2017 AUDI A4 engine

Checking and Filling
any circ umstances. Immediately contact the
nearest author ized Audi dealer or author­
i zed Audi Service Facility for assistance .
These fuels 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 right rear
s ide pan el behind the fu el filler flap .
I f the power locking system should fail, you can
still open the flap manua lly -for detai led instruc­
tions see
c::> page 300.
You can find the fuel tank capac ity of you r vehicle
in
c::> page 362 .
The label on the inside of the fuel filler flap tells
you the correct fue l for your vehicle . For more in­
formation about fue l specifications , see
c::> page 296 .
Your veh icle fuel tank has an onboard refuelling
vapor recovery system . This feature he lps to pre­
ve nt fuel vapors from escap ing from the tank and
pollut ing the e nvironment while yo u re fuel your
veh icle. In order to fi ll the tank properly while
protecting the environment, please fo llow this
r e fu eling procedure carefu lly.
& WARNING
Under normal operating conditions, never car­
ry additiona l fuel containers in yo ur car. Gas
canisters and other conta iners used to trans­
port fuel can be dangerous . S uch containers,
full or empty , may lea k and could cause a fire
in a collision. If yo u m ust t ransport fue l to
use for yo ur lawn mower, snow blower, etc.,
be very careful and a lways obse rve loca l and
state laws regard ing the use, t ransportation
and sto rage of such fue l conta iners. Make cer­
tain the container meets industry standards
(ANSI/ASTM F852 -86).
(D Note
Never drive yo ur vehicle unt il the fuel tan k is
comp letely empty . The irregular supply of
298
fu el can cause misfiring. Gasoline could ente r
the exhaust system and damage the catalytic
converter.
Fueling procedure
F ig . 239 Righ t rea r side of th e ve hicl e: op enin g the fue l
fi ller door
Fig. 2 40 Fuel fille r doo r wit h attached fuel c ap
The fuel filler doo r is unlocked or locked by the
cent ral lock ing system .
Opening the fuel cap
.. Press the left side of the fuel f iller doo r to open
i t
c::> fig. 239 -arrow-.
.. Unscrew the tank cap counterclockwise .
.,.. Place the cap from above on the open fuel filler
door
c::> fig . 240 .
Closing the fuel cap
.. Turn the fuel cap to the right until it stops.
.. Close the fuel filler door until i t latches.
Onc e the pump noz zle sw itches
off, the fuel tank
is "full ". Do not fill the tank more . Otherwise , the
expans ion space in the tank w ill be filled.
The correct fuel type fo r your ve hicle can be
fo und o n a label located on the inside of the f uel
IJJ,

<( a, .... N ,....
N .... 0 0
3 a,
filler door. For additional information on fu el,
r e fer to ¢
page 296.
For the tank capac ity in yo ur vehicle , refer to the
Te chn ical D ata
¢ pag e 362 .
To avoid fuel spill ing or evaporating from the fuel
tank always close fuel cap p roperly and com­
p letely . An improperly closed fue l filler cap may
a lso cause the MIL lamp¢
page 25 to come on .
A WARNING -
Not paying attention when fueling or han ­
dling fue l incorrectly can lead to fires, exp lo ­
sions or serious injuries.
- Fuel ignites easily and can cause serious
burns and other injuries.
- If you do not switch the engine off when fu ­
eling and/or do not insert the fuel nozz le
completely into the tank opening, fue l can
leak out or run over . Leaked fuel can ignite
and start a fire .
- Do not use the telephone whi le fueling. The
electromagnetic rays can cause sparks,
wh ich can ignite fuel vapors and start a fire .
- Do not sit in your vehicle while fueling. If
you must make an except ion and enter your
vehicle again wh ile fueling , close the door
and touch meta l to discharge static electric­
ity befo re touching the fue l nozzle . Static
elect ricity can create spar ks, wh ich can ig ­
nite vapors when fue ling.
- Do not smoke or have an open flame in the
area when fueling your veh icle or filling a
fuel contai ner because th is increases the
risk of an explosion .
- For yo ur safety , carrying f uel containers in
yo ur vehicle is no t recommended. Whethe r
f ull or empty, the conta iner 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 container 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 r isk of an explos ion.
