2014 AUDI A5 COUPE check engine light

Do not fill coolant above the "MAX" mark. Ex­
cess coolant will be forced out through the pressure relief valve in the cap when the en­
gine becomes hot .
_& WARNING
-The cooling system is under pressure and
can get very hot. Reduce the risk of
scalding from hot coolant by following
these steps .
- Turn
off the engine and allow itto cool
down.
- Protect your face, hands and arms from escaping fluid and steam by covering
the cap with a large, thick rag.
- Turn the cap slowly and very carefully in a counter-clockwise direction while
applying light, downward pressure on
the top of the cap .
- To avoid being burned, do not spill an­
tifreeze or coolant on the exhaust sys­
tem or hot engine parts . Under certain
conditions, the ethylene glycol in en­
gine coolant can catch fire.
- Antifreeze is poisonous. Always store an­
tifreeze in its original container and well
out of the reach of children.
- If you drain the coolant, it must be
caught and safely stored in a proper con ­
tainer clearly marked "poison".
(D Note
- Do not add coolant if the expansion tank
is empty. Air could enter the cooling sys­
tem and damage the engine. If this is
the case, do not continue driving . Seek
professional assistance.
- Coolant pollutes the environment and
could cause an engine fire . Excess cool­
ant will be forced out through the pres­
sure relief valve in the cap when the en­
gine becomes hot.
- If, in an emergency, only water can be
added, the correct ratio between water
and antifreeze
¢ page 213 must be re­
stored as soon as possible.
Checking and filling 215
'
@) For the sake of the environment
Drained coolant should not be reused. Al­
ways dispose of used coolant while observ­
ing all environmental regulations.
Radiator fan
The radiator fan switches on automatically by
itself .
The radiator fan is driven by the engine via the
V-belt. The viscous clutch regulates the speed
of the fan according to the temperature of the coolant.
An auxiliary electric radiator fan* switches on
and
off depending on coolant temperature
and other vehicle operating conditions.
After you switch the engine
off, the auxiliary
fan can continue running for up to 10 minutes
- even with the ignition
off. It can even switch
on again later by itself ¢.&. , if
- the temperature of the engine coolant rises
du e to the h eat build-up from th e engin e in
the engine compartment, or
- the engine compartment heats up because
the vehicle is parked in intense sunlight.
_& WARNING ~
-To reduce the risk of personal injury nev-
er touch the radiator fan .
- The auxiliary electric fan is temperature
controlled and can switch on suddenly
even when the engine is not running.
- The auxiliary radiator fan switches on au­
tomatically when the engine coolant reaches a certain temperature and will
continue to run until the coolant temper­
ature drops. •
•

216 Checking and filling
Brake fluid
Checking brake fluid level
The brake fluid level can be checked with a
quick glance .
N N ~ N
" (X) (0
Fig. 165 Engine compartme nt: Cover on the brake flu ·
id reservo ir
Before you check anything in the engine com­
partment,
always read and heed all WARN·
INGS ¢ .&._ in Working in the engine compart­
ment on page 206 .
.. Read the brake fluid level from the brake
fluid reservoir ¢
fig. 165, ¢ page 208,
fig. 161.
The brake fluid level must be be ·
tween the "MIN" and
"MAX" markings.
The brake fluid reservoir is located at the rear
partition of the engine compartment on the
left side ¢
page 208 .
The fluid level may drop slightly after some
time due to the automatic adjustment of the
brake pads . This is not cause for alarm.
If the brake fluid level falls
considerably be­
low the "MIN" mark, the brake warning/indi­
cator light (U.S. models: ., Canadian mod­
els: .) will come on¢
page 15. Do not con­
tinue to operate the vehicle . The complete
brake system should be thoroughly checked
by an authorized Audi dealer or qualified
workshop and the cause corrected.
If the
brake fluid level is too low, the brake warning/
indicator light will illuminate. Contact an au­
thorized Audi dealer
immediately .
