2012 AUDI A5 COUPE check engine light

-Always wear eye protection. Do not let
battery acid or any lead particles get on
your skin or clothing. Shield your eyes .
Explosive gases can cause blindness or
other injury.
- Battery acid contains sulfuric acid . Sulfu­
ric acid can cause blindness and severe
burns.
- Always wear gloves and eye protection.
Do not tilt the battery because acid
could leak out of the ventilation open­
ings.
- If you get battery acid in your eyes or
on your skin, immediately rinse with
cold water for several 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 cables .
= 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,
which could lead to damage or explosion and personal injury.
- 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 negative ground ca­ ble .
- Before performing any work on the elec­
trical system, switch off the engine and
ignition as well as any electrical equip ­
ment. The negative cable on the battery
must be disconnected . If you are just go­
ing 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! Other­
wise you will set off the alarm.
Checking and filling 249
-When disconnecting the battery, first
disconnect the negative cable and then
the positive cable.
- Before reconnecting the battery, make
sure all electrical consumers are switch­
ed off. Reconnect the positive cable first
and then the negative cable . Never inter ­
change the cables -this could start a fire!
- Never charge a frozen or a thawed-out
battery . It could explode! 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 side of the bat­
tery .
- Never use batteries which are damaged.
There is the danger of an explosion! Al­
ways replace a damaged battery.
&_ WARNING
California Proposition 65 Warning:
- Battery posts, terminals and related ac­
cessories contain lead and lead com­
pounds, chemicals known to the State of
California to cause cancer and reproduc­
tive problems. Wash hands after han­ dling.
(D Note
- Do not disconnect the vehicle battery
when the ignition is switched on or when the engine is running, otherwise, you will
damage electronic components in the
electrical system.
- If your vehicle is going to stand for a
long period of time without being driven,
protect the battery from "freezing", oth­
erwise it will be damaged and will then
have to be replaced.
•
•

CD 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, radio, etc., as well
as the battery charger.
Battery replacement
The new battery must have the same specifi­
cations and dimensions as the original equip­
ment battery.
Intelligent energy management in your vehi­
cle is responsible for distributing the electri­
cal energy throughout your vehicle
c::, page 211. The intelligent energy manage­
ment system w ill keep the engine battery
charged bette r then ve hicles w ithout this sys­
tem. To ma ke sure t he addi tional e lectrical en­
ergy is available once again after you have
changed the battery, we recommend that you
install batteries of the same type and man u­
facture only (the same as those installed at
the time your vehicle was delivered). Specifi­
cations are listed on the battery housing. Your
author ized Audi dealer must code the battery
i n the energy management system to enable
you to use the energy management functions
correctly after replac ing the bat tery .
If it is not possible to use a battery of this
type, the new battery must have the same ca­ pac ity, voltage (12 volts), amperage, con­
s truction and pl ug seal ing .
When insta lli ng the battery, make sure the ig ­
ni tion and all e lectr ica l cons umers are turned
off.
(0 Note
Ma ke sure the venti lation hose on the s ide
of the battery is connected, othe rwis e
fumes or battery ac id can leak out.
@ For the sake of the environment
Because of the problem of proper d isposa l
of a batte ry, we recommend your author­
ize d Au di dealer change th e batte ry for
Checkin g and fillin g 251
you. Batteries contain sul fur ic acid and
l ead and must always be disposed of prop­
erly in comp liance with a ll environmental
regulations. Disposing of vehicle batter ies
i mproperly is very dange rous to the envi­
r o nment .
Windshield/headlight*
washer container
Fig . 20 9 En gin e compa rtm ent : W inds hield an d head ­
light• washer fluid co ntai ne r
The was her fluid conta iner is mar ked w ith the
symbol Won its cap.
.., Before you check any thing in the engine
compa rtment,
alwa ys read and heed all
WARNINGS ~ .&_ in Working in the engine
compartment on page 23
7.
.., Lift the fi lle r ca p tongue to add washer flu ­
id. You can fi ll the containe r to t he top .
.., Press the cap back onto t he fi ller neck after
filling the container.
You can find the reservo ir
capacity in the table
in
c::> page 292.
