2011 AUDI A5 CABRIOLET radiator cap

& WARNING (continued)
first under hard braking. Rear wheel lock-up can cause loss of
vehicle control and an accident. Have your vehicle repaired imme­ diately by your authorized Audi dealer or a qualified workshop.
Drive slowly and avoid sudden, hard brake applications. •
Engine cooling system malfunction -•-
A malfunction in the engine cooling system must be repaired as soon as possible.
If the - t-symbol flashes in the display, either the engine
coolant
temperature is too high or the engine coolant level is
too low. A driver message appears as well to explain the
malfunction in more detail. The driver warning goes out after
about 5 seconds, but it can be brought up at any time by
pressing the
[SET] button again.
Switch off engine and check coolant level
- Pull off the road.
- Stop the vehicle.
- Turn off the engine .
- Check coolant level==>
page 287.
- Add coolant if necessary ==> page 288.
- Continue driving only after the engine coolant
warning/indicator light goes out.
- Contact your authorized Audi dealer for assistance if
necessary .
If the engine coolant level is correct, then the radiator fan may be the
cause of the malfunction.
Controls and equip ­
ment Safety first
Driver information display
& WARNING
•
If your vehicle should break down for mechanical or other
reasons, park at a safe distance from moving traffic, turn off the
engine and turn on the hazard warning lights=>
page 67, "Emer­
gency flashers
A".
• Never open the hood if you see or hear steam or coolant
escaping from the engine compartment· you risk being scalded.
Wait until you can no longer see or hear steam or coolant
escaping.
• The engine compartment of any vehicle is a dangerous area.
Before you perform any work in the engine compartment, turn of
the engine and allow it to cool. Follow the warning stickers
=> page 2 72, "Engine compartment".
0 Note
Do not continue driving if the-~- symbol illuminates. There is a
malfunction in the engine cooling system -you could damage your
engine. •
Engine oil pressure malfunction The red engine oil pressure warning symbol requires
immediate service or repair. Driving with a low oil pres­
sure indication is likely to cause severe engine damage.
If the 'l=:7: symbol on the display flashes, the engine oil pres­
sure is too low. A driver message appears as well to explain
the malfunction in more detail. The driver warning goes out
after about 5 seconds, but it can be brought up at any time by
pressing the
[SET] button again.
Switch off engine! Oil pressure too low
-Stop the vehicle.
Vehicle care Technical data

-Checking and filling
-------=------=---------------------------------------------------
Closing the engine hood
-Pull the hood down until the pressure from the struts is
reduced.
- Let the hood
drop down and latch in place . Do not try to
push it shut;
it may fail to engage=> &.
& WARNING
A hood that is not completely latched could fly up and block your
view while driving.
• When you close the engine hood, check it to make sure the
safety catch has properly engaged. The hood should be flush with
the surrounding vehicle body parts.
• If you notice while driving that the hood is not secured prop­
erly, stop at once and close it. •
Working in the engine compartment
Be especially careful whenever you work in the engine
compartment.
Whenever you must perform any work in the engine compartment,
for example checking and filling different fluids, there is a risk of
injury, burns and accidents. To prevent personal injury always
observe the following WARNINGS. The engine compartment of any
vehicle is a hazardous area
=> & .
& WARNING
To help avoid injury, before you check anything under the hood :
• Turn off the engine.
• Remove the ignition key.
• Apply the parking brake.
& WARNING (continued)
• Move selector lever of automatic transmission to "P" (Park).
• Always let the engine cool down. Hot components will burn
skin on contact.
• To reduce the risk of being burned, never open the hood if you
see or hear steam or coolant escaping from the engine compart­
ment. Wait until no steam or coolant can be seen or heard before
carefully opening the hood.
• Keep children away from the engine compartment.
• Never spill fluids on hot engine components. They can cause a
fire.
• Never touch the radiator fan. The auxiliary electric fan is
temperature controlled and can switch on suddenly.
• Never open the coolant reservoir cap when the engine is still
warm. The coolant system is pressurized and hot coolant could
spray out.
• Protect your face, hands and arm from steam or hot engine
coolant by placing a thick rag over the cap when you open the
coolant reservoir.
• If work on the fuel system or the electrical system is necessary:
-Always disconnect the battery.
- Never smoke or work near heaters or open flames. Fluids in
the engine compartment could start a fire.
- Keep an approved fire extinguisher immediately available.
• To avoid electrical shock and personal injury while the engine is
running or being started, never touch: -Ignition cables
- Other components of the high voltage electronic ignition system.
• If you must perform a check or repair with the engine running: -First, fully apply the parking brake, move selector lever of
automatic transmission to "P" (Park). ..,

_____________________________________________ C_h _ e_ c_ k_in --= g'-- a_n _d_ f_i _ll _i_n -=g ::;__ ____.1111
& 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

___ C_ h_ e_c _k _i _ n _g ~ a_n _d_ f_il _l_in _ g _________________________________________ _
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 ".
~

___________________________________________ C_;_ h _.:. e_c _k _ i_n -=g ~ a_n _ d_ f_i _ll _i _ n -=g '--.......J-
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

___ 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