2014 AUDI A6 engine

218 Fuel supply and filling your fuel tank
container meets industry standards (ANSI/
ASTM F852 -86) .
(D Note
Never drive your vehicle until the fuel tank
is completely empty. The irregular supply
of fuel can cause misfiring . Gasoline could
enter the exhaust system and damage the
catalytic converter.
Refuelling
Fig. 179 R ig ht rear v ehicl e side: Openin g th e fu el fille r
fl ap
Fig. 180 Fu el f iller flap with attached f uel cap
When activating the central locking, the fuel
filler flap is automatically unlocked or locked .
Refuel the vehicle with the ign ition switched
off .
Taking the fuel cap off
,. Press the left side of the fuel filler flap to
open it
c:> fig. 179 -arrow -.
,. Unscrew fuel filler cap counter -clockwise
and hang it on the fuel filler flap
c:> fig. 180.
,. Check the label on the inside of the fuel fill­
er flap to determine if the vehicle must be
fueled with gasoline or diesel fuel.
Refuelling procedure
,. Insert the fuel nozzle from the gasoline
pump into the fuel filler neck as far as it will
go .
,. Select a med ium r efuelling rate so that the
no zzle switches off automatically when the
tank is full.
Putting the fuel cap back on
,. After filling your tank, twist the fuel filler
cap clockwise as far as it w ill go.
,. Close the fue l filler flap.
T o avoid fuel spilling or evaporating from the
fuel tank always close fuel filler cap properly
and completely. An improperly closed fuel fill­
er cap may also cause the MIL lamp
c:> page 30
to come on.
A WARNING
Improper refue ling or handling of fuel can
cause fire, explosion and severe burns.
- Fuel is highly flammable and can cause
severe burns and other injur ies .
- Failure to shut the engine off while refu­
eling and/or to insert the pump nozzle
fully into the fuel filler neck could cause
fuel to spray out of filler neck or to over­
flow. Fuel spray and overflowing fuel can
cause a fire.
- Never use a cellular telephone while re­
fue ling. The electromagnet ic rad iat ion
can cause sparks that can ignite fuel va­
pors and cause a fire.
- Never get back into your vehicle whi le re­
fueling.
If in exceptional circumstances
you must get back in your vehicle while
refueling, make certain that you close
the door and touch metal to discharge
static electricity before touching the fill­
er nozzle again. Static electricity can
cause sparks that can ignite fuel vapors
released during refueling .
- Never smoke or have an open flame any­
where in or near your veh icle when refu-
eling or filling a portable fuel conta iner . ..,

220 Fuel supply and filling your fuel tank
Fuel filler flap emergency release
You can open the fuel filler flap by hand if the
power locking system should fail .
Fig. 181 Luggage co m partmen t: open ing the side tr im
Fig. 182 Right side trim panel in the lu ggage compar t­
ment: e mergency release mechanism
Opening the side trim
• To remove the right side trim, first remove
the retainer from the mounts
¢ fig. 181.
• Turn both locking mechanisms 90° to the
left using a coin or a similar object and re­
move the locking mechanisms.
• Tilt the retainer upward and pull the trim
out . Lay the trim down on its side, because
there is an electrical wire on the back.
Fuel filler door emergency release
The emergency release mechanism is located
behind the right side trim panel in the lug ­
gage compartment.
• Loosen the loop i:>
fig. 182 from the retainer
and then pull on the loop carefully i:>Q).
• Press on the left side of the fuel filler door
to open
i=> page 218, fig. 179.
(D Note
Only pull on the loop until you feel resist­
ance. You will not hear it release . Other- wise you could
damage the emergency re­
l ease mechanism .
Selective catalytic
reduction
General information
Applies to vehicles: with diesel engine
On vehicles with selective cata lytic reduction,
an urea solution (Ad B lue) is injected into the
exhaust system before a nitrogen oxide cata­
lytic converter to reduce nitrogen emissions.