Clean water should be used when filling up. If
poss ible, use soft wa ter to prevent scaling on
the washer jets . Always ad d a glass cleaner
solution (with frost protection in the winter) .
CD Note
Do not mix engine coola nt antifree ze o r
any other additives to fill up t he wind­
sh ield washer reservoir .

A WARNING ,~ -
You or your passengers could be injured
while changing a wheel if you do not fol­
low these safety precautions:
- If you have a flat tire, move a safe dis­
tance off the road. Turn off the engine,
turn the emergency flashers on and use
other warning devices to alert other mo­
torists.
- Make sure that passengers wait in a safe
place away from the vehicle and well
away from the road and traffic.
- To help prevent the vehicle from moving
suddenly and possibly slipping off the
jack, always fully set the parking brake
and block the wheel diagonally opposite
the wheel being changed with the fold­
ing chocks or other objects. When one
front wheel is lifted off the ground, plac­
ing the Automatic Transmission in "P"
(Park) will
not prevent the vehicle from
moving .
- Before you change a wheel, be sure the
ground is level and firm. If necessary,
use a sturdy board under the jack.
- After installing the inflatable spare tire,
make sure that you replace the flat tire/
wheel in its storage area properly and
tighten the knurled retaining screw se­
curely.
0 Note
If you are changing the wheel on a steep
incline, use a rock or similar object to
block the opposite wheel to prevent the
vehicle from moving.
(D Tips
Obey all laws.
Changing a wheel
When you change a wheel, follow these ­
quence described below step-by-step and in
exactly that order .
1. Remove the decorative wheel cover* or
the
wheel bolt caps* . For more details see
What do I do now? 275
also ~ page 2 76, Decorative wheel cov­
ers
or ¢ page 2 76, Wheels with wheel
bolt caps.
2. Loosen the wheel bolts ¢ page 276.
3. Locate the proper mounting point for the
jack and align the jack below that point
¢page 277 .
4.
Lift the car with the jack ¢ page 2 77.
5. Remove the
wheel with the flat tire and
then install the
spare tire ¢page 278.
6. Tighten all wheel bolts lightly.
7.
Lower the vehicle with the jack.
8. Use the wheel bolt wrench and
firmly
tighten all wheel bolts in a crisscross pat­
tern ¢
page 2 76.
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
277 and ¢page 279.
After changing a wheel
A wheel change is not complete without the
doing the following.
"' Store and secure the wheel you replaced in
the spare wheel well.
"' Replace the tools and the jack in their prop­
er location.
"' Check the
tire pressure of the spare tire as
soon as possible.
"' As soon as possible, have the
tightening
torques
on all wheel bolts checked with a
torque wrench. The correct tightening tor­
que is 90 ft lbs. (120 Nm).
"' Have the flat tire
replaced as soon as possi­
ble.
(D Tips
- If you notice that the wheel bolts are
corroded and difficult to turn while
changing a tire, they should be replaced
before you check the tightening torque .
- Drive at reduced speed until you have the
tightening torques checked. •
•

284 Emergency situations
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
Q;) 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
large cross section to carry the starter current
safely. Refer to the manufacturer's specifica­
ti ons.
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. -
A discharged battery can freeze at tem­
peratures just below
32 °F (0 °(). 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 capacity (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 230, Engine com­
partment.
@ 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. ..,.

300 Index
Car ca re ... ... .. .. ..... ... .. .. .... . 221
Int erior .... ... . ...... ... .. .. .... . 226
Plastic and v inyl ... .... ... .. .. .... . 224
Ca re of exte rior ... .. ... .. .. .. .. .. .. . 22 1
Cargo area
refer to Luggage compartment 44, 68 , 150
Cargo net .... ... . ...... ... .. .. .... .. 69
Cata lytic conve rter ......... .. .. .... . 214
Center armrest
Adjusting .. ................ ... ... .
68
Storage compartment . . . . . . . . . . . . . . . 68
Certification ... .. ...... ... .. .. .... . 296
Changing a fla t tire ......... .. .. .... . 274
Changing a wheel .......... .. .. .... . 274
Changing engine oi l
Chass is 2 4 3
Unde rcoat ing .......... .. .. .. .. .. . 226
Checking
Eng ine coolant leve l ........ ... .. .. .