- Always p lace a fuel container on the
g ro u nd before fi llin g.
Ch eck ing and Filling
-Always hold the fuel nozzle completely in
the fuel container when 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 fuel in the vehicle or the lug­
gage compartment . Evaporated fuel is ex­
plosive and increases the risk of serious in­
jury or death .
- Follow lega l requirements when using,
stor ing and transporti ng fuel containers .
- Make sure the fuel container conforms to
industry standards (ANSI/AS TM F8S2 -86).
@ Note
- Remove spilled fuel from vehicle pa int im­
mediately, because it can damage paint.
- Never drive until 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 the exhaust
system and increase the risk of damage to
the catalytic converter .
- If the fuel tank runs complete ly empty in a
vehicle with a diesel engine , the ignition
must remain switched on fo r at least 30
seconds afte r ref ueli ng before starting the
eng ine. It may take longer than usual fo r
t he engine to s tart, even up to a minu te .
T his is because the air must first b leed out
of the fue l system when starting the eng in e.
@ For the sake of the environment
Do not overfill the fuel tank, otherwise fuel
can leak out when the vehicle is warming up.
(D Tips
D iesel ve hicles are eq uipped w ith a diesel mis­
fueling guard .
It allows the vehi cle to be fu­
eled on ly with a diesel fuel pump nozzle. A
worn or damaged nozzle or a nozzle that is
too small may not be able to open the diese l
misfueling guard. If this is the case, try turn­
i ng the nozzle before inserting it in the fue l
filler tube, use a different fuel p ump or see an
Iii>
299

Checking and Filling
authorized Audi dealer or authorized Audi
Service Facility for assistance.
Fuel filler door emergency release
If the central locking system is faulty, the fuel
filler door can be unlocked manually.
Fig. 241 L uggage compartment: opening the side t rim
panel
F ig. 242 luggage compartment: fue l fi ller doo r emergency
r elease
The emergency opening mechanism is located
behind the right side trim panel in the luggage
compartment.
• Open the cover in the side panel
¢fig. 241.
• Loosen the loop c> fig. 242 from the retainer
and then pull on the loop carefully
c>0 . The
fuel filler door releases.
• Press on the left side of the fuel filler door to
open it
¢page 298, fig. 239 .
(D Note
Only pull on the loop until you feel resistance .
You will not hear it release. Otherwise you
could damage the emergency re lease mecha­
nism .
300
Selective catalytic
reduction (AdBlue)
General information
Applies to: vehicles with selective catalytic reduct ion
In vehicles with selective catalytic reduction, a
urea solution (AdBlue) is injected into the ex­
haust system before a nitrogen oxide cata lytic
converter to reduce nitrogen emissions.
The Ad Blue is carried in a separate tank in the ve­ hicle. The Ad B lue usage accounts for approxi­
mately 1.0% to 2.5% of the diesel fuel that is
used.
When a message about refi lling the AdBlue ap­
pears in the instrument cluster display, you must
ref ill the Ad B lue yourself or have it refilled by an
authorized Audi dealer or authori zed Audi Service
Facility
c> page 301.
(l} Tips
- The d isp lay indicates the distance rema ining
that can be driven¢
page 300. If the Ad Bl­
ue tank is completely empty, the engine will
not start again after the ignition is switched
off .
- Ad Blue is required by law to operate th is ve­
hicle.
Messages in the instrument cluster display
App lies to: vehicles with selective cata lytic reduction
The display indicates if the Ad Blue level is low or
if there is a system malfunction .
Ad Blue level low
You will be informed in the instrument cluster
display if the Ad Blue in the tank drops below a
certain level. Add at a minimum the amount of
Ad Blue shown in the message:
• Refill with at least x qt (l) Ad Blue . Range
x mi (km)
This message appears when there is only enough
AdBlue left to drive the distance indicated in the
instrument cluster. Fill the AdBlue.
• Refill with at least x qt (I) AdBlue . No en­
gine start in x mi (km ). See owner's manual

This message appears when there is only enough
Ad Blue left to drive the distance indicated in the i nstr ument cluster . Fill the Ad Blue. Otherwise
the eng ine will not start aga in if you stop it once
the distance indicated has been dr iven .