@ Tips
The brake fluid reservoir is located under­
neath the cover.
Changing brake fluid
Have the brake fluid changed by an experi­
enced technician .
Brake fluid absorbs moisture from the air. If
t he water content in the brake fluid is too
high, corrosion in the brake system may result
after a period of time . The boiling point of the
brake fluid will also decrease considerably and
decrease braking performance.
Therefore, the brake fluid must be changed
every two years . Always use new brake fluid
which conforms to Federal Motor Vehicle
Standard "FMVSS 116 DOT 4".
The brake fluid reservoir can be difficult to reach, therefore, we recommend that you
have the brake fluid changed by your author­
ized
Audi dealer. Your dealer has the correct
tools, the right brake fluid and the know-how
to do this for you .
A WARNING
- Brake fluid is poisonous. It must be stor­
ed only in the closed original container
out of the reach of children!
- Brake failure can result from old or inap­
propriate brake fluid. Observe these pre­
cautions:
- Use only brake fluid that meets SAE
specification
J 1703 and conforms to
Federal Motor Vehicle Standard 116.
Always check with your authorized Audi
dealer to make sure you are using the
correct brake fluid. The correct type of
brake fluid is also indicated on the
brake fluid reservoir.
- The brake fluid must be new. Heavy use
of the brakes can cause a vapor lock if
the brake fluid is left in the system too
long . This can seriously affect the effi­
ciency of the brakes as well as your
safety. This could result in an accident.
(D Note
Brake fluid will damage the paint of your
vehicle.

@ For the sake of the environment
Because of the pr oblem of proper d isposa 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
Under 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 dealer or qualified workshop . The elec­
trolyte leve l should also be checked each time
the battery is charged ¢
page 219.
Have the battery checked when you take your
ve hicle in for service . Yo u are well adv ised to
replace a battery that is older than 5 yea rs .
W ith certa in types of a irbag deployment, t he
b attery is d isconnected from the vehicle elec­
tr ica l system for safety reasons¢.&.
in Re ­
pair, care and disposal of the airbags on
page 150.
Disconnecting the battery terminals
Some vehicle functions (power w indow regu­
lators , for example) are lost if the battery ter­
m inals a re d isconnected. These func tions have
to be re lea rned after the batte ry term inals a re
connected agai n. T o prevent this , the bat tery
should only be d isconnec ted from the vehicle
e lec tric al system when absolu tely necessa ry
for repairs .
Vehicles not driven for long periods
If you do not drive you r vehicle over a period
of severa l days or weeks, elec trical compo­
nen ts are gr adually cut b ack o r swi tched off .
This redu ces energy cons umption and main­
tains starting capab ility over a longer per io d
¢ page 186.
Some o f the conven ience f unctions m ay not
ope rate, su ch as the in ter ior lig hts or t he
Checkin g and fillin g 217
power seat adjus tment. The convenience
funct io ns w ill be available again when yo u
turn o n the ign ition and start the engine.
Winter operation
D ur ing the w inte r mon ths, bat tery capa city
tends to dec rease as tempera tures drop . This
is beca use more power is a lso consumed wh ile
starting, and the headlights, rear window de­
fogge r, etc., are used more often.
Avoid unnecessary powe r consumpt ion, pa r­
ticular ly in city traffic or when traveling only
sho rt distances. Let yo ur authorized A udi
dealer check the capacity of the vehicle bat ­
tery before w inter sets in
¢ page 219. A well
charged battery will no t on ly prevent star tin g
problems w hen the weather is cold, but w ill
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
stored where it will not freeze . This will
p revent it from be ing damaged and having
to be repla ced .
Working on the battery
Be especially careful when working on or near
the bat tery.
The battery is located in the luggage compar t­
ment under the floor . B efo re you che ck any­
thi ng in the luggage compartment,
read and
heed all WARNINGS
¢ ,&. .