244
Checking tire pressure . ... .. .. .... .. . 258
C hi ld restra ints
D anger of using c hild restra ints in the
front sea t .... ............. .. .... .
163
Where can I ge t addit iona l info rmation
about child restra ints and their use? ..
203
C hi ld restra int system anchors . .. .. .. . 199
C hi ld safety ............... .. .. .... . 186
Convertible locking retractor .. .. ..... 195
Important safety instructions fo r us ing
ch ild safety seats .. ....... .. .. .. .. .
189
Important things to know wh en dr iving
wi th child ren ............ .. .. .... .
186
Ins tall ing a chi ld res traint using the
L A TC H sys tem .. .. ..... ... .. .. .... .
200
Lowe r ancho rages ..... ... .. .. .... . 200
Mounti ng and releasing the ancho rage
hook .. .. ................. .. .... .
200
Tether anchors ........... .. .. .... . 201
Tethe r straps . ... ..... ... .... .. .. . 201
C hild safety seats ....... ... .. .. .... . 191
Booste r seats .. .. ..... ... .. .. .... . 194
Conve rtible chi ld seats .... .. .. .. .. . 192
Convertible locking retractor .. .. .. .. . 195
Danger of us ing c hild restra ints in the
front seat .. ................ ... .. .
163
H ow do I properly install a child safety
seat in my vehicle? ........ .. .. .. .. .
189
Infant seats ..... ... .. ..... .... . .. 191
Installing ..... .. .. ... ..... ... .. .. 195
LA TCH system . ... ... .. ..... ... .. .. 200
Safety instr uctions ............. .... 189
C igarette ligh ter . . . . . . . . . . . . . . . . . . . . . 76
Cleaning
Alcanta ra ® (synthetic suede) .........
229
Engine co mpartment ......... .. .. .. 2 30
Exhaus t ta il pipes . ............. .... 22 6
Fabr ics and fab ric coverings ... .. .. .. 22 7
Instr ument pane l ... ... ..... ... .. ..
2 27
In terior ... .... .. .. .... .... ... .. .. 226
Leather ... .... .. ... .. ..... .... . .. 229
MMI control console ........... .. .. 226
MMI display ... .. ............. .... 226
Plastic and vinyl .. ..... ........... . 224
Plastic parts . .. .. ..... ........... . 22 7
Safe ty be lts ..... ................ .
230
Trim strips .. .. .. ... .......... .. .. 22 4
Cleaning and protection .......... .. .. 221
Clock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Coat hooks ... .. .. .. ... .. ... ..... .. . 77
Co ld tire inflation pressure ........ .. ..
256
Compac t spa re tire . ............. .. .. 2 73
also refer to Spare ti re ............ .. 2 73
Compass mirror . . . . . . . . . . . . . . . . . . . . . 59
Compliance ..... .. .. ... ..... ... .. .. 296
Cons umer Informa tion . . . . . . . . . . 1 52, 293
Contacting NHTSA . ............... .. 152
Co nvenience closed . . . . . . . . . . . . . . . . . . 4 6
Co nvenience key . . . . . . . . . . . . . . . . . . . . . 42
START E NGIN E STOP butto n . . . . . . 94 , 96
Star ting eng ine .. ............. .. .. . 94
Swi tch ing eng ine off ........... .... . 96
Switching on ignition . .. ..... ... .. .. . 94
U nlocking and locking vehicle . ... .. .. . 42
Co nvenience openi ng ............ .... . 46
Convertib le child safety seats ..... .... 192
Co nvertib le locking retractor
Activati ng ..... .. .. ... ..... ... .. ..
197
Deactivating ..... ... .. ..... ... .. .. 198
Using to secure a child sa fety seat l.95, 197
Coolant system .. .. ............. .. .. 2 4 4
Cooling System
Expans ion tank . .. .......... ...... .
