warning light AUDI A4 2018 Owners Manual

Checking and Filling
Charging the vehicle battery
Fig. 272 Engine co mpa rtment : connec tors for a c harger
and jump start cab le s
Req uirement: only use chargers with a m aximum
c hargi ng vo lta ge of 30 amp s/14.8 Volt s.
The
vehicle battery cables remain connected .
.,. Read the warnings c> .&. in General warnings
about batteries on page 331
and c> ,&. .
.,. Switch off the ignition and all electrical equip ­
ment .
.,. Open the hood 9 page 324 .
.,. Open the red cover on the positive terminal
c>fig. 272 .
.,. Clamp the charger terminal clamps to the jump
s ta rt pin s
according to the instruct ions . (pin
under the red cover = "positive ", p in with hex­
agonal head= "negative ") .
.,. Inse rt the powe r cable for the charg ing device
i nto the socke t and switch the dev ice on .
.,. At the end of the charging process , switch the
charger off and pull the power cab le out of the
socket .
.,. Remove the charger terminal clamps.
.,. Close the red cover on the positive terminal.
.,. Close the hood c> page 324 .
A WARNING
-A highly explosive mixtu re of gases can form
when cha rging batter ies. On ly charge the
vehicle batte ry in well-ven tilated areas.
- A drai ned vehicle battery can freeze at tem­
peratu res a round 32
QF (0 QC). A froze n or
thawed veh icle bat tery must not be charged
and must not be used anymore. The ba ttery
housing can crac k and battery acid can leak
o ut if ice forms, wh ich increases the r isk of
an exp losion and chemical burns. Contact an
332
author ized Audi dealer or authorized A udi
Service Facility for more information.
- Do not connect or disconnect the charging
cable whi le charging because this increases
the risk of an explos ion.
@ Tips
- Only charge the vehicle battery t hrough the
connect ions in the engine compartme nt.
- Read all of the manufacturer's instructions
for the charger before charging the vehicle
battery.
Windshield washer system
Fi g. 2 7 3 Engine compar tm ent: washer flui d res ervoir cap
The windshield washer fluid reservoir¢ contains
t he cleaning solution for the windshield and th e
headlight washer system *
c> page 325, fig. 268 .
The reservoir capaci ty can be found in
c> page 381.
To reduce the risk of lime scale deposits on the
spray no zzles, use clean water with low amounts
of calcium . Always add w indow cleaner to the wa­
ter . When the outside temperatures are cold, an
anti -freezing agent should be added to the water
so that it does not freeze .
(D Note
-The concentration o f ant i-freez ing agent
must be adjusted to the ve hicle operat ing
conditions in the respective climate . A con­
cent ration t hat is too high can lead to vehi­
cl e damage.
- Never add radiator anti-freeze or other addi­
t ives to the washer fluid.

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q page 353. In some cases, you must drive for
several minutes after storing the pressures until
the indicator light turns off . If the indicator lig ht
does turn off or turns on aga in after a short peri­
od of time, drive to an authorized Audi dealer or
author ized Audi Service Facility immed iately to
have the ma lfunction corrected .
A WARNING
-If the t ire pressu re indica tor appea rs in the
display, red uce your speed immed iate ly and
avoid any har d st eer ing or braking maneu­
vers. Stop a s soon as possib le and check the
ti res and their press ure.
- T he driver is responsi ble for main taining the
cor rect ti re pressure. You must check the
tire pressure regu larly .
- Under certa in conditions (s uch as a sporty
driving style, winte r cond itio ns or unpaved
roads), the tire pressure monitoring system
indicator may be delayed.
(D Tips
- The t ire press ure monitoring sys tem can al ­
so stop work ing when there is an ESC mal ­
funct ion .
- Usin g snow chains may result in a system
malfunction.
- The t ire press ure moni toring sys tem in yo ur
A udi was ca librated with "A udi Orig inal
Tires"¢
page 341 . Using these ti res is rec­
ommended.
Storing tire pressures
If the tire pressure changes or a tire is replaced,
it must be confirmed in the Infotainment sys­ tem.
~ Make s ure before storing that the tire pressures
of a ll fo ur ti res meet the specified values and
are adapted to the load
¢ page 344.
~ Switch the ign ition on.
~ Select in the Infotainment system: I MENUI but­
ton
> Vehicle > Service & checks > Tire pre s­
s ure monitoring > Store tire pres sure > Yes ,
store now .
Wheel s
{!) Tips
Do not store the tire pressures if snow chains
are installed.
353