The Ad Blue is stored in a separate tank in the
vehicle. The Ad Blue usage accounts for ap­
proximately 0.5% to 1.2% of the diesel fuel
that is used.
You must refill the Ad Blue or have it refilled
by you r authorized Audi dea ler or qualified
workshop as soon as the Ad Blue refill mes­
sage appears in the instrument cluster
¢page 222.
A WARNING
-Failure to heed AdBlue refill information in
the instrument cluster can prevent the ve­
hicle from be ing started and driven . If the
vehicle cannot be driven and an emergency
arises, personal injury can occur.
- Always have the AdBlue tank refilled well
before the tank runs dry.
(D Tips
-The instrument cluster display ind icates
the distance remaining that can be driv­
en
c> page 221. If the Ad Blue tank is
completely empty, the engine will not
start again after the ignition is switched
off.
-Ad Blue is required by law to operate this
vehicle.

Indicator in the instrument cluster
display
Applies to vehicles: with diesel e ngine
The display indicates if the Ad Blu e level is low
or if it was filled incorre ctly.
Fig . 183 In strument clus te r: indica tor in th e display
AdBlue l evel low
You will be informed if the Ad Blue in the tank
drops be low a certain level.
Plea se refill Ad B lu e. Rang e 1500 miles
(2400 km)
This indicato r appears when there is on ly
enough Ad B lue left to drive the d istance ind i­
cated in the driver i nformat ion system . Please
a dd AdB lue.
AdBlue ,0 Refill Ad Blue! Cannot start en ­
gine in
600 miles (1000 km )! See owner's
manual
This indicato r appears when there is only
e nough Ad B lue left to dr ive t he d istance ind i­
cat ed in t he d rive r in format ion system . Please
add Ad Blue. O therw ise the eng ine will not
start ag ai n if you stop i t once the distan ce in­
d icated has been driven.
Refill Ad Blue! No r estart! S ee
owner 's manual
This message appears when the AdBlue ta nk
i s empty . Please add Ad Blue. Otherwise you
will not be ab le to s tart th e engi ne aga in o nce
you stop i t.
W hen the minimum AdBlue level has been
reac hed, you must add Ad Bl ue
q page 222 .
Fuel suppl y and filli ng your fuel t ank 221
¢4 Filling incorrectly
If the AdBl ue tank was filled with a different
fluid than Ad B lue and the system dete cts t hat
it is incorrect, a message will appear.
AdBlue ./ AdBlue: Sy stem fault No restart
in
6 00 mile s (1000 km)! See owner 's man ­
ual
T his message appears w hen it is on ly possible
to dr ive the dis tance indicated in the d river in­
format ion sys tem . Drive to the nea rest quali­
fied wor kshop to have the ma lfunction re­
paired. Otherwise the eng ine will not start
again if yo u stop it once the distance indicated
has been driven.
AdBlue: System fault No re start!
See owne r's manual
Th is message appears if the system detects it
was filled in co rrec tly. Drive immedia tely to
the nearest qua lified workshop to have the
malfu nction repaired . Otherwise yo u wi ll not
be able to start the engine again once you
stop it.

222 Fuel supply and filling your fuel tank
Filling AdBlue
Applies to vehicles: with diesel engine
A special refill bottle must be used to fill the
AdBlue .
Fig. 184 Rig ht rear vehicle side: remov ing the Ad B lue
cap
Fig . 185 Ad Blue filler tube: inse rting the refill bottle
The AdBlue fi ller tube is located near the die­
sel filler tube . Always add 1.5 gallons (5. 7 lit­
ers) of AdBlue (three bottles). This is the mini­
mum amount required to ensure the system
detects the refilling and to start the eng ine.
The AdBlue tank capacity is approximately
4 .5 gal lons (17 liters).
Opening the filler tube and adding
AdBlue
Requirement : The request to add Ad Blue must
appear in the instrument cluster display.
• Switch the ignition off .
• Open the tank cover
¢page 218.
