2011 AUDI A5 CABRIOLET radiator

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& WARNING (co ntinued )
-Alway s use extreme caution to prevent clothing , jewelry , or
long hair from getting caught in the radiator fan, V-belts or
other moving parts, or from contacting hot parts. Tie back hair
before start ing , and do not wear clothing that will hang or
d roop into the engine.
• Minimize expo sure to emis sion and chemical hazards~& .
& WARNING
California Proposition 65 Warning:
• Engine exhaust, some of it s constituents, and certain vehicle
components contain or emit chemicals known to the State of Cali ­
fornia to cause can cer and birth defects and reproductive harm . In
addition, certain fluids contained in vehicles and ce rtain products
of component wear contain or emit chemicals known to the State
of California to cause cancer and birth defects or othe r reproduc­
tive harm.
• Battery posts, terminals and related accessories contain lead
and lead compounds, chemicals known to the State of California
to cause cancer and reproductive harms . Wash hands after
handling.
0 Note
When adding fluids , a lways make sure that they are poured into the
proper co nta iner o r filler opening, otherwise serio us damage to
vehicle systems will occur.
<£> For the sake of the environment
To detect leaks in time, inspect the vehicle floor pan from underneath
reg ula rly . If yo u see spot s from o il or o ther vehicle fluid s, have your
vehicle inspected by an authorized Aud i dea ler. •
Vehicle OP-eration
Engine compartment
These are the most i mportan t it ems that you can check.
Fig . 220 Typ ical layout for c ontainer s and engine oil filler cap
(D Jump start point( +) under a cover ........ .. .. .. .. . 293, 334
@ Brake fluid reservo ir ( ) . . . . . . . . . . . . . . . . . . . . . . . . 289
@ Engine oil f iller c ap
('1::r. ) . . . . . . . . . . . . . . . . . . . . . . . . 28 4
© Coolant ex pansion ta nk (-L ) . . . . . . . . . . . . . . . . . . . . . 28 7
© Jump start point( -) w ith he x head screw ..... ... .. . 293 , 33 4
© Winds hield/head light washer container (0 ) . . . . . . . . 295
(j) Power steering reservoir . . . . . . . . . . . . . . . . . . . . . . . . 246
Th e posi tion of the eng ine o il filling hole ~ fig. 220 (i tem @) can
differ depending on the eng ine des ign . ..,.
Vehicle care Do-it-yourselt service iTechnical data

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0 Note
• Before winter sets in, have the coolant checked to see if the
coolant additive in your vehicle is sufficient to meet the climate
conditions. This is especially important if you live in a region where
the winter is extremely cold. If necessary, increase the proportion of
coo lant additive to 60% .
• When adding coolant additive to your cooling system, remember:
-We recommend using only coolant additive G12++ (check the
label) for your vehicle. This coolant additive is available at autho­
r iz ed Audi dealers. Other types of antifreeze can s ignificantly
reduce corrosion protection. The resulting corrosion can cause a
loss of coolant and serious engine damage.
• Do not add any type of radiator leak sealant to your vehicle 's
eng ine coolant. Adding radiator repair fluid may adversely affect the
function and performance of your cooling system and could result in
damage not covered by your New Vehicle Limited Warranty. •
Checking the engine coolant level
The engine coolant level can be checked with a quick
glance.
Fig. 223 Engine
compartment: Coolant
expansion tank
Vehicle OP-eration
Before you check anything in the engine compartment,
always read and heed all WARNINGS=:> & in "Working in
the engine compartment" on
page 280.
-Turn off the ignition.
- Let the engine cool down .
- Place a thick rag over the coolant expansion tank
=:> fi.9. 223 and carefully twist the cap counter -clockwise
=> & .
- Read the engine coolant level in the open coolant expan­
sion tank=:> fig. 223. With a cold engine, the coolant level
should be between the "min" and "max" markings. When
the engine is warm, the level may be slightly above the
"max" marking.
The location of the coo lant expansion tank can be seen in the engine
compartment illustration =>
page 281.
To obtain an accurate reading, the engine must be sw itched off.
The expansion tank in your vehicle is equipped with an electric coolant level sensor.
