2018 AUDI A3 SEDAN brake light

Checking and Filling
-Do not a pply u nder body protectant in t he
exhaust system area, because this increases
the risk of fire.
On Board Diagnostic
System (OBD)
The On-Board Diagnostic System monitors the
engine and transmission componen ts that influ ­
ence emissions.
F ig . 2 64 Footwell o n left s ide o f th e veh icle : co nn ect io n
port fo r the O n-Boa rd D iagno stic Syste m (OBD)
On-Board Diagnostic System
Engine data can be read out at the On-Board D i­
agnostic System connec tion po rt usi ng a special
tes ting device
~ fig . 264.
Indicator light
If thP ¢.j indicato r light bli nks or tu rns o n, there
is a malfunction that is causi ng poor emissions
qua lity and tha t could damage the ca talytic con­
ve rte r.
Drive s lowly to an author ized A udi dealer or au ­
thor ized Audi Se rvice Facility to have the ma l­
function co rrected .
The indicator light can also tur n on if t he fuel fill­
er cap is not closed
correct ly ~ page 315.
A WARNING
Incorrect use of the connection port fo r the
O n- Board Diag nostic System can ca use mal­
functions, which can then result in ac ciden ts
and ser ious injuries.
-Only allow a n author ized Audi dealer or au­
t h o riz e d Aud i Ser vice Faci lity to re ad o ut the
engi ne dat a.
318
-
Engine compartment
Working in the engine compartment
Special care is required if you are working in the
engine compartment
For work in the engine compartment, such as
checking and fill ing fluids, there is a risk of in­
jury, scalding, accidents , and burns . For thi s
reason, follow all the w arnings and general
safety p re caut ion s prov ided in the following in­
formation. The engine compartment is a dan­
gerous are a.
~ .&,.
A WARNING
To reduce the ris k of injur ies, comp lete the
follo wing steps before opening t he hood:
- Tur n t he engine off.
- Switch the igni tio n off.
- Set the park ing brake.
-Move the selector lever into the P position.
-N ever open the hood when there is steam o r
coo lant escaping from t he engine compart­
ment, because there is a risk that yo u could
be burned . Wait unt il no steam or coolant is
escapi ng.
- L et the eng ine cool down .
-Keep children away from the eng ine com-
pa rtment .
-Never sp ill fluids on a hot engine . These flu­
ids (such as the anti-freezing agent con­
tained i n the coolant) ca n ignite .
- Avoid short c ircuits in the electrical system .
-When working in the engine compa rtment,
remember that the radiator fan can switch
on even if the ignition is switched off, wh ich
increases the r isk of persona l injury .
-Never open the cap on the coolant expan­
sion tan k when t he engine is warm . The
coo ling system is under p ressure.
-To protect your face, hands , and a rms from
hot steam or coolant , cover the cap wit h a
large cloth when op ening .
-Do not remove the engine cover under any
circumstances. This increases the r isk of
burns .

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Apply the product using a mic rofiber cloth. To
avoid damaging the paint surface, do not use too
much pressure .
R inse the veh icle t horo u ghly wi th wa ter. Then
clean using a neutra l shampoo and a soft micro ­
fiber cloth.
R inse the veh icle t horo u ghly again and let it a ir
d ry . Remove any water res idue using a ch amois.
A WARNING
-Only wash the vehicle when the ignition is
off and follow the instructions from the car
wash operator to reduce the risk of acci­ dents.
-T o reduce the risk of cuts, protect yourself
from sharp metal components when wash­ ing the underbody or the inside of the wheel
hous ings .
-After wash ing the vehicle, the brak ing effect
may be de layed due to mo isture on the
brake rotors or ice in the w inter . This in­
c reases the risk of an acc ident. The brakes
must be d ried fi rst w it h a few careful b rake
app lications.
@ Note
-If you wash t he veh icle in an automatic car
wash, you m ust fold the exterior m irrors in
-
Care and cleaning
to reduce the r isk o f damage to the m irro rs .
Power fo lding exterior mirrors* m ust only
be folded in and o ut using the power fold ing
function.
-T o red uce the risk of paint damage, do not
was h the vehicle in direct s unlight.
-T o red uce the risk of damage, do not was h
the power top * w ith a pressu re washe r.
-T o red uce the risk of damage to the s urface,
do not use insect removing sponges, kitche n
sponges or s imilar items.
