2015 AUDI A4 warning light

222 Check ing and filling
@ For the sake of the environment
Becau se of the pr oblem of proper disposa l
of brake flu id as we ll as the special tools
requ ired and the necessary expert ise, we
recommend that you have the brake fluid
changed by your author ized Audi dealer.
Battery
General information
Unde r normal operating conditions, the bat ­
tery in your Audi does not need any mainte ­
nance. With
high outside temperatures or
long daily dr ives we recommend that you have
the electro lyte level checked by an authorized
Aud i dea ler o r qualified workshop . The elec­
trolyte leve l sho uld a lso be checked each t ime
the battery is charged ¢
page 224.
Have the battery checked when you take your
ve hicle in for service . Yo u are well adv ised to
replace a bat tery that is older tha n 5 yea rs .
W ith certa in types of a irbag deployment, t he
battery is d isconnected from the vehicle elec­
tr ica l system fo r safety reasons ¢
& in Re­
pair, core and disposal of the airbags on
page 157.
Disconnecting the battery terminals
Some veh icle functions (power w indow regu­
lato rs, for example) are lost if the battery ter­
m inals a re discon nected. These functions have
to be re lea rned after the batte ry terminals a re
connec ted agai n. T o prevent this, the battery
should o nly be d isconnec ted from the vehicle
e lec trica l syste m when absolu tely necess ary
for repairs.
Vehicles not driven for long periods
I f yo u do not drive you r vehicle over a pe riod
of severa l days or weeks, elec trical co m po­
nen ts are gr adually cu t back o r swi tched off .
T his reduces energy consumption and main­
tains sta rting capab ility over a lon ger period
¢ page 191.
Some o f the conven ien ce f unct ions m ay no t
ope rate, su ch as the in ter ior lights o r the power seat adjus
tment. The convenience
funct ions wi ll be available again when yo u
tu rn on the ignition and sta rt t he engine.
Winter operation
Du ring the w inte r mon ths , b att ery capac ity
tends to dec rease as temperatures drop . This
is beca use more power is a lso consumed w hile
starting, and the headlights, rear win dow de­
f ogger, etc., are used more often.
Avoid unnecessa ry powe r consumpt ion, pa r­
ticu lar ly in ci ty traffic o r when traveling only
sho rt distances . Let yo ur autho rized A udi
dealer check the capacity of the vehicle bat ­
tery before w inter sets in ¢
page 224. A well
charged battery will not on ly prevent starting
problems when the weather is cold, but will
also last longer .
@ Tips
If your vehicle is left standing for seve ral
weeks at extremely low temperatures, the
vehicle battery s hou ld be removed and
s tored w her e it w ill not freeze. This will
preve nt i t fr om be ing d amaged and having
t o be repla ced .
Working on the battery
Be especially careful when working on or near
the battery.
The battery is located in the luggage compar t­
ment under the floor . Befo re you che ck any­
t hi ng in the luggage co mpartment,
read and
heed all WARNINGS
¢ .&, .
Always heed the safety warnings , when work­
i ng on the veh icle ba tte ry or the vehicle e le c­
t ric al sys tem to p reven t inju ry.
The following WARNINGS are very
important when working on the battery:
Always heed the following WARNING SYM ·
BOLS and safety precautions when working
on the battery .
®
Always wear eye protection .