When the coolant level is too low, the warn ing light in the Auto-Check
System =>
page 31 will blink until you add coolant and the level has
been restored to normal. Even though there is an electric coolant
level sensor, we st ill recommend you check the coolant leve l from
t ime to time .
Coolant loss
Coolant loss may indicate a leak in the cooling system . In the event of
coolant loss , the cooling system should be inspected immediately by
your authorized Aud i dealer . It is not enough merely to add coolant .
In a
sealed system, losses can occur only if the boiling point of the
coo lant is exceeded as a result of overheating . .,
Vehicle care Do-it-yourselt service iTechnical data

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in. WARNING
The cooling system is under pressure and can get very hot. Reduce
the ri sk of scalding from hot coolant by following the se steps .
• Tu rn off the engine and allow it to cool down .
• Protect your face, hands and arms from e scaping fluid and
steam by covering the cap with a large , thick rag.
• Turn the cap slowly and very c arefully in a counter-clockwise
direction while applying light , downward pressure on the top of
the cap.
• To avoid being burned, do not spill antifreeze or coolant on the
exhaust system or hot engine parts. Under certain conditions, the
ethylene glycol in engine coolant can catch fire.
0 Note
Do not add any type of radiator leak sealant to yo ur vehicle 's engine
coo lant. Adding radiator repair fluid may adverse ly affect the func­
tion and performance of your cooling system and could result in
damage no t c ove red by y our New Vehi cle Limited Warr anty. •
Adding coolant
Be very careful when adding engine coolant.
Before you check anyt hing in th e eng ine compartment ,
always read and heed all WARNINGS=> & in "Wor king i n
t h e e ngine compa rtment" on page
280.
-Tur n off the e ng ine.
- Let t he engi ne co ol d ow n.
- Place a t hick rag over the coolant expans ion tank
=> page 2 87, fig . 223 a nd carefully turn the ca p cou nte r­
clo ckwise
=> & .
- Add coo lant .
- Tw ist t he cap o n agai n
tightly.
Replacement eng ine coolant must conform to exact specificat ions
~ page 28 6, "Coolant" . Even in an emergency, if coolant a dditive
Gl2 ++, Gl2+ or Gl2 is not available, do not use a d ifferent add it ive.
Use plain water instead until you can get the correct additive a nd can
restore the co rrect ra tio. This s hould be done as soon as possib le.
If you have lost a considerable amount of coolant, then you shou ld
add co ld a ntifree ze and cold wa ter only when t he e ngine is cold.
Always use
new engine coo lant when refilling .
Do not fill coolant above the "M AX" mark. Excess coo lant wi ll be
for ced out through t he p ress ure relief va lve in t he cap w hen the
eng ine 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 it to cool down.
- Protect your face , hands and arms from escaping fluid and
s team by covering the cap with a large, thi ck rag.
- Turn the cap slowly and very carefully
in a counter-clockwise
direction while applying light , downward pre ssure on the top
of the cap.
- To avoid being burned, do not spill ant ifreeze or coolant on
the exhaust system or hot engine parts. Under certain condi­
tions, the ethylene glycol in engine coolant can catch fire .
• Antifreeze is poisonous. Always store antifreeze
in its original
container and well out of the reach of children .
• If you drain the coolant , it mu st be caught and safely stored in
a proper container clearly marked "poison ".
~

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0 Note
• Coolan t poll utes the environment and co uld cause an engine fire.
Excess coolant w ill be forced out throug h the pressure relief valve in
t he cap w hen the eng ine becomes ho t.
• If, i n an emer gency, only water can be adde d, the correct ratio
between wate r an d an tifree ze=>
page 28 6 must be restored as soon
as possib le.
<£> For the sake of the environment
Dra ined coolant should not be reused. A lways dispose of used coolant
w hile observ ing a ll enviro nmental regula tions. •
Radiator fan
The r adia tor fan switc hes on au tomatic ally by its elf .
Th e radiator fan is dr iven by the e ngine vi a the V-bel t. Th e v iscous
clutch regu lates the speed of the fan accord ing to the temperature of
th e co olan t.
An auxiliary e lectr ic rad iator fan* sw itches on a nd off depend ing o n
coo la nt temperat ure and other vehicle ope rating conditions .
