2017 AUDI A4 engine compartment

<( a, .... N ,....
N .... 0 0
3 a,
(!) side assist displays, warning abo ut
exiting the vehicle ..... ... .. .. .
@ Door handle
@ Cent ral locking switch ....... .. .
@ Memory buttons ........... .. .
® Vent
® Thumbwhee l for vent
(J) Lever for:
- T urn signals and h igh beams
- Headl ight assistant ......... .
- Active lane assist .. ..... ... . .
- Congestion assist ....... .. .. .
@ Mul tifunction steer ing wheel with:
- Horn
- Driver's airbag . ..... ... .. .. .
- Drive r information system con -
t rols .. .. ............. .. .. .
- Audio/v ideo, telephone, nav iga­
t ion and voice recognition con-
trols . ... .... .. .... ... .. .. .
- Button ~/steering wheel heating
- Sh ift paddles .............. .
® Instrument cluster ....... .. .. .
@
@
@
@
~
@
Reset trip odometer ........ .. .
W indshie ld w asher system lever
Emergency flashers .... ... .. .. .
Knee a irbag ........ ... .. ... . .
Adjustable steer ing column
Lever for:
- Cruise cont rol system ..... .. .
- Adaptive cruise cont rol .. ... . .
@ Instrument i llum ination ... .. .. .
@ Data link connector for On Board
Diagnostic System (OBD II) .. .. .
@ H ood release . ........... .. .. .
@ Button for switching the Head-up
d isplay on/off, adjust ing the
height .. .. ............... .. .
@ Lig ht switch ............... .. .
@ Buttons for :
- All weather lights
llS
41
63
5 1
5 1
112
104
25 7
12, 15
14, 15
1 4
86
10
12
56
53
269
75
93
96
54
25
305
23 50
50
Coc kpit o ve rv iew
-Rear fog lights .. .. .. ..... .. .
@ Switch for luggage compartment
li d .... ... .. .. .. .... .. ... .. . .
@ Power exterior m irro r adjustment
@ Power windows .............. .
@ Parental cont rol ............. .
@ Infotainment system dis play . .. .
@ Lockable glove compartment ... .
@ Drives for CD, DVD, SI M cards .. .
@ Front passenger's airbag .... .. .
@ Valet Park ing funct ion ........ .
@ Climate cont ro l system ........ .
@ Depend ing on equ ipment, buttons
for:
- drive select .. .. ............ .
- Start/Stop system . ... ... .. . .
- Electronic Stabilization Control
(ESC) ..... .. .. ... ....... .. .
- Parking system . .... . ..... .. .
- Switching the Infota inment sys-
tem disp lay on/off .......... .
@) Socke t ... .. .. .. ............ .
@ Cup holder . ... .. .... . ..... .. .
@ Infotai nment system on/off
button ... .. .. .. .... .. ... .. . .
@ Center armrest w ith sto rage com­
partment . Depending on vehicle
equipment, it may have:
- Aud i m usic interface ........ .
@ starting the engine when the re is a
ma lfunction .. ... .... . ..... .. .
@ E lectromechanical parking brake
@ Automa tic transmission se lector
lever ... .. .. . ... ............ .
@ Infotainment unit ............ .
@ I START EN GIN E STOP ! ........ .
(D Tips
50
43 54
45
45
142 64
2 10
257 47
68
121
78
135
124
142
64
64
141
215
78
81
83
141
76
Some the equipment listed here is only instal ­
l ed in certa in models or is available as an op-
tion .
9

