it . Continue pressing the bottom of
the bottle until it is empty or until fluid stops
flowing into the tank .
... Remove the bottle and seal the filler neck
c::> page 197, Completing AdBlue refill.
d) Note
Only use refill bottles that are approved for
your vehicle. Using other systems can cause AdBlue to leak.
(D Tips
- You can obtain refill bottles from an author­
ized Audi dealer or authorized Audi Service
Facility.
- A permitted refill bottle contains approxi­
mately 0.5 gallon (1.9 liters) of AdBlue.
Refilling AdBlue using a canister
Applies to: vehicles with selective catalytic reduction
®
+®
Fig. 179 Canister w ith attachable hose
... Remove the cover from the refill canister c::> .&.
in Filling AdBlue on page 196 , c::>(D in Filling
AdBlue on page 196 .
.,. Secure the end of the hose the canister @by turning the hose to the right.
.,. Remove the cap @from the other end of the
hose @.
... Position the end of the hose @on the filler
neck in the vehicle and turn the hose to the
right to tighten it .
... Lift the canister up and then tip it . Continue
holding the canister in a tipped position until it
1J,,

co
co
.... N
" N .... 0 0 <..:l - is empty or until no more fluid flows into the
tank .
.,. Remove the canister and close the fi ller tube
c:> page 197 , Comple ting AdBlue refill .
CD Note
Only use refi ll canisters that are approved for
your vehicle. Us ing other systems can cause
Ad Blue to leak.
(D Tips
- An authorized Audi dealer or authorized
Audi repair facility can tell you which ref ill
canisters are approved for your vehicle.
- A permitted refill canister conta ins approxi­
mately 1.3 gallons (5 liters) of AdBlue.
Completing AdBlue refill
Applies to: vehicles with selective catalytic reduction
Clo sing the filler nec k
.,. Tu rn the cap on the filler neck to the right with
the wheel wrench until the cap clicks into place.
This t ightens the cap to the specification c::> .&.
in Filling AdBlue on page 196, c:> 0 in Filling
AdBlue on page 196.
.,. The n press on the left side of the tank doo r un-
t il it latches .
After filling
The vehicle must be dr iven so that the system
recognizes that the Ad Bl ue was refilled . Th is can
take severa l m inutes.
.,. If there was no Ad Blue left in the tank and a
range of O mi (0 km) was shown in the display,
switch the ign ition on for about 30 seconds be­
fore starting the engine.
(D Tips
Ad Blue can freeze at very low temperatures.
If th is happens , the system will not detect
that the Ad Blue was refilled and it will contin­
ue to inform yo u of the low Ad B lue level. The
message turns off as soon as the tank thaws
out again .
Ch eck ing and Filling
Catalytic converter
Applies to: vehicles with gasoline engine
It is very important that your emission control
system (cataly tic converter) is functioning prop­
erly to ensure that your vehicle is running in an
environmentally sound manner.
.,. Always use lead-free gasoline c:> page 190 , Fuel
supply.
.,. Never run the tank down all the way to empty .
.,. Never put too much motor o il in your engine
c:> page 203, Adding engine oil.
.,. Never try to push- or tow-start your vehicle.
The catalytic co nverter is an efficient "clean -up"
device built into the exhaust system of the ve hi­
cle. The catalyt ic converter b urns many of the
po llutants in the exhaust gas before they are re­
leased into the atmosphere.
The exclusive use of un leaded fuel is cr itically im­
portant for the life of the catalytic converte r and
prope r funct ion ing of the eng ine .
_&. WARNING
The tempera ture of t he exhaus t sys tem is
h igh, bot h when driv ing and a fter stopping
the engine .
- Never tou ch the exhaust tail pipes once they
have become hot. This cou ld resu lt in burns.
- Do not park or operate the vehicle in ar eas
where the hot exhaus t sys tem may come in
contact with dry grass, b rush, fuel spill or
other material which can ca use a fire.
- Do not app ly additiona l undercoating or
r u stp roofing on or near the exhaust mani­
fold, exha ust pipes, cata lytic converter or
heat shields . D uring driving, the substance
used for undercoat ing could overheat and
cause a fire.
CD Note
- Be aware that just one tank fi lling with
leaded fuel w ill already seriously degrade
the performance of the catalytic converter .
- Do not exceed the correct engine oil leve l
c:> page 203.
197

Check ing and F illing
- Do not drive until the fuel tank becomes
complete ly empty . The engine cou ld mis­
fire . Unburned fuel could also get into the
exhaust system and this cou ld cause the
catalytic converter to overheat.