Care and cleaning
Care and cleaning
General information
Regular, proper care helps to maintain your vehi­
cle's value.
It can also be a requirement when
submitting warranty claims for corrosion damage
and paint defects on the body.
The required cleaning and care products can be
obtained from an authorized Audi dealer or au­
thorized Service Facility. Read and follow the in­
structions for use on the packaging .
A WARNING
-Using cleaning and care products incorrectly
can be dangerous to your health .
- Always store cleaning and care products out
of reach of children to reduce the risk of poi­
soning .
@ For the sake of the environment
- Preferably purchase environmentally-friend­
ly cleaning products.
- Do not dispose of leftover cleaning and care
products with household trash.
Car washes
The longer that deposits such as insects, bird
droppings, tree sap or road salt remain on the ve­ hicle, the more the surface can be damaged. High
temperatures such as those caused by sunlight
increase the damaging effect .
Before washing, rinse off heavy deposits with
plenty of water.
Stubborn deposits such as bird droppings or tree
sap are best removed with plenty of water and a microfiber cloth.
Also, wash the underside of your vehicle once road salt stops being used for the season .
Pressure washers
When washing your veh icle w ith a pressure wash ­
er, always follow the operating instructions pro­
vided with the pressure washer. This is especially
important in regard to the pressure and spraying
distance. Do not aim the spray directly at the
354
seals on the side windows, doors, lids or the sun­
roof* or at tires, rubber hoses, insulating materi­
al, sensors* or camera lenses* . Keep a distance of
at least 16 in (40 cm).
Do not remove snow and ice with a pressure
washer.
Never use cone nozzles or high pressure nozzles.
The water temperature must not be above 140 °F
(60 °().
Automatic car washes
Spray off the vehicle before washing.
Make sure that the windows and roof* are closed
and the windshield wipers are off . Follow instruc­
tions from the car wash operator, especially if
there are accessories attached to your vehicle.
If possible, use car washes that do not have
brushes.
Washing by hand
Clean the vehicle starting from the top and work­
ing down using a soft sponge or cleaning brush.
Use solvent-free cleaning products.
Washing vehicles with matte finish paint by
hand
To avoid damaging the paint when washing, first
remove dust and large particles from your vehi­
cle. Insects, grease spots and fingerprints are
best removed with a special cleaner for matte
finish paint .
Apply the product using a microfiber cloth. To
avoid damaging the paint surface, do not use too
much pressure.
Rinse the vehicle thoroughly with water. Then
clean using a neutral shampoo and a soft micro­
fiber cloth .
Rinse the vehicle thoroughly again and let it air
dry. Remove any water residue using a chamois .
A WARNING
-
- Only wash the vehicle when the ignition is
off and follow the instructions from the car

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Care and cleaning
Component Situation Solution
T ex til es
Deposits adhering to Vacuum cleaner
art ifici al leat her, the surface
A lcan tara Water-based deposits Absorbent
cloth and mild soap solutiona>
such as coffee, tea,
b lood, etc.
Oil -based deposits Apply a m ild soap solution
a), blot away the dissolved o il or
such as oil, make-up, dye, treat afterward with water, if necessary
etc.
Special deposits such
Special stain remover, blot with absorbent material, treat
as ink, nail polish, la- afterward with mild soap solution, if necessary
a)
tex paint, shoe pol-
ish, etc.
Natu ral le ath er Fresh stains Cotton cloth with a mild soap so lution a>
Water-based deposits Fresh stains: absorbent cloth
such as coffee, tea, Dried stains : stain
remover suitable fo r leather
b lood , etc.
Oi l-based deposits Fresh stains: absorbent cloth and stain
remover suitable
such as oil, make-up, for leather
etc. Dried stains : grease dissolving spray
Special deposits such Spot remove r suitab le for leather
as ink, nai l polish, la-
tex paint, shoe pol-
ish, etc.
Care Regularly apply condit ion ing c ream that protects from
lig ht and penet rates into the material. Use specia lly-co l-
ored conditioning cream, if necessary .
Carbon part s Deposits clean the same way as plast ic parts
a) Mi ld soap solution: maximum two tablespoons of neutral soap in 1 q uart (1 liter) of water
.8, WARNING
The windshield may not be trea ted with wa­
ter-repelling windshield coating agents. Un ­
favorable cond itions such as wetness, dark­
ness, or low sun can result in increased glare.
Wiper blade chatter is also possible.
@ Note
- Headlight s/tail li ght s
-Never clean headlights or tail lights with a
dry cloth or sponge.
- Do not use any cleaning product that con­
tains alcohol, because they could cause
cracks to form.
- Whe els
-
- Never use a ny pa int polish or other abra­
sive materials .
- Damage to the protect ive layer on the
rims such as sto ne ch ips or scratches must
be repaired immediately .
-Sen sor s/camera l enses
- Neve r use warm or hot water to remove
snow or ice from the camera lens . This
could cause the lens to crack .
- Neve r use ab rasive cleaning materials or
a lcohol to clean the camera lens . This
could cause scratches and cracks .
-Door window s
-Remove snow and ice on windows and ex-
terior mirrors w ith a plast ic scraper . To
357

