fuel AUDI A6 2017 User Guide

Warm and cold
Warm and cold
Climate control system
Description
The climate control system warms, cools and re­ moves humidity from the air in the vehicle interi­
or. It is the most effective when the windows and
sunroof * are closed. If there is a bui ld-up of heat
insid e the vehicle, ventilation can he lp to speed
up the cooling process.
I n all heating mode f unctions, except for defrost,
the blower only switches to a higher speed once
the engine coolant has reach ed a suffici ent tem­
perature .
Pollutant filt er
The po llutant filter removes poll utants such as
dust and pollen from the a ir .
Ke y recognit ion
A pp lies to: ve hicles w ith de luxe au toma tic clima te co ntro l
The blower sett ing and air distribut ion are stored
automatically and ass igned to the remote control
key that you are using.
A ppl ies to: ve hicles w ith 4 -zo ne del uxe auto matic c limate
co ntrol
The climate con trol set tings are automatically
stored and assigned to the remote control key
that is in use.
A WARNING
Poor visibility can lead to accidents.
- For safer driving, keep all windows free of
ice, snow and fog .
- Become familiar as quickly as possible with the correct use and function of the cl imate
contro l system, especially with the defrost­
ing and defogg ing function.
- When the temperat ure is below freezing,
only use the windsh ield washer system after
60
the windshield has been warmed by the cli­
mate control system. The washer fluid could
freeze on the windshie ld and impair visibi li­
ty .
Cl) Note
-If you suspect that the cl imate contro l sys­
tem is damaged, switch the system
off to
prevent further damage and have it checked
by an authorized Aud i dealer or authorized
Audi Service Facility .
- Repa irs to the Aud i climate control system
requ ire special technical knowledge and
special tools . See an authorized Aud i dea le r
or autho rized Aud i Service Faci lity .
@ For the sake of the environment
- To save fuel, turn off cooling mode by press ­
ing the
IAJC I button. This w ill also reduce
em issions .
- In veh icles w ith a diesel engine, you ca n
switch the auto supplementary heater off in
the Infotainment system.
(D Tips
- To prevent interference with the heat ing
and cooling output and to prevent the win­
dows from fogging over, the a ir intake in
front of the windshie ld must be free of ice ,
snow or leaves.
- Conde nsation from the coo ling system can
dr ip and fo rm a pudd le of water under the
vehicle. This is norma l and does not mean
there is a leak.
- Th e energy managemen t sys tem may tem­
porarily switch
off certain functions, such as
t h e seat heating * or rear window defogger.
These systems are ava ilable again as soon
as the ene rgy supply has been restored.

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" N .... 0 0 <..:l ' system can be severely damaged by driving
th rough water.
- Always swi tch the Sta rt/S top sys tem * off
when driving through wate r
r:!;> page 72.
@ Tips
-De te rmi ne the de pth befo re dr iv ing th ro ugh
w at er.
- Do no t stop the veh icle, dr ive i n reverse or
swi tch the eng ine off when dr iving t hrough
wa ter .
- K eep in mind that oncomin g ve hicl es m ay
crea te waves that raise the wate r level an d
make it too deep for your vehi cle to drive
th rough sa fely.
- Avo id d riving throu gh sal t wa ter, because
th is can ca use corros ion .
Economical and environmentally-friendly
driving
The amount of fue l consumption, the e nviron­
men tal impact and the wear to the engine ,
b rakes and ti res depends mostly on your dr iving
s tyle. W it h an anticipatory a nd econom ic dr iv ing
style , fu el consumpt ion can be reduced by ap ­
p roxima te ly 10 -15% . The following tips will help
you conse rve the environment and you r money at
the same time .
Anticipatory driving
A vehicle uses the mos t fu el when a ccele ra ting.
W hen you drive wi th an tic ipa tion, you do not
n eed to brake as often and so yo u ac celerate less .
When possib le, let your vehicle coast w ith a
gear
engaged ,
for example, when you notice that the
next tra ffic light is red. This produces an engine
braking effect, which helps to protect the brakes
and tires and reduces the emissions and fuel con­
sumpt io n to ze ro (fuel shut-off dur ing decelera ­
tion) .
Shift efficiently
An effective way to save f uel is to upshift earlier .
Staying in a gear too long uses fue l unnecessari­
l y .
Press down o n the acce lerator peda l s lowly and
avoid "k ic k -down".
D riving
Avoid full acceleration
Yo u should rarely travel at the maxi mum vehicle
speed. High speeds cause a disproport ionate ly
high increase i n fue l cons umption, emissions and
t raffic noise. S lowe r driving saves fue l.
Reduce idling time
The Sta rt-Stop system* helps to red uce the idling
t ime a utoma tically. In veh icles w ithout the S ta rt­
Stop system *, i t is eff icient to sw itch the engine
off when stopped at railroad crossings and long
r ed lights. Stopping the engine for 30-40 sec­
onds a lready saves more fuel than the amo unt of
extra fue l needed to restart the engine.
It ta kes a very long time in id le to warm the en­
gine up to operating temperature. Wear and
emissions are especially high in the warm- up
phase. Therefore, you sho uld begin driving im­
med iate ly after starting the engine. Avoid h igh
RPMs wh ile doing this .
Have maintenance performed regularly
By having maintenance pe rformed regu larly on
your vehicle, you can help to reduce fuel co n­
sumption before you even start to drive. The
maintenance condition of your vehicle not o nly
affects traffic safe ty a nd long-term val ue but al­
so impa cts
fuel consumption . A poorly main­
t ai ned engi ne ca n lead t o fuel co nsump tion that
is 1 0% hig he r th an no rmal.
Avoid short trips
The eng ine and exhaust cleaning system must
r each their optima l
operating temperature to ef­
fec tively reduce consu mption a nd emissions.
A cold engine uses a d isproportionately high
amount of fue l. The engine reac hes operat ing
temperat ure and cons umption normal izes on ly
af ter app roxima tely
2 .5 miles (4 km ).
Check the tire pressure
To save fuel, make sure the t ires are always in­
flated to the correct press ure
r:!;> page 220. The
fuel consumpt io n can increase by 5% if the pres ­
s ur e is on ly 0 .5 bar too low. Due to t he inc reased
r oll ing resistance, low tire p ressures w ill also .,..
67