- Do not sw itch off the ignition while the vehi­
cle is moving .
- Do not continue to operate your vehicle un­
der these cond itions, as otherwise fuel can
reach the catalytic converter . This could re­
su lt in overheating of the converter, requ ir­
i ng its replacement .
- To assure efficient operation of the Emis­
sion Control System :
- Have your ve hicle main tained pro perly and
in accordance with the service recommen ­
dations in your Wa rranty & Maintenance
book let.
- Lac k of proper maintenance as well as im ­
proper use of the vehicle will impair the
function of the emission cont rol system
and could lead to damage.
@ For the sake of the environment
Even when the Emission Control System is op­
erat ing properly, the exhaust gas can have a
sulfur-like exhaust gas smell under some op­
erat ing states . This depends on the su lfur
content of the fuel be ing used . Using a differ­
ent brand of fue l may he lp, or filling the tan k
w ith lead-free super grade gasoline.
Diesel particulate filter
A ppl ies to: ve hicles w ith diesel e ng in e
The diesel particulate fi lter filters nearly all of
the soot particles out of the ex haust. The f ilter
cleans i tse lf automatically under normal d riv ing
conditions. If the filte r ca nnot clean itse lf (for e x­
a mple , beca u se you are only driving sho rt distan­
ces), the fi lter becomes clo gged with soot and
the . symbo l for the diesel particulate fi lter il­
lum inates
c:> page 18.
A WARNING
- Do not park you r vehicle over flammable
materials such as grass or leaves because
198 -
the high temperature of the diesel particu­
late filte r could sta rt a fire .
- Do not apply an underbody protectant in the
exhaust system area or a fire could sta rt.
Engine compartment
· Working in the engine compartment
Special care is required if you are working in the
engine compartment
For work in the engine compartment, such as
checking and fill ing fluids , the re is a risk of in­
jury, scalding, accidents , and burns. For this
reason, follow all the warnings and general
safety precaut ions provided in the following in ·
formation . The engine compartment is a dan­
gerous area on the vehicle.
c:> .&, .
A WARNING
-Turn the engine off.
- S witch t he igni tion off.
- Set the park ing bra ke .
- Select the P s elector lever position.
-Let the eng ine cool down .
- Never open the hood when there is steam o r
coo lant escaping from the engine compart­
ment, because there is a risk that you could
be burned . Wait unt il no steam or coolant is
escaping .
- Keep children away from the eng ine com­
pa rtment .
- Never sp ill fluids on a hot eng ine. These flu­
ids (such as the freeze protection contained
in the coolant) ca n ca tch fire .
- Avoid short c ircuits in the electrical system .
- When working in the engine compa rtment,
remember that the radiator fan can switch
on even if the ignition is switched off, wh ich
increases the r is k of p ersona l injury.
- Never ope n the cap on the coolant expan­
sion tank when the engine is warm . The
coo ling system is under p ressure .
- To protect your face, hands, and arms from ho t steam or coolant, cover the cap with a
large cloth wh en opening .
~

co
co
.... N
" N .... 0 0 <..:l ' -Do not remove the engine cover under any
circumstances . This increases the risk of
burns.
- If tests need to be performed with the en­
gine running, there is additional danger due
to moving components (such as the ribbed belt, alternator and radiator fan) and from
the high voltage ignition system.
- Do not under any circumstances give gas in­
advertently (for example, by hand from the
engine compartment) if the vehicle is sta­
tionary but the engine is running and a gear
is engaged. Otherwise, the vehicle will start
to move immediately and this could result
in an accident.
- Pay attention to the following warnings list­
ed when work on the fuel system or on the
electrical equipment is required.
- Do not smoke .
- Never work near open flames.
- Always have a working fire extinguisher
nearby
- All work on the battery or electrical system
in your vehicle can result in injuries, chemi•
cal burns, accidents or burns. Because of
this, all work must be performed
only by an
authorized Audi dealer or authorized Audi
Service Facility.
- To reduce the risk of electric shock and in­
jury, never touch the following components when the engine is running or is being start­
ed :
- Ignition cable
- Other components in the electronic high-
voltage ignition system
- If you must check or perform work on the
engine while it is running:
- Set the parking brake and place the selec­
tor lever in the P (park) position first .
- Always proceed with extreme caution so
that clothing, jewelry or long hair do not
become caught in the radiator fan, fan
belt or other moving components or do not come into contact with hot compo­
nents. Tie back long hair before beginning
work and do not wear clothing that can
hang down into the engine .