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Please relea se parking br ake
Re lease the par king brake if this message ap ­
pears .
Please press brak e pedal to r ele as e par king
brake
To release the parking brake, press the brake
pedal and press the~ button at the same time,
or start driv ing with hill start ass ist
¢ page 82,
Starting from a stop .
(D Tips
For additional information on the parking
brake, refer to ¢
page 81.
_L Cooling system
• Turn off engin e and che ck co olant le vel.
The coolant level is too low.
Do not continue driving and switch the engine
off. Check the coolant level ¢
page 310.
-If the coolant leve l is too low, add coolant
~ page 310. Only continue driv ing once the in­
dicator light turns off.
• Coolant temperature : to o high . Let engine
run with vehicle s tati onar y
Let the eng ine run at idle for a few minutes to
cool off, until the ind icator light tu rns off.
- If the indicator light does not turn off, do not continue driving the vehicle. See an author ized
Audi dealer or author ized A udi Se rvice Facility
for assistance.
_& WARNING
- Never open the hood if you ca n see or hear
steam o r coolant escaping from the engine
compartment. This increases the risk of
burns . Wait until you no longer see or hear
steam or coolant escap ing .
- The engine compartment in any veh icle can
be a dangerous area. Stop the engine and
allow it to cool before working in the engine
compartment. A lways follow the informa­
t io n found in
¢ page 304, Working in the
engine compartment.
Coc kpit o ve rv iew
(D Note
Do not continue driv ing if the . indicator
light turns on as this increases the risk of en­
gine damage.
~ -Safety belt
The . indicator light stays on until the dr iver 's
and front passenger's safety belts are fastened .
Above a certa in speed, there will also be a war n­
ing tone.
@ Tips
For additional informat ion on safety belts, re ­
fer to¢
page 245 .
0 Generator/battery
If the . or(•) indicator light t urns on , the re is a
malfunction in the generator or the vehicle e lec­
t rical system .
• Electric al sy stem: malfunction! Saf ely stop
v e hicle
Do not continue dr iving and switch the engine
off . See an authorized Audi dealer or authorized
Audi Se rvice Facility for assistance .
(•j Electrical system: mal function! Re start not
po ssible . Plea se co ntac t Se rvice
Disconnecting the vehicle battery from the elec­
trical system prevents it from d ischarging. Drive
to an authori zed Aud i dealer or authori zed Aud i
Service Facility immed iately .
Do not stop the engine, or you w ill not be able to
start it again. If you can no longer start the en­ gine, see an authori zed Audi dealer or autho riz ed
Audi Service Facility for assistance .
(•) Electri cal system: malfunction! Ple ase con­
tact Se rvice
Drive to an authori zed A udi dealer or authorized
A udi Service Facility immediate ly. Because the ve­
hicle battery is discharging, turn off a ll unneces­
sary electrical equipment such as the rad io. See
your authori zed Aud i dealer or authori zed Audi
Service Facility if the battery charge level is too
~w . ~
31