After you sw itch t he engi ne off, the a uxiliary f an can con tinue r unning
for up to 10 minutes -even w ith the ignition off . It can even switch on
a g ain lat er by itse lf=> &, if
• the temperature of the e ngine coola nt rises due to the heat build ­
up from the eng ine in the engi ne compa rtment, o r
• the engine compartment heats up because the vehicle is parked in
intense s unlight .
& WARNING
• To reduce the risk of personal injury never touch the radiator
fan.
Vehicle OP-eration
& WARNING (continued )
• The auxiliary ele ctric fan is temperature controlled and can
switch on suddenly even when the engine is not running.
• The auxiliary radiator fan switches on automatically 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 flu id level ca n be chec ked wit h a quick gl an ce.
Fig . 224 Engi ne
c ompartm ent : Brake
fluid re se rvoir
B efo re you check anyth ing i n the e ngine compartment ,
always read and heed all WARNINGS~ & in " Workin g in
t h e e ng in e co mpartme nt" on
p age 280.
- Rea d the b rak e fl uid le ve l f ro m t he brak e fluid re serv oir
~ f ig. 224. The br ak e fl uid le vel mus t be be tw ee n the
" M IN " an d "MAX " m ar kin gs.
Th e br ake fl uid re se rvoir is loca ted at th e rear pa rt iti on of the engine
compartment on the left side=>
page 281. .,_
Vehicle care Do-it-yourselt service iTechnical data

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• oil changes, and
• cl eaning or re placing t he air fi lter.
W For the sake of the environment
By reg ula rly m ainta ini ng yo ur vehicl e, you h elp ma ke sure th at emis­
sion standards are ma inta ined, thus mi nimizi ng adve rse effects o n
t he environmen t.•
Important considerations for you and your
vehicle
T he i ncreasing use of e lec tronics, soph is tica ted f uel inject io n a nd
em ission cont rol systems, and the gene rally increasing tec hnica l
c o m plex ity of to d ay' s automob iles, have ste adily re duced the s cope
of ma intenance and repairs wh ich can be carr ied o ut by vehicle
ow ne rs.
Also, safety and environmental co ncerns p lace very st ric t
limits o n the nature of re pairs and adjust ments to engi ne and trans­
mission parts which an owner c an per form .
Ma int ena nce, ad justments and repairs us ually r equire sp ecial tools,
test ing devices an d other e quipme nt available to s pec ia lly trai ne d
wo rks ho p pe rsonn el in order to assure p roper perfor mance, rel i­
ability and safety of the vehicle and its many systems.
Impro per m aintenan ce, a djustments an d repair s can im pair the ope r­
ation and reliability of your vehicle and even void your vehicle
wa rranty . Therefo re, proo f of se rvicing in accordan ce wi th the ma in ­
t enance schedule may be a condi tion fo r upholding a possib le
wa rranty cla im made w it hi n the wa rra nty period .
Above all, operat io nal safety can be adversely affected, crea ting
unnecessary risks for you and your passe nge rs.
I f i n do ub t abou t any se rvi cing, have it done by you r authorized Audi
dealer or a ny other pro perly eq uipped and qualified wo rkshop . We
st rong ly ur ge yo u to give you r a uth orized Aud i dea ler the opportun ity
t o pe rfor m all scheduled mainte nance a nd necessary repairs. Yo ur dea
ler has t he facilit ies , original parts a nd trai ned spec ia lists to keep
you r vehicle ru n ning pr operly.
Performing limited maintenance yourself
The follow ing pages des cribe a lim ited nu mber of pro ce dur es which
can be perfo rmed on your vehicle wit h ord ina ry tools, s houl d the need
a ris e a nd tra ined p erson ne l b e unavailable. Before perfo rm ing any o f
these procedures, always thorough ly r ead a ll of the applicab le text
a nd caref ully follow the ins truc tion s given. A lw ays r igoro usly o bserve
t he
WARNINGS prov ided .
Before you check anything in the engine compartment, always read
and heed all WARNINGS=>
& and=> & in "W orkin g in t he engine
compartment" on
page 280.