Always heed the safety warnings , when work­
i ng on the veh icle batte ry or t he vehicle e lec­
t rical 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· BO LS and safety precautions when working
on the battery .
®
Always wear eye protection.
•
•

218 Check ing and filling
&
Batter y acid contain s sulfuric acid . Al ·
wa ys wear glo ves and eye prote ction .
@
No
- spar ks
- flames
- smoking .
~
When a b attery i s ch arged , it p roduce s
h y d rogen ga s whi ch i s ex plosi ve and
c ould cau se per sonal inju ry.
®
Alwa ys keep the battery well out of
r ea ch of children .
A WARNING
Whenever working on the battery or on
the electrical system, there is the risk 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 part icles get on
your sk in or cloth ing . Sh ield your eyes .
Explosive gases can cause blindness or
other injury .
- Battery acid contains sulfur ic acid . Sulfu­
ric acid can cause blindness and severe
burns.
- Always wear gloves and eye protection.
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, immediately rinse with
cold water for severa l minutes and get
medical attention .
- 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 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 in jury.
-
- When a battery is charged, it produces
hydrogen 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 negat ive ground ca­
ble.
- Before performing any work on the e lec­
trica l system, switch off the engine and
ignit ion as well as any electrical equip­
ment. The negative cable on the battery
m ust be disconnected .
If you are just go­
ing to replace a light bulb, then it is
e nough to swi tc h off the lights.
- Before disconnecting the battery, switch
off the anti-theft alarm system! Other­
wise you wi ll set off the alarm.
- When disconnecting the battery, f irst
d isconnect the negat ive cab le and then
the posit ive c ab le.
- Before reconnecting the batte ry, ma ke
sure all e lectr ica l consumers are sw itch­
ed off . Re conne ct the pos it ive cab le first
and then the negative cable. Never inter ­
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 sure the vent hose is always attach­
ed to the opening on the s ide of the bat­
tery.
- Never use batteries which are damaged.
There is the danger of an explosion! Al­
ways rep lace a damaged battery.
A WARNING
Ca lifornia Proposition 65 Warning:
- Battery posts, terminals and related ac­
cessories conta in lead and lead com­
pounds, chem icals known to the State of
California to cause cancer and reproduc­
tive problems . Wash hands after han-
dling.
~

220 Check ing and filling
- To r educe the danger of explosion, never
co nnect or disconn ect cha rger cables
wh ile the c harger is operating.
- Fast char ging a battery is dangerous and
shou ld on ly be attempted by a compe­
tent technician w ith the proper equip­
ment .
- Battery acid that may spill d uring charg­
ing should be washed
off with a solution
of warm water and baking soda to neu ­
tralize the acid.
(Q) Note
Never use a fast charger as a booster to
start the engine . This will seriously dam­
age sensitive electronic components, such
as control units, relays, rad io, etc., as we ll
as the battery charger.
Battery replacement
The new battery must have the same specif/·
cations and dimensions as the original equip­
ment battery.
In tell igent energy management in your veh i­
cle is respons ible for d istributing the e lectr i­
cal energy throughout you r vehicle
~ page 186. The intell igen t energy m anage­
men t system w ill keep the engine ba tte ry
charged better then vehicles w ithout this sys­
tem . To make sure the additional e lectrica l en­
ergy is available once again after you have
changed the battery, we recommend that you install batteries o f the same type and ma nu­
facture only (the same as those installed at
the time your vehicle was delivered). Specifi­
cations are listed on the battery hous ing. You r
author ized Audi dealer must code the battery
in the ene rgy managemen t system to enable
you to use the ene rgy management functions
correctly after replac ing the battery.
I f it is not poss ible to use a battery of this
type, the new bat tery m ust h ave the s ame ca­
pac ity, voltage ( 12-volts), amperage, con ­
struction and plug sea ling. When installing the battery, make su
re the ig ­
nition and a ll electrical consumers are turned
off.
