2013 AUDI A4 coolant temperature

228 Check ing and filling
scalding from hot coolant by following
these steps .
- Turn off the eng ine and allow it to cool
down.
- Protect your face, hands and arms from escaping flu id and steam by cover ing
the cap with a large, thick rag .
- Turn the cap slowly and very carefully
i n a counter-clockwise direction while
apply ing l ight, downwa rd press ure on
the top of the cap .
- To avo id being burned, do not spi ll an­
tifreeze or coolant on the exhaust sys­
tem or hot engine parts . Under certain
conditions, the ethylene glyco l in en­
gine coolant can catch f ire .
- Antifreeze is poisonous . Always store an­
tifreeze in its or iginal container and we ll
out of the reach of children.
- If you drain the coolant, it must be
caught and safely stored in a proper con­
tainer clear ly marked "poison".
@ Note
- Coolant po llutes the env ironment and
could cause an engine fire . Excess coo l­
ant will be forced out through the pres­
sure re lief 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
c::> page 226 must be re­
stored as soon as possible .
@ For the sake of the environment
Drained coolant should not be re used. Al­
ways dispose of used coolant while observ­
ing all environmental regulat ions .
Radiator fan
The radiator fan switches on automatically by
itself
T he radiator fan is driven by the engine via the
V-be lt . The viscous clutch regulates the speed
of the fan accord ing to the temperature of the
coolant. An a
uxiliary electric radiator fan* switches on
and off depend ing on coolant temperature
and other vehicle operat ing condit ions .
After yo u sw itch the engine off, the aux iliary
f an can continue running for up to 10 minutes
- eve n wit h the ignit ion off. It can even switc h
on again later by itself
c::> &. , if
- t he tempe rature of the engine coo lant rises
due to the heat build -up from the engine in
the engine compartment, or
- the engine compa rtment heats up because
the vehicle is parked in i ntense sunlight.
_& WARNING
- To reduce the risk of personal injury nev­
er touch the radiator fan.
- The auxiliary electric fan is temperat ure
controlled and can sw itch on suddenly
even when the engine is not running.
- The a uxiliary radiator fan sw itches on au­
tomatically when the engine coo lant
reaches a certai n temperature and will
continue to run until the coolant temper­
ature drops .
Brake fluid
Checking brake fluid level
The brake fluid level can be checked with a
quick glance.
F ig . 1 88 Engin e compart men t: Cover on the b rak e flu­
i d reservo ir
Before you check a nyth ing in the engine com­
partment,
always read and hee d all WARN ­
INGS c::> .&. in Working in the engine compart-
ment on page 219 . .,..

-Never mount used tires on yo ur vehicle if
yo u are not sure of their "previous histo­
ry." Old used tires may have been dam­
aged even though the damage cannot be
seen that can lead to sudden tire failure
and loss of vehicle control.
- If you notice unusual vibration or if the
vehicle pulls to one side when d riving, al­
ways stop as soon as it is safe to do so
and check the wheels and tires for dam­
age .
(D Note
Please note that summe r and wi nte r tires
are designed for the cond itions that are
Glossary of tire and loading terminology
Accessory weight means the comb ined weight (in excess of
those sta ndard items which may be rep laced)
of au toma tic transmission, power steer ing ,
power brakes, power windows, power seats,
radio, and heater, to the extent that these
items are availab le as factory-installed equip­
ment (whether installed or not) .
Aspect ratio
means the rat io o f the height to the w idth of
the tire in percent . Numbers of 55 or lower in ­
dicate a low sidewall for improved steering re­
sponse and better overa ll handling on dry
pavement .
Bead
means the part of the t ire t hat is made o f
steel wires, wrapped or reinforced by ply cords
and that is shaped to fit the r im.
Bead separation
means a b reakdown of the bond between
components in the bead .
Cord means the strands forming the plies in the
tire.
Tire s an d wheel s 235
typica l in those seasons . Aud i recommends
using winter tires during the winter
months . Low temperatures signif icant ly
dec rease the e lasticity of summer t ires,
which affects tract ion and brak ing ability.
If summer t ires are used i n very co ld tem ­
peratures, cracks ca n form o n the tread
bars , res ulting in perma nen t tire damage
that can cause loud driving noise and un­
bala nced ti re s. Audi i s not respon sible for
th is type of damage .
Cold tire inflation pressure
means the t ire p ress ure recommended by t he
vehicle manufacture r fo r a tire o f a des ignated
s ize t hat has not bee n driven for more than a
coup le o f miles (k ilometers) at low speeds in
the three hour period before the tire press ure
is m easured or adjusted.