& WARNING
• Serious personal injury may occur as a result of improperly
performed maintenance, adjustments or repairs.
• Always be extremely careful when working on the vehicle.
Always follow commonly accepted safety practices and general
common sense . Never risk personal injury .
• Do not attempt any of the maintenance, checks or repairs
described on the following pages if you are not fully familiar with
these or other procedures with respect to the vehicle, or are uncer­
tain how to proceed.
• Do not do any work without the proper tools and equipment.
Have the necessary work done by your authorized Audi dealer or
another properly equipped and qualified workshop.
• The engine compartment of any motor vehicle is a potentially
hazardous area . Never reach into the area around or touch the
radiator fan. It is temperature controlled and can switch on
suddenly -even when the engine is off and the ignition key has
been removed . The radiator fan switches on automatically when
the coolant reaches a certain temperature and will continue to run until the coolant temperature drops. _,,,

___ A_l_,_ p _ h_ a _ b_e _ t_ i_c __ a _l _i_n :...::d __ e::..: x:...::...,_ _________________________________________ _
Emergency locking of the doors .. .. ....
47
Emergency operation
Luggage compartment lid .... ... .. .
48
Power top ... .. .. .. ... ... .... .... 57
Emergency release
Sele ctor lever ...................
154
Emergency starting .. .. ............. 333
Emergency towing ..... .. .. ..... .... 336
Emergency u nlocking
Ignition key .. ................. ...
40
Energy management .............. .. 247
Battery power ................ ... 249
Dr iver not ification ......... .... ... 249
Engine
Compartment .. .. ... . .. ... ... . ..
281
Coolant ................ .. .... .. 286
Hood .................. ...... .. 279
Starting ... ............. ...... ..
106
Starting w ith jumper cables ........ 333
Stopping .. .. ... .... ........ .... 1 07
Engine compartment
Safety instructions .. ... ... .... . ..
280
Work ing the eng ine compartment 280
Engine coo lant system
Ma lf u nct ion . . . . . . . . . . . . . . . . . . . . . .
31
Radiator fan ... .... .. . ... ... .. .. 289
Engine coo lant tempe rature
T empera ture gauge ............ .. .. 8
Engine cooling system ...............
286
Adding coolant ... .. .. .. ... ...... 288
Checking coo lant level . ........... 287
Checking the engine coolant level ... 287
Engine data ....... .. ... . .. ... ... ... 342
Engine hood
Closing ............... ... .......
280
How to re lease the hood ........... 279
Engine oil .... ..... ... ... ... .. .. .. . 282
Add ing ......................... 284
Add itives ....................... 284
Changing ............ .... .. ..... 285
Check o il level ....... ... .. .. .. .. . 284
Consumption ............. ....... 284
Oi l co nsumption ............... .. 283
Oi l grades ...................... 282
Specification and viscosity .. .. .. .. . 2 82
Engine oil leve l .. . .. ............... .. 36
Engine oil p ressure
Ma lf u nction . . . . . . . . . . . . . . . . . . . . . .
31
Engine oil se nsor defec tive . .. .. ... .... 36
Engine speed limitatio n ............... 36
Environmen t
B reak -in period .. .... .. .. ... .... .
250
Catalytic converter .... ... ... .. .. . 251
Disposing of your vehicle battery ... . 29 4
Driv ing at high speeds ............ 253
Driv ing to minimi ze po llution and noise ..
252
Fuel ... ............... .. .. .. .. . 27 6
Fuel e co nomy ............ .. .... . 252
Leaks unde r yo ur vehicle .. ... ..... . 280
Letting the vehicle stand and wa rm up . ..
253
Prope r disposa l of dra ined bra ke fluid 290
Pro per disposal of dra ined engine coo la nt
288
Proper disposal of dra ined engine oil 284,
2 85
Recycl ing used eng ine o il ... .. .... . 284
Unleaded fue l ................... 274
What should I do w it h an old battery?
294
Environmental note
Rear window defogger ........ .
92, 100
EPC
See Electronic power contro l . . . . . . . . 13
ES P
See Electronic stabilization program (ESP)
240
Event Data Recorder ( EDR) 240
Exhaust ta il pipes
Cleaning ... .... .... .. .. ...... ..
