2018 AUDI A4 instrument panel

collision. It is not possible to define an airbag
triggering range that will cover every possible
an­
g le of impact, s ince the circumstances will vary
considerably between one collision and another.
Important factors include, for example, the
na­
ture (hard or soft) of the impacting object, the
angle of impact, vehicle speed, etc.
¢ page 293,
How side curtain airbags work .
Aside from their normal safety function, safety
be lts work to he lp keep the driver or front pas­
senger in pos it ion in the event of a collision so
that the side curtain airbags can p rovide protec­
tion .
The airbag system is not a substitute for your
safety belt . Rather, it is part of the overall occu­
pant restraint system in your veh icle . Always
re­
member that the airbag system can only help to
p rotect you if you are wearing your safety bel t
and wearing it properly . This is another reason
why you should always wear your safety belts, not just because the law requires you to do so
¢ page 263, General information.
It is important to remember that whi le the s ide
curtain airbag system is designed to he lp reduce
the likelihood of serious injuries, other injuries,
for example, swelling, bruising, friction burns and minor abrasions can also be associated with
these airbags upon deployment . Remember too,
these airbags will deploy only o nce and only in
certa in ki nds of acc idents -your safety belts are
always there to offer protection .
The side curtain airba g sy stem ba sically
consists of:
- The electronic control module and external s ide
impact senso rs
- The side curtain airbags above the w indows of
the outer seating positions with ejection miti­
gation feat ures
- The airbag indicator light in the instrument
panel
The airbag system is monitored electronically to make certain it is funct ion ing properly at all
times . Each time you turn on the ignit ion, the air­
bag system ind icator light will come on for a few
seconds (self d iagnost ics) .
Airb ag sys tem
The side curta in airbag is not activ ated:
- if the ignition is turned off
- in side co llisions whe n the acceleration meas-
ured by the sensor is too low
- in rear-end col lisions .
_&. WARNING
-Safe ty bel ts and the airbag system will only
provide pro tect ion when occupants are in
the proper seating position
¢ page 65,
Front seats.
- I f the airbag ind ic a tor light q page 3 2
comes when the veh icle is being used, have
the system inspected immediately by your
authorized Audi dealer. It is possib le that
the airbag will inflate when it is not sup­
posed to, or w ill not inf late when it should.
How side curtain airbags work
Side curtain airbags con work together with side
airbags to help reduce the risk of head and upper torso injuries for occupants who are properly re­
strained .
Fig. 24 7 Illustration of pr incip le: Inflated s ide curta in air­
bags o n the left s ide
The side curtain airbags inflate between the oc­
cupant and the w indows in a side collis ion
c> fig . 247 .
When the system is triggered, the side curtain
airbag is filled with propellant gas and breaks
through a seam above the front and rear side
windows identified by the AIRBAG label. In order
to help provide this additional protect ion, the
s ide curtain a irbag must inf late w ithi n the blink
of a n eye at very high speed and with g reat fo rce .
T he side c urtain airbag could injure you if yo ur
Ill>
293