Curb weight
me ans the we ight of a motor ve hicle with
st andard equipmen t incl ud ing the max imum
capacity of fuel, oi l, and coolant, air condi ­
tioning and additional weig ht of optiona l
equipment.
Extra load tire
means a t ire design to oper ate a t higher load s
and at higher inflation pressures than the cor­
responding standa rd tire . Extra load tires may
be identified as "XL", "x l", "EXTRA LOAD", o r
"RF" on the sidewal l.
Gross Axle Weight Rating ("GAWR")
me ans the load-ca rry ing capac ity of a single
axle system , measured at the tire -ground in­
te rfaces.
Gross Vehicle Weight Rating ( "GVWR ")
mea ns the maximum total loaded we ight of
the ve hicl e. .,..
•
•

A
Accessories . . . . . . . . . . . . . . . . . . . . 64, 282
AC (automatic climate control) ... .. .. .. 77
adaptive cruise control
Vehicles with manual transmission .. .
101
Adaptive cruise control ...... .. .. .. .. .. 99
C leaning sensors/camera ... ... .. .. . 205
Messages .. ................ ... ... 107
Request for driver intervention . . . . . . . 105
Setting the driving program .. .. .. .. . 104
Adaptive dampers .......... .. .. .. .. . 113
Adaptive light ................ ... ... . 47
Adaptive Light (defective) ......... .. .. 22
Adding
Engine coolant ........... .. .. .. ...
227
Engine oil .. ................ ... ... 224
Windshield washer fluid ......... .. . 233
Additional accessories
Additives 282
Engine oil .. ............. .... .. .. . 224
Adjustable steering column ... ... .. .. .. 80
Adjusting
Air distribution (automatic climate con-
trol) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
78
Instrument illumination ... .. .. .. .. .. 50
Steering column .................... 80
Temperature (automatic climate control) 78
Airbag
Warning/indicator lights ... .. .. .. .. ..
20
Airbag system . . . . . . . . . . . . . . . . . 145, 162
Advanced Airbag System ....... ... .. 149
Advanced Airbag System components . 152
Care ... ... . .... ... ..... ..... .. ... 158
Children . .. ............. .... .. .. . 167
Child restraints ........... .. .. .. ... 168
Components (front airbags) . ... .. .. . 152
Danger of fitting a child safety seat on
the front passenger seat . . . . . . . . . . . .
146
Disposal . .. .. ........... .. .. .. ... 158
Front airbags . . . . . . . . . . . . . . . . 149, 150
How do the front airbags work? . . . . . . 154
How many airbags does my vehicle
have? ... ... ............. ...... ..
152
How the Advanced Airbag System com-
ponents work together .... .. .. .. .. .
153
Important things to know .. .. .. .. .. . 145 Index 285
Indicator light
..... ............... 156
Monitoring . ... .... ............... 156
PASSENGER AIR BAG OFF light ....... 156
Repairs ... .. .. .. ................. 158
Safety instructions ................. 158
Side airbags ..... .. ............... 160
Side curtain airbags .. .... .. .... .... 163
Weight-sensing mat ............... 167
When must the system be inspected? . 156
all-wheel drive .. .. ................. 191
Alloy wheels .. .... .. ............... 208
All wheel drive
Winter tires . .. .. .... ........... ..
250
Alternator
refer to Generator . . . . . . . . . . . . . . . . . . 17
Anti-freeze
refer to Engine coolant system ....... 226
Anti-lock braking system ............. 185
Warning/ind icator lights ........ .. .. . 19
Anti-slip regulation .. ... ....... .... . 185
Anti-theft alarm warning system ........ 32
Anti-theft systems
Electronic immobilizer .............. .
38
Armrest ...... .. .. ................. . 60
Ashtray . . . . . . . . . . . . . . . . . . . . . . . . . . . .
63
Asterisk
What does it mean when something is marked with an asterisk? . . . . . . . . . . . . . .
6
Audi braking guard
refer to braking guard ............. .. 99
Audi drive select ..... ............... 113
Adaptive dampers ................. 113
Description .. .. ...... ............. 113
Dynamic steering . ... ... .... ... .. .. 113
Setting the driving mode ............ 114
Sport differential . .. .. .. ...... .... . 113
Audi Service Repair Manuals and Litera-
ture
280
AUTO Automatic climate control .......... ..