267
Expans ion tank ..... ................ 28 7
F
Fan ..................... .... ... 9 1, 98
Rad iator ................. ... .... 289
Fastening
Booster seats ...................
229
Convertible child safety seats ...... 228
Infant seats ...... ............... 227
Flat tire
Changing ................. .... ..
320
Floo r mats ............ .. .. .. .. .. .. 182
Fog lights .. ... ........ ...... .. . ... . 64
Folding the rear seat backrests . ... .. .. . 8 4
Foot pedals ................... ... .. 182

___ A_ l_. p_ h _ a_b_ e_ t_ic _a_ l_ in_ d_e _ x ____________________________________________ _
Power locking switch ... .. ..... ... .... 46
Powe r locking system ............ ... . 41
Emergency locking ............ .... 47
Locking and unlocking the vehicle from inside ...... .. .... .. .. .. .. .. .. . 46
Rear lid/trunk lid .... .. .. .......... 47
Selective unlock feature .. .......... 43
Settings ..................... ... . 43
Unlocking and locking vehicle ....... 43
Power locks
W indows open and closed .......... 49
Power steering . . . . . . . . . . . . . . 13, 34, 246
Power top . . . . . . . . . . . . . . . . . . . . . . . . . . S 1
Care and cleaning ................ 263
Closing .................. .... ... . 53
Convenience opening/closing . ....... 54
E mergency operation .. .. .......... 57
Error message ................. ... 52
General information .............. . 51
Indicator light ................ .... 52
Malfunct ion .. ... ......... .... .... 52
Opening ........ ........ .... .. .. . 53
Var iable power top storage bay ... .. . 55
Wind deflector . .. .. .. .. .......... 55
Power window regulators Convenience opening/closing .. ...... 49
Malfunctions ................. .... SO
Power window switches ............... 48
Pregnant women Spe cial considerat ions when wearing a
safety belt ............. ...... .. 195
Programming the Homelink ® universa l re­
mote control . . . . . . . . . . . . . . . . . . . 171 Proper occupant seating positions
.. ... 178
Proper safety belt position .......... . 195
Proper seating position Front passenger ............... .. 179
Occupants .. ............. .. .... . 178
Rear passengers 180
Q
Quartz clock ............ .. .. .. .. .. .. 10
Question What happens to u nbelted occupants? .. .
191
Why safety belts? .......... ..... . 189
R
Radiator fan ....................... 289
Rain sensor ....... ...... .. .. .. .. .. .. 69
Rain sensor defective .... .. ........... 35
Read ing lights ... ................ ... 68
Rear .................... .. ... ... 69
Rear fog lights . .. ........... ...... .. 64
Rear lid Escape handle .. .. .. .. .. .... .. ... 318
Opening and closingi ............. .. 47
Rear light Defective .................. .... .. 35
Rear window defogger ........ .. .. 92, 100
Rear-view camera Parking mode 2 ....... .... .. .... . 168
Parking mode 1 .............. .... 167 Rearview mirror
See Mirrors
.. .. .. ................ 72
Recirculation mode ..... ... .. ..... 91, 99
Red symbols ............ ... .. .. ..... 29
Refill engine oil . .. .. .. .... .......... 32
Refuelling .... ............... .. .. .. 276
Release lever for hood .. .... ... .. .. .. 279
Remote control garage door opener (Homelink ®) .......... ........ 171
Remote control key Unlocking and locking ............. 43
Remote rear lid release ............... 47
Repair manuals . .. ................ . 343
Repairs Airbag system ............. .... .. 213
Replacing a fuse .............. .... .. 328
Replacing bulbs . .. .. .. ............. 332
Replacing tires and wheels .... ....... 308
Replacing windshield wiper blades .. .... 71
Reporting Safety Defects . .. .. .. .. 185, 186
Reset b utton . . . . . . . . . . . . . . . . . . . . . . . . 11
Retractor .. .... .... .. .. .. .. ... .. .. 194
Rims Cast alloy ....................... 266
Rollbar
See Active rollover protect ion system 186
s
SAFE ................... .. .. .... .. . 11
Safe driving habits .............. .. .. 176