2015 AUDI A4 engine light

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-To r educe the danger of explosion, never
connect or disconnect charger cables
while the charger is operating.
- Fast charg ing a battery is dangerous and
should only be attempted by a compe­
tent technician w ith the proper equip­
ment .
- Battery acid that may spill during charg­
ing should be washed
off with a solution
of warm water and baking soda to neu ­
t ralize the acid .
Never use a fast charger as a booster to
start the engine . This will seriously dam­
age sensitive elect ronic components, such
as control units, relays, radio, etc. , as we ll
as t he battery charger.
Battery replacement
The new battery must have the same specifi­
cations and dimensions as the original equip­
ment battery.
Intell igent energy management in your veh i­
cle is respons ible for d istr ibuting the e lectr i­
cal energy throughout you r vehicle
¢ page 191. T he inte lligen t en ergy ma nage­
men t system w ill keep the engine b attery
charged be tter then vehicles w ithout this sys­
tem . To make sure t he additional e lectrica l e n­
ergy is available once again after you have
changed t he battery, we recommend that you
install ba tteries of the same type and man u­
facture only (the same as t hose installed at
the t ime your vehicle was delivered) . Specifi­
cations a re listed on the battery hous ing . You r
author ized Audi dealer must code the bat tery
in the energy management system to enable
you to use the energy management functions
correctly after rep lac ing the battery .
I f it is not poss ible to use a battery of this
type, the new bat tery mus t have the s ame ca­
pacity, vo ltage ( 12-volts), ampe rage, con­
struction and pl ug sea ling.
Checkin g and fillin g 225
When installing the battery, make su re the ig ­
nition and a ll electrical consume rs a re turned
off.
Q) Note
M ake sure the ven tilat ion hose on the side
of the batte ry is connecte d, otherwise
fumes o r batte ry acid can leak out .
@ For the sake of the environment
Because o f the p rob lem of proper disposal
of a battery, we recommen d your author­
i zed A udi dealer change the battery for
you. Batteries contain sulfur ic acid and
l ead and must always be disposed of prop­
erly in comp liance with a ll environmental
r egula tions . Dispos ing of vehicle batter ies
i mprope rly is v ery dange rous to th e envi­
r o nmen t.
Windshield/headlight*
washer container
Fi g. 18 8 Eng in e co mpartm en t: Cove r o n th e w ind­
s h iel d a nd headlig ht• was her fluid conta in er
T he was her fluid conta iner is mar ked w ith the
symbol
O on its cap ¢ fig . 188, ¢page 214,
fig . 182.
.. Before yo u check any thing in t he engine
compa rtment,
alwa ys re ad and heed all
WARNINGS ¢ & in Working in the engine
compartment on page 212 .
.. Lift the fi ller cap tongue to add washer flu ­
id. You can f ill the container to t he top.
.. Press the cap back o nto the fi lle r neck after
filling the co nta iner .
You can find the reservo ir
capacity in the table
in ¢
page 281. 111>
•
•

260 What do I do now ?
What do I do now?
Vehicle tool kit
The tools ore stored underneath the floor
panel in the luggage comportment.
Fig. 195 Seda n Lu ggage compart ment : too l kit
Fig. 196 a llroa d Lu ggage compart men t: too l kit
When you need access to the vehicle tool kit
or jack* , you will need to take out the spare
tire and cover
Q page 260 .
Depending on your vehicle's equipment, the
tool kit may also be located under the cargo
floor cover @
Q fig. 196 behind the seat back­
rest .
The vehicle tool kit includes:
- Hook for removing wheel covers *
- Alignment pin for changing the wheel
- Screwdriver w ith reversible blade
- T ool for changing light bulbs
- Reversible bit (reversible Torx bit for chang- ing light b ulbs)
- Rod for jack
- Jack*
- Lug wrench
- Towing eye Some of the vehicle items listed above are
provided on certain mode
ls only or are option­
al extras.
Before ret urning the jack * to its p lace, re trac t
the jack arm f ully.
A WARNING
-
- Never use the screw driver hex head to
tighten wheel bo lts, since the bolts can­
not attain the necessary tightening tor­
que if you use the hex head, potentially
causing an acc ident .