Driving
lead to greater tire wear and will affect driving
behavior.
Do not drive on
winter tires year-round, as this
will consume up to 10% more fuel.
Eliminate unnecessary weight
Since every kilogram of extra
weight increases
fuel consumption, a quick inspection of the lug­
gage compartment may be worth it to avoid un­
necessary weight.
When not being used, a roof rack should be re­ moved to decrease the wind resistance of the ve­
hicle. You will save approximately 12% of your
fuel when at speeds from 62- 7 5 mph (100-120 km/h) .
Save energy
The engine drives the generator, which generates
electricity; the fuel consumption also increases
with the demand for electricity. Therefore, switch electrical equipment off when you no longer
need it. Examples of equipment that uses a lot of
energy are air blowers at a high setting, the rear
window defogger and seat heating*.
CD Note
Do not leave engine idling unattended after
starting.
If warning lights should come on to
indicate improper operation, they would go
unheeded. Extended idling also produces
heat, which could result in overheating or
other damage to the vehicle or other proper­
ty .
CD Note
- Have your vehicle maintained properly and
in accordance with the service recommenda­
tions in your Warranty
& Maintenance book ­
let . Lack of proper maintenance as well as
improper use of the vehicle will impair the
function of the emission control system and
could lead to damage.
- Do not alter or
remove any component of
the Emission Control System unless ap­
proved by the manufacturer.
- Do not alter or remove any device, such as
heat shields, switches, ignition wires,
68
valves, which are designed to protect your
vehicle's Emission Control System and other
important vehicle components.
(D Tips
The consumption estimates as published by
ENVIRONMENTAL PROTECTION AGENCY
(EPA) and Transport Canada may not corre­
spond to your actual consumption on the
road, which will vary depending upon vehicle
load and speed, road and weather conditions,
trip length, etc.
Steering
Manual steering wheel position adjustment
Applies to: vehicles with manual steering wheel adjustment
The steering wheel position is adjustable up and
down and forward and back.
Fig. 76 Lever o n the stee ring col umn
.,. Pull the lever in the direction of the arrow
¢ ,&. .
.,. Bring the steering wheel into the desired posi­
tion .
.,. Push the lever against the steering column un­
til it is secure.
& WARNING
Improper use of steering wheel adjustment
and improper seating position can cause seri­
ous personal injury.
- Adjust the steering wheel column only when the vehicle is not moving to prevent loss of
vehicle control.
- Adjust the driver's seat or steering wheel so
that there is a minimum of 10 in (25 cm)
between your chest and the steering wheel -

