2009 AUDI Q7 radiator

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•
- Read the engine coolant level in the open coolant expan­
sion tank :::::>
page 338, fig. 287. 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 coolant expansion tank can be seen in the
engine compartment illustration~
page 332.
To obtain an accurate reading, the engine must be switched off.
The expansion tank in your vehicle is equipped with an electric
coolant level sensor.
When the coolant level is too low, the warning light in the Auto­
Check System~
page 33will blink until you add coolant and the
level has been restored to normal. Even though there is an electric
coolant level sensor, we still recommend you check the coolant level
from time 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 immedi­
ately by your authorized Audi dealer . It is not enough merely to add
coolant.
In a
sealed system, losses can occur only if the boiling point of the
coolant is exceeded as a result of overheating.
& 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
steam by covering the cap with a large, thick rag.
& WARNING (continued)
• Turn the cap slowly and very carefully 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 your vehicle's engine
coolant. Adding radiator repair fluid may adversely affect the func ­
tion and performance of your cooling system and could result in
damage not covered by your New Vehicle Limited Warranty. •
Adding coolant
Be very careful when adding engine coolant.
Before you check anything in the engine compartment,
always read and heed all WARNINGS:::::> & in "Working in
the engine compartment" on
page 331.
- Turn off the engine.
Let the engine cool down.
Place a thick rag over the coolant expansion tank
=:> page 338, fig. 287 and carefully twist the cap counter­
clockwise :::::>& .
Add coolant.
- Twist the cap on again
tightly.
Replacement engine coolant must conform to exact specifications
~ page 337, "Coolant". Even in an emergency, if coolant additive .,,
Vehicle care I t •

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G12+ +, G12 + or G12 is not available, do not use a different addit ive .
Use p lain water ins tead until you ca n get the c orrec t additive and
can restore the correct ratio . This should be done as soon as
poss ible.
If you have los t a considerable amount o f coo lant, then you s hould
add co ld antifreeze and cold water only when the engine is cold .
A lways us e
new en gi ne c oolant when refi llin g .
Do not fi ll coo lant above the "MAX" mark. Excess coolant wil l be
forced out through the pressure relief valve in the cap when the
engine beco mes hot.
& WARNING
• The cooling sy stem is under pressure and can get very hot .
Reduce the risk of s calding 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
steam by covering the cap with a large, thick rag .
- Turn the cap slowly and very carefully in a counter -clockwise
dire ction 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 condi ­
tions , the ethylene glycol in engine coolant can catch fire.
• Antifreeze is po isonous . Always store antifreeze in its original
container and well out of the reach of children.
• If you drain the coolant , it must be caught and safely stored in
a proper container clearly marked "poison ".
0 Note
• Coo lant po llutes t he e nviro nment and cou ld cause a n en gin e
fire. Excess coolant wi ll be forced out through the pressure re lief
va lve in the cap when the eng ine becomes hot.
• I f, in an emergency, on ly wate r can be added, the correct ratio
between wate r and ant ifree ze::::>
page 337 must be restored as soon
as possib le .
W For the sake of the environment
Drained coolant should not be reused. Always dispose of used
coo la nt whi le observ ing all env iro nmen tal reg ulat io n s. •
Radiator fan
The radiato r fan switches on au toma tic ally by i tself.
The radiator fa n is dr iven by the eng ine via th e V -belt. The visco us
clutch regulates the speed of the fan according to the temperature
o f t he coo la nt.
An auxiliary electric radiator fan * sw itches on and off depending on
coo la nt t empe rat ure a nd othe r vehic le operating c ondi tio ns.
A ft er you sw itch the e ngine o ff, the au xiliary fa n ca n conti nue
running for up to 10 m inutes- even with the ignition off. It can even
switch o n again lat er by itsel f::::> & , if
• the temperature of the eng ine coo lant rises due to the heat
bu ild -up from the eng ine in the eng ine compartment, or
• the engine compartment heats up because the vehic le is parked
in i ntense sun ligh t.
& WARNING
• To reduce the ri sk of personal injury never touch the radiator
fan .
~