• Refill with at least x qt (l) AdBlue. Engine
start not po ssible . S ee owner 's m anual
This message appears when the AdBlue ta nk is
empty. Fill the AdB lue . Otherwise you will not be
ab le to start the engine agai n once yo u stop it.
The AdBl ue m ust be refilled when the amoun t in
the tank has reached the minimum level
c::> page 301, Preparation .
Incorrect filling/system malfunction
A message appears if the Ad Blue tank was filled
with a f luid other than Ad Bl ue and the system
h as detec ted that the t ank was fi lled incor rect ly,
or if there is a system malfunc tion .
II Ad Blue: malfunct ion! No engine start in
x mi (km ). See owner's manual
This message appears when it is only poss ible to
drive the d istance indicated in the instrumen t
cluster . Drive to the nearest authorized A udi
deale r or autho riz ed Aud i Serv ice Facility to have
the m alfunction co rrected. Otherwise the engine
w ill no t start aga in if you stop it once the d is­
tance indicated has been driven .
• Ad Blue : malfun ction! No engin e start poss i­
ble. See owner' s manual
This message appea rs if the system has detected
that the tank was filled inco rrectly or that there
is a malfunction . D rive immediately to the near­
est a utho riz ed Aud i dea ler o r authorized Audi
Service Fa cili ty to have the malfunction correct­
ed . Otherwise you will not be able to start the en­
gine again once you stop it.
Checking and Filling
Preparation
Applies to: vehicles with selective cata lytic reduction
Fig. 243 Right rear s ide o f th e ve hicle: removing t he Ad Bl­
u e cap
The Ad Blue tank ope ning is located near the d ie­
se l tank opening. Add at least 1.5 gallons (5. 7
L)
of Ad Blue. This is the minim um amount required
to ensure the system detects the refilling and to
start the engine. You can add a maximum of 6.3 gallons (24 L).
Requireme nt: the request to add Ad Blue must
appea r in the instrument cluster disp lay.
.,. Switch the ignit ion off.
.,. Open the tank filler doo r
c::> page 298.
.,. Tu rn the tank filler neck cap to the left to re­
move
c::>fig. 243.
.,. Refill Ad Blue using a bottle c::> page 302, a can­
ister
c::> page 302 or a pump nozzle
c::> page 303 .
A WARNING , ~ -Ad B lue can irritate the sk in, eyes and respira­
tory sys tem.
If th ere is contact with the flu id,
flus h immed iate ly w ith plenty of wa ter. Con­
su lt a phys ician if necessary.
(D Note
- Only use Ad Blue that conforms to the
standard ISO 22241-1. Do not m ix any addi­
tives with the Ad Blue and do not dilu te it
w ith wate r.
- Do not add AdBl ue to the diesel tank or add
diese l fuel to t he A d Bl ue tank. Do not s tart
t he engine un de r any c ircumst ances if th e
wrong fuel is filled in the tan k. There is a
r is k of damaging the fue l tank system and
301

Checking and Filling
the engine. See an authorized Audi dealer or
authorized Audi Service Facility for assis­
tance.
- Ad Blue 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 . Ad Blue 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 Ad Blue to come into contact
with clothing.
If there is contact with the
fluid , flush immediately with plenty of wa­
ter.
(D Tips
Follow the Ad Blue manufacturer 's instruc­
tions for use and storage.
Refilling AdBlue using the bottle
Applies to: veh icles with selective catalyt ic reduction
.. Remove the cap from the refill bottle¢ A in
Preparation on page 301,
~ CD in Preparation
on page 301.
.. 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
¢ page 303, Completing AdBlue refill.
(D Note
Only use refill bottles that are approved for
your vehicle. Using other systems can cause
Ad Blue to leak.
(j) Tips
- You can obtain refill bottles from an author­
ized Audi dealer or authorized Audi Service
Facility.
302
- 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 catalyt ic reduct ion
@
+®
Fig. 244 Canis te r w ith attachable hose
.,. Remove the cover from the refill canister ¢ A
in Preparation on page 301, ¢(Din Prepara­
tion on page 301 .
.. Secure the end of the hose (Don the opening in
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
is empty or until no more fluid flows into the
tank .
.. Remove the canister and close the filler tube
¢ page 303, Completing AdBlue refill .