- The factory-supplied jack is intended on­
ly for your vehicle model. U nder no c ir­
cumstances should it be used to lift
heavy veh icles o r othe r loads; you risk in­
juring yo urself .
- Never start the engine when the vehicle
is raised, wh ich could cause an acc ident.
- Support the vehicle securely with appro ­
priate stands if work is to be performed
underneath the vehicle; otherwise, there
is a potentia l risk for injury.
Space-saving spare tire
(compact spare tire)
Appl ies to veh icles : w ith space -sav ing spare tire
The spore tire/wheel is located in the luggage
comportment under the cargo floor cover . It
is intended for shor t-term u se only.
F ig. 197 Spa re ti re
Removing the spar e ti re
., lift the cargo floor by the p lastic handle
Q fig. 197 .
., Hook the handle into the luggage compart­
ment wea ther strip.

2 70 Fuses and bulbs
No. Consumer Amps No. Consumer Amps
A/C system pressure sensor, Two-door models: rear left
electromechanical parking window regulator; Four-
brake, Homelink, automatic 11 door models: rear
left door
30
3 dimming interior rear view
5 (window regulator, central
m irror, air quality/outside locking, switch, lighting)
air sensor, Electronic Stab ili-
12 Rain
and light sensor
5
zation Control (button)
5 Sound actuator 5
Fuse panel© (red)
6 Headlight
range control/
5/7,5
head light (corner ing light)
No . Consumer Amps
3 Lumbar support 10
7 Headlight (cornering light) 7,5
4 Dynamic steering
35
Contro l modu les (electro-
5 Interior lighting (Cabriolet)
5
8 mechanical parking brake,
5
shock absorber, quattro
sport), DCDC converter
9 Adaptive cruise control 5 6
W
indshield washer system,
35
headlight washer system
7 Vehicle electrical system
20
control module 1
10 Shift gate/clutch sensor
5
11 Side ass ist 5
8
Vehicle electr ica l system
30
control module 1
12 Headlight range control,
5
parking system 9 Left rear window regulator
7,5/20
motor (Cabriolet)/sunroof
13 Airbag 5
14 Rear wiper (allroad) 15 10
Vehicle e
lectrica l system
30
control module 1
15 Auxiliary fuse (instrument
10
pane l) 11 Right
rear window regulator
7,5/20
(Cabriolet)/sun shade motor
16 Aux
iliary fuse terminal 15
40
(engine area) 12 Anti-theft alarm warning
s system
Fuse panel
@ (brown)
No. Consumer Amps
2 Brake light sensor 5
3 Fuel pump 25
4 Clutch sensor 5
5 Left seat heating with/with-
15/30
out seat ventilation
6 Electronic Stabilization
Con-
5
trol (electric)
7 Horn 15
Front left door (window reg-
8 ulator, centra
I locking, mi r-
30
ror, switch, lighting)
9 Windshield wiper motor 30
10 Electronic Stabi
lization Con-
25
trol (valves)

272 Fuses and bulb s
No. Consumer
5 Electromechanical parking
brake
6 Electronic damping control
7
Electromechanical parking
brake
8 Rear exterior lighting
9 quattro sport
10 Rear exterior lighting
11 Central locking
12 Terminal
30
Fuse panel © (brown)
No. Consumer
1 Luggage compartment lid
contro l module (allroad)
2 12-volt
socket, cigarette
lighter
3 DCDC converter path 1
4 DCDC converter path 2,
so und amp lifier, radio
6
Right upper cab in heat ing
(Cabr iolet)
7
Electromechanical parking
brake
Right front door (w indow
9 regu lator, central locking,
mirror, switch, lighting)
1 0 Left upper cabin
heating
(Cabr iolet)
T wo -door models : rear right
window regu lator; Four-
11 door models: rear r
ight door
(window regulator, central
locking, sw itch, lighting)
12 Cell phone prep
Fuse panel © (black)
No. Consumer
1 Right front seat heating
4
MMI
5 Radio
6 Rear view camera
Amps
5
15
30
30
35
30
20 5
Amps
30
20
40
30
30
30
30
30
30
5
Amps
15
7,5
5
5
No . Consumer Amps
7 Rear window heater (all-
30
road)
8 Rear Seat Entertainment s
Bulbs
Replacing bulbs
For your safety, we recommend that you hove
your authorized Audi dealer replace any bulbs
for you.