Checking and Filling
-Limit your exposure to exhaust and chemi­
cals to as short a time as possible
c:> A .
A WARNING
-California Proposition 65 Warning:
- Engine exhaust, some of its constituents,
and certain vehicle components contain or
emit chemicals known to the State of Cali­
fornia to cause cancer and birth defects and
reproductive harm . In addition, certain flu­
ids contained in vehicles and certain prod­
ucts of component wear contain or emit
chemicals known to the State of California
to cause cancer and birth defects or other
reproductive harm.
- Battery posts, terminals and related acces­
sories contain lead and lead compounds,
chemicals known to the State of California
to cause cancer and reproductive harms. Wash hands after handling.
(D Note
When filling fluids, be sure not to mix the flu­
ids up. Otherwise severe malfunctions and en­
gine damage will occur.
@ For the sake of the environment
You should regularly check the ground under
your vehicle in order to detect leaks quickly. If
there are visible spots from oil or other fluids, bring your vehicle to an authorized Audi deal­
er or authorized Audi Service Facility to be
checked.
199

Check ing and F illing
Using the proper engine oil is impo rtant for the
functionality and service life of the engine. Your
engine was facto ry-filled with a h igh-quality oi l
which can usually be used throughout the entire
year.
@) Note
Your Limited New Vehicle War ranty does not
cover damage or malfunctions due to failure
to follow recommended maintenance and use
requirements as set forth in the Audi Owner's
Manual and Warran ty
& Maintenance booklet.
- Use only a high quality eng ine oil t hat ex-
p ressly complies with the Audi oil qua lity
standard specified for your vehicle's engine.
Using a ny o ther oil can cause serious engine
d am age.
- D o not mix any lubricants o r other addit ives
i nto the engine oil. Doing so ca n cause en­
g ine damage.
(D Tips
I f you need to add oil and there is none availa­
ble t hat meets the Audi o il quality standard
your eng ine requi res, you m ay ad d a tot al of
no more than 0.5 q t (0.5
l) of a h igh-quali ty
"synthe tic"oil that meets t he following speci ­
fications.
- Applies to: gasoline engine: ACEA A3 or
API SM with a viscosity g rade of SAE 0W-30,
SAE SW -30 or SAE SW-40.
- Applies to: diesel engine: ACEA C3 or API C F
with a viscosity grade of SAE 0W-30 or
SAE SW-30.
- Fo r more information about engine o il that
has been approve d for your ve hicle, please
contact either you r authorized Audi dea ler
or Audi C ustome r Relat ions at
1 (800) 822-2834 or visit our web site at
www.audiusa.com or www .aud icanada .ca.
Engine oil consumption
The engine in your vehicle depends on an ade­
quate amount of oil to lubricate and cool all of
its moving parts .
In order to provide effective lubr ication and cool­
ing of internal engine components, a ll inter nal
202
combust ion engines consume a certa in amo unt
of oil. Oil consumption varies from engine to en­
gine and may change signi ficantly over the life of
the engine. Typically, engines w ith a specified
break-in period (see
c:::;, page 66) consume more
o il dur ing the break-in per iod than they consume
af ter o il consumption has stab ilized .
Under normal cond itions, the rate of oil con­
sumption depends on the quality and viscos ity of
the oil, the RPM (revo lutions per m inute) at
wh ich the engine is operated, the amb ient tem­
perature and road condit ions. Furt her facto rs a re
the amo unt of o il di lution from wate r condensa ­
t ion or fue l resid ue an d the oxidation level of the
o il. As any engine is sub je ct to wear as mileage
builds up, the oi l cons umption may increase ove r
time unt il replacement of worn components may
become necessary.
With a ll these va riab les coming into p lay, no
standard rate of oil consumption can be estab ­
li shed or spec ified. The re is no alte rnative to reg­
ul ar and freq uent checking of the oi l level, see
Note .
If the yellow engine oi l level warning symbo l in
the instr ument cluster
El lights up, yo u should
check the o il level as soon as possible
c:::;, page 203. Top off the o il at your ea rliest con­
venience
c:::;, page 203.
A WARNING
Before you check a nyth ing in the e ng ine com­
par tment, always read and heed all WARN­
IN GS
c:::;, .&. in Working in the engin e compart­
ment on page 198.
(D Note
Drivi ng w it h an insuff ic ient oil level is likely to
cause severe damage to the eng ine.
(D Tips
- The oil pressure warn ing d isplay. is not
an indicator of the oil level. Do not rely on
it. Instead, check the oil level in your en­
gine at regular intervals, preferably each
time you refuel, and alway s before going
on a long trip .