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& WA RNING ! continued )
• The auxiliary ele ctric fan is temperature controlled and can
s w itch on suddenly even wh en t he engine is not runn ing .
• The auxiliary radiator fan swit ches on automatic ally when the
engin e coolant rea che s a cer tain temperature and will con tinue to
run until the coolant temperature drop s. •
Brake f luid
Checking brake fluid level
The brake fluid level c an be checke d with a quick gl ance .
Fig. 288 E ngine
comp artm ent: B ra ke
flui d rese rvoir
Be fore you check a nything in th e en g in e co mpart ment,
always read and heed all WARNINGS=> & in "Working in
t h e eng ine compartment" on
page 331.
- Read the brake fluid l eve l from the brake fluid reservoir
=> fig. 288. The brake flu id level mus t be between the
"MIN" and "MAX" markings.
The brake fluid reservoir is locate d at the rear partition of the engine
compartment on the left side=>
page 332.
The fluid level may drop slightly after some time due to the auto ­
ma tic adjustment of the brake pads. This is not cause for alarm .
If the brake fluid leve l falls
considerably below the "MIN" mark , the
brake warning/indicator light (U.S. models:
BRAKE , Canadian models:
«D> l will come on=>
page 23 and=> page 32 . Do not continue to
operate the vehicle. The complete brake system should be thor ­
oughly checked
by an author ized Audi dealer or qua lif ied workshop
and the cause corrected . If th e brake fluid level is too low, the brake
warning/indicator light w ill illumi nate. Contact an authorized Audi
dea ler
immedi ately .
[ i ] Tips
The brake fluid reservoir is located underneath the cover .•
Changing brake fluid
Have the brake fluid changed by an experience d techni ­
cian.
Brak e fluid absorbs mois ture from the air. If the wate r conten t in the
brake fluid is too high, corrosion in the brake sys tem may res ult
after a period of time . The boiling point of the brake fluid will also
decrease conside rably and decrease braking performance .
Therefore , the brake fluid mus t be changed
every two year s. Always
use new brake fluid which conforms to Federal Motor Vehicle S tan ­
da rd "FMVSS 116 DOT 4".
The brake fluid reservoir can be difficul t to reach, therefore , we
recommend that y ou have the brake fluid changed by your autho ­
rized
Audi deal er. Your dealer has the correct tools, the right brake
fluid and the know -how to do this for you .
& WARNING
• Brak e fluid is poi sonou s. It mu st be stored only in the clo sed
o riginal conta iner out of the rea ch of children! ..,.
Vehicle care I I irechnical data

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Starting with jumper cables ... .... . 387
Stopp ing . . . . . . . . . . . . . . . . . . . . . . . . 144
Engine compartment Safety instructions . ...... ..... .. . 331
Working the engine compartment .. 331
Engine coolant system ...... .... .... . 337
Adding coolant ....... .... .... ... 339
Checking coolant level .. .... .. .... 338
Checking the engine coolant level . .. 338
Malfunction ..... .... .... ......... 33
Radiator fan ........ ............ . 340
Engine coolant temperature Temperature gauge ...... .... ...... 13
Engine data ............... ......... 399
Engine hood
Closing ..................... .... 331
How to rel ease the hood .... .... ... 330
Engine oil . ... .. ..... ........... .... 333
Adding .............. .... .... ... 336
Additives ... .. .... .... .... .... ... 336
Changing .... .... .... ........... 336
Checking the engine oil level ... .... 335
Indications and condit ions r equiring ext ra
checking .... .... .... ... .... .... 335
Oil consumption . .... ... .... ..... 334
Oil grades .. ...... .... ........... 333
Recommended oil check intervals .. . 335
Specification and viscosity .. ....... 333
Engine oil level .. .... .... .... .... .... 37
Engine oi l pressur e
Mal func tion ....... ..... .... ... ... 33
Engine oil sensor defective . .......... . 37
Engine speed limitation ............ ... 37
Controls and equip­
ment Safety first
Entry assist
Rear seats .... ...... ........ ... .. . 99
Environment Break -in period ...... ...... .... ... 297
Catalytic conv erter .... .... .... .... 298
Disposing o f your v ehicle battery ... 346
Driving a t high speeds ............ 299
Driving to minimi ze pollution and noise .
299
Fuel . .... ........ .... .... ... .... 327
Fuel economy .... ..... .. .... .... . 299
L e aks under your v ehicle .. ........ 331
L etting th e ve hicle stand and warm up ..
300
Proper disposal of drained brake fluid
341
P roper disposal of drained engine
coolant .. ...... .. .. .... .... .... 339
Proper disposal of drained engine o il 336
Recycl ing us ed engine o il .... ...... 336
Unl eaded fuel ... .. ...... ..... ... . 325
What should I do with an old battery? 346
EPC
See Electronic power control .. .. .... 19
ESP
S ee Electronic stabilization program
(ESP) .. .... ... .................. 19
Event Data Recorder (EDR) ... ....... .. 288
Expansion tank ........... ...... .... 338
Explanation of some technical terms .. . 302
Ext erior lighting in the mirror hous ing . .. 76
Eyeglasses compartment ............. 121
F
Fall line ... .. .... .... ...... .... ... .. 302
Fan Four -zone automatic comfort a ir
conditioning ... .. .... ........... 133
Radiator ..... .. ... ....... ... ..... 340
Flat tire Changing . .... .... .... .... ...... . 373
Floor mats . ... ...... .... ........ ... 226
Fog lights ........... ... .... .... ..... 75
Fo lding chocks .. ... ... .. .... .... .... 370
Fo ldin g master key with remote control .. 48
Foot pedals . ...... .. .... .... .... .... 226
For the sake of the environment Gasoline fumes and th e environment 327
L et ting your eng ine warm up ... ....
143
Reducing engine noise by early
upshifting . ...... ....... .... .. . .. 13
Refueling ..... .... .... .. .. ... .. .. 327
Saving fuel by early upshifting .... . .. 13
Using the rear window defogg er ... . 129
Fording depth ........... .. . ........ 302
Four -zone automa tic comfort a ir
conditioning ... .. .... ........... 131
Automatic mode in rear . ........ .. 132
Heated rear seats ...... .... ....... 137
Rear air distribution ... .... .... .... 133
Rear con trols .... .... .... .... ... . 131
Rear fan . .... ... .... ... .. .... .... 133
Rear operation .... ...... .... .... . 135
Rear temperatu re ............ ... .. 133
Vehicle operation Vehicle care Do-it-yourself service Technical data