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" N .... 0 0 <.,;) 'SI"
-Hill hold assist cannot hold the veh icle in
place on all h ills (for example, if the ground
is slippery or icy).
- To reduce the risk of an accident, always
make sure the vehicle is situated safely
wh ile stat io nary.
Automatic transmission
Introduction
The automat ic transmission is cont rolled e lec­
tron ica lly. The tra nsmission shifts up or down au­
tomatically depending on which drive program is
selected.
When a
moderat e driving style is used, the
transmission selects the most economical driving mode. The t ransmission upshifts at a lower RPM
and downshifts at a higher RPM to improve fuel
efficiency .
The transmission sw itches to a sporty mode a fter
a kick-down or when the driver uses a
s po rt y
driving st yle
characterized by quick accelerator
pedal movements, heavy acce leration, frequent
changes in speed and traveling at the maximum
speed .
If desired, the driver can also select the gears
manually ( tiptronic mode) q page 80 .
Appl ies to : ve hicles w ith S tro nic t ran smi ssio n
The 5 tronic is a dual-clutch transmiss ion . Powe r
is transferred using two cl utches that work inde­
pendently from one another. They replace the
torque converter used in conventional automat ic
transmissions and allow the vehicle to accelerate
without a noticeab le interruption in tract ion.
A ppl ies to: ve hicles with a t iptro nic tr ansmi ssio n
Power is transfer red using a torque conver ter.
D rivi ng
Selector lever positions
Fig. 83 Instrument cl uster: selector leve r pos itions
The selector lever position that is engaged is
shown in the instrume nt cluster display .
P - Park
This selector lever position prevents the vehicle
from rolling. You can only shift into Park when
the vehicle is
stationary q &. .
To shift in and out of the P selector lever posi ­
tio n, press the inter lock b utton in the selector
lever
while pressing the brake peda l. Th is only
works when the ign ition is turned on.
R- Reverse
Only s hift into reve rse gear when t he vehicle is
stationary and the engine is running at idle
speed
q &. .
To se lect the R selector leve r pos ition, press the
in terlo ck button
while pressing the brake pedal
at the same time. The back-up lights switch on in
the R position if the ignition is switched on .
N -Neutral
T he tra ns m ission is in idle in th is posi tion
q &_ .
DIS -Normal position for driving forward
In the D/S se lector lever position, the t ransmis ­
s io n can be operated e ither in the normal D mode
or in the 5 spo rt mode . To select the 5 sport
mode, pull the selector leve r ba ck briefly . Pu llin g
t h e lever ba ck aga in will selec t the normal D
mode. The instr ument cluster disp lay shows the
selected driving mode .
77

Check ing and F illing
Checking and Filling
Gasoline
Fuel supply
Applies to: vehicles with gaso line engine
Using the right fuel helps keep the environment
clean and prevents engine damage.
F u el r eco mmend ati on
The fuel recommended for your vehicle is unle ad­
e d pr em ium
grade gasoline . Audi recommends
using TOP TIER Detergent Gasoline with a mini­
mum octane rating of 91 AKI (95 RON). For more
information on TOP TIER Detergent Gasoline,
p lease go to the offic ial website
(www.toptiergas .com).
The recommended gasoline octane rating for
your engine can also be found on a label located on the ins ide of the fuel filler flap . This rating
may be specified as AK I or RON .
Your veh icle may also be operated using unlead­
ed regular gasoline with a minimum octane rat ­
ing of 87 AKl/91 RON. However, using 87 AKI/91
RON octane fuel w il l slightly reduce engine pe r­
forma nce.
Us e un leade d gaso lin e onl y. Unleaded gasoline
is availab le throughout the USA , Canada, and in
most European countries . We recommend that
you do not ta ke your vehicle to areas or co unt ries
where un leaded gaso line may not be availab le.
For more information on refueling your vehicle,
see
¢page 192.
Octan e rating
Octane rating indicates a gasoline's ability to re­
sist engine damaging "knock" caused by prema­
ture ignit ion and detonation . Therefore, buy ing
the correct grade of gasoline is very important to
he lp prevent poss ible engine damage and a loss
of eng ine performance.
Gasoline most commonly used in the Un ited
States and Canada has the following octane rat­
i n gs that ca n usually be found on the filler pump:
- Premium Grade: 91 - 96 AKI
190
- Regu la r Grade: 87 - 90 AK I
Explanation of the abbreviations:
AKI = Anti Knock Index = (R +M)/2 = (RON +MON)/
2
RON = Research Octane Number
MON = Motor Octane Number.
{[) Note
-Do not use a ny fue l w ith o ctane ratings low­
er than 87 AKI or 91 RON othe rw ise expen­
sive engine damage wi ll occur .
- Do
not use leaded gasoline. The use of lead­
ed gasoline will severely damage your vehi­
cle's catalyt ic converter and its ability to
control exhaust emissions .
Blended gasoline
Applies to: vehicles with gasoline engine
Use of gaso lin e conta ining alcoho l or MTBE
(meth yl tertia ry butyl ether )
You may use unleaded gasoline blended with al­
cohol or MTB E (commonly referred to as oxygen ­
ates) if the blended m ixture meets the follow ing
criteria:
Blend of g asoline methanol (wood alcohol o r
m eth yl alcoho l)
-Anti -knock index must be 87 AKI or h igher.
- Blend must contain no more than 3% metha-
nol.
- Blend must contain more than 2% co -solvents.
Blend of ga soline and ethanol (grain alcohol or
ethyl alc ohol )
- Anti-knock index must be 87 AKI or h igher .
- Blend must not conta in more than 15% etha-
nol.
Blend of gas oline and M TBE
- Anti-knock index must be 87 AK I or h igher .
- Blend must contain not mo re than 1S% MTB E.
S easonall y adjusted gasoline
Many gasoline grades are blended to perform es­
pecially well for winter or summer dr iv ing . Dur-
i ng seasonal change-over, we suggest that you .,..