• Turn the cap counterclockw ise with the lug
wrench from the vehicle tool kit to remove it
¢fig. 184.
• Remove the cap from the refill bottle.
• Position the refill bottle on the filler tube
and turn the bottle clockwise until it stops
turning
(D ¢ fig . 185.
• Press lightly against the bottom of the bot­
tle @to empty it. Continue pressing the
bottom of the bottle until it is empty or un­
til fluid stops flowing into the tank.
• Turn the bottle to the left without pressing
on the bottom .
Closing the filler tube
• Turn the cap clockwise on the filler tube
with the lug wrench until you hear it tighten
completely .
• Close the tank cover.
After filling
The vehicle must be driven. The system may
take up to two minutes to detect that the
AdBlue has been f illed.
• If there was no Ad Blue left in the tank and a
range of
O mi (0 km) was displayed in the
instrument cluster, switch the ignition on
for about 15 seconds before starting the en­ gine.
A WARNING
= Ad Blue can irritate the sk in, eyes and res-
piratory system. If there is contact with
the fluid, flush immediately with plenty of
water. Consult a physician if necessary.
(D Note
- Only use Ad Blue that conforms to the
standard ISO 22241-1. Do not mix any
additives with the AdBlue and do not d i­
lute it with water.
-A d Blue is not a diesel add itive . Do not
add it to the diesel tank. If Ad Blue is
m ixed with diesel fuel, it can lead to
damage to the engine and the AdBlue
tank system . The Limited New Vehicle
Warranty does not cover such damage.
- Ad Blue attacks surfaces such as painted
vehicle components, plastic and carpet.
Remove the fluid as quickly as possible
w ith a damp cloth and p lenty of cold wa­
ter. If the AdBlue has already crystal-
lized, use warm water and a sponge. .,..

224 Checking and filling
Checking and filling Engine hood
Releasing the engine hood
The engine hood is released from inside the
vehicle .
Fig. 186 Driver foo twell: release lever
Fig. 187 Rocker switch un der the hood
Make sure the wiper arms are not raised up
from the windshield. Otherwise the paint
could be damaged .
.,. Pull the lever under the instrument panel in
the direction of the arrow
¢ fig. 186.
.,. Raise the hood slightly¢,&. .
... Press the rocker switch under the hood up­
ward
~ fig. 187. This releases the catch.
• Open the hood.
&_ WARNING
Hot engine coolant can burn you.
- To reduce the risk of being burned,
never
open the hood if you see or hear steam
or coolant escaping from the engine compartment . Wait until no steam or
coolant can be seen or heard before care­
fully opening the hood .
'Working in the engine compartment
Be especially careful whenever you work in
the engine compartment.
Whenever you must perform any work in the
engine compartment, for example checking
and filling different fluids, there is a risk of injury, burns and accidents. To prevent per­
sonal injury always observe the following
WARNINGS. The engine compartment of any
vehicle is a hazardous area
¢ ,&. .
A WARNING
To help avoid injury, before you check any­
thing under the hood:
- Turn off the engine.
- Switch off the ignition .
- Apply the parking brake.
- Move selector lever to P (Park).
- Always let the engine cool down. Hot
components will burn skin on contact.
- To reduce the risk of being burned, never
open the hood if you see or hear steam
or coolant escaping from the engine
compartment. Wait until no steam or
coolant can be seen or heard before care­
fully opening the hood.
- Keep children away from the engine com­
partment.
- Never spill fluids on hot engine compo­
nents . They can cause a fire .
- Never touch the radiator fan. The auxili­
ary electric fan is temperature controlled
and can switch on suddenly .
- Never open the coolant reservoir cap
when the engine is still warm . The cool­
ant system is pressurized and hot cool­
ant could spray out.
- Protect your face, hands and arm from
steam or hot engine coolant by placing a
thick rag over the cap when you open the
coolant reservoir.
- Do not
remove the engine cover under
any circumstances. This increases the
risk of burns.