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s liding open ..... ........ ...... ... 68
Sunshade ... .... .... ....... .... .. 69
tilting .... .... .... .... ... .... .... . 68
Parking ............................ 147
Automatic transmission ... ... .... . 184
Caution when parking near a parking bar -
rier or curb ...... .... ........... 147
Low bumper cover, spoi lers and
suspension .... .... .... ...... .. 147
Parking brake ..... ...... .... ..... .. . 147
Parking ...... .... .... ... .... .... 147
Warning/indicator lights .. .... .... .. 23
Parking on a decline (downhill) .. ...... 147
Parking on an incline (uphill) .. ... .... . 147
Parts replacement ... .... .... ...... .. 403
PASSENGER AIR BAG OFF light ... .. ... 253
Passenger's seat ..... .... ... .... .. 93, 96
Passive safety system .. .............. 220
Pedals ... ......... ... ........ .... .. 226
Perimeter lighting ... .... .... .... .... . 76
Physical principles of a frontal collision 232
Polishing ...... .... .... .... ... .... . 315
Po llen filter
Climate controls ...... ....... .... . 123
Power locking switch ... .... .... .... .. 55
Power locking system ... .... .... .... .. 52
Convenience close/open feature .... . 66
Locking and unlocking the vehicle from inside . ... .. .... .... ............ 55
Opening and c losing the windows ... 66
Rear lid/trunk lid .... .... .......... 57
Remote control key ................ 49
Se lective unlock feature ............ 55
Controls and equip­
ment Safety first
Settings ...
... .... ........ .. . .. .. . 55
Unlocking and locking vehicle ... ... . 53
Power outlets ........... ............ 118
Power seat
Contro ls ... .. .... ........ ....... . 93
Seat adjustment ..... ....... .. .... . 94
Power steering ......... .... .... ... .. 293
Power window switches .... ....... .... 64
In the driver's door .. ......... .... . 65
In the front passenger 's door ... .... . 66
Reactivating the system .. .... .... .. 67
Pregnant women Special considerations when wearing a safety belt ....... .... ....... ... 237
Programming the Homelink® universal re-
mote control .... .... .... .... ... 214
Proper occupant seatiing positions .. ... 222
Proper safety belt position ...... .. .... 236
Proper seating position
Front passenger ... .... .... .... ... 223
Occupants .... .... .... ... .... .... 222
Rear passengers .. ... .... .... .... 224
Protective tray 109
a
Quartz clock .... .... ... .... .... .... .. 14
quattro®
See All Wheel Drive ............... 294
Question What happens to unbelted occupants? .
233
Why safety belts? . .... .... .... .... 23 1
R
Radiator fan .... .... .... .... .... .... 340
Rain sensor ...... .... ..... .. .... ... . 81
Rain sensor defective . .... ... .... .... . 36
Reading lights
Front ... ... ........ ... .... .... ... 78
Rear . .... ..... .. .... .... .... ... .. 79
Rear ashtray ... .. .... .... ... ... ... .. 116
Rear fog lights .. .... ........ .... .... . 75
Rear lid
Automatic operation .... ..... ...... 58
Emergency unlocking . .... ... .... .. 60
Opening and closing ... ... .... ..... 57
Valet key function .... .... .... ... .. 51
Rear light
Defective . ........ .... .... ...... ..
27
Rear operation
Four -zone automatic comfort air
conditioning ... .. ....... .... .... 135
Rear seats Adjusting seat .................... 99
Entry assist ... .... .... ... .... ..... 99
Fo lding seat back up and down . .... 100
Rear view
See Rear-view camera ............. 191
Rear view mirror Inside rear view mirror ..... .... . 86, 87
Rear window defogger ... .... ... .... . 129
Rear -view camera .. ... .. .... .... 191, 194
Parking mode 1 .... .... ........ .. 196
Parking mode 2 .... ...... .... .... 198
Red symbols ...... ....... .... ... ..... 31
Vehicle operation Vehicle care Do-it-yourself service Technical data