It is becoming increasingly more and more
difficult to replace vehicle light bulbs since in
many cases, other parts of the car must first
be removed 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 long term damage from water that
can enter housings that have not been p roper­
l y resea led.
For your safety, we recommend that you have
you r authorized Aud i dea ler replace any bulbs
for you, since yo ur dealer has the proper too ls,
the correct bulbs and the expertise .
Gas discharge lamp s (Xenon lights)*:
Due to the high electr ical voltage, have the
bulbs replaced by a qualif ied techn ic ian.
Headlights wit h Xenon light are identified by
the high voltage sticker.
_&. WARNING
Changing Xenon lamps witho ut the neces­
sa ry equipment can cause serious persona l
injury.
- Bulbs are pressurized and can explode
when being changed. Potential risk of in­
jury!
-

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-On vehicles equipped with gas discharge
bulbs (Xenon light)* life-threatening in­
jur ies can result from improper handling
of the high-voltage portions of such
lamps!
- Only your authorized Audi dealer or
qualified workshop should change the
bulbs in gas discharge lamps. There are
parts w ith sharp edges on the openings
and on the bulb holders that can cause
serious cuts.
If yo u are uncertain about
what to do, have the work performed by
an authorized Audi dealer or qualified
workshop. Serious personal injury may
result from improperly performed work.
(D Tips
- If you still prefer to replace the light
bulbs yourse lf, be aware that the engine
compartment is a hazardous area to
work
inqpoge 212 ¢ A .
-It is best to ask your authorized Audi
dealer whenever you want to change a
bulb.
Fu ses and bulb s 273
•
•

2 7 4 Emergency situations
Emergency situations
General
This chapter is intended for trained emer­
gency crews and working per sonnel who
have the necessary tools and equ ipment to
perform these ope rations.
Starting by pushing or
towing
Q;) Note
Vehicle s with an automati c transmission
cannot be started by pushing or towing .
Starting with jumper
cables
If necessary, the engine can be started by
connecting it to the battery of another vehi­
cle.
If the engine should fail to start because of a
discha rged or wea k batte ry, the battery can be
connected to the battery o f
another vehicle,
using a
pair of jumper cables to start the en­
g ine .
Jumper cables
Use only jumper cab les of sufficiently
large cross section to carry the starter cur rent
safely. Refer to the manufact urer's spec ifica­
ti ons.
Use on ly jumper cables with
insulated te rmi­
na l clamps wh ic h are d istinctly mar ked :
plus (+) cable in most c ases co lore d red
minu s (-) cable
in most cases colored black .
A WARNING
Batterie s cont ain e lec tricity, a cid, a nd gas.
A ny o f these c an ca use ve ry ser io us or f atal
in ju ry . F ollow the i nstruc tio ns below for
safe ha ndling of your ve hicle's bat tery.
- Alw ay s sh ield yo ur eye s and a vo id le an­
ing over the batte ry w henever p ossib le . -
A discharged battery can freeze at tem­
pe rat ures just below 32 °F (0 °C). Before
connecting a jumper cable, you must
thaw the fr ozen battery complete ly , ot h­
e rwise it cou ld explode.
- Do not allow batte ry acid to contact eyes
or skin . Fl ush any contacted a rea wi th
wate r im media tely.
- Imp roper use of a booster battery to
s tart a vehicle may cause an explosion.
- Vehicle batter ies generate explosive gas­
es . Keep sparks, flame and lighted ciga­
rettes away from ba tte ries .
- Do not try to jump start a ny ve hicle w ith
a low ac id leve l in the battery .
- The vo ltage of the booster batte ry m ust
a lso have a 12-Vo lt rat ing . The capacity
(A h) of the booster batte ry should not b e
lowe r than that of the discharged bat­
tery . U se o f batt erie s of d iffe ren t voltage
or subs tanti ally diffe ren t "Ah" rat ing
may c ause an exp losion and person al in­
ju ry .