- If work on the fuel system or the electri­
cal system is necessary:

-Always disconnect the battery.
- Never smoke or work near heaters or open flames. Fluids in the engine com­
partment could start a fire.
- Keep an approved fire extinguisher im­
mediately available.
- To avoid electrical shock and personal in­
jury while the engine is running or being
started, never touch :
- Ignition cables
- Other components of the high voltage
electronic ignition system.
- If you must perform a check or repair
with the engine running:
- First, fully apply the parking brake,
move selector lever to P (Park).
- Always use extreme caution to prevent
clothing, jewelry, or long hair from get­
ting caught in the radiator fan, V-belts
or other moving parts, or from contact­ ing hot parts. Tie back hair before
starting, and do not wear clothing that
will hang or droop into the engine.
- Minimize exposure to emission and
chemical ha zards c:::> & .
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
California to cause cancer and birth de­
fects and reproductive harm. In addition ,
certain fluids contained in vehicles and
certain products of component wear con­
tain or emit chemicals known to the
State of California to cause cancer and
birth defects or other reproductive harm .
Checking and filling 225
-Battery posts, terminals and related ac­
cessories contain lead and lead com­
pounds, chemicals known to the State of
California to cause cancer and reproduc­
tive harms. Wash hands after handling.
(D Note
When adding fluids, always make sure that
they are poured into the proper container
or filler opening, otherwise serious dam­
age to vehicle systems will occur.
(® For the sake of the environment
To detect leaks in time, inspect the vehicle
floor pan from underneath regularly . If
you see spots from oil or other vehicle flu­ ids, have your vehicle inspected by an au­
thorized Audi dealer.
Closing the engine hood
.,. Pull the hood down until the pressure from
the struts is reduced.
"'Let the hood
drop down and latch in place.
Do not try to push it shut; it may fail to en­
gage
c:::> ,A .
A WARNING
-
A hood that is not completely latched
could fly up and block your view while driv ­
ing .
- When you close the engine hood, check it
to make sure the safety catch has proper­ ly engaged. The hood should be flush
with the surrounding vehicle body parts.
- If you notice while driving that the hood
is not secured properly , stop at once and
close it. •
•

226 Checking and filling
Engine compartment
Engine compartment overview
These are the most important items that you can check .
Fig. 188 Typi cal layout for conta iner s and en gine o il filler cap
(D Jump start point(-) with hex
head screw .................
237,274
@ Jump start point(+) under a cov-
er .. .. .. .. ........ .. ..... .
237,274
®
©
®
®
Brake fluid reservoir ((0)) . . . . . 234
Engine oi l fille r cap ( Coolant expansion tank (- L) ...
Windshield/headlight washer
232
t . (.'R ) con ainer ,,.., ...... ....... . 238
The engine oil filler neck (item @) may be lo­
cated in a different area depending on the ver­
sion of the engine.
~ WARNING
Before yo u check anything in the engine
compartment, always read and heed all
WARNINGS
¢ &. in Working in the engine
compartment on page 224.
-
Engine oil
Engine oil specifications
The engine in your Audi needs the righ t kind
of oil.
The engin e in your Audi is a sophisticated
powerpl ant that was bu ilt to exacting spe cifi­
cations . Thi s engine needs the righ t kind of
engine oil that meets specification s regarding
quality and v iscosity so that it can run
smoothly and reliably . Choosing the right oil
and changing oil within the tim e and mileage
intervals printed in you r vehicle's Warra nty
&
Maintenance booklet matters a lot more to­
day than it did years ago . Audi has developed
a special quality standard for engine oil that
will h elp assur e that your vehicle's engine wi ll
get the lubr ication it need s for proper opera -
tion. ..,.

Modern eng ine lubrication has taken a quan ­
tum leap in the last few years . Many synthetic
oils available today provide better engine lu­
brication that can outlast traditional petrole­
um-based oils, making them a smart choice
for use throughout the life of your Audi.