(D Note
Make sure the ventilat ion hose on the side
of the battery is connected, otherwise
fumes or battery acid can leak out .
@ For the sake of the environment
Because o f the p rob lem of p roper disposal
of a battery, we recommend your author ­
i zed Audi dealer change the battery fo r
you. Batteries contain sulfur ic acid and
l ead and must always be disposed of prop­
erly in comp liance with all environmental
regula tions. Dispos ing of veh icle batter ies
i mprope rly is very dange rous to the envi­
r o nment .
Windshield/headlight*
washer container
Fig. 167 En gin e compa rt m en t: Cove r on the w ind·
s h iel d a nd h eadligh t• was he r fl uid conta in er
.., N
-~ (X) a,
The washer fluid conta iner is marked w ith the
symbol
O on its cap~ fig. 167, ~ page 208,
fig .161.
.. Before yo u check any thing in the engine
compa rtment,
always read and heed all
WARNINGS q A in Working in the engine
compartment on page 206 .
.. Lift the fi ller cap tongue to add washer flu­
id. You can f ill the container to the top.
.. Press the cap back onto the filler neck after
fi lling the conta iner .
You can find the reservo ir
capacity in the table
in
q page 262. .,.

Emergency situations
General
This chapter is intended for trained emer­
gency crews and working personnel who have the necessary 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 can be started by
connecting it to the battery of another vehi­
cle.
If the engine should fail to start because of a
discharged or weak battery, the battery can be
connected to the battery of
another vehicle,
using a
pair of jumper cables to start the en­
gine.
Jumper cables
Use only jumper cables of sufficiently
largecross section to carry the starter current
safely. Refer to the manufacturer's specifica­
tions.
Use only jumper cables with
insulated termi­
nal 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
injury. Follow the instructions below for
safe handling of your vehicle's battery.
- Always shield your eyes and avoid lean­
ing over the battery whenever possible.
Emergency situations 255
-A discharged battery can freeze at tem­
peratures just below 32 °F (0 °C). Before
connecting a jumper cable, you must
thaw the frozen battery completely, oth­
erwise it could explode.
- 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 gas­
es. Keep sparks, flame and lighted ciga­
rettes 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 bat­
tery. Use of batteries of different voltage
or substantially different "Ah" rating
may cause an explosion and personal in­
jury.
- Never charge a frozen battery. Gas trap­
ped in the ice may cause an explosion.
- Never charge or use a battery that has
been frozen. The battery case may have
be weakened.
- Use of batteries of different voltage or
substantially different capacity (Ah) rat­
ing may cause an explosion and injury.
The ca pa city (Ah) of the booster battery
should not be lower than that of the dis­
charged battery.
- Before you check anything in the engine
compartment, always read and heed all
WARNINGS¢
page 206.
(D Note
- Applying a higher voltage booster bat­
tery will cause expensive damage to sen­
sitive electronic components, such as
control units, relays, radio, etc.
