2011 AUDI A5 COUPE coolant temperature

Checking and filling Ill
-------------~--
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.
Safety first
& WARNING (continued)
• Move selector lever of automatic transmission to "P" (Park);
put manual transmission in Neutral.
• 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: ..,
Vehicle care Technical data

•--=C:.:.h.:.. e=. c=.:..:: k .:.:in ..:. g ~ a::..:..: n~d .:...:.. f:....:il ..:.li :.:.n.;.: g~ ------------------------------------------
0 Note
• Coolant pollutes the environment and could cause an engine fire.
Excess coolant will be forced out through the pressure relief valve in
the cap when the engine becomes hot .
• If, in an emergency, only water can be added, the correct ratio
between water a nd antifreeze ::::>
page 281 must be restored as soon
as possible.
ci> For the sake of the environment
Drained coolant should not be reused. Always dispose of used coolant
wh ile observ ing all environmental regulations.•
Radiator fan
The radiator fan switches on automatically by itself.
The radiator fan is driven by the engine v ia the V-belt. The viscous
clutch regulates the speed of the fan according to the temperature of
t he coo lant.
An auxiliary electr ic radiator fan* sw itches on and off depending on
coolant temperature and other vehicle operating conditions.
After you switch the engine off, the auxiliary fan can cont inue running
for up to 10 minutes- even with the ignition off. It can even switch on
again later by itse lf::::>
/1 , if
• the temperature of the engine coolant rises due to the heat build­
up from the engine in the engine compartment, or
• the engine compartment heats up because the veh icle is parked in
intense sunlight.
& WARNING
• To reduce the risk of personal injury never touch the radiator
fan.
/1 WARNING (continued)
• 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 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 fluid level can be checked with a quick glance.
Fig . 209 Engine
co mpartm ent : Brake
fluid reservoir
Before you check anything in the engine compartment,
always read and heed all WARNINGS=> & in "Working in
the engine compartment" on
page 275.
-Read the brake fluid level from the brake fluid reservoir
=> fig. 209. The brake fluid level must be between the
"MIN" and "MAX" markings.
The brake fluid reservoir is located at the rear partition of the engine
compartment on the left side=>
page 276. .,

______________________________________________ C _o_ n _ s_u_ m_ e_r_ I_n _f_ o_ r_m _ a_t_ i_ o _ n __ _
• oil cha nges, and
• cl ea ning or re placing th e air fi lter.
W For the sake of the environment
By regu larly ma intaini ng yo ur vehicl e, y ou h elp m ake su re th at em is­
sion standards a re mainta ined, t hus mi nimizing adverse effects o n
t he enviro nmen t. •
Important considerations for you and your
vehicle
Th e increas ing use of elect ronics, s ophistica ted fuel inje ct io n and
em ission cont rol systems, and t he generally increasing tec hnical
c omplex ity o f today' s automobile s, have s tea dil y re duced t he s cope
of maintena nce and repairs w hic h can be carr ied out by ve hicle
ow ners.
Also, safety and environmental c o nce rn s plac e very s trict
limits o n the nature of repa irs and adjustments to engine an d tra ns­
mission parts w hich an owner can pe rform .
M ain te nance, ad justm ents and r epairs us ua lly re quir e spec ia l t ools,
test ing devices an d other e quipment availab le to s pecia lly trained
wo rksh op pe rsonnel in order to assure pro per perfor mance, re li­
ability and safety of the vehicle and its many systems.
Impro per ma inte nance, adjustments and rep airs can im pa ir the ope r­
ation and reliability of your ve hicle and even void your veh icle
wa rranty . Therefo re, p ro of of se rvicing in a ccordance wi th t he ma in ­
t enance sch edul e may be a co nd it io n fo r u phold ing a possib le
wa rranty claim made w it h in the wa rranty pe riod.
Above all, operat io nal safety ca n be adve rsely affec ted, c reat ing
unnecessary r is ks for you and your passe ngers.
If in doubt abou t any serv ic ing, have it done by your authorized Audi
dealer or a ny o ther pro perly equipped a nd qualified workshop . W e
st rong ly ur ge you to give yo ur auth oriz e d Aud i dea ler the opportu nity
t o pe rform all sc heduled mainte na nce and necessary repairs. Yo ur
Safety first
dealer has the facilities, o rigina l parts and trained spec ia lists to keep
your vehi cle runni ng properly.
Performing limited maintenance yourself
The foll ow ing page s descr ibe a lim ite d num ber of proced ures whi ch
can be perfo rmed on your vehicle w it h ordina ry tools, shou ld the need
ar ise and tr ained pe rsonnel be u navailabl e. Befo re pe rforming any of
t hese p rocedures, always t horoughly read all of the applicable text
and ca ref ull y follow the ins tru ction s given . Alw ays rigoro 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 orking in the engine
compartment" on
page 275.
& 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. ..
Do-it,yourself service Technical data