'"" N
0 ::.,: co ,...., \!) 1.1'1 ,...., 1.1'1 ,....,
&
Battery acid contain s sulfuric acid. Al ·
wa ys wear glove s and e ye protection .
@
No
· sparks
- flame s
- smoking .
~
When a battery i s ch arged, it p roduce s
. hy drogen g as whi ch i s exp losive and
could cau se per sonal inju ry.
®
Always keep the batt ery well out of
re ach of children .
A WARNING
Whenever working on the battery or on
the electrical system, there is the r isk of
injury, acc ident and even fire. Read and
heed the following WARNINGS :
- Always wear eye protection. Do not let
battery acid or any lead particles get on
your sk in or cloth ing. Sh ield your eyes .
Explosive gases can cause blindness o r
other injury.
- Battery acid contains sulfuric acid . Sulfu­
ric acid can cause blind ness and severe
burns.
- Always wear gloves and eye p rotection.
Do not tilt the battery because ac id
could leak out of the vent ilation open ­
ings.
- If you get battery acid in yo ur eyes or
on your sk in, immed iately r inse with
cold water for severa l m inutes and get
medical attention.
- If you should ingest any battery acid,
seek med ica l attention immediately.
- Do not expose the battery to an open
flame, electric sparks or an open light.
- Do not smoke.
- Do not interchange the positive and neg-
ative cab les .
- When working on the battery, be sure
not to short-circuit the terminals with
tools or other metal objects. This would cause the battery to heat up very quickly,
wh ich could lead to damage or explosion
and personal injury.
-
Checkin g and fillin g
-When a battery is charged, it produces
hyd rogen gas which is explos ive and
could cause personal injury.
- Always keep the battery well out of the
reach of children.
- Before work is done on the elect rical sys ­
tem, disconnect the negative ground ca­ ble.
- Before performing any work on the e lec­
trical system, switch
off the eng ine and
ignit ion as well as any electrical equip­
ment. The negative cable on the battery
must be disconnected. If yo u are just go­
ing to replace a light bulb, then it is
enough to switc h
off the lights.
- Before disconnecting the battery, switch
off the anti-theft alarm system! Other­
wise you wi ll set
off the al arm.
- When disconnecting the battery, first
discon nect the negat ive cab le and then
the posit ive cab le.
- Before reconnecting the batte ry, ma ke
sure all e lectr ica l cons umers are sw itch ­
ed off . Re connect the pos it ive cable first
and then the negative cable. Neve r in ter ­
change the cables -this could start a fire!
- Never cha rge a frozen or a thawed-out
battery.
It could exp lode! If a battery has
frozen, then it must be replaced . A dis­
charged battery can freeze over at 32°F
(QOC).
- Make s ure the vent hose is always attach­
ed to the opening on the side of the bat­
tery.
- Never use batteries which are damaged.
There is the danger of an explosion! A l­
ways rep lace a damaged batte ry.
A WARNING
Ca lifornia Proposition 65 Warning:
- Battery posts, terminals and related ac­
cessories conta in lead and lead com­
pounds, chemicals known to the State of
Ca lifornia to cause cance r and reproduc­
tive problems. Wash hands after han- dling.
~
223
•
•

"" N
0 ::.,: co ,...., \!) 1.1'1 ,...., 1.1'1 ,....,
-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>
•
•

Tires and wheels 241
-Turn the valve stem cap coun- ize the new tire pressures in the •
ter-clockwise to remove it tire pressure monitoring sys-• '
from the tire valve. tern*
¢ page 257.
-Place the air pressure gauge
A WARNING
on the valve.
Incorrect tire pressures and/
-The tire pressures should only or underinflation can lead
be checked and adjusted when sudden tire failure, loss of
the tires are cold. The slightly control, collision, serious per-
raised pressures of warm tires sonal injury or even death.
must not be reduced. -When the
ti] warning sym-
-Adjust the tire pressure to the bol appears in the instru-
load you are carrying. ment cluster, stop and in-
-Reinstall the valve stem cap spect the tires.
on the valve. -Incorrect tire pressure and/
When should I check the tire or underinflation can cause
pressure? increased tire wear and can
The correct tire pressure is es- affect the handling of the
pecially important at high vehicle and stopping ability.
speeds. The pressure should -Incorrect tire pressures
therefore be checked at least and/or underinflation can
once a month and always be- also lead to sudden tire fail-
fore start ing a journey. Do not ure, including a blowout
forget to check the tire pres- and sudden deflation, caus-
sure for the spare wheel. ing loss of vehicle control.
When should I adjust the
-
The driver is responsible for
the correct tire pressures for
tire pressures?
all tires on the vehicle. The
Adjust the tire pressure to the applicable pressure values
load you are carrying. After are located on a sticker on
changing a wheel
or replacing the driver's side B-pillar.
wheels you have to adjust the
'"" N
0 tire pressures on all wheels. In ::.,: co ....
addition, you must then initial-\!) 1.1'1
.... 1.1'1 ....

