2015 AUDI A5 warning light

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-To avoid being burned, do not spi ll anti­
freeze or coolant on the exhaust system or hot engine parts. Under certain condi­
tions, the ethylene glycol in engine cool­ ant can catch fire.
- Antifreeze is poisonous. Always store anti­
freeze in its original conta iner and well out
of the reach of ch ildren .
-If you drain the coolant, it must be caught
and safely stored in a proper container
clearly marked "poison" .
(D Note
-Do not add coolant if the expansion tank is
empty . Air could enter the cooling system
and damage the eng ine .
If this is the case,
do not continue driving. Seek profess ional
ass istance.
- Coolant pollutes the env ironment and could
cause an eng ine fire . Excess coolant will be
fo rced out through the pressure relief valve
i n the cap when the eng ine becomes hot.
- If, i n an emergency , only water can be add­
ed, the correct ratio between wa ter and an­
tifreeze
i::;, page 196 must be restored as
soon as possib le .
@) For the sake of the environment
Drained coolant should not be reused. Always
dispose o f used coolant while observ ing all
environmental regulations .
Radiator fan
The radiator fan switches on automatically by it­
self.
The radiator fan is driven by the engine via the V­
be lt . The viscous clu tch regulates the speed of
the fan ac cording to the temperature of the cool ­
ant.
An auxiliary e lectr ic rad iator fan* switches on and
off depend ing on coolant temperat ure and othe r
veh icle operati ng conditions.
Afte r you switch the engine off, the auxiliary fan
can continue runn ing for up to 10 minutes -even
Ch eck in g and Fillin g
with the ignition off . It can even sw itch on again
later by itself¢& , if
- the temperatu re of the engine coo lant rises due
to the heat build- up from the engine in the en­
gine compartment, or
- the engine compartment heats up because the
veh icle is parked in intense sun light .
A WARNING
-To reduce the risk of persona l injury never
touch the radiator fan .
- The auxiliary electric fan is temperature con­ trolled and can switch on suddenly even
when the engine is not running.
- The a uxiliary radiator fan sw itches on auto­
matica lly when the engine coolant reaches a
certain temperature and will continue to run
until the coolant temperature drops.
Brake fluid
Checking brake fluid level
The brake fluid level can be checked with a quick
glance .
Fig. 1 65 Engine compar tment : Cove r on the b rake fl uid
r e servoir
Before you check anyth ing in the engine compart ­
ment,
al way s read and h eed all WARNIN GS
¢ _.& in Working in the engine compartment on
page 191 .
.,. Read the brake fluid level from the b rake fluid
reservoir
¢ fig. 165, ¢page 193, fig . 161 . The
brake fluid level must be between the
"MIN "
and "MAX " markings.
19 9

Checking and F ill in g
The brake fluid reservoir is located at the rear
partition of the engine compartment on t he left
side
c!,> page 193.
The fl uid level may drop slightly after some time
due to the automatic adjustment of the brake
pads. This is not cause for alarm.
If the b ra ke fluid level fal ls considerably below
the "MIN" mark, the brake warn ing/indicator
light (U.S. models:
1111 , Canadian models: . )
will come on
c!,> page 15 . Do not contin ue to oper­
ate the vehicle . The complete brake system
should be thoroughly checked by an author iz ed
Aud i dealer or qualified workshop and the cause
corrected . If the brake fluid level is too low, the
brake warning/ind icator light w ill illuminate .
Contact an authorized Audi dealer
i mmed iately .
{D) Tips
The brake fluid reservoir is located under­
neath the cove r.
Changing brake fluid
Have the brake fluid changed by an experienced
technician .
Brake fluid absorbs moist ure from the a ir. If the
water content in the brake fluid is too high, cor­ rosion in the brake system may result after a peri­
od of time . The boiling point of the brake flu id
w ill also decrease conside rably and dec rease
b rak ing perfo rmance.
Therefore, the brake flu id must be changed
e ve ry
two year s.
Always use new brake fluid w hich con­
forms to Fede ral Motor Vehicle Standard "FMVSS
1 16 DOT 4".
The brake fluid rese rvoir can be difficult to reach,
therefo re , we recommend that you have the
b rake fluid changed by your author ized
Audi
dealer .