- N ever ch arge a fr ozen bat te ry. Gas t rap ­
ped in the ice may ca use an ex plosion .
- N ever ch arge o r use a batt ery th at has
been fro zen. T he battery case may have
be weakened.
- Us e of batt erie s of di ffere nt vo ltag e or
substan tially differen t ca pa city (Ah) rat ­
i ng may cause an exp losion and injury.
T he capac ity (Ah) of the booster battery
should not be lower than that of the dis­
charged batte ry.
- Before you check anything in the engine
compartment, always read and heed a ll
W ARNI NGS¢
page 212.
(D Note
- App lyi ng a hig her voltage booste r bat­
tery wi ll cause expens ive damage to sen­
sitive e lectronic components, such as
cont ro l units, relays, rad io, etc.
- There must be no electrical contact be­ twee n the vehicles as otherwise current
co uld already start to f low as soon as t he
posi tive(+) terminals a re con nected . ..,.

M N
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@ Tips
The discharged battery must be properly
connected to the vehicle's electrical sys­
tem. When jump starting or charg ing the
battery, never connect the negative
ground cable to the battery negat ive post
because the ba ttery manager system must
be ab le to detect the battery's state of
charge. Always connect the negative
g round cab le to the negative ground pos t
of t he battery manager cont ro l unit.
Use of jumper cables
Make sure to connect the jumper coble
clomps in exactly the order described b elow!
Fi g. 21 1 Eng ine co mpar tment: Co nnecto rs fo r jum per
c ab les a nd c har ge r
F ig. 212 Jump start in g w ith t he ba ttery of a not her ve ·
hi cle :@ booster battery, @ disc harged veh icle battery
The procedure described below for connecting
jumper cables is intended to provide a jump
start for your veh icle .
Vehicle with di scharged battery :
~Turnoff lights and accessories , move lever
of automatic transmission to N (Neutral) or P (Park) and set parking brake .
Emergency situ ation s 2 7 5
Connect POSITIVE(+) to POSITIVE(+ )
(red )
~ Remove the cover above the jump start con­
nection .
~ Open the cover on the positive pole
¢fig . 211 .
1. Connect one end of the red positive cable
on the
jump sta rt bolt c::;, fig. 212 (D
(Bolts under cove r= "posit ive ") of the ve­
hicle to be started @.
2 . Conne ct the othe r end to the pos itive ter -
mina l@ of the booster battery @.
Connect NEGATIVE (-) to NEGATIVE (-)
(black )
3. Co nnect one end o f the b lack neg ative c a­
ble to the nega tive te rmi na l@ of the
booster battery @.
4 . Connect the other end to the
jump start
bolt @
(Bolts with hex head = "negative")
of the vehicle to be started @.
Starting the engine
~ Start the engine of the ve hicle with the
booste r battery @. Run the engine at a
moderate speed.
~ Start engine with d ischarged vehicle battery
® in the usual manner .
~ If the engine fails to start: do not keep t he
starter cran king for lo nger than 10 seconds .
Wait for about 30 seco nds and the n try
aga in.
~ W ith engi ne runni ng, remove jumpe r cab les
from both vehicles in the exa ct
reverse o r­
der .
~ Close the cover on the positive pole .
T he b attery is vented to the o utside to p reven t
gases from en tering the veh icle in ter ior . Ma ke
s ur e that the j umper clamps a re well connect­
e d with their
metal ports in full contact with
the batte ry term inals.
A WARNING
To avoid serious personal injury and dam­
age to the vehicle, heed all warnings and
in structions of the jumper cable ma nufac-
turer . If i n dou bt, call for road servic e.