-Matte finish painted vehicle components:
-To reduce t he risk of damage to t he sur-
face, do not use pol ish ing agents or hard
wax.
-Neve r use protective wax. It can destroy
the matte finish effect .
-Do not place any st ickers or magnetic
s igns on vehicle parts painted with matte
finish paint. The paint cou ld be damaged
when the stickers or magnets a re re ­
moved.
@ For the sake of the environment
Only wash the veh icle in facilities spec ia lly de­
s igned for that pu rpose. This will reduce the
r isk of di rty wate r contam ina ted with o il from
en te ring the sewe r sys tem.
Cleaning and care information
When clea ning and caring for individua l vehicle
components, refer to the follow ing tables . The
in fo rmat ion conta ined there is s imp ly recom­
mendations . Fo r qu est io ns or for components t
h at are not listed, consult an authorized Aud i
dealer or authorized Audi Service Fac il ity. Also
fo llow the information found
in c:> ,& .
Exterior cleaning
Component Situation
Solution
Wind shield wip er
Deposits soft cloth wi th glass cleane r, ~ page 56
blade s
Headlights /
Deposits Soft sponge with a mild soap solutiona)
Tail light s
Sensors /
Deposits Sensors: soft cloth wit
h solvent -free cleaning solution
camera lenses Camera lenses: soft cloth with a lcohol-free cleaning so lu-
tion
Snow/ice Hand br ush/solven t-free de-icing spray
355

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-Do not raise the v ehicl e until you are sure
the jack is securely engaged .
- Passengers must not rema in in the vehicle
when it is jacked up.
- Make sure that passengers wait in a safe
p lace away from the vehicle and well away
from the road and traff ic.
- Make sure jack position is correct, adjust
as necessary and then cont inue to raise
the jack.
CD Note
Do not li ft the vehicle by the sill. Position the
vehicle jack on ly at the designated lifting
points on the sil l. Otherwise, your vehicle will
be damaged.
Taking the wheel off/installing the spare
Follow th ese instructions st ep-by-step for chang­
ing the wheel .
Fig . 2 90 Ch angin g a w hee l: u sin g th e screwdr ive r ha ndle
(with t he bla de remo ved} t o turn t he bolts
F ig. 291 C h anging a w hee l: ali gnm en t pi n in side the to p
h ol e
1l Appli es to veh icles with ceram ic br ake rot ors•: Use a sec ­
on d alig nme nt pin * (sto re d in t he s pare w hee l we ll mo ld­
ing} for the lo w er hole , fo ll o w ing the de scr ip tion for t he
firs t alig nmen t pin .
Em ergen cy as sis tanc e
After you have loosened all whe el bo lts and
raised the vehicle off the gro und, remove and re­
place the wheel as follows:
Removing the wheel
.,. Use the hexagonal socket in the screwdriver
handle
t o comp letely remove the topmost
wheel bo lt and set i t aside on a
clean su rface
r=> fig. 290.
.,. Screw the threaded end of the alignment pin
from the too l kit hand-tight into the empty bo lt
hole
c> fig . 2911>.
.,. Then remove the other wheel bolts as descr ibed
above .
.,. Take off the whee l leaving the alignment p in in
the bolt hole
~ 0-
Putting on the comp act spare wheel
.,. Lift the spare wheel and carefully slide it over
the alignment p in to guide it in
place r=>@.
.,. Use the hexagonal socket in the screwdr iver
ha ndle to screw in and t igh ten all wheel bolts
slightly .
.,. Remove the alignmen t pin and insert and t igh t­
en the remaining wheel bo lt s light ly like the
rest .
.,. Tu rn the jack hand le counter-clockwise to lowe r
the vehicle until the jack is fully released .
.,. Use the wheel bolt wrench to tighten a ll wheel
bolts firmly
c> page 365 . Tighten them cross­
wise,
from one bo lt to the (approx imately) op ­
posite one , to keep the wheel centered .
CD Note
When removing or installing the wheel , the
r im could h it the brake rotor and damage the
r otor. Work carefully and have a second per­
son help you.
@ Tips
Never use the hexagonal socket in the handle
of the sc rewdrive r to loosen or t ighten the
whee l bolts.