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3 co
on all the time whenever the ignition is
switched on.
- If the
PASSENGER AIR BAG OFF ~. light
does not come on and stay on, immediate­
ly install the forward-facing child seat in a
rear seating position and have the airbag
system inspected by your authorized Aud i
dealer.
- Always buckle the child seat firmly in
p lace even if a ch ild is not sitt ing in it. A
loose child seat can fly around during a
sudden stop o r in a collision.
-Always read and heed all WARNINGS whenever using a child restraint in a vehi­
cle ~ page 263, Safety belts, ~ page 2 71,
Airbag system
and ~ page 295, Impor­
tant information .
@ Tips
Always replace ch ild restraints that were in­
stalled in a vehicle dur ing a crash. Damage to
a child restraint that is not visib le co uld cause
it to fail in anothe r collision situation .
Advanced front airbag system and children
Your vehicle is equipped with an "Advanced Air­
bag System" in compliance with United States
Federal Motor Vehicle Safety Standard (FMVSS)
208, as well as Canada Motor Vehicle Safety
Standard (CMVSS) 208 as applicable at the time
your veh icle was manufactured.
The Advanced Airbag system in your vehicle has
been certified to meet the "low-risk" require­
ments for
3-and 6-year old children on the pas­
senger side and small adults on the driver side.
The low risk deployment crite ria are intended to
reduce the risk of injury through inte raction with
the airbag that can occur, for examp le, by being
too close to the steering whee l and instrument
panel when the airbag inflates . In addition, the
system has been certified to comply with the
"suppression" req uirements of the Safety Stand­
ard, to turn off the front airbag for infants up to
12 months who are restra ined on the front pas­
senger seat in child restraints that are listed in
the Standard .
Child safety
Even though your vehicle is equipped with an Ad­
vanced Airbag system, all chi ldren, especially
those 12 years and younger, should always ride in the back seat properly restrained for their age
and size. The airbag on the passenger side makes
the front seat a potentia lly dangerous place for a
child to ride . The front seat is not the safest place
for a ch ild in a forward-fac ing ch ild safety seat .
It
can be a very dangerous place fo r an infant o r a
la rger ch ild i n a rea rwa rd-facing seat .
T he veh icle 's Advanced Airbag System has a ca­
pacit ive passenger detection system in the front
passenge r seat cushion that can detect the p res­
ence of a baby or a ch ild in a child restra int sys­
tem on this seat .
The capacitive passenger detection system reg is­
te rs the changes that result in an electrical field
when a child, a ch ild restraint, and a baby b lan ket
are on the front passenger seat. The change in
the measured capacitance due to the presence of
a chi ld, a child restraint, and a baby blanket on
the front passenger seat is related to the child
restra int system resting on the seat. The meas­
ured capacitance of a child restraint system var­
ies depend ing on the type of system and specific
make and model.
The electrical capac itance of the various types,
makes, and models of child restraints specif ied
by the U .S.National Highway Traff ic Safety Ad ­
min istrat ion (NHTSA) in the relevant safety
standard are stored in the Advanced Airbag Sys­
tem contro l unit together with the capacitances
typ ica l of infants and a 1-year old child. When a
child restraint is used on the front passenger
seat with a typical 1 year-old infant, the Ad­
vanced Airbag System compares the capacitance
measured by the capacitive passenger detection
system with the data stored in the electronic con­
trol unit .
Child restraints and Advanced Airbags
Regardless of the ch ild restraint that you use,
make sure that it has been certified to meet Safe­
ty Standards and has been ce rt ified by its manu­
fact urer for use w ith an airbag . Always be su re
that the child restraint is properly installed at
llo-
297

an 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. 262 Luggage co mpartment: opening the side trim
panel
Fig . 263 Luggage compartment: fuel filler door e merge ncy
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. 262.
... Loosen the loop c;, fig. 263 from the retainer
and then pull on the loop carefully
¢(D . The
filler door is released .
... Press on the left side of the fuel filler door to
open it
¢ page 317, fig. 260.
(D Note
Only pull on the loop until you feel resistance.
You will not hear it release . Otherwise you
could damage the emergency release mecha­
nism.
Checking and Filling
Selective catalytic
reduction (AdBlue/DEF)
General information
Applies to: vehicles with selec tive catalytic reduction
In vehicles with selective catalytic reduction, a
urea solution (AdBlue/DEF) is injected into the
exhaust system in front of a nitrogen oxide cata­
lytic converter to reduce nitrogen emissions. The
urea solution is known as Ad Blue or DEF (Diesel
Exhaust Fluid). The information that follows w ill
use the name AdBlue.
The Ad Blue is carried in a separate tank in the ve­
hicle. The AdBlue usage accounts for approxi­
mately 1.0% to 4 .0% of the diesel fuel that is
used .
When a message about refilling the AdBlue ap­
pears in the instrument cluster display, you must
refill the AdBlue yourself or have it refilled by an
authorized Audi dealer or authorized Audi Service
Facility
c;, page 320 .
{D Tips
-The display indicates the distance remaining
that can be dr iven
c;, page 319. 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 this ve­
hicle.
Messages in the instrument cluster display
Appl ies to: vehicles wi th selective catalytic reduction
The display indicates if the Ad Blue level is low or
if there is a system malfunction.
AdBlue level low
You will be informed in the instrument cluster
display if the AdBlue in the tank drops below a
certain level. Add at a minimum the amount of
AdBlue shown in the message:
II Refill with at least x qt (l) Ad Blue. Range
x mi (km )
319

