2013 AUDI A6 radiator cap

Instrument s and warnin g/indic ator ligh ts 17
If the engine coolant level is correct, then the
radiator fan may be the cause of the malf unc­
tion .
• Coola nt te mpera tur e too high! Plea se let
e n gi ne r un with veh icle st atio nar y
If the indicator light turns on and the mes­
sage appears in trailer mode*, let the engine
r u n at id le for a few m inutes to cool down.
A 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 ha zard
warning lights
q page 42, Emergency
flasher.
- Never open the hood if you see or hear
steam or coolant escap ing from the en­
gine compartment -you risk being scald ­
ed . Wait until you can no longer see or
hear steam or coo la nt escaping.
- The engine compartment of any veh icle
is a dangerous area . Before you perform
any work in the engine compartment,
t ur n of the eng ine and allow it to cool.
Follow the warning sticke rs
q page 219,
Engine compartment .
(D Note
Do not continue driving if the. symbol
illuminates . There is a ma lf u nct ion in the
eng ine cooling system -you co uld damage
your engine.
0 Battery
This warning/indicator light detects a mal­
function in the generator or in the vehicle's
electrical system .
The. warning/ind icator light illuminates
when you switch on the ignition and must go
out after the engine has started .
• Alternator fault : Batt ery i s not being
c h arg ed
If the indicator light turns on and the mes­
sage appears, there is a malfunction in the
generator or veh icle electrical system .
Drive to your authorized A udi dealer or quali­
fied workshop immediate ly . Because the vehi ­
cle batt ery is discharging , turn off all unnec­
essary electrical equipment such as the rad io.
Seek professiona l assistance if the ba ttery
charge level is too low.
(•) Low b atte ry : b atte ry will be cha rged
w hil e driv ing
If the indica tor ligh t turns on and the mes­
sage appears, there may be limited starting
ab ility .
If this message t urns off afte r a lit tle while,
the battery charged enough while driving.
If the message does not turn off, have your
autho rized Aud i dea ler o r qualified workshop
cor rect the ma lfu nction .
,{,_ Safety belts
This warning/indicator light reminds you to
put on your safety belt.
The . warn ing/ indicator light illum inates
when the ignition is switched on to remind
the d river and any front passenger to put on
the safety be lt. Addit ionally, an aco ustic warn­
i ng (gong) wi ll also so und .
For more Informat io n
q page 136, ~ Safety
belt warning light.
't::7: Engine oil pressure malfunction
The red engine oil pressure warning symbol
requires immediate service or repair. Driving
with a low-oil-pressure indication is likely to
inflict severe damage to the engine .
• Switch off engine and ch eck o il leve l
If the indicator light tu rn s on and the mes­
sage appears, the oi l pressure is too low .
.. Pull off the road .
.. Stop the vehicle .
.. Turn off the engine.

the level may be slightly above the "max"
marking .
The location of the coolant expansion tank
can be seen in the engine compartment illus­
tration ¢ page 22 7.
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 16will
illuminate 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 cool­
ing system should be inspected immediately
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 scald­
ing 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 direction while ap­
plying light, downward pressure on the
top of the cap.
- To avoid being burned, do not spill anti­ freeze or coolant on the exhaust system or hot engine parts . Under certain condi­
tions, the ethylene glycol in engine cool ­
ant can catch fire .
Checking and filling 233
@ Note
Do not add any type of radiator leak seal­
ant to your vehicle's engine coolant. Add­
ing radiator repair fluid may adversely af­
fect the function 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 com ­
partment,
always read and heed all WARN­
INGS ¢ & in Working in the engine compart ­
ment on page 225 .
.,. Turn
off the engine .
.,. let the engine cool down.
.,. Place a thick rag over the coolant expansion
tank ¢ fig .
187 and carefully twist the cap
counter-clockwise ¢&_ .
.,. Add coolant.
.,. Twist the cap on again tightly.
Replacement engine coolant must conform to
exact specifications ¢ page
2 32, Coolant. We
recommend using only coolant additive G12+
+, G13 or in an emergency G12+. Do
not use a
different additive. In an emergency use plain
water until you can get the correct additive
and can restore the correct ratio. This should
be done as soon as possible.
If you have lost a considerable amount of
coolant, then you should add cold antifreeze
and cold water only when the engine is cold.
Always use new engine coolant when refilling.
Do not fill coolant above the "MAX" mark. Ex­
cess coolant will be forced out through the pressure relief valve in the cap when the en­
gine becomes hot.
A WARNING
- The cooling system is under pressure and
can get very hot. Reduce the risk of
II-
•
•