Your dealer has the correct too ls , the
right brake fluid and the know-how to do t his for
you.
A WARNING
- B rake fluid is poisonous. It must be stored
on ly in the closed original container out of
the reach of children!
200
- Brake fail ure can resu lt from o ld or inappro­
priate brake fluid. Observe these precau ­
tions:
- Use only b rake fluid that meets SAE spec i­
f ica tion
J 170 3 and conform s to Federa l
Motor Vehicle Standard 116. Always check
with yo ur autho rized Audi dea le r to make
su re you are using the correct brake fl uid.
The correct type of brake flu id is also ind i­
cated on the brake fluid reservoir.
- The brake fl uid must be new. Heavy use of
the brakes can cause a vapor lock if the
brake f luid is left in the system too long.
This can seriously affect the efficiency of
the brakes as well as your safety. This
could result in an acc ident.
(D Note
Brake fluid will damage the paint of your vehi­
cle.
@ For the sake of the env ironment
Because of the prob lem of prope r disposal of
brake fluid as well as the special tools re­
qu ired and the necessary expert ise, we rec­
omme nd that you have the brake flu id
changed by you r autho rized Aud i dea le r.
Battery
, General information
U nder normal operating conditions, the battery
i n your Audi does not need any maintenance.
Wi th
high outside temperatures or long daily
drives we recommend that you have the e lectro ­
lyte level checked by an a uth orized Aud i deale r o r
qualified workshop . The electrolyte leve l should
a lso be checked each time the batte ry is c ha rged
c:!,> page 202.
Have the battery checked when yo u take your ve­
hicle in for service . You a re well adv ised to re­
pla ce a battery that is older tha n 5 years.
With certain types of airbag deployment, the bat ­
te ry is disconnected from the veh icle elect rical
system for safety reasons
c:!,> & in Repair, care
and disposal of the airbags on page 1 42.

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Disconnecting the battery terminals
Some vehicle functions (power window regula­
tors , for example) are lost if the battery termi­
nals are disconnected. These functions have to be
re learned after th e battery terminals are con­
nected again. To prevent this, the batte ry should
only be disconnected from the ve hicle electrical
system when absolutely necessary for repairs.
Vehicles not driven for long periods
If you do not drive your vehicle over a period of
several days or weeks, e lectrica l components are
gradually cut back or switched off. This reduces
energy consumption and maintains starting ca­ pability over a longer period
c:> page 175 .
Some of the conven ience functions may not oper­
ate, such as the interior lights or the power seat
adjustment. The convenience functions will be
available aga in when you turn on the ignition and
start the engine.
Winter operation
During the winter months, battery capacity tends
to decrease as temperatures drop. This is because
more power is also consumed while s tart ing, and
the headlights, rear window defogger, etc ., are
used more often .
Avoid unnecessary power consumption, part icu­
larly in city traffic or when traveling only short
d istances . Let your authorized Aud i dealer check
the capacity of the vehicle battery before w inter
sets in ¢
page 202 . A well charged battery will
not only prevent starting problems when the
weather is cold, but will also last longer.
(D Tips
If your vehicle is left standing for severa l
weeks at extremely low temperatures, the ve­
hicle battery should be removed and stored
where it will not freeze. This will prevent it
from being damaged and having to be re­ placed.
Checking and Filling
Working on the battery
Be especially careful when working on or near
the battery.
The battery is located in the luggage compart­
men t under the floor. Before you check anything
in the luggage compartment ,
read and heed all
WARNINGS
c:> .&_ .
Always heed the safety warnings, when working
on the vehicle battery or the vehicle electr ical
system to prevent injury .
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.
A
Battery acid contains sulfuric acid. Al-
ways wear gloves and eye protection.
@
No
- sparks
- flames
- smoking.
~
When a battery is charged, it produces
hydrogen gas which is explosive and
could cause personal injury.
®
Always keep the battery well out of reach
of children.
A WARNING
= -
Whenever working on the battery or on the
e lectr ical system, there is the risk of injury,
accident and even f ire. Read and heed the fol ­
lowing WARNINGS:
- Always wear eye protection . Do not let bat­
tery ac id or any lead particles get on your
skin or clothing. Shield your eyes. Exp losive
gases can cause blindness or other in jury.