Whether you use synthetic or petroleum­
based engine oil, the oil that you use must
conform to Audi's oil quality standard
VW 502 00 (vehicles with gasoline engine) or
VW 507 00 (veh icles with diesel engine) to
he lp keep your vehicle's eng ine running
smoothly and help prevent the fo rmation of
harmf ul depos its, sometimes ca lled "sludge,"
that over time can lead to expensive repairs.
At the time of pr inting, engine o ils availab le in
the U.S. and Canada tha t meet the exacting
specifications of A udi oil standard VW 502 00
(vehicles with gaso line engine) or VW 50 7 00
(vehicles with diesel engine) are synthetic en­
gine oils . This does not mean, however, that
every synthetic engine oil will meet Aud i oil
standard VW 502 00 (vehicles with gasoline
engine) or VW 507 00 (vehicles w ith diese l
engine). So always be sure that you use an ap­
proved oil.
To help prevent the formation of harmful de­
posits use only oil with the follow ing spec ifi­
cations printed on t he oil container:
- Aud i oil standard VW 502 00 (gasoline en ­
gine )
- Aud i oil standard VW 50 7 00 (d iesel en -
gine )
Oil conta iner labe ls may carry the specif ica ­
tion singly or in comb ination with other desig­
nations and oil qua lity standards.
Vi scosi ty
Eng ine oils are graded acco rding to their v is­
cosity. The prope r viscosity grade oil for your
engine depends on cl imac tic or seasonal con­
d itions where you dr ive. You can use oi l with a
viscosity grade of SAE SW40 across all tem ­
pe rat ure ranges for normal d riving conditions .
H oweve r, if eng ine oi l viscosity grade
SAE SW40 is not ava ilable, you can a lso use
Checkin g and fillin g 22 7
viscosity grade SAE 5W -30 or SAE OW-40 as
long as it meets Audi oil q uality standard
VW 502 00 (vehicles with gasoline engine) or
VW 507 00 (vehicles w ith diese l eng ine) spec­
ifications.
Because engine oil that meets the Audi oi l
standard may not be available everywhere
when you need it, we strongly recommend
that you always carry with you an extra quart
( li ter) of oil that express ly conforms to the
VW 502 00 (veh icles with gasoline engine) or
VW 507 00 (vehicles w ith d iese l eng ine) spec­
ification, in case you have to top off the oil
wh ile on the road.
App lie s to vehicle s with gasoline engin e on­
l y:
Only if the level of the o il is at or below the
minimum ma rk on the o il dipstick -and no oi l
that expressly conforms to Audi o il st andard
VW 502 00 spec ificat ions is available - may
you top off with a high quality engine o il, pre f­
erably synthetic -based, that meets ACEA A3
or API SM specificat ions, but even then, only
in v iscosity grades SAE SW-40, SAE SW-30, or
SAE OW-40. However, during the entire time
between oil change intervals, never top off
with more than a total of 0 .5 qt/liter engine
o il that does not conform to Audi o il specifica­
tion VW 502 00.
App lie s to vehicles with die sel engin e only:
Only if the level of the o il is at or below the
min imum ma rk on the o il dipstick - and no oi l
t h at exp ressly conforms to Audi o il standard
VW 507 00 spec ificat ions is available - may
you top off with a high quali ty engine o il, that
meets ACEA C3 or API CF specifications, but
even t hen, only in viscosity grades SAE
SW-40, SAE 5W-30, or SAE OW-40. However,
during the entire time between oil change in­
terva ls, never top off with more than a total
of 0. 5 qt/liter engine oil that does not con-
for m to Aud i oil spec ification VW 50 7 00.
For more information about engine oi l that
has been approved for your vehicle, please
contact e ither you r autho rized Aud i deale r or
Audi Custome r Re lations at 1 (800) 822-2834
o r vis it our web site at www.audiusa.com or
www.aud ic a nada. ca. He re you w ill also fi nd a ..,.
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