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" N .... 0 0 <..:l ' fill up at busy gas stations where the seasonal
adjustment is more likely to be made in time .
(D Note
-Methanol f uels which do not mee t these re­
quirements may ca use corrosion and dam­
age to plastic and rubber components in the
fuel system.
- Do not use fuels that fai l to meet the speci­
fied criteria in this chapter.
- If you are unable to determine whether or not a particular fuel blend meets the speci­
fications, ask your service station or its fuel
supplier.
- Do not use fuel for which the contents can­
not be identif ied.
- Fuel system damage and performance prob­
lems resulting from the use of fue ls differ­
ent from those specified are not the respon­
s ibility of Audi and are not covered under
the New Veh icle or the Emiss ion Control
System Wa rrant ies.
- If you experience a loss of fue l economy or
driveability and performance problems due
to the use of one of these fuel b lends, we
recommend that you switch to unblended
fuel.
Gasoline additives
A ma jo r concern among many auto manufactur ­
e rs is carbon deposit build-up caused by the type
of gasoline you use.
A lthough gasoline grades d iffer from one manu ­
facturer to ano ther, they have certain things in
common . All gasoline grades contain substances
that can cause deposits to collect on v ita l eng ine
parts, such as fuel injectors and intake valves. Al­
though most gasoline brands include additives to
keep engine and fuel systems clean, they are not
equally effective.
Audi recommends using TOP TIER Detergent Gas­
oline. For more informat ion on TOP TIER Deter­
gent Gasoline, please go to the official website (www .toptiergas .com) .
Check ing and Filling
After an extended period of using inadeq uate
fuels, carbon deposit bui ld-ups can rob your en­
gine of peak performance.
(D Note
Damage or ma lf u nction due to poor fuel qual ­
ity is not covered by the A udi New Vehicle
Limited Warranty .
Diesel fuel
Applies to: vehicles with diesel engine
Always use ULSD (Ultra Low Sulfur Diesel) No. 2 .
The ULSD No . 2 meets the ASTM 0975.
Diesel fuel w it h concentrations of b iod iesel h igh­
er than 5 % such as Bl 1, B20 or BlOO are strict ly
prohibited .
Se rvice station fuel p umps are labe led with the
correct f uel info rmation for e asy recog nition by
the user.
If the d iesel fue l pump is not labeled
ask the station operator what fuel is being dis­
pensed before fil ling up your vehicle .
UL SD No . 2 m ay not be available ou tside the USA
and Canada . Be sure to check befo re t raveling to
other countries .
UL SD No . 2 can become thic ke r i n ve ry cold tem­
peratures, and th is can imp air the engine's s tart ­
ing and running. Depend ing on the sea son, gas
stations provide ULSD No . 2 that flows better in
cold temperatures so that you can continue oper ­
at ing your vehicle as usual.
@ Note
- Your vehicle's diese l engine was designed
soley for use with ULSD No . 2 . Therefore,
neve r use gasoline, heating oil, other fuels
or flow improvers. These contain substances
that will severely damage the fuel system
and the engine . Such damage will not be
cove red by your New Vehicle Limited War­
r a nty.
- If you put a ny amo unt of incorrect fuel in
the fuel tank, do not sta rt the eng ine under
any circumstances. Imme diately contact the
nea res t a uthor ized Audi dealer or author­
ized Aud i Serv ice Facility fo r ass istance .
191

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 .

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" 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,,