- Battery acid conta ins sulfuric acid . Sulfuric
acid can cause blindness and severe burns.
- Always wear g loves and eye protection. Do
not tilt the battery because acid could leak
out of the ventilation openings. ...,
201

Checking and Filling
-If you get battery acid in your eyes or on
your skin, immediately rinse with cold wa­
ter for several minutes and get medical at­
tention .
- If you should ingest any battery acid, seek
medical 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 nega-
tive cables.
- When working on the battery , be sure not to
short-circuit the terminals with tools or oth­
er metal objects . This would cause the bat­
tery to heat up very quickly, which could lead to damage or explosion and personal
injury .
- When a battery is charged, it produces hy­
drogen gas which is explosive and could
cause personal injury.
- Always keep the battery well out of the
reach of children .
- Before work is done on the electrical sys­
tem, disconnect the negative ground cable .
- Before performing any work on the electri­ cal system, switch off the engine and igni­
tion as well as any electrical equipment. The negative cable on the battery must be dis­
connected. If you are just going to replace a
light bulb, then it is enough to switch off
the lights.
- Before disconnecting the battery, switch off
the anti-theft alarm system! Otherwise you
will set off the alarm.
- When disconnecting the battery, first dis­
connect the negative cable and then the
positive cable.
- Before reconnecting the battery, make sure
all electrical consumers are switched off. Re­
connect the positive cable first and then the
negative cable. Never interchange the ca­
bles -this could start a fire!
- Never charge a frozen or a thawed-out bat­
tery. It could explode! If a battery has fro ·
zen, then it must be replaced. A discharged
battery can freeze over at 32°F (0°C).
- Make sure the vent hose is always attached
to the opening on the side of the battery .
202
-Never use batteries which are damaged.
There is the danger of an explosion! Always
replace a damaged battery.
A WARNING
California Proposition 65 Warning:
- Battery posts, terminals and related acces­
sories contain lead and lead compounds,
chemicals known to the State of California
to cause cancer and reproductive problems .
Wash hands after handling .
(D Note
- Do not disconnect the vehicle battery when
the ignition is switched on or when the en­
gine is running, otherwise, you will damage
electronic components in the electrical sys­
tem .
-If your vehicle is going to stand for a long
period of time without being driven, protect
the battery from "freezing", otherwise it
will be damaged and will then have to be re­
placed .
Battery charging
Starting the engine requires a well charged bat­
tery.
Fig. 166 E n g in e compar tmen t: C on nectors fo r charger and
jump er cables
Always read and heed all WARNINGS below
9 A and ¢ A in Working on the battery on
page 201.
.,. Turn off the ignition and all electrical consum­
ers.
.,. Make sure the area is well ventilated when you
charge the battery.
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Wheels
Check/correct the pressures of all four tires and
store the pressure again in the Infotainment sys­
tem
c!) page 224.
mm (Tire Pressure Monitoring System) Tire pres­
sure: System malfunction!.
If m appears after
switching the ignition on or while driving and the
[I] i ndicator light in the instrument cluster
blinks for approximately one minute and then
stays on, there is system malfunction. Try to
store the correct tire pressures
c:> page 224 . If
the indicator light does turn off or turns on again
after a short period of time, drive to your author­
ized Audi dealer or qualified repair facility imme­
diately to have the malfunction corrected.
A WARNING
-If the tire pressure indicator appears in the
display, reduce your speed immediately and
avoid any hard steering or braking maneu­
vers. Stop as soon as possible and check the
tires and their pressure.
- The driver is responsible for maintaining the
correct tire pressure. You must check the
tire pressure regularly.
-Under certain conditions (such as a sporty
driving style, winter conditions or unpaved
roads), the tire pressure monitoring system
indicator may be delayed.
- Do not use run-flat tires on your vehicle. Us­
ing them when not permitted can lead to
vehicle damage or accidents.
(D Tips
- The tire pressure monitoring system can al­
so stop working when there is an ESC mal­
function.
- Using snow chains may result in a system
malfunction.
- The tires with the identification "AO" or
"RO"
c:> page 212 have been matched with
your Audi tire pressure monitoring system.
We recommend that you use these tires.