___ A_ l_. p_ h _ a_b_ e_ t_ic _a_ l_ in_ d_e _ x ____________________________________________ _
Parking ........ ..... .. .. .... ... 117 Hood .. .. .. .. .. .... ... . ... .. .. . 274
Releasing and clos ing .. .. ......... 116 Starting ........... .. .. .. ....... 112
Starting assist ................ ... 117 Sta rting with jumpe rr cab les ........ 328
Starting from rest . .. ...... ..... .. 117 Stopp ing ... .. ..... .... .. .. .. .. . 113
Sta rting off w ith a t railer ... . .. .. .. 118
Engine compartment
W arning/ind icator lights . .......... 18
Safety instruct ions .... .. .. .. .. ... 275
Elect ronic differential lock (EDL) Working the eng ine compartment . . 275
How the system works .... ... .. ... 238
Engine coo lant system . .. ... . ... .... . 281
Warning/ind icator lights . .......... 17
Adding coolant ... .... .. . .. ... .. . 283
Electronic immobilizer .. .. . ... ... .. ... 45
Checking coo la nt level . ..... ..... . 282
Electro nic powe r contro l Checking the engine coo
lant level . .. 282
( E PC) war ning/ indicato r light .. ...... 15 Ma
lfunction ... ................. .. 34
Electronic stabilization program (ESP) Radiator fan ...
...... .. .. .. .. ... 284
How the system works ............ 236 Engine coo
lant temperature
Wa rning/ind icator lights . .......... 15 T
emperat ure gauge . .... . ... .. .. . . 10
Emergency braking ..... .. .. .. .. .. ... 118 Engine data
... ... ...... ... .. .. .. .. . 339
Emergency flasher . . . . . . . . . . . . . . . . . . . 62
Engine hood
W arning/ind icator lights ... .. ... ... 16 Closing ........
...... ...... ..... 275
E mergency key .. ................ .... 42 How to re
lease the hood .......... . 2 7 4
Starting eng ine . .. .... .. ..... ..... 45 Engine oil
.... ..... ..... .... .. .. .. . 277
Emergency locking of the doors . ... .. .. 51 Adding ...
... .... .... .... ... . ... 279
Eme rgency release
Sele ctor leve r ............. .... .. 156 Add
itives ...... .. .. .. ...... .. ... 279
Changing ............ .... .. ..... 280
E mergency starting .. .. ... ....... ... 328
Emergency towing ..... .. .. ..... .... 331
Emergency u nlocking
Ignition key .. .... ............. ... 44
Energy management .......... .... .. 243
Battery power ................... 245
Dr iver not ification ..... .. .. ... .. .. 245 Check o
il level ............ .. .... . 279
Consumption ....... .. .. .. ....... 279
Oil consumption .... .... . ... .. .. . 278
Oi l grades .. ..... ............. .. 277
Specification and viscosity .. .. .. .. . 277
E ngine oil leve l ... .... ............. .. 40
E ngine oil pressure
M al fun ctio n ... ........... ...... .. 35
Engine
Compartment .. .. .. .. . ... ... .. .. 276
Coolant ...... .......... ...... .. 281 Engine oil sensor defec
tive ..... .. .. ... 40
Engine speed limitatiorn . ....... ..... .. 40 Environment
Break-in per iod ......... ... .. .. .. 246
Catalytic converte r ............... 24 7
Disposing of you r vehicl e battery .. .. 289
Dr iv ing at hig h speeds ............ 249
Dr iv ing to mi nimize poll ution and noise ..
248
Fuel .. .. .... ............. ...... 271
Fuel economy .. .... .... ... .. .. .. 248
Leaks under you r vehicle ... .. ... .. 275
Lett ing the vehicle stand and warm up ...
249
Proper disposa l of dra ined brake fluid 285
Proper disposal of d ra ined engine coo lant
283
Proper disposal of drained engine oil 279,
280
Recycl ing used e ng ine o il ... .. .. .. . 279
Unleaded fue l ............ ... .. .. 269
What should I do w it h an old batte ry?
289
E nvironmen tal note
Re ar w indow defogger ...... .. 100, 1 06
Roo f rack . . . . . . . . . . . . . . . . . . . . . . . . 90
EPC See Elect ronic power con tro l ........ 15
ESP See Electronic stabilization program (ESP)
15
Event Data Recorde r (EDR) 236
Exhaust tai l pipes
Cleaning ... .... ... .. . .... .... .. 263
E xp ans ion tank .. .. .. .. ............. 282
Eyeglasses compartment ......... . ... . 94