78
Automatic headlights ............... 47
Auto Lock . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Automatic belt retractor ......... .... 140
Automatic car wash
refer to Washing ... .............. . 203
•
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-----------------------------~I~ n~d~ e~x 289
Emergency operation
Emergency braking function (parking
brake) ... .. .. .. ........ ... .. .. .. .. 87
E me rgency sta rting ........ .. .. .. .. . 269
Emergency towing .. .... .... . .. .. .. . 271
Energy management .... ... .. .. .. .. . 192
Battery power . . . . . . . . . . . . . . . . . . . . . 1 7
Driver notification . . . . . . . . . . . . . . . . . . 17
E ng ine
Compartment ..... .... ... .. .. .. ... 221
Coolant .... .. ... ..... ... .. .. .. ... 226
Hood . ..... .. .. ... . .... ... .. .. ... 219
Starting . . . . . . . . . . . . . . . . . . . . . . 80, 83
Start ing with jumper cables .. .. .. .. . 269
Stopping . . . . . . . . . . . . . . . . . . . . . . 82, 84
Eng ine compartment
Safety instructions ..... ... .. .. .. .. . 2 19
Working the engine compartment 219
E ng ine coolan t
I ndicator light . . . . . . . . . . . . . . . . . . . . . 18
E ng ine coolant system .......... ... .. 226
Adding coolant .............. ... ... 227
Chec kin g coolant leve l ..... .. .. .. .. . 226
Checking the eng ine coolan t leve l .. .. . 226
Ra diato r fan ............. .... .. ... 228
E ng ine coolant temperature
Temperatu re ga uge .... ...... .... ... 10
Eng ine data .. ............. .... .. ... 277
E ng ine hood
C losing . . . . . . . . . . . . . . . . . . . . . . . . . . 219
How to release the hood ... .. .. .. .. . 2 19
E ng ine oi l .. ................. ... ... 221
Adding .. .. ............. .. .. .. .. . 224
Addi tives . .. ............. .... .. ... 224
Changing .. ... .. ..... ... .. .. .. ... 225
Check oil leve l .. .. .... ... .. .. .. ... 224
Consumption ..... .... ... .. .. .. ... 224
Indicator light ........... .... .. 17,21
O il consumption .......... .. .. .. .. . 223
O il grades .. ............. .... .. ... 221
O il level symbol ............. .... ... 21
Pressu re malfunction ...... .. .. .. .. .. 17
Sensor defective . . . . . . . . . . . . . . . . . . . . 2 1
Specification and vis cos ity .. .. .. .. .. . 22 1
Eng ine speed limitat io n ..... .. .. .. .. .. 21 Environment
Break-in period ..... . ... ...... ... .. 194
Catalytic converter . .. .. ..... ... .. .. 195
Dispos ing of your ve hicle battery ... .. 233
Driving at high speeds .............. 196
Driving to minimize po llution and noise 196
Fuel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 217
Fuel economy .. .. .. ..... ......... .
Lea ks unde r you r vehicle ........ ... .
Let ting the vehicle stand and warm up .
Proper disposal of d rained brake flu id .
Proper disposal of drained engine cool ­
ant
. ... .. .. .. .... . ... ...... ... ..