367

Fuses and bulbs
Fuse ass ignment - interior
ij
::, CX) ID
F ig. 298 Vehicle interior: fuse assignment
No. Equipment
Fl Ad Blue engine components
F2 Seat adjustment
F3 Power top hydraulic pump
F4 Infotainment control panel,
Infotainment
components
FS Gateway
F6 Selector lever (automat ic transm iss ion)
Air conditioning/heating controls, auxiliary
F7 heating, rear window defogger relay, tire pressure monitor
Electromechan ical park ing brake switch,
light switch, rain/light sensor, anti-theft
F8 alarm system,
diagnostic connector, roof
module, emergency call system, head light
range control
F9 Steering col umn sw itch module
FlO Infotainment system display
Fll Left vehicle electrica
l system control mod-
ule
F12 Infotainment components
F13 Driver's side safety belt tensioner
F 14 Heat ing/a ir condit ion ing system blower
372
No . Equipment
FlS Electronic
steering column lock
F16 Infotainment components
Fl7 Instrument cluster
Fl8 Rearview camera
Fl9 Convenience access control module
F20 Engine components
F21 Steering column, steering wheel heating
switch module
F23 Panorama glass
roof/power top control
module, power top latch
F24 R
ight vehicle electrical system control
module
F2S Driver
's side front/rear power windows
F26 Seat heating
F27 Interior
lights
F28 Power top control module
F29 Interior lights
F30 Diagnostic connector
F32 Front camera, parking
system, ACC sensor,
lane change assist
F33 Airbag
Hold assist button, interior sound, revers-
F34 i
ng light sw itch, temperature sensor, neck
heating relay coil and socket relay, power
top operation button
Air quality sensor, automatic dimming
F3S rearview
mirror, diagnostic connector, cen-
ter console power supply
F36 Right
headlight (LED, Matrix LED)
F37 Left headlight (LED, Matrix LED)
F38 High-voltage battery
F39 Passenger
's side front/rear power w in-
dows
F40 Sockets
F41 Passenger's sid e safe ty be lt tens ioner
F42 Central locking area
F43 Sound-amplifier
F44 All wheel drive
F47 Rear window wiper
F48 Outer sound actuator

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No. Equipment
F49 Clutch sensor (relay 1+2),
high-voltage
battery, power electronics
F52 Control module for suspension control
F53 Rear window defogger
The power seats* are protected via
circuit break­
ers
that automatically switch on after a few sec­
onds after the overload has been reduced.
Fuse assignment -engine compartment
Fig. 299 Engine compartme nt: fuse assignment
No. Equipment
Fl Electronic Stabilization Control (ESC)
F2 Electronic Stabilization Control (ESC)
F3 Engine control module
Eng ine components, engine cooling, aux-
F4 iliary heater co il relay (1+4+7), secondary
air inject ion pump relay
FS Engine components, fue
l tank system
(diesel), CNG cut-off va lve
F6 Brake light switch
F7 Eng
ine components, water pumps, tank
system (gasoline engine)
FB Heat oxygen sensor
Fuses and bulbs
No. Equipment
F9 Engine
components, exhaust door, glow
time control module (relay 6)
F lO Fuel control module, fuel pump
F ll Auxiliary
heater heating element 2, en-
gine components, secondary air pump
F12 Auxiliary
heater heating element 3, vac-
uum pump
F13 Automat ic transmission
F lS Horn
F16 Ign
it ion coil (relay 8), power and control
electronics
F17 E
lectroni c Stabilization Control (ESC), en-
gine control module (relay S)
F18 Terminal
30 (voltage reference), battery
monitoring
Fl9 Windshield wipers
F20 Anti-theft alarm system
F22 Terminal
SO diagnos is, engine control
module
F23 Starter
F24 Auxiliary
heater heating element 1, brake
booster
F 31 Vacuum pump, water pump, high pres-
sure pump, fuel injectors
F33 Brake
pressure reservoir, recuperation,
transmission fluid pump
F34 Brake booster
F 35 A/C function
relay
F37 Parking heater
Bulbs
Replacing light bulbs
For your safety, we recommend that you have
your authorized Audi dealer replace any bulbs for
you.
It is becom ing increasingly more and more diffi­
cu lt to replace vehicle light bulbs since in many
cases, other parts of the car must first be re­
moved before you are ab le to get to the bulb.