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,...., ..,., ,....,
-the spa re tire* /inflatable spare tire* is
mounted.
Warning symbols
[IJ Loss of pressure in at least one tire¢,&. .
Check the tire or tires and replace or repair if necessa ry. The indicator light
[IJ in the instru ­
ment cluster also illuminates
¢page 13.
Check/correct the pressures of all four tires
and resetTPMS via radio or MMI*.
mm (T ire Pressure Monitoring System) Ti re
pre ssure: S ystem m alfuncti on!.
1tE appea rs after sw itching the ign it ion on
or while d rivi ng and the ind icator light
[IJ in
the instrument cluster blinks for approxi­ mately one minute and then stays on, there is
a system malfunction. Attempt to store the
correct t ire pressure ¢
page 259. If the indi­
cator light does not turn off or if it turns on
shortly thereafter, immediately drive your ve­
h icle to an authorized Audi dealer or author­
ized repair facility to have the malfunction
corrected.
.&, WARNING
- If the t ire pressure indicator appears in
the instrument cl uster d isplay, one or
more o f your tires is significantly under­
inflated. Reduce your speed immediately
and avoid any hard steering or braking
maneuvers. Stop as soon as possible and
check the t ires and the ir pressures. In­
flate the tire pressure to the proper pres­
sure as indicated on the vehicle 's t ire
pressure label~
page 234 . Driving on a
significantly under-inflated tire ca uses
the tire to overhea t and can lead to tire
failure. Under-inflation also is likely to impair the vehicle 's handling and stop ­
ping ability.
- The driver is responsible for mainta ining
the correct tire pressures. You must check the tire pressures regularly .
- Under certain cond itions (such as a spor ­
ty driving style, winter conditions or un­ paved roads), the pressure monitor indi­
cator may be de layed .
Tire s an d wheel s 259
-Ask your a uthorized Audi dea ler if run­
flat tires may be used on your vehicle.
(D Tips
- The tire pressure mon itoring system may
stop working when there is an ESC ma l­
function.
- Using snow chains may res ult in a system
ma lfunction.
- The tire pressure mon itor ing system on
your Audi was deve loped using tires with
the "AO" or "RO" identification on the
tire s idewall
~ page 248. We recom­
mend us ing these tires.
Reset tire pressure monitoring system
App lies to vehicles: with tire pressure mon itor ing system
If the tire pressure is adjusted, wheels ore ro­
tated or changed, the TPMS must be reset via
radio or MMI*.
... Before storing the new tire pressures, check
that the current pressures on all four tires
correspond to the specified va lues and
adapt the pressures to the current load
¢ page 234.
.,. Switch on the ignition.
.,. Select: the
I CARI funct io n button > Tir e pre s­
s ure mon itoring
> Store now . Or
.,. Select: the
I CARI fu nct ion button > Car sy s­
tem s*
contro l button > S erv icing & che cks >
Tire pres sure mon itor in g > Store tire pre s­
s ures
> Yes, sto re now .
(D Tips
Do not store the tire pressure if there are
snow chains on the tire . Otherwise, a sys­
tem mal function may occur.
•
•

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.