([) Note
Only use refill canisters that are approved for
your vehicle. Using other systems can cause
AdBlue to leak.
(D Tips
- An authorized Audi dealer or authorized
Audi repair facility can tell you which refill
canisters are approved for your vehicle .
- A permitted refill canister contains approxi­
mately 1.3 gallons (5 liters) of Ad Blue.

Refilling AdBlue using a pump
Appl ies to: ve hicles with selective cataly tic reduction
"' Open the tank fi ller door ¢ page 298, fig. 239 .
.,. Turn the tank filler neck cap to the left to re­
move
¢ page 301, fig. 243 .
.,. Refill Ad B lue until the pump nozzle switches
off for the first time
¢ (D.
.,. Close the filler neck. ¢ page 303, Completing
AdBlue refill
(D Note
- The pump nozzle handle must be pointing
downward when fill ing . Otherwise the
pump nozzle w ill not sw itch off automat i­
cally
¢ @ in Preparation on page 301.
-Do not continue filling once the pump noz­
zle automatically switches off for the first
time . The AdBlue tank system cou ld be
ove rfilled and leak Ad B lue
¢(Din Prepara­
tion on page 301.
Completing AdBlue refill
A pp lies to: ve hicles with selective ca ta ly tic reduc tion
Closing the filler neck
.,. Turn the Ad Blue cap to the right on the filler
tube u ntil the cap cli cks into place ¢.&.
in
Preparation on page 3 01,
¢ d) in Preparation
on page 301.
.,. The n press on the left side of the tank door un-
t il it latches.
After filling
The vehicle mus t be driven so that the system
r ecognizes that the Ad Bl ue was refille d. Thi s can
take severa l min utes .
.,. If there was no Ad Blue left in the tank a nd a
ra nge of O mi (0 km) was shown in the display ,
switch the ig nition on for about 30 seconds be­
f ore star ting the engine .
(D Tips
Ad Blue in the tank can free ze at very low tern-
; pe ra tures. If this happens, the system will
~ not detect that the Ad Bl ue was refilled and it N
8 wi ll continue to inform you of the low Ad Blue 0
3 Ch eck ing and Filling
level. The message t urns off as soon as the
tank thaws out again .
Emissions control
systems
Catalytic converter
Applies to vehicles a with gasoli ne engine : the
vehicle may only be driven with unleaded gaso­ li ne, otherwise the cata lytic converter will be de­
stroyed .
Never dr ive until the tank is complete ly empty.
The irregu lar supply of fuel that resu lts from that
can cause eng ine misfires. Uncombusted fue l will
enter the exhaust system, which can cause over­
hea ting and damage to the cata lytic converter .
Diesel particulate filter
Applies to vehicle s with a diesel engine : the die­
sel part icu late filter filters nearly all of the soot
particles out of the exhaust. The f ilter cleans it­
self automatically under normal dr iv ing cond i­
t ions .
If the filter cannot clean itself (fo r exam­
ple, bec ause you are only d rivi ng short distan­
c es), the filte r becomes clogged wi th soo t and
t h e
Cl indica to r li gh t for the diese l part icu late
filter turns on ¢
page 34.
A WARNING
The temperat ure of the exhaust system is
h igh, both when driv ing and after stopping
the eng ine.
-
- Never touch the exhaust tail pipes once they
have become hot. This cou ld res ult in burns.
- Do not park your veh icle over flammable
materials such as grass or leaves because
the high temperature of the emissions con­ trol system (catalytic converter or d iesel
pa rtic ulate filter) could start a fire.
- Do not app ly underbody protectant in the
exhaust system area , beca use this increases
the r isk of f ire.
303

Check ing and F illing
Engine compartment
Working in the engine compartment
Special care is required if you are working in the
engine compartment
Fo r wo rk in th e engine compa rtmen t, s uch as
c h ec kin g and filli ng flu id s, th ere is a risk of in­
j u ry, sc aldin g, ac cide nts, a nd b urn s. For this
rea son, foll ow all the warning s and gener al
s a fe ty p recaution s pr ov ided in the f ollow ing in·
f o rm ation . Th e en gine c omp artmen t is a dan ­
ger ous are a.
¢ ,&.
_& WARNING
- T urn the engine off.