This applies especially to the light bulbs in the
373

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defroster on to reduce any voltage peaks that may occur when disconnecting the jumper
cables. The headlights must be switched
off.
14. While the engines are running , remove the
cables in
reverse order from the way they
were installed, as described in ¢
page 3 76.
Make sure the cables do not get caught in
moving engine components .
15. Fold the cover back on the battery correct ly .
16. Sw itch the heater fan and rear w indow de­
froster
off.
Read and fo llow: ¢.&. in Preparation on
page 375
and ¢ (j) in Preparation on page 375.
(D Note
Do not use the negat ive termina l on the veh i­
cle battery for jump star ting. A malfunction
could occ ur in the vehicle electrical system.
@ Tips
- Make sure that the connected positive ter­
mina l clamps have sufficient contact with
metal.
- The vehicle battery in your vehicle vents to the outs ide so the battery gases d rain out of
the veh icle.
RS model s: starting the engine
Both jump start cables must be connected in the
correct order!
F ig . 301 Engine co mpartment : connector s for a c ha rge r
and jump star t cables
Em erge ncy s itua tions
Fig. 302 Jump star ting using a ve hicle bat tery in anothe r
ve hicl e:@ -drained, @- prov id in g curren t
M
lri 0 > (X) m
Jump sta rt p oin ts are located on the left side of
the engine compartment instead of the vehicle
battery ¢
fig. 301. Open the cap on the positive
terminal. The procedure for connecting jump start cables that is described next is designed to
help jump start your vehicle .
Follow the information about the vehicle battery
¢ page 326.
Pr eparation s
1. Read the follow ing carefully ¢ page 375,
Preparation .
2. Set the parking brake and place the selector
lever in the P position.
3. Turn the ign ition and electrical equipment
off i n both vehicles .
Conn ecting /d is conn ect ing the jum p sta rt
cable
4. Open the cover on the posit ive terminal.
5. Clamp the end of the red jump start cable to the
termina l(!) ¢ page 3 76, fig. 300 on the
drained vehicle
battery @c:;>(Q) in Prepara­
tion on page 375.
6. Clamp the other end of the red jump sta rt ca ­
ble to the positive terminal @on the veh icle
battery providing the current @.
7. Clamp the black end of the jump start cab le
prefer ably at the grou nd point , or on the
negative terminal of the vehicle battery @
on the vehicle providing the current @.
8 . Clamp the other end of the black jump start
cable
only to the gr ound point @ on you r
v e hicl e@ .
.,..
377

Emergency situations
9. Route the jump sta rt cables so they cannot
get caught in the moving parts in the engine
compartment.
Starting the engine
10. First start the engine in the vehicle g iving the
charge and let it run at idle.
11. Now start the engine in the vehicle with the
drained vehicle battery and wait two to three
minutes until it "runs smoothly" .
12.
If the engine does not start, stop the starting
procedure after 10 seconds and then repeat
it after approximately 30 seconds .
13 . In the vehicle that is being jump started,
switch the heater fan and rear w indow de­
froster on to reduce any voltage peaks that may occur when disconnecting the jumper
cab les. The headlights must be switched
off.
14. While the engines a re running, remove the
cables in
reverse order from the way they
were installed, as described in ¢
page 3 76.
Make sure the cables do not get caught in
moving engine components.
15 . Close the cap on the positive term inal.
16 . Sw itch the heater fan and rear w indow de­
froster
off.
Read and follow: ¢ .&. in Preparation on
page 375
and ¢ (D in Preparation on page 375 .
@ Tips
-Make sure that the connected positive ter­
minal clamps have sufficient contact with
metal.
- The vehicle battery in your vehicle vents to
the outs ide so the battery gases drain out of
the veh icle .
Towing with a tow truck
General hint s
Your Audi requires special handling for towing.
The follow ing information is to be used by com­
mercial tow truck operators who know how to op­
erate the ir equipment safely.
-Never tow your Audi. Towing will cause dam­
age to the engine and transmission .
378
-Never wrap the safety chains or winch cables
around the brake lines .
- To prevent unnecessary damage , your Audi
must be transported with a flatbed truck.
- To load the vehicle on to the flatbed, use the
towing loop found in the vehicle tools and at­
tach to the front or rear anchorage
¢page 378 and ¢page 379.
A WARNING
A vehicle being towed is not safe for passen­
gers . Never allow anyone to ride in a vehicle
being towed, for any reason.