Emergency assistance
Loosening the wheel bolts
Fig. 284 Wheel: loosening the wheel bolt
• Slide the wheel wrench (from the vehicle tool
kit) all the way onto the wheel bolt.
• Turn the wheel bolt approximately one turn to
the left -arrow-. To reach the required torque,
hold the end of the wheel wrench. If the wheel
bolt will not loosen, press carefully on the
whee l wrench with your foot. Hold onto the ve­
hicle securely while during this and make sure
your stance is stable .
A WARNING
To reduce the risk of an accident, only loosen
the wheel bolts gently (one turn) before rais­
ing the vehicle with the veh icle jack*.
Raising the vehicle
Fig . 28S Sill panels: markings
364
Fig. 286 Sill: positio ning the vehicle jack
• Place the veh icle jack* (vehicle tool kit) on a
firm s urface. Use a flat, stable support if neces­
sary. On a slippery surface such as tile, you
should use a non-slip pad (such as a rubber
mat)¢ &.
• Find the marking on the sill that is closest to
the tire that will be
changed¢ fig. 2 85 . Behind
the marking, there is a lifting point on the side
sill for the vehicle jack*.
• Turn the handwheel to raise the vehicle jack*
under the lifting point on the side sill until the
bracket on the jack @ completely covers the
notch on your vehicle.
• Align the vehicle jack* so the bracket @covers
the notch and the base ® is flat on the ground.
The base ® must be directly under the lifting
point @.
• Mount the crank on the vehicle jac k*: insert the
crank into the opening on the handwheel. Turn
the crank to the left or right to secure it.
• Continue ra is in g the veh icle jack* with the
crank until the wheel lifts off the ground slight­
ly.
A WARNING
- Ma ke sure the vehicle jack* is stable. Th ere
is a risk of injury when the ground is slick or
soft, because the vehicle jack* could slide or
sink.
- Only raise your vehicle with the vehicle jack*
provided by the factory . If you use a vehicle
jack designed for another vehicle, your vehi­
cle can slide and cause injury.
- Position the vehicle jack* only at the desig­
nated mounting points on the side sill and
align the jack. Otherwise, the vehicle jack*

Fuses and bulbs
Fuse color identification
Color Current rating
in amps
Black 1
Purple 3
Light brown 5
Brown 7 .5
Red 10
Blue 15
Yellow 20
White or transparent 25
Green 30
Orange 40
A WARNING
Do not repair fuses and never replace a blown
fuse with one that has a higher amp rating.
This can cause damage to the electrical sys­
tem and increases the risk of fire.
(D Note
If a new fuse burns out again shortly after you
have installed it, have the electrical system
checked as soon as possible by an authorized
Audi dealer or authorized Audi Service Facili­
ty .
Q) Tips
-The following table does not list fuse loca­
tions that are not used.
- Some of the equipment listed in the follow­
ing tables applies only to certain model ver­
sions or certain optional equipment.
370
Fuse assignment - driver's/front
passenger's footwell
Fig. 291 Driver's footwell (left-hand drive vehicle): fuse
panel with plas tic clip
Fig. 292 Front passe nger's footwell (right -hand drive vehi-
cle): fuse panel with plastic clip
Ill>