Driving
next traffic light is red . This produces an engine
braking effect, which helps to protect the brakes
and tires and reduces the emissions and fue l con ­
sumpt ion to zero (fuel shut-off during decelera­
t ion).
Shift effici ently
An effective way to save fuel is to upshift earlier.
Staying in a gear too long uses fue l unnecessari ­
ly .
P ress down o n the acce lerator peda l slowly and
avoid "kick -down".
Avoid full acceleration
You shou ld rare ly t rave l at the maximum vehicle
speed. High speeds cause a disp roportiona tely
h igh inc rease in fuel consump tion, emissions and
traffic no ise . Slower driving saves fuel.
Reduce idling time
The Start/Stop system* he lps to reduce the idling
time automatically. In vehicles witho ut the Start/
S top system* , it is efficient to swit ch the eng ine
off when stopped at r,;1ilro,;1d crossi ngs and long
red lights . Stopping the engine for 30 -40 sec ­
onds already saves more fuel than the amount of
extra fuel needed to restart the engine.
It t akes a very long time in idle to war m the en ­
g ine up to opera ting tempera ture . Wea r and
emissions are especially high in the warm -up
p hase . Therefore, yo u should begin driving im ­
mediately after starting the engine. Avoid high
RPMs while do ing th is.
Have maintenance performed regularly
By having ma intenance performed regularly on
your vehicle, you can help to reduce f uel con­
sumpt ion befo re yo u even start to dr ive. The
maintenance condition of your vehicle not only
affects t raffic safety and long-term value but a l­
so impacts
fuel consumpt ion . A poorly main ­
tained engine can lead to f uel consumption that
is 10% higher than normal.
Avoid short trips
The engine and exhaust cleaning system m ust
reach the ir opt imal
operating temperature to ef­
fectively reduce consumption and em iss ions.
74
A cold engine uses a d isproportionately high
amount of fue l. The engine reaches operating
temperat ure and cons umption norma lizes on ly
after approximate ly
four ki lometers.
Check the tire pres sure
To save fue l, make sure the t ires are always in­
flated to the correct press ure
¢ page 32 7. The
fuel consumpt ion can increase by S% if the pres ­
s u re is only 0.5 bar too low. Due to the increased
roll ing resistance, low tire pressures w ill also
l ead to greater tire
wear and will affect dr iving
behavior.
Do not drive on
winter tires year-round, as this
will consume up to 10% more f uel.
Eliminate unnecessary we ight
Since eve ry kil og ram o f extra weight in creases
fuel consumption, a quick inspection of the lug­
gage compartment may be worth it to avoid un­
necessary we ight.
When no t be ing used, a roof rack sho uld be re ­
moved to decrease the wind resistance of the ve­
hicle . You will save approx imately
12% of your
fuel when at speeds from 62-75 mph (100-120 km/h).
Save energy
The eng ine drives the generator, which generates
electricity; the fuel consumption also inc reases
with the demand for e lectricity. Therefore, switch
e lectrical equ ipment off when you no longer
need it. Examples of eq uipment that uses a lot of
energy are air blowers at a high setting, the rear
window defogger and seat heating* .
(D Note
Do not leave engine idling unattended after
starting . If warning lights shou ld come on to
i ndica te improper operation, they would go
unheeded . Extended idling also prod uces
h eat, w hic h could result i n overheating o r
o ther damage to the veh icle o r othe r prope r­
ty .

<( a, .... N ,....
N .... 0 0
3 a,
briefly or press and hold for longer than two sec ­
onds.
A WARNING
- Never t urn off the engine before the veh icle
has come to a comp lete stop.
- Please note that the brake booster and pow­
er steering on ly work when the engine is
running. When the engine off, you must use
more force to steer or b rake the ve hicle. Be­
cause the usual steering and brak ing capa ­
b ili ty is not ava ila ble, the risk of accid ents o r
injuries i ncre ases .
- For safety reasons, always park the vehicle
with the se lector lever in the P position .
Ot herwise, the re is the r is k t hat the vehicle
c o ul d roll uninten tion ally.
- After the engine h as bee n sw itched off, the
r adi ator fan c an con tinue to run for up to
1 0
m inu tes -even wi th the ig nition switche d
o ff . I t can a lso switch on again after some
t ime if the coolant temperature rises as the
result of heat buildup or if t he engine is a l­
ready warm and the engine compartment is
also heated by the sun's rays.
(D Note
I f the en gine has been under heavy load for
an e xtended per io d of t ime, heat builds up in
the engine compartment after the engine is
sw itched off and there is a risk of damagi ng
the engine . For this reason, let the eng ine run
at idle fo r approximately two minu tes before
shut ting it off .
Messages
Engine running. Warning! Turn off ignition be­
fore leaving car
This message appea rs and a warn ing tone sounds
i f you open t he d river's doo r when the engi ne is
ru nning.
Please press brake pedal
This message appea rs if you do not press the
brake pedal when starting the eng ine.
D riving
Ill Remote control key: key not recognized. Is
the key still in the vehicle?
T h is ind icator l igh t tu rns on and this message ap­
pears if the ignition key was remove d from the
vehicle when the engi ne was running . If the ig ni­
tion key is no lo nger in the vehicle, you cannot
switch on the ignition or start the engine once
you stop it . You also cannot lock the ve hicle from
the outside .
Shift to P, otherwise vehicle can roll away.
Doors can be locked in P only
T h is mess age appears for safety re asons if the
selector lever is in the N pos it ion when yo u
switch the ignition off. Move the se lector lever to
t h e P position . Othe rw ise the vehicle is not pro­
tected from roll ing and it cannot be locked.
II Remote control key: hold back of key
against the de signated area. See owner' s man­
ual
If t he indica to r ligh t turns on and this message
appea rs, there is a malfunction ~
page 78.
Shift to P before leaving car, otherwise vehicle
can roll away
Th is message appears if the drive r's door is
opened wh ile the ign ition is switched on an d the
t ran sm issio n has not been s hifte d to t he
P posi­
t ion. Shift t he tr ansmission in to the
P p o sition
and t urn o ff the igni tion if you are leaving the ve­
hicle . Otherwise the vehicle could roll. A lso refe r
to
~ page 80.
77