Checking and Filling
_& WARNING
California Proposition 65 Warning:
- Engine exhaust, some of its constituents ,
and certain vehicle components contain or emit chemicals known to the State of Cali­
fornia to cause cancer and birth defects and reproductive harm. In addition, certain flu ­
ids contained in vehicles and certain prod­
ucts of component wear contain or emit
chemicals known to the State of California
to cause cancer and birth defects or other reproductive harm.
- Battery posts, terminals and related acces­
sories contain lead and lead compounds, chemicals known to the State of California
to cause cancer and reproductive harms.
Wash hands after handling.
(D Note
When filling fluids, be sure not to mix the flu­ ids up . Otherwise severe malfunctions and
en­
gine damage will occur.
@ For the sake of the environment
You should regularly check the ground under
your vehicle in order to detect leaks quickly . If
there are visible spots from oil or other fluids,
bring your vehicle to an authorized Audi deal­
er or authorized Audi Service Facility to be
checked.
Opening and closing the hood
The hood is released from ins ide the vehicle.
Fig. 266 Drive r footwell : rele ase le v er
324
Fig. 267 Unlocked hood: lev er
Make sure the wiper arms are not raised up from
the windshield. Otherwise the paint could be
damaged .
Opening the hood
"'With the driver's door open, pull the lever be­
low the instrument panel in the direction of the
arrow
9 fig . 266 .
"' Raise the hood slightly 9 ,&.
"'Press the lever ~ fig. 267 in the direction of the
arrow. This releases the hooks.
"' Open the hood.
Closing the hood
"' Push the hood down until you override the
force of the struts .
"'Let the hood fall lightly into the latch . Do not
press it in.
9 ,& .
_& WARNING
-Never open the hood when there is steam or
coolant escaping from the engine compart­
ment, because there is a risk that you could
be burned. Wai t until no steam or coolan t is
escaping.
- For safety reasons, the hood must always be
closed securely while driving . 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 .
- If you notice that the hood is not latched
while you are driving, stop immediately and
close it, because driving when the hood is
not latched increases the risk of an accident.
,...

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Fuse panel @ (brown)
No . Equipment
2
Mass airflow sensor, camshaft adjust-
ment, charge air cooler pump
3 Exhaust doors, fuel injectors, radiator inlet
4 Vacuum pump, hot water pump, particu-
late sensor, biodiesel sensor
5 Brake light sensor
6 Engine va lves, camshaft adjustment
7
Heated oxygen sensor, mass airflow sen-
sor
8
Water pump, high pressure pump, high
pressure regulator va lve
9 Hot water pump
10
Oil pressure sensor, oil temperature sen-
sor
11 Clutch pedal position sensor
12 Engine valves
13 Radiator fan
14 Fuel injectors
15 Ignition coils
16 Fuel pump
Fuse panel @ (red)
No . Equipment
1 Anti-theft alarm system
2 Eng ine control module
3 Lumbar support
Automatic transmission selector mecha -
4
nism
5 Horn
6 Electromechanical park ing brake
7 Gateway control module
8 Interior headliner lights
10 Airbag control module
11 Electronic Stabilization Control (ESC)
12 Diagnostic connector, light/rain sensor
13 Climate control system
14 Right front door control module
15 A/C compressor
Fuses and bulbs
Fuse panel © (black)
No . Equipment
1 Front seat heating
2 Windshield wipers
3 Left head light electronics
4
Panorama glass roof I sliding/t ilting sun-
roof
5 L eft front door control module
6 Sockets
7 Right rear door control module
8 All wheel drive
9 Right headlight electronics
10
Windshield washer system/headlight
washer system
11 Left rear door control module
Fuse panel @ (black)
No. Equipment
Seat ventilation, rearv iew mirror, climate
1 control system, rear climate control sys-
tern controls, windshield defogger
2 Gateway, climate control system
3 Sound actuator/exhaust sound tuning
4 Clutch pedal posit ion sensor
5 Engine start
7 Rear USB charg ing port
8 Homelink
9 Adaptive cruise contro l
11 Video camera
12 Matrix LED headlight/right LED headlight
13 Matrix LED headlight/left LED headlight
14 Rear window wipe r
Fuse panel © (red)
No . Equipment
1 Ignition coils
5 En gine mount
6 Automat ic transmission
7 Instrument panel
8 Climate control system (blower)
10 Dynamic steering
11 Engine start
371

Fuses and bulbs
Fuse assignment - Driver's side of the
cockpit
Fig. 293 Driver sid e coc kp it : fuse pa nel w ith plastic bracket
Fuse panel
No. Equipment
2 Telephone
4 Head-up display
5 Audi mus ic interface, USB charging port
6 Front climate control system contro ls
7 Steering column lock
8 I nfotainment system display
9 Instrument cluster
10 Infotainment unit
11 Light switch
12 Steering column electronics
14 Infotainment system
16 Steering wheel heating
372
Fuse assignment - Left side of the luggage
compartment
Fig. 294 Left side of t he luggage compartme nt: fuse pane l
w ith plastic cl ip
Fuse panel @ (black)
No. Equipment
2 Windshield defroster
3 Windshield defroster
5 Suspension control
6 Automat ic transmission
7 Rear window defogger
8 Rear seat heating
9 Tail lights
10 Left safety belt tensioner
11 Central locking system
12 Electric luggage compartment lid
Fuse panel® (red)
No. Equipment
Not assigned
Fuse panel © (brown)
No. Equipment
2 Telephone
3 Lumbar support