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Fuse panel © (brown)
4 Audi side assist
8 Smart module (tank)
11 12 Volt battery
12 Homelink
13 Rearview camera, peripheral cameras
14 Right tail lights
16 Right safety belt tensioner
Fuse panel © (red)
No . Equipment
2 Sound-amp
lifier
3 AdBlue heating
5 Trailer hitch (right light)
7 Trailer h
itch
8 Trailer hitch (left light)
9 Trailer h itch (socket)
10 Sport differential
11 AdBlue heating
Bulbs
Replacing light bulbs
For your safety, we recommend that you have
your authorized Audi dealer replace any bulbs for
you.
It is becoming increasingly more and more diffi­
cult to replace vehicle light bulbs since in many
cases, other parts of the car must first be re­ moved before you are able to get to the bulb.
This applies especially to the light bulbs in the
front of your car which you can only reach
through the engine compartment.
Sheet metal and bulb holders can have sharp
edges that can cause serious cuts, parts must be
correctly taken apart and then properly put back
together to help prevent breakage of parts and
l ong term damage from water that can enter
housings that have not been properly resealed.
For your safety, we recommend that you have
your author ized Audi dealer replace any bulbs for
you, s ince your dealer has the proper tools, the
correct bulbs and the expert ise.
Fuses and bulbs
Gas discharge lamps (Xenon lights) :
Due to the high e lectr ical voltage, have the bulbs
replaced by a qualified technician. Headlights
with Xenon light are identified by the high volt­
age sticker .
LED headlights*
LED headlights require no maintenance. Please
contact your authorized Audi dealer if a bulb
needs to be replaced .
.&, WARNING
Changing Xenon lamps without the necessary
equipment can cause serious personal injury.
- Bulbs are pressurized and can explode when
be ing changed. Potential risk of injury!
- On veh icles equipped with gas discharge
bu lbs (Xenon light) life-threatening injuries
can resu lt from improper handling of the
h ig h-vo ltage portions of such lamps!
- Only your authorized Audi dealer or quali­
fied workshop should change the bulbs in
gas discharge lamps. There are parts with
sharp edges on the openings and on the
bulb holders that can cause serious cuts. If
you are uncertain about what to do, have the work performed by an authorized Audi
dealer or qualified workshop. Ser ious per­
sonal injury may result from improperly per­
formed work.
(D Tips
- If you st ill prefer to replace the light bulbs
yourself, be aware that the engine compart­ ment is a hazardous area to work
in¢ A in
Working in the engine compartment on
page 323.
- It is best to ask your authorized Audi dealer
whenever you want to change a bulb .
373

Emergency situations
Emergency situations
General
This chapter is intended for trained emergency crews and working personnel who have the nec­
essary tools and equipment to perform these
operations.
Starting by pushing or
towing
(D Note
Vehicles with an automatic transmission
cannot be started by pushing or towing.
Starting with jumper
cables
If necessary, the engine con be started by con­
necting it to the battery of another vehicle.
If the engine should fail to start because of a dis­
charged or weak battery, the battery can be con­
nected to the battery of
another vehicle, using a
pair of jumper cables to start the engine.
Jumper cables
Use only jumper cables of sufficiently large cross
section
to carry the starter current safely. Refer
to the manufacturer's specifications.
Use only jumper cables with
insulated terminal
clamps which are distinctly marked :
plus(+) cable in most cases colored red
minus(-) cable
in most cases colored black.
A WARNING
Batteries contain electricity, acid, and gas.
Any of these can cause very serious or fatal in­
jury. Follow the instructions below for
safe
handling of your vehicle's battery.
-Always shield your eyes and avoid leaning
over the battery whenever possible.
-A dead battery can freeze at temperatures
around 32 °F (0 °C) . If the vehicle battery is
frozen, you must thaw it before connecting
the jump start cables.
If you do not, this in-
374
creases the risk of an explosion and chemi­
cal burns. After jump starting the vehicle,
drive to an authorized Audi dealer or author­ ized Audi Service Facility immediately to
have the vehicle battery checked.
- Do not allow battery acid to contact eyes or
skin . Flush any contacted area with water
immediately.
- Improper use of a booster battery to start a
vehicle may cause an explosion .
- Vehicle batteries generate explosive gases.
Keep sparks, flame and lighted cigarettes
away from batteries.
- Do not try to jump start any vehicle with a
low acid level in the battery.
- The voltage of the booster battery must also
have a 12-Volt rating. The capacity (Ah) of
the booster battery should not be lower
than that of the discharged battery. Use of
batteries of different voltage or substantial­
ly different
"Ah" rating may cause an explo­
sion and personal injury.
- Never charge a frozen battery. Gas trapped
in the ice may cause an explosion.
- Never charge or use a battery that has been
frozen. The battery case may have be weak­
ened.
- Use of batteries of different voltage or sub­
stantially different capacity (Ah) rating may
cause an explosion and injury. The capacity (Ah) of the booster battery should not be
lower than that of the discharged battery.
- Before you check anything in the engine
compartment, always read and heed all
WARNINGS
r=:> poge 323.
([) Note
-Applying a higher voltage booster battery
will cause expensive damage to sensitive electronic components, such as control
units, relays, radio, etc.
- There must be no electrical contact between
the vehicles as otherwise current could al­
ready start to flow as soon as the positive
(+) terminals are connected.