Proper disposal of drained eng ine 196
2 19
196
229
227
o il . . . . . . . . . . . . . . . . . . . . . . . . . 224, 22S
Recycling used engine oil ............ 224
Roof rack . . . . . . . . . . . . . . . . . . . . . . . . . 68
Un leaded fuel .. .. .. . .. .... .... .. .. 214
What shou ld I do with an o ld battery? . 233
EPC
refer to Electron ic power control . . . . . . 20
ESC ( Electronic Stabi lization Contro l)
Warning/indicator lights ..... ... .. .. . 19
E thy l alco ho l (Fuel) . ............. .. .. 215
Event Data Recorder (EDR) .......... .. 185
E xhaust tai l pipes
Cleaning . ... .... .. . .. .. ..... ... .. 209
Expansion tank
Exterior lighting
E xterior m irrors 226
. .. ............... .. . 47
Adjusting . . . . . . . . . . . . . . . . . . . . . . . . . SO
D' . 1mming .. .. .... .. . .. .. ..... ... .. . 51
Heating ... .. .. .. .. .. .. .. .... ... .. . SO
F
Fan
Radiator
Fasten ing
B oos ter sea ts 228
17 4
Convertib le child sa fe ty seats .... .. .. 173
Infant seats . . . . . . . . . . . . . . . . . . . . . . 172
Fasten ing eyes
refer to Tie-downs .... ........... .. . 72
Flat tire Chang ing . .. .. .. .. . .. ....... ... .. 259
flexib le fue l
Floor
. .. .... .. . .. .. ..... ... .. 215
75
•
•

290 Index
Floor mats ........ ......... ... .... . 132
Fog lights/rear fog light(s) ..... .. .. .. . . 47
Folding the rear seats . . . . . . . . . . . . . . . . . 69
F oot pedals ....................... . 132
For the sake of the environment Gasoline fumes and the environment .. 217
L ett ing the engine warm up . . . . . . 80, 83
Refueling ............... .. .. .... . 217
Saving fue l by early upshift ing .. ...... 11
Front airbags Descr ipt ion .... .... ...... .. .. .. .. . 149
H ow they work . . . . . . . . . . . . . . . . . . . . 154
Frontal collisions and the laws of physics 138
Fr ont passenger's door emergency locking 38
Front seats Adjusting .. ..... ........... ... .. . 129
Ch ild restraints in the front seat . .. .. . 146
Fuel Additives . ... ............ .. .. .. .. . 214
Blended gasoline ............. .. ... 214
Consumpt ion . . . . . . . . . . . . . . . . . . . . . . 25
Filler neck .. ... . ...... ... .. .. .. .. . 216
Fu el gauge ... ........... .. .. .... .. 12
Gasoline . ... ............ .. .. .. .. . 214
Gasoline additives ................ . 216
Low fuel level symbol . . . . . . . . . . . . . . . 21
Octane rating .................... . 214
Recommendation ........... .. .... . 214
Refuelling .... ........... .. .. .... . 217
Reserve .. ... ... .... ..... .. .. .. .. .. 12
Tank capacity ............. ... .. ... 277
Tank system .......... .... ... .. .. .. 21
Un lock ing the fuel fi ller flap by hand .. 218
Fuel economy messages (efficiency pro-
gram) . .. .. .. ... .. ..... ... .... .. .. .. 29
Fuel filler flap
Unlocking the fuel filler flap by hand .. 218
Fuses Assignment . . . . . . . . . . . . . 265, 266, 267
Replacing . ................. ..... . 265
G
Garage door opener (HomeL ink) .. .. ... 123
Garment hooks . . . . . . . . . . . . . . . . . . . . . . 66
Gas discharge lamps ......... ... .... . 268 Gauges
Engine coolant temperature . . . . . . . . . . 10
Fuel gauge . . . . . . . . . . . . . . . . . . . . . . . . 12
Tachometer . . . . . . . . . . . . . . . . . . . . . . . 11
Gear recommendation . . . . . . . . . . . . . . . . 28
Gearshift indicator ...... ........... .. 27
Gearshift lever
6-speed manual transmission .... .... . 91
General illustration
Instruments and controls ....... .... .. 8
Generator Warning/ind icator lights ........... .. 17
G lossary of tire and loading terminology 235
G love compartment . . . . . . . . . . . . . . . . . . 65
Valet parking .... ................ .. 45
GPS controlled clock ................ .. 12
Gross Vehicle Weight Rating (GVWR) . .. 275
Ground clearance .. ... .......... .... 198
H
Headlights
Cleaning system . . . . . . . . . . . . . . . . . . . . 53
Defective . . . . . . . . . . . . . . . . . . . . . . . . . 21
Headlight range control ............. 22
Left hand drive, right hand drive .. .. .. . 49
Travel mode . . . . . . . . . . . . . . . . . . . . . . . 49
Headlight washer reservoir ..... .. .... 233
Head restraints .. .. ............. .... 131
Adjusting . . . . . . . . . . . . . . . . . . . . 61, 131
Removing/installing .............. .. 61
Heated exterior mirrors . . . . . . . . . . . . . . . . . . . . SO
rear window . . . . . . . . . . . . . . . . . . . . . . . 78
seats .... ... .. .. .. ...... ....... .. . 78
windshield washer spray nozzles . . . . . . 53
Heating ... ..... .. .. .............. .. 76
Heavy clothing and safety be lts ...... .. 140
High beam .. .... ... ................ . 48
High voltage warning label ........ ... 275
Hill descent control ................ .. 95
Homelink (remote control)
Hood 123
Opening . ..... .. ................ . 219
Re lease lever .... ............. .... 219
Hooks ... .. .. .. .. ............... .. . 72
Horn ...... .. .. .. .. ............... .. 8