Front towing loop
Fig. 303 Rig ht s ide o f front b umper: install ing the tow ing
loop
The threaded opening for the towing loop is lo­
cated behind a
cover on the right side of the front
bumper .
.,,. Remove the towing loop from the vehicle tool
kit ¢
page 360 .
.,,. Press inward on the upper le~ area of the cap
with brief, strong pressure to remove it from
the bumper
¢fig. 303 .
.,,. Insert the towing loop in the threaded opening
until it stops, and then tighten it with the
wheel wrench .
.,,. After using, place the towing loop back in the
vehicle tool kit .
A WARNING
If the towing loop is not tightened until it
stops when installing, the threads may be pulled out when towing the vehicle and that
could cause an accident .
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@ For the sake of the environment
-Changing the engine settings wi ll adversely
affect emission leve ls. Th is is detrimental to
the env ironment and increases fuel con ­
sumption.
- A lways observe environmenta l regu lations
when disposing of old engine o il, used brake
flu id, d irty engine coolant, spent batteries
or worn out tires.
- Undeployed airbag modules and pretension­
ers might be classified as Perchlorate Mate­
rial -spec ial handl ing may apply, see
www .dtsc.ca .gov/hazardouswaste/perch lo­
r ate. When the vehicle or pa rts of t he re­
stra int system includi ng a irbag mod ules
s af ety be lts with pretens ioners a re scrap ­
ped, a ll applicab le laws and regulations
must be observed. Your a uthorized Audi
dealer is fam iliar with these requirements
and we recommend that you have your dea l­
er perform this service for you.
Accessories and
technical changes
Additional accessories and parts
replacement
Always consult on authorized Audi dealer before
purchasing accessories.
Audi ve hicles that are constructed with advanced
materials like Steel/Aluminum (Hybrid construc­
tion), Aluminum (Aud i Space Frame), and/or Alu­
minum/Carbon Fiber (Ultra Advanced Light
We ight Materials) are as unique as the ir dr ivers .
Therefo re, the ava ilability of certain parts needed
for repa ir , restorat ion, or reconstruction w ill be
rest ricted , or pa rts will be unava ilable, if the ve ­
hicl e is not repa ired at an a uthorized Aud i co lli­
sion repair facility . This includes but is not limi t­
ed to structura l parts which require specia lized
training and equipment to restore their crash ­
worthiness back to the original NHTSA and IIHS performance.
Your vehicle incorporates the latest safety design
features ensuring a high standard of active and passive safety.
Con sum er In form ation
This safety could be compromised by non -ap ­
proved changes to the vehicle. For t his reason, if
parts have to be rep laced, p lease observe the fol ­
lowing points when install ing additional accesso­
ries:
Approved Audi accessories and genuine Audi parts are avai lab le from authorized Aud i dea lers.
T hese dea le rs a lso have t he necessa ry fa cilit ies,
tools and trained specialists to install the pa rts
and accessories proper ly .
A WARNING
--
Using the wrong spare parts or using non -ap­
proved accessories can cause damage to the
vehicle and serious personal injury.
- Use on ly accessories expressly approved by
Aud i and genuine Audi spare parts
- These parts and accessor ies have been spe­
cially designed to be used on your vehicle.
- Do not use license p late brac kets in the
front area that are d ifferent from the one
installed at the factory, or add additional
li­
cense plate brackets.
- Never install accessor ies such as telephone
cradles or beverage holders on airbag covers
or w ith in the airbag deployment zones. Do­
ing so will increase the risk of injury if a ir­
bags a re tr iggered in an accident!
- Before you check anyth ing in the eng ine
compa rtment, always read and heed all
WARN INGS
~page 318.
@ Note
- If items other than genu ine Audi spare
parts, add-on equipment and accessory
items are used or if repa ir work is not per­
form ed according to specified methods, th is
c an result in seve re damage to you r vehi­
cle's eng ine and body (s uch as cor rosion)
and adve rsely affec t your ve hicle's warranty.
- If emergency repa irs m ust be pe rformed
elsew here, have the vehicle ex am ined by an
authorized A udi dealer as soon as possib le .
- Th e manufac ture r ca nnot be he ld liable fo r
damage wh ic h occur s d ue to fail ure to com ­
ply with these stipulations.
385