@ Tips
The discharged battery must be properly con­
nected to the vehicle's electrical system .
When jump starting or charg ing the battery,
never connect the negative ground cable to
the battery negative post because the battery
manager system must be able to detect the
battery's state of charge. Always connect the
negative ground cable to the negative ground
post of the battery manager control unit.
Using the jump start
cable
Both jump start cables must be connected in the
correct order!
Fig. 295 Engine compartment: connec tors for jump start
cables and a charger
Fig. 296 Ju mp starting us ing a battery in another vehicle:
@ -providing current, @-drained
The procedure described below for connecting
jumper cables is intended to prov ide a jump start
for your vehicle .
Vehicle with discharged battery
•Turnoff lights and accessories, move the auto­
matic transmission* selecto r lever to N (Neu­
tral) or P (Par k), and set the park ing brake.
Emergency situations
Connecting the positive cable (red) to the
positive terminal
• Open the red cover on the positive terminal
c:>fig. 295 .
1. Secure one end of the positive cable (red) to
the jump start pin
c:> fig. 296 (D (pin under
the red cover = "posit ive") on the vehicle that
needs to be started @.
2. Secure the other end of the positive cable
(red) to the positive termina l@ on the
bat­
tery provid ing the current @.
Connecting the negative cable (black) to the
negative terminal
3. Secure one end of the negative cable (black)
to the nega tive term inal @ on the battery
that is providing the current @.
4. Secure the other end of the negative cable
(black) to the jump start
pin @ (hex head pin
= "negative") on the vehicle that needs to be
started @.
Starting the engine
• Start the engine on the vehicle providing the
jump start @and let it run at idle.
• Now start the engine on the vehicle with the
drained battery @.
• If the engine does not start, stop the starting
procedure after 10 seconds and then repeat it
after approx imately 30 seconds.
• Remove the cables when the engines are run­
ning. Remove them in reverse order from the
way they were installed.
• Close the red cover on the positive terminal.
T he battery is vented to the outside to prevent
gases from enter ing the vehicle interior . Make
sure that the jumper clamps are well connected
with their
metal parts in full contact with the
battery terminals.
_& WARNING
-To avoid serious personal injury and damage to the vehicle, heed all warnings and instruc ­
tions of the jumper cable manufacturer. If in
doubt, call for road service.
-Jumper cables must be long enough so that
the vehicles do not touch .
..,_
375

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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.
- Always observe environmental 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 handling may apply, see
www .dtsc.ca.gov/hazardouswaste/perchlo­
rat e. When the vehicle or pa rts of the re­
straint system including airbag modules
safety be lts with pretens ioners are scrap­
ped, a ll applicab le laws and regulations
must be observed. Your a uthorized Audi
dealer is familiar with these requirements
and we recommend that you have your deal­ er perform this service for you.
Accessories and
technical changes
Additional accessories and parts
replacement
Always consult on authori zed Audi dealer before
purchasing accessories.
Audi vehicles that are constructed w ith advanced
materials like Steel/Aluminum (Hybrid construc­
tion), Aluminum (Audi Space Frame), and/or Alu­ minum/Carbon Fiber (Ultra Advanced Light
We ight Materials) are as unique as the ir drivers .
Therefore, the ava ilability of certain parts needed
for repair , restoration , or reconstruction wi ll be
restricted , or parts will be unava ilable, if the ve­
hicle is not repaired at an a uthorized Audi colli­
sion repair facility. This includes but is not limit­
ed to structura l parts which require specialized
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.
Consumer Inf ormation
This safety could be compromised by non-ap ­
proved changes to the vehicle. For this reason, if
parts have to be rep laced, please 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 also have the necessa ry facilities,
tools and trained specialists to install the parts
and accessories properly .
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 plate brackets in the
front area that are different 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 are triggered in an accident!
- Before you check anyth ing in the engine
compartment, always read and heed all
WARNINGS
9poge 323.
(D Note
- If items other than genu ine Audi spare
parts, add -on equipment and accessory
items are used or if repair work is not per­
formed according to specified methods, this
can result in seve re damage to your vehi­
cle's engine and body (such as corrosion)
and adversely affect your vehicle's warranty.
- If emergency repa irs must be performed
elsewhere, have the vehicle exam ined by an
authorized Audi dealer as soon as possib le .
- The manufacturer cannot be held liable for
damage which occurs due to failure to com­
ply with these stipulations .
385