264 What do I do now?
also ¢ page 264, Decorative wheel cov­
ers
or ¢ page 264, Wheels with wheel
bolt caps.
2 . Loosen the wheel bolts ¢ page 265.
3. Locate the proper mounting point for the
jack and align the jack below that point
¢ page 265.
4. Lift the car with the jack¢ page 265 .
5. Remove the wheel with the flat tire and
then install the
spare tire¢ page 266 .
6 . Tighten all wheel bolts lightly.
7 .
Lower the ve hicle with the jack .
8 . Use the wheel bolt wrench and
firmly
tighten all whee l bolts in a crisscross pat­
tern
¢ page 265.
9. Replace the decorative wheel cover* or
the
wheel bolt caps* .
A WARNING
Always read and follow all WARNINGS and
information
¢ .&. in Raising the vehicle on
page
266 and ¢ page 267.
After changing a wheel
A wheel change is not complete without the
doing the following .
.,. Always store the vehicle tool kit, the jack*,
and the replaced tire in the l uggage com­
partment ¢
page 132 .
.,. Check the tire pressure of the spare tire as
soon as possible .
.,. As soon as possible, have the
tightening
torques
on all wheel bo lts checked with a
torq ue wrench . The correct tightening tor­
que is 90
ft lbs. (120 Nm).
.,. Have the flat tire
replaced as soon as possi­
ble .
(j) Tips
-If you notice that the whee l bolts are
corroded and difficult to turn while
changing a t ire, they should be replaced
before you check the tighten ing torque.
- Drive at reduced speed until you have the
tightening torques checked .
Decorative wheel covers
Applies to vehicles: with decorative whee l covers
The decorative wheel covers must be removed
first to access the wheel bolts .
Fig. 200 C ha ng in g a w hee l: removing th e w heel cover
Removing
.,. Insert the hook provided with the vehicle
tool kit in the hole in the hub.
.,. Pull off the
decorative wheel cover
qfig. 200.
Wheels with wheel bolt caps
Applies to vehicles: with wheel bolts with caps
The caps must be removed first from the
wheel bolts before the bolts can be un­
screwed .
Fig. 201 Changing a wheel: removing t he wheel bolt
caps
Removing
.,. Push the plastic clip provided with the vehi­
cle tool kit over the wheel bolt cap until it
engages.
.,. Pull on the
plastic clip to remove the cap
qfig. 201.

266 What do I do n ow ?
c:> fig. 203 . Behind the marking, there is a
lifting p oint on the sill for the veh icle jack.
• Turn the
veh icle j ack located under the lift­
ing point on the si ll to raise the jack until
the jaw
c:> fig. 204 ® covers the notch on
the vehicle
c:> &_ c:>(D .
• Align t he vehicle jack so the jaw ® covers
the notch and the base plate @ is flat on
the floor. The base plate @ must be
vertical
under the lifti ng point @.
• Install the rod on the vehicle jack: Insert the
rod into the opening on the handwheel. Turn
the rod left or right to secure it .
• Contin ue raising the jack with the rod until
the wheel lifts off the ground slightly.
Position the vehicle jack
onl y under the desig­
nated lifting points on the sill
c:> fig. 203 .
There is exactly one location for each wheel.
The jack must not be positioned at any other location
c:> ,&. c:>(D .
Soft ground under the jack can cause the ve­
hicle to slip off the jack. Always place the jack
on firm ground. Use a flat, stable support if necessary . Use a non-slip surface such as a
rubber mat on a
slipp ery surfac e such as tile .
A WARNING
-You or your passengers could be injured
wh ile chang ing a wheel if you do not fol­
low these safety precautions :
- Position the vehicle jack only at the
des ignated lifting points and align the
jack. Otherwise, the vehicle jack could slip and cause an injury if it does not
have sufficient hold on the veh icle .
- A soft or unstable surface under the
jack may cause the veh icle to slip off
the jack . A lways provide a firm base for
the jack on the ground.
If necessary,
use a sturdy board under the jac k.
- On hard, slippery surface (such as tiles)
use a rubber mat or similar to preven t
the jack from s lipping.
- T o help p revent injury to yourself and
yo ur passengers: -
Do not raise the vehicle until you are
sure the jack is securely engaged.
- Passengers must not remain in the ve­
hicle when it is jacked up.
- Make sure that passengers wait in a
safe place away from the veh icle and
well away from the road and traffic .
- Make sure jack pos ition is correct, ad­
j ust as necessary and then cont inue to
raise the jack.
(D Note
Do not lift the vehicle by the sill. Position
the veh icle jack only at the designated lift­
i ng points on the sill. Otherwise, your vehi­
cle will be damaged.
Taking the wheel off/installing the spare
tire
Follow these instructions step-by-step for
changing the wheel .
Fig. 205 C ha nging a w hee l: us ing t he screwd rive r han ­
dle (w it h th e blade re m oved) to turn the bolts
Fig . 206 Ch ang ing a w hee l: alignment p in in side t he
top hole
After you have loosened all wheel bo lts and
raised the vehicle off the g round, remove and
replace the wheel as follows: .,..