- There must be no electrical contact be­ tween the vehicles as otherwise current
could already start to flow as soon as the
positive(+) terminals are connected. ..,. •
•

270 Index
Automatic climate control Ai r vents ... ... . ...... ... .. .. .... .. 69
Operation . . . . . . . . . . . . . . . . . . . . . . . . . 68
Setup . .. ............... .. .. .... .. 70
Autom atic S hift Lock (ASL) . . . . . . . . . . . . 8 4
Automatic transmission . . . . . . . . . . . . . . . 82
Automatic Sh ift Lock (ASL) . . . . . . . . . . . 84
D riving .. ... ............ .. .. .. .. .. 84
E mergency mode . . . . . . . . . . . . . . . . . . . 8 8
E mergency release . . . . . . . . . . . . . . . . . . 89
K ick -dow n . . . . . . . . . . . . . . . . . . . . . . . . . 87
M anual s hift program ... .. .. .... .. . . 86
Remova l lock (ignition key) ... .. .... . . 71
Selector lever . . . . . . . . . . . . . . . . . . . . . . 83
Autom atic wi pers .......... .... .... .. 49
Auto Safety Hotline ............ .. ... 127
Average speed . . . . . . . . . . . . . . . . . . . . . . . 2S
Avoid damaging the vehicle .. .... .... . 188
B
Battery ... .. ...... ............ 17,217
B attery locat io n in side the luggage com-
pa rtment ................. .. .... . 217
C ha rging . ............... .. .. .... . 219
I mpor tan t war nings when wo rking on
the battery . . . . . . . . . . . . . . . . . . . . . . . 217
Jump starting .. .. ..... ... .. .. .... . 255
Low . .. .. .. ............. .. .. .. ... 186
Replacing the battery ..... .. .. .. .. . 220
State of charge . . . . . . . . . . . . . . . . . . . . 186
W inter operation . . . . . . . . . . . . . . . . . . 217
Wo rking on the battery . . . . . . . . . . . . . 217
Before driving .. ........... .. .. .... . 119
B io-e thanol ( Fue l) .......... .. .. .. .. . 202
Blended gasoline ... ... .. .. .. .. .. .. . 201
Blower (automatic climate control) . . . . . . 69
B ooste r seats ............. .. .. .. .. . 169
Brake fl uid
C hanging the brake fl uid ..... .. .... . 216
Check ing the brake fluid level ..... .. . 216
Reservoir .. .......... ...... ... .. . 216
What is the cor rect brake fl uid leve l? .. 2 16
What should I do if the bra ke flui d warn-
i ng light comes on? ....... .. .. .. .. . 216
Brake system .... ... .... ... .. .. .. .. . 216
Anti-lock braking system ....... .. .... 19
B rake ass ist system ..... .. .. .. .. .. . 180 B
rake fluid .... .. ... .. ..... ... .. .. 216
B rake fluid specifications for refill and re-
placement . ... .. ... .. ..... ... .. .. 216
Brake light defective ........... .... . 21
B rake power ass ist unit ......... .... 183
Brakes ....... ... .. .............. . 183
Ceram ic brakes ... ... .. .. ... ..... .. 183
El ectromechanical pa rking brak e ..... . 76
Wa rning/ind icator lights ...... .. .. .. . 15
Worn b rake pads symbo l ........ .. .. . 20
B rak ing
E mergency brak ing funct ion ... .. .. .. . 78
braking guard ..... ... .. ..... .... . .. . 90
Messages . .. .. .. .. ........... .... . 98
Settings .. .... .. ............. .... . 97
Break-in per iod .... .. ... ..... ... .. .. 188
T ires ... .. .... .. .. ... ..... ... .. .. 188
Bul bs .. .. .. .. .. .. .. .. ...... ... .. .. 253
C
Californ ia Proposition 65 Warn ing .... . 207
Battery specific .. ..... ........... . 218
Capacities .. .... .. ............. .... 262
Carbon p arts
Cleaning . . . . . . . . . . . . . . . . . . . . 198, 199
Care ........ ... .. .. ... ........... . 196
Cargo area
refer to Luggage compartment. . . 63, 125
Ca talyt ic co nve rter . . . . . . . . . . . . . . . . . . 189
Center armrest .. .. ................ .. 56
Central locking .... ... .. ..... .... . .. . 32
Central lock ing switch .......... .. .. . 36
Convenience key . . . . . . . . . . . . . . . . . . . . 36
Remote contro l key .............. .. . 35
Ceramic brake rotors New brake pads . ... .... .... ... .. .. 183
Ce rtifi cation .. .. .. ... .......... .. .. 267