224
· Storing tire pressures
App lies to vehicles: wit h tire press ure mo nitor ing system
If the tire pressure changes or a tire is replaced,
it must be confirmed in the Infotainment sys­
tem .
.,. Make sure before storing that the tire pressures
of all four tires meet the spec ified values and
are adapted to the load
c!) page 215.
.,. Switch the ignition on.
.,. Select: the
I CARI function button > Tire pres­
sure monitoring
control button. Or
.,. Select: the
I CARI function button > Car Sys­
tems*
control button > Servicing & checks >
Tire pressure monitoring.
(D Tips
Do not store the tire pressures if snow chains
a re i nsta lied.

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Emergency assistance
Vehicle tool kit
The tools ore stored underneath the floor panel
in the luggage comportment.
Fig. 173 Luggage compartme nt: tool kit
When you need access to the veh icle tool kit or
jack*, you will need to take out the spare t ire*
and cover¢
page 225.
The vehicle tool kit includes:
- Hook for removing wheel covers*
- Plastic hook to remove wheel bolt covers*
- Alignment pin for changing the whee l
- Screwdriver w ith reversible blade
- Tool for chang ing light bulbs
- Reversible bit (reversible Torx bit for changing
light bulbs)
- Rod for jack
- Jack*
- Lug wrench
- Towing eye
Some of the vehicle items listed above are prov id­
ed on certain models only or are optional extras.
Before returning the jack* to its place, retract the
jack arm fu lly.
_& WARNING
- Never use the screw driver hex head to
t ighten whee l bolts, since the bolts cannot
attain the necessary tightening torque if you
use the hex head, potentially causing an ac­
cident.
- The factory-suppl ied jack is intended only
for your vehicle model. Under no c ircum­
stances should it be used to lift heavy
Emergen cy assistance
vehicles or other loads; you risk injuring
yourself.
- Never start the engine when the vehicle is
raised, which could cause an accident.
- Support the vehicle securely with appropri­
ate stands if work is to be performed under­
neath the vehicle; otherwise, there is a po­
tential risk for injury.
Space-saving spare tire
(compact spare tire)
Applies to vehicles: with space-saving spare tire
The spore tire/wheel is located in the luggage
comportment under the cargo floor cover. It is
intended for short-term use only.
Fig. 174 Spare tire
Removing the spare tire
.,. Lift the cargo floor by the p lastic handle
¢fig. 174.
.,. Hook the handle into the luggage compart­
ment weather strip.
., Turn the large screw ¢
fig. 174 counter-clock­
wise.
., Take out the spare ti re .
., Always store the vehicle tool kit, the jack*, and
the replaced tire in the luggage compartment
¢page 118.
.,. Unhook the cargo floor before closing the rear
lid.
Using the spare tire (compact spare tire)
The compact spare tire is only intended for emer­
gencies until you can reach a repa ir shop. Replace
it as quickly as possible with a standard wheel
and tire. ..,
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the wheel diagona lly opposite the wheel be­
ing changed with the folding chocks or ot h­
er objects. When one front wheel is lifted
off the ground, placing the Automatic Trans­
mission in "P" (Pa rk) wi ll
not prevent the ve­
hicle from moving .
- Before you change a wheel, be sure the
ground is level and fi rm.
If necessary, use a
sturdy board under the jac k.
- Always store the vehicle tool kit, the jack*
and the replaced tire in the luggage com­
partment c::>
page 118 .
(D Note
If you are chang ing the wheel o n a steep in­
cline, use a rock or sim ila r object to block the
opposite whee l to prevent the vehicle from
moving.
@ Tips
Obey a ll laws.
Changing a wheel
When you change a wheel, follow the sequence
described below step -by -step and in exactly that
order.
1. Remove the decorati ve w heel co ver* or the
w he el bolt caps *. For more details see a lso
c::> page 22 7, Decorative wheel covers or
c::> page 228, Wheels with wheel bolt caps .
2. Loosen the whe el bolt s c::> page 228.
3. Lo cate the proper mo unti ng po int for the
jack and align the jack below tha t point
c::> page229.
4. Lift the car wit h the jack c::> page 229.
5. Remove the wheel with the flat tire and then
install the
spare t ire c::> page 230.