244
Cornering light . . . . . . . . . . . . . . . . . . . . . . 52

302 Index
Efficiency program . . . . . . . . . . . . . . . . . . . 24
Fuel economy messages . . . . . . . . . . . . . 26
Memory leve ls . . . . . . . . . . . . . . . . . . . . . 23
Other equipment . . . . . . . . . . . . . . . . . . . 25
Shift indicator . . . . . . . . . . . . . . . . . . . . . 25
Electrical seat adjustment
refer to Seat adjustment ........... . . 63
E lectromechan ical park ing brake
E mergency braking . . . . . . . . . . . . . . . . . 98
Malfunction . . . . . . . . . . . . . . . . . . . . . . . 99
Operation . . . . . . . . . . . . . . . . . . . . . . . . . 96
Parking .... ................ ..... .. 97
Releasing and closing ............. . . 96
Starting assist ........... .. .. .. .. .. 98
Starting from rest .......... .. .... .. 98
Starting off with a trailer . . . . . . . . . . . . . 98
Warning/ indicator lights .... ..... .. .. 17
Electronic differential lock (EDL) How the system works ....... .. .... . 205
Warning/indicator lights ... .. .. .. .. . . 16
Electronic immobilizer . . . . . . . . . . . . . . . . 39
Electronic power control
(EPC) warn ing/ indicator light ... .. .. . . 15
Electronic stabili zation program (ESP)
How the sys tem works ....... .. .. .. . 204
Warning/indicator lights ....... .. .. .. 15
Emergency braking . . . . . . . . . . . . . . . . . . . 98
E mergency flasher . . . . . . . . . . . . . . . . . . . 52
Warn ing/ indicator lights ..... .. .. .. . . 16
Emergency key . . . . . . . . . . . . . . . . . . . . . . 3 7
Start ing engine ........... ... .. ... . 39
Emergency locking of the doors ..... .. .. 44
E mergency release
Selector lever ............ .. .. .... . 132
E mergency starting ......... ... .. .. . 284
Emergency towing .......... ... .... . 286
E mergency unlocking
I gnition key ........... .. .. .. .. .. .. 39
Energy management ..... .. .... .. .. . 211
Battery power ............... .. ... 212
Driver notification . ......... .. .. .. . 212
E ngine
Compartment . ........... .. .. .... . 239
Coolant .. .. ............... .. .... . 244
H ood .. .. .. ................ ... .. . 237
Starting ... ... .... ...... .. .. .. .. .. 92 Starting
with jumper cables ....... .. 284
Stopping . ..... .. .. .............. .. 94
Engine compartment Safety instructions ............. .. .. 23 7
Working the engine compartment .... 237
Engine coolant system ............ ... 244
Adding coolant . .. ................ . 245
Checking coolant level ............ .. 244
Checking the engine coolant level ..... 244
Malfunction . . . . . . . . . . . . . . . . . . . . . . . 31
Radiator fan ..... ................ . 246
Engine coolant temperature
T emperature gauge . ........... .. .. . 10
Engine data . .... .. ............. .... 292
Engine hood
Closing . . . . . . . . . . . . . . . . . . . . . . . . . . 23 7
How to release the hood . . . . . . . . . . . . 23 7
Engine oil ...... .. ............. .... 239
Adding . .. .. .. .. ............. .. .. 242
Additives . ... .. .. .. .............. . 242
Changing ..... .. .. .............. . 243
Check oil level ... ............. .... 242
Consumption .. .. ............. .. .. 242
Oil consumption .. ... .......... .. .. 241
Oil grades . .... ................... 239
Specification and viscosity ........ ... 239
Engine oil level .... ................ .. 36
Engine oil pressure
Malfunction . . . . . . . . . . . . . . . . . . . . . . . 31
Engine oil sensor defective . . . . . . . . . . . . 36
Engine speed limitation . . . . . . . . . . . . . . . 36
Environment Break-in period . .. ............. .... 213
Catalytic converter ............. .... 214
Disposing of your vehicle battery ..... 251
Driving at high speeds .............. 215
Driving to minimize pollution and noise 215
Fuel .. .. .. .. .. .. ............. .. .. 234
Fuel economy .. .. ... .......... .. .. 215
Leaks under your vehicle .......... .. 23 7
Letting the vehicle stand and warm up. 216
Proper d isposal of drained brake fluid . 247
Proper disposal of drained engine cool-
ant .. .. .. .... .. ............. .... 245
Proper disposal of drained engine
oi l . . . . . . . . . . . . . . . . . . . . . . . . . 242, 243
Recycling used engine oil ............ 242