Chang ing a f lat t ire . ............. .... 244
Chang ing a wheel . ... .... .... ... .. .. 244
Chang ing engine oil ..... .. ... ..... .. 212
Checking Engine coolant level . ........... .. .. 213
Checking t ire press ure . ... .... ... .. .. 228

Engine compartment
Safety instructions ................ . 206
Working the engine compartment 206
Engine coolant
Indicator light . . . . . . . . . . . . . . . . . . . . . 17
Engine coolant system .......... ... .. 213
Adding coolant .............. ... ... 214
Checking coolant level ..... .. .. .. .. . 213
Checking the engine coolant level . . . . . 213
Radiator fan ............. .. .. .. .. . 215
Engine coolant temperature Temperature gauge .......... .... ... 10
Engine hood Closing .. .. .. ........... .. .. .. ... 206
How to release the hood ... .. .. .. .. . 206
Engine oil ... ................ ... ... 208
Adding .... ................ ... ... 211
Additives . .. .. ........... .. .. .. ... 211
Changing .. ............. .... .. ... 212
Check oil level ........... .... .. ... 211
Consumption ............... ... ... 211
Indicator light . . . . . . . . . . . . . . . . . 17, 21
Oil consumption . ...... ... .. .. .. .. . 210
Oil grades ..................... ... 208
Pressure malfunction ...... .. .. .. .. .. 17
Sensor defective . . . . . . . . . . . . . . . . . . . . 21
Specification and viscosity ... ... .. .. . 208
Engine speed limitation .......... .... . 21
Environment Break-in period ........... .. .. .. ... 188
Catalytic converter ............ ... .. 189
Disposing of your vehicle battery ..... 220
Driving at high speeds .......... .... 190
Driving to minim ize pollution and noise 190
Fu el . .. .. .. .. .. ........... .. .. ... 204
Fu el economy ..................... 190
Leaks under your vehicle ............ 206
Letting the vehicle stand and warm up. 191
Proper disposal of drained brake fluid . 216
Proper disposal of drained engine cool-
ant . .... .. .. ............. .. .. ... 214
Proper disposal of drained engine
oil ...... ... ............. ... 211,212
Recycling used engine oil . .. .. .. .. .. . 211
Roof rack . . . . . . . . . . . . . . . . . . . . . . . . . 62
Unleaded fuel . ........... .. .. .. ... 201
What should I do with an old battery? . 220
Index 273
EPC
refer to Electronic power control . . . . . . 20
Ethyl alcohol (Fuel) . ................. 202
Event Data Recorder (EDR) ........ .... 180
Exhaust tail pipes Cleaning ... ..... .. ............... 197
Expansion tank .. .... ... ....... ..... 213
Exterior lighting . .. ................. . 43
Exterior m irrors
Adjusting ..... .... ................ 46
Dimming ... ..... .. ................ 47
Heating ........................... 46
F
Fan
Radiator
Fastening 215
Booster seats .. ...... ......... .... 169
Convertible child safety seats .... .... 168
Infant seats
Flat tire 167
Changi ng ... .. .. .. .. ........... .. 244
flexible fuel ... .. .... ............... 202
Floor mats ... ..... .. ............... 124
Fog lights/rear fog lig ht(s) . . . . . . . . . . . . . 43
Folding the rear seats ... ............. . 63
Foot pedals . .. .. .. .. ............... 124
For the sake of the environment Gasoline fumes and the environment .. 204
Letting the engine warm up . . . . . . 71, 74
Refueling . .. .. .. ................. 204
Saving fuel by early upsh ifting ... .. .. . 11
Front airbags Description . . . . . . . . . . . . . . . . . . . . . . . 141
How they work ... .. . .. .... ........ 146
Frontal collisions and the laws of physics 130
Front passenger's door emergency locking 37
Front seats Adjusting ....... .. ..... .......... 121
Child restraints in the front seat ...... 138
Fuel Additives .... .. ...... ............. 201
Blended gasoline ... . .. .... ........ 201
Consumption .. ... ............... .. 25
Filler neck . .. .. .... .......... ..... 203
Fuel gauge . . . . . . . . . . . . . . . . . . . . . . . . 12
•
•