6 . Tighten all wheel bo lts light ly.
7 .
Low er the veh icle w ith the jack.
8 . Use the wheel bolt wrench and
firmly tighten
9.
all whee l bolts in a crissc ross pattern
c::> page 228.
Replace t he de corative wh ee l c over* or the
whe el bolt cap s*.
Em erg en cy ass is tan ce
A WARNING
-Always read and follow all WARNINGS and in-
formation
c::> .&. in Raising the vehicle on
page
229 and c::> page 231.
After changing a wheel
A wheel change is not complete without the do­
ing the following.
.. Always store the vehicle tool k it, the jack*, and
the replaced t ire in the luggage compartment
c::>page 118.
.. Check the tir e pr essure of the spare ti re as soon
as poss ible .
.. As soon as possib le, have the
tightening to r­
que s
on a ll whee l bolts checked wi th a torque
wrench . Th e cor rect tigh tening torque is 90 ft
lbs .
(120 Nm).
.. Have the flat tire
replaced as soon as possible.
@ Tips
- If you not ice tha t the wheel bo lts are cor­
roded and difficult to turn while changing a
tire, they should be replaced before you check the tightening torque.
- Dr ive at reduced speed until you have the
tightening torques checked .
Decorative wheel covers
Applies to vehicles: with decorative w heel covers
The decorative wheel covers must be removed
first to access the wheel bolts .
Fig. 1 75 Chang ing a w heel: re m ovi ng t he w heel cove r
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Raising the vehicle
The vehicle must be li~ed with the jack first be­
fore the wheel can be removed .
·- ·
Fig . 178 Sill panels: marking s
Fig . 179 S ill: posit ion ing the vehicl e jack
The location of the jack point is indicated by an
indentation on the underside of the vehicle
¢ fig. 178.
.,.. Activate the pa rkin g brake to prevent the vehi­
cle from rolling unintentionally .
.,.. Shift into
1st gea r on vehicles with manua l
transmission or move the selector lever to the P
pos ition on vehicles with automatic transmis­
sion.
.,.. Find the
marking (imprint) on the sill that is
nearest the wheel that w ill be changed
¢ fig . 178. Behind the marking, there is a lift­
ing point
on the sill for the vehicle jac k.
.,.. Turn the
veh icle jack loca ted under the lifting
point on the si ll to raise the jack until the jaw
r:=;, fig. 179 @ covers the notch on the vehicle
¢A ¢ 0 .
.,.. Align the 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
lifting point @.
Em erg en cy ass is tan ce
.,.. Insta ll the rod on the vehicle jack : Insert the
rod into the opening on the handwheel. Turn
the rod left or r ight to secure it.
.,.. Continue raising the jack with the rod unt il the
wheel lifts off the ground slightly .
Position the vehicle jack
onl y under the designat­
ed lifting points on the si ll
Q fig. 178. There is ex­
actly
one Location for each wheel. The jack m ust
not be posit ioned at any other location
c:> ,& ¢CI).
So ft g round under the jack can cause the vehicle
to s lip off the jack . Always place the jack on firm
ground. Use a flat, stable support if necessary.
Use a non-s lip surface such as a rubber mat on a
slipper y surfa ce such as tile .
A WARNING
= -
-You or your passengers could be injured
while changing a wheel if you do not fo llow
t hese safety precautions:
- Position the vehicle jack on ly at the desig ­
nated lifting points and align the jack.
Otherwise, the vehicle jack could slip and
cause an injury if it does not have suffi­
c ient hold on the vehicle.
- A soft or unstable surface under the jack
may cause the vehicle to slip off the jack .
Always provide a firm base for the jack on
the ground.
If necessary, use a sturdy
board under the jack.
- On hard, slippery su rface (such as t iles)
use a rubber mat or simi lar to prevent the
ja ck from slipp ing.
- To help prevent injury to yourself and your
passengers:
- Do not raise the vehicle until you are sure
the jack is secure ly engaged.
- Passengers must not remain in the veh icle
when it is jacked up .
- Make sure that passengers wait in a safe
place away from the vehicle and we ll away
from the road and traffic.
- Make sure jack pos ition is correct, adjust
as necessary and then contin ue to raise
the jack .
229