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Automatic climate control Air vents ... ..... ..... ... .. .. .. .... 80
Operation . . . . . . . . . . . . . . . . . . . . . . . . . 79
Setup ... .. ................. .. .... 81
Automatic S hift Lock (ASL) .. .. .. .. .. .. 95
Automatic transmission . . . . . . . . . . . . . . . 93
Automatic S hift Lock (ASL) . . . . . . . . . . . 95
D riving .. .. ............. .... .. .. .. 95
E mergency mode . . . . . . . . . . . . . . . . . . . 99
E me rgency release ........ .. .. .. .. . 100
Kick -down . . . . . . . . . . . . . . . . . . . . . . . . . 98
M anual shift program .. ... .. .. .. .. .. 98
Remova l lock (ignition key) ... .. .. .. .. 82
Selector lever . . . . . . . . . . . . . . . . . . . . . . 94
Automatic wipe rs . . . . . . . . . . . . . . . . . . . . 55
Auto Safety Hotline . . . . . . . . . . . . . . . . . 134
Average speed . . . . . . . . . . . . . . . . . . . . . . . 24
Avoid damag ing the vehicle .. .. .. .. .. . 193
B
Bag hooks . . . . . . . . . . . . . . . . . . . . . . . . . . 7 4
Battery . . . . . . . . . . . . . . . . . . . . . . . 16, 222
Battery location inside the luggage com -
partment .. .. ........... .. .. .. ... 222
Charging . ................ ... ... .. 224
Important warn ings when working on
the battery . ................ ... ... 222
J ump starti ng ............ .... .. .. . 274
L ow . .. .. .. .. .. ........... .. .. ... 19 1
Replacing the ba ttery .. ... .. .. .. .. . 225
State of charge . . . . . . . . . . . . . . . . . . . . 191
Winter operation . ..... ... .. .. .. .. . 222
Working on the battery .... .. .. .. .. . 222
B efore driving ............. .... .. .. . 126
Bio-ethanol (Fuel) ..... ..... .. .. .. .. . 208
Blended gasoline ... .... ... .. .. .. .. . 207
B lower (automatic climate cont rol) . . . . . . 80
Booster seats ............. .... .. .. . 173
B rake fl uid
Changing the brake fl uid ... .. .. .. .. . 22 1
Checking the brake fluid level ... .. .. . 221
Reservoir .. ............. .... .. ... 221
What is the correct brake flu id leve l? . . 221
What should I do if the brake fluid warn-
i ng light comes o n? .. ..... .. .. .. .. . 221
Inde x 289
Brake system . ..... ... .. .. ..... ... .. 221
Anti- lock b raking system ..... ... .. .. . 19
•
B rake assist system .. .. ..... ... .. .. 185 •
Brake fluid .. .. .. ................. 221
Brake fluid specifications for refill and re-
placement ...... .. ............... 221
B rake light defective ... .. .. ... ... .. . 21
B ra ke powe r ass ist unit ............ . 188
Br akes .. .. .. .. .. .. . .............. 188
Ceram ic bra kes . .. .... ........... .. 188
El ec tromechanica l parking brake ... .. . 87
Warning/indicator lights ..... ... .. .. . 15
Wor n brake pads symbo l . . . . . . . . . . . . . 20
B ra kin g
E mergency bra king f unct ion ..... .. .. . 89
braking guard . .. .... ... ....... ..... 101
Messages . . . . . . . . . . . . . . . . . . . . . . . . 109
Settings ........ .. ............... 108
Break -in per iod .. .. .... ............. 193
Tires ... .. .. .. .. .. ............... 193
Bul bs . ... .. .. .... .. . .. .. ..... ... .. 2 72
C
Califor nia Proposition 65 Warn ing . .. .. 213
B attery spec ifi c .. ............. .. .. 223
Capacities ........ .. ............... 281
Carbon pa rts
Cleaning . . . . . . . . . . . . . . . . . . . . 204, 205
Care ..... .. .. .. .... ... .......... .. 202
Cargo area
refer to L uggage compartment . . . 70, 132
Catalytic converter ... .. ...... ... .. .. 194
Cen te r armrest . . . . . . . . . . . . . . . . . . . . . . 62
Central lock ing .. .. ................. . 31
Cen tral lock ing switch ............. .. 35
Co nvenience key .. .. . .. .. .. ... ... .. . 35
Remote cont ro l key . . . . . . . . . . . . . . . . . 34
Ceram ic brake rotors
New brake pads .. ............. .... 188
Ce rtification . ... .... . ... ...... ... .. 286
Chang ing a flat t ire . .. ... ....... .... . 263
Chang ing a wheel .. ............. .... 263
Chang ing engine oil ............. .... 217
Checking Engine coolant level .... ....... .... . 218
Checking t ire pressure ............... 239