- Switch the ign ition off .
- Set the parking brake .
- Select the P selector lever pos ition .
- let the engine cool down.
- Never open the hood if you can see steam or coolant escaping from the engine compart­
ment, because th is increases the r isk of
burns . Wait until no steam or coolant is es­
caping .
- Keep ch ildren away from the engine com­
partment .
- Never spill flu ids on a hot engine. These flu­
ids (such as the anti -freezing agent con ­
ta ined in the coolant) can ignite .
- Avoid short circu its in the electrical system,
especially to the battery .
- When working in the engine compartment,
remember that the rad iator fan can sw itch
on even if the ign ition is switched off, which
increases the risk of injury .
- Never open the cap on the coolant expan­ sion tank when the eng ine is warm. The
cooling system is under pressu re .
- To protect your face, hands, and arms from
hot steam or coolant, cover the cap with a
large cloth when opening.
- Do not remove the engine cover under any
circumstances. This increases the risk of
burns.
- If tests need to be performed w ith the en­
gine running, there is additional danger d ue
304
to moving components (such as the ribbed
be lt, alternator and rad iator fan) and from
the high-voltage ignition system.
- Do not under any circumstances activate the
throttle inadvertently (for example, by hand
from the engine compartment) if the vehi­
cle is stat ionary but the eng ine is running
and a gear is engaged . Otherwise, the veh i­
cle will start to move immediately and this
could result in an acc ident.
- Pay attent ion to the following warnings list­
ed when wor k on the fue l system o r on the
electrical equipment is req uired.
- Always disconnect the vehicle battery
from the vehicle electrical system.
- Do not smoke .
- Never work near open flames.
- Always have a working fire extinguisher
nearby
- To reduce the r isk of e lectr ic shock and in­
jury, never touch the follow ing components
when the engine is running or is being start ­
ed:
- Ign ition cable
- Other components in the electronic high-
voltage ign ition system
- If you must check or perform work on the engine whi le it is running:
- Set the parking brake and place the selec­
tor lever in the P (park) pos ition first.
- Always proceed w ith extreme cau tion so
that clothing, jewelry or long hair do not become ca ught in the rad iator 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 .
- Limit your exposure to exhaust and chemi­
cals to as short a time as possible¢.&. .
_& WARNING
California Proposition 65 Warning :
- Engine exhaust, some of its constituents,
and certa in vehicle components conta in 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
reproduct ive harm.
- Battery posts, terminals and related acces­
sories contain lead and lead compounds,
chem icals known to the State of California
to cause cance r and rep roductive harms.
Wash hands after handling.
(D Note
When filling flu ids, be sure not to mix the flu­
ids up . Otherwise severe ma lfunctions and en­
gine damage w ill occur.
@ For the sake of the environment
You should regularly check the grou nd under
your veh icle in order to detect Leaks qu ickly . If
there are v isible spots from oil or other fluids,
bring your vehicle to an authorized Aud i dea l­
er or authorized Audi Service Facility to be
checked.
Opening the hood
The hood is released from the interior.
F ig. 2 45 Dri ver fo otw ell : rele ase leve r
Checki ng an d Fill in g
Fig. 246 Unlocke d hood: lever
Make sure the wiper arms are not raised up from
the windshield. Otherwise the paint could be
damaged .
.,. With the driver's door open, pull the lever be­
low the instrument pane l in the direction of the
arrow
c;> fig. 245 .
.,. Raise the hood slightly c;> ,&. .
.,. Press the lever c;> fig. 246 in the direct ion of the
arrow. This releases the hooks .
.. Open the hood .
A WARNING
-
Never open the hood if you can see steam or
coolant escaping from the engine compart­ ment, because this increases the risk of
burns. Wait until no steam or coolant is es­
cap ing .
Closing the hood
.,. Push the hood down until you override the
force of the str uts .
.,. Let the hood fall lightly into the latch .
Do not
press it in.
c;> &_ .
A WARNING
-===
If the hood is not latched complete ly, it could
fly up wh ile you are driving and obstruct your
vis ion.
- For safety reasons, the hood must always be
closed securely while driv ing. Because of
this, always check the hood after closing it
to make sure it is latched correctly . The
hood is latched if the front corners cannot
be lifted.
~
305