label is located on the driver's side B-pillar. In­
f late trai ler tires to trailer and tire manufactur­
ers' specifications.
Lights
The headlight settings should be checked with
the trailer attached before driving off. Check to
make sure both vehicle and trailer lights are
working properly.
Safety chains
Be sure trailer safety chains are properly connect­
ed from the tra iler to the hitch on the vehicle.
L eave enough slack in the chains to permit turn­
ing corners. When you install safety chains, make
sure they wi ll not drag on the road when you are
driving.
The chains shou ld cross under the trailer tongue
to prevent it from dropping in case of separation
from the hitch.
Driver messages
Driving with a trailer requires extra caution .
Weight distribution
Towing a loaded trailer w ith an empty car results
in a high ly unstable dist ribution of weight . If this
cannot be avo ided, drive at very low speeds only
to avoid the risk of losing steering control.
A "balanced" rig is easier to operate and cont rol.
This means that the tow vehicle should be loaded
to the extent possible and permissible, while
keeping th e trailer as light as possib le under the
circumstances . Whenever possib le, transfer
some cargo to the luggage compartment of the
tow vehicle whi le observing tong ue load require­
ments and vehicle loading considerations.
Speed
The higher the speed, the more difficult it be­
comes for the driver to contro l the rig. Do not
drive at the maximum permissible speed. Reduce
your speed even more if load, weather or wind
<( conditions are unfavorable -particularly when a,
;::; going downhill. ,....
N .... 0 0
3 a,
Trailer towing
Reduce vehicle speed immediately if the trailer
shows the slightest sign of swaying.
Do not try
to stop the swaying by accelerating.
Observe speed limits. In some areas, speeds for
vehicles towing trailers are lower than for regular
vehicles .
Always apply brakes early. When driving down­
hill, shift into a lower gear to use the eng ine
braking effect to slow the vehicle . Use of the
brakes alone can cause them to overheat and fail.
Coolant temperature
T he coolant temperature gauge~ page 11 must
be obse rved carefully. The coolant temperature
can increase if you drive on long inclines in a low
gear at high engine speeds . Reduce your speed
immediately if the LEDs in the top part of the dis­
play turn on.
For more information about indicator lights, re­
fer to.
~ page 31 .
A WARNING
= -
Anyone not properly restrained in a moving
vehicle is at a much greater risk in an acci­
dent. Never let anyone ride in your car who is
not properly wearing the restraints provided
by Aud i.
Trailer towing
information
Important to know
Your vehicle handles differently when towing a
trailer because of the addit ional weight and dif­
ferent weight distribution . Safety, performance
and economy will greatly depend on how careful­
ly you load your trailer and operate you r rig.
Before you actually tow your trailer, pract ice
turning, stopping and backing up in an area away
from traffic . Keep pract ic ing until you have be­
come complete ly familiar w ith the way your vehi­
cle-trailer combination behaves and responds.
91

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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

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 ..,