234 Checking and filling
scalding from hot coolant by following
these steps .
- Turn off the eng ine and a llow 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 p ress ure on
the top of the cap .
- To avo id being burned, do not sp ill 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, on ly water can be
added, the correct ratio between water
and antifreeze
c::> page 232 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
An auxiliary e lectr ic radiator fan switches on
and off depending on coolant temperature
and other vehicle operating cond itions. After you switch the engine off, the aux
iliary
fan can cont inue running for up to 10 minutes
- even w it h the ignition off. It can even switc h
on again later by itself
c::> .&. , if
- the temperatu re of the engine coo lant rises
due to the heat build-up from the engine in
the engine compartment, or
- the engine compartment heats up because
the vehicle is parked in intense sunlight.
A WARNING
-- To reduce the risk of persona l injury nev-
er touch the radiator fan.
- The a uxiliary electric fan is temperat ure
contro lled and can sw itch on suddenly
even when the engine is not running.
- The auxiliary radiator fan switches on a u­
tomatically when the engine coo lant
reaches a certain temperature and will
continue to run until the coolant temper­
ature drops .
Brake fluid
Checking brake fluid level
Fig. 1 88 En gin e compa rtme nt: cove r on t he brake fluid
reservoi r
Before you check anything in the engine com­
partment,
always read and heed all WARN­
INGS c:> A in Working in the engine compart­
ment on page 225.
.,. Read the brake fluid level from the brake
fluid reservoir
c::> fig. 188, c:> fig . 184. The
brake fluid level must be between the "MIN"
and "MAX" markings.
IJ>

298 Index
R
Radiator fan .. .. .. ..... ... .. .. .... . 234
Radio clock .. ... .... .... .. ... ... .. .. 27
Ra in/lig ht sensor
Headlig hts ... ........... .. .. .... .. 41
Intermittent (windshield wipers) .. .... 46
Sensor defective . . . . . . . . . . . . . . . . . . . . 22
Range~uel level) ..... ... .. .. .. .... .. 24
Read ing lights .. ........... .. .. .... .. 44
Rear fog lights . ........... .... .... .. 41
Rear lid Emergency release ... ... .. .. .. .... .. 38
Escape hand le . ..... ... .. .. .. .... . 261
Opening and clos ing ........ .. .... .. 37
Rear light Defective . . . . . . . . . . . . . . . . . . . . . . . . . 22
R ear v iew camera
ref er to Parking systems . . . . . . . 113, 1 14
Rear view mir ror ............. .. .... .. 48
Rear w indow he ati ng (a utoma tic climate
con trol) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
R ear w indow heating (climate control) . . . 66
Recirculation mode (automatic climate
control) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
Re circulation mode (climate control) . . . . 65
Refuelling . .. ... ... .......... ... .. . 222
Remote control Garage door opener (HomeL ink ®) .. ... 124
Unlock ing and locking ..... .... .... .. 34
Remote rear lid release ... .. .. .... .. . . 37
Repai r manua ls .. .. .. ... ... .. .. .. .. . 285
Repairs Airbag system ........... .. .. .. .. . 161
Replacing Fu ses . ..... ... . ...... ... .. .. .... . 270
L ig ht bulbs .... .. ..... ... .. .. .... . 273
Tires and wheels ......... .. .. ..... 252
W indshield wiper blades ..... .. .... .. 47
Report ing Safety Defects .... .. .. .. .. . 134
R eset b utton . ................ ... ... . 27
Retractor ..... .. .. ..... ... .. .. .... . 139
Ri ms ( clean ing) ............ .. .. .. .. . 213
Roof rack . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
Loading .. .. ... .... ...... .. .. .. .. .. 60
Roof weig ht . . . . . . . . . . . . . . . . . . . . . . . 60
s
SAFE .. .. .. .... .. ... .. .. ..... ... .. . 27
Safe driv ing habits ...... .. ... ..... .. 126
Safety be lt pos ition . . . . . . . . . . . . . . . . . 140
Safety be lt height adjustment ... .. .. 142
Safety be lts worn by pregnant women . 141
S afety be lt pretensioner . . . . . . . . . . . . . . 143
Se rvice an d disposa l .... .... ... .. .. 143
Safety be lt p retensioners
Pr e sense . .. .. .. .. ........... .. .. 190
Safety be lts . . . . . . . . . . . . . . . . . . . . . . . . 139
clean ing .. ... ... ................ . 218
Danger to passengers who do not wear a
safety be lt .. .. .. ............. .. .. 13 7
Fasten ing . .... .. ................. 139
He ig ht adj ustmen t .. ........... .. .. 142
Improperly wo rn . . . . . . . . . . . . . . . . . . 142
Not worn ..... .. .. .... .... ... .. .. 137
Safety be lt pos ition . . . . . . . . . . . . . . . . 140
Safety instr uctions ............... .. 139
Securing child safety seats .... .. .... 182
Spec ial considerations for pregnant
women ...... ... ................ . 141
U nfastening . .. .. ..... ....... ... .. 141
W arning/ind icator light ......... .... 136
War ning light . . . . . . . . . . . . . . . . . . . . . . 17
Why YOU MU ST wea r them ...... .. .. 136
Worn p roperly ... ... .. ..... .... . .. 138
Safety be lt te nsione r
drive select .. .. .. ............. .. ... 98
Safety be lt warning light ......... .. .. 136
Sa fety comp liance s tic ker ... ... .. .. .. 28 0
Safety equ ipme nt .. ... ....... ...... . 126
Safety features for occ upant restraint and
protection .. ....................... 126
Saf ety gu idelines
Seat adjustmen t . . . . . . . . . . . . . . . . . . . . 50
Safety i nstr uctions
En gine compartment ........... .. .. 22 5
f o r side curtain airbags ......... .... 169
f or using child safety seats ...... .... 175
f or using sa fe ty belts . .. ..... ... .. .. 139
Monito ring the Advance d Airbag Sys-
tem . ... .. .. .. .. .. .... . ..... ... .. 160
Safety sys tems
W arning/ind ic a tor lights ...... .. .. .. . 19