2016 AUDI A6 radiator cap

-Never open the engine hood if you see or
hear steam, or if you see engine coolant
dripping from the engine compartment. You
could burn yourself. Let the engine cool off
first until you can no longer see or hear steam or coolant escap ing .
Q) Note
-Mounting additional lights or accessories in
front of the air inlets reduces the cooling ef­
fect of the radiator. At h igh outside temper­
atures or h igh engine load, the engine cou ld
ove rheat.
- The front spoiler has been designed to prop­
erly distribute the cooling air when the veh i­
cle is moving.
If the spoiler is damaged, this
could red uce the cooling effect and the en­
gine could then overheat . Ask your author ­
ized Audi dealer for assistance.
Tachometer
The tachometer displays the engine speed in rev­
olutions per minute (RPM).
You shou ld shift to the next lowest gear when
the speed is below 1500 RPM. The beginning of
the red zone in the tachometer indicates the maximum permissib le engine speed for all gears
once the engine has been broken in and when it is
warmed up to operating temperature. Before reaching the red zone, you should shift into the
next h igher gear, choose the Dor S selector lever
position, or remove your foot from the accelera ­
tor pedal.
CD Note
The tachometer needle© c::> page 10, fig. 3
should only be in the red zone br iefly: other­
w ise, this increases the risk of e ngine dam-
age. The location where the red zo ne begins
varies depend ing on the eng ine.
@, For the sake of the environment
Upshifting early helps you to save fuel and re­
duce operating noise.
In strum ents an d ind ic a to r ligh ts
Fuel level
The fue l gauge only works when the ignition is
on.
If t h e fue l level drops below 2.6 gallons (10
lite rs), the bottom LED turns red and the indica­
tor light
t]J turns on c::> page 21. The bottom
LED blinks red when the fue l level is very low.
T he possible range based on the c urrent fue l lev­
el is shown in tab@c::>
page 23, fig . 4 .
Fo r the tank capacity in your veh icle, refer to the
T echn ica l Data c::>
page 2 71.
CD Note
Never drive until the tank is completely emp­
ty. The irregu la r supply of fuel that resu lts
from that can cause t he engine to m isfire. Un­
combusted f uel w ill then en ter the exha ust
system . This can cause ove rheating and dam­
age to the catalytic converter.
Indicator lights
Description
T he ind icator lights in the instrument cluster
blink or turn on. They i ndicate functions o r mal­
funct ions c::>
.&,.
Messages may appear with some ind icator lights.
A war ning s ignal will sound at the same time.
T he ind icator lights and messages in the ce nte r
of the disp lays may be replaced by other displays.
T o s how them again, select the tab for indicator
li gh ts and messages using the m ultifunction
steering wheel c::>
page 23. If there are several
malfunctions, you can display them one at a time
us ing the thumbwheel.
Some indicators lights in the display can t urn on
in several colors.
A WARNING
- Fai lure to heed wa rning lights and other im­
portant vehicle information may result in
serious personal injury or vehicle damage.
- Whenever stalled or stopped for repair,
move the vehicle a safe d istance off the
road, stop the engine, and turn on the
emergency flasher c::>
page 47.
11

Checking and Filling
Checking and Filling
Hood
Releasing the engine hood
The engine hood is released from inside the vehi­
cle .
Fig. 184 Driver footwell: release leve r
Fig . 185 Rocker switch under the hood
Make sure the wiper arms are not raised up from
the windshield . Otherwise the paint could be
damaged .
.. With the driver's door open, pu ll the lever un ­
der the instrument panel in the direction of the
arrow ¢
fig. 184.
.. Raise the hood slightly Q _A .
.. Press the rocker switch under the hood upward
Q fig. 185. This releases the catch.
.. Open the hood.
A WARNING
Hot engine coo lant can burn you .
- To reduce the risk of be ing burned, never
open the hood if you see or hear steam or
coolant escaping from the eng ine compart­
ment. Wait unt il no steam or coolant can be
216
seen or heard before carefully open ing the
hood.
Working in the engine compartment
Be especially careful whenever you work in the
engine comportment.
Whenev er yo u mu st perform an y work in the
engin e compartment , for example ch ecking and
filli ng d iffe rent fl uids , the re is a risk of injury ,
bu rn s and a ccid ents . To pre ve nt p erso nal injur y
a lway s obse rve the foll owing WARNING S. The
e ng ine compartment o f an y v ehicl e is a haz ard ­
ou s a rea
Q _6 .
A WARNING
To he lp avoid injury, before you check any­
thing under the hood:
- Turn off the engine .
- Switch off the ignit ion.
- Apply the parking brake.
- Move selector lever to P (Park).
- Always let the eng ine cool down. Hot com-
ponents will burn skin on contact .
-
-To redu ce the risk of being burned, never
open the hood if you see or hear steam or
coo lant escaping from the engine compart­
ment . Wait until no steam or coolant can be
seen or heard before carefully open ing the
hood.
- Keep children away from the engine com­
partment .
- Never sp ill fluids on hot engine compo­
nents. 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 sti ll 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 .

• Park your vehicle on a level surface.
• Switch
off the ignition.
• Read the engine coolant level from the coolant
expansion tank¢
fig. 189, ¢ page 218,
fig. 186.
With a cold engine, the coolant level
should be between the "min" and "max" mark­
i ngs . When the engine is warm, the level may
be s light ly above the "max " marking.
The location of the coolant expans ion tank can be
seen in the engine compartment illustrat ion
¢pag e 218.
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 coo lant level is too low, the warning
light in the Auto-Check System
c:> page 15 wi ll il­
luminate until you add coolant and the level has
been restored to normal. Even though there is an
e lectric coolant level sensor, we still recommend
you check the coolant level from t ime to t ime.
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 Audi 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 re­
sult of overheat ing.
A 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 eng ine and allow it to cool
down.
- Protect your face, hands and arms from es­
caping 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 applying
light, downward pressure on the top of the
cap.
Checking and Filling
-To avoid being burned, do not spill anti­
freeze or coolant on the exhaust system or
hot engine parts. Under certain cond itions,
the ethylene glycol in engi ne coolant can
catch fire.
(D Note
Do not add any type of radiator leak sealant
to your vehicle's engine coolant. Add ing radia­
tor 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 compart­
ment,
always read and heed all WARNINGS
¢.&. in Working in the engine compartment on
page 216.
• Requ irement: There must be a residual amount
of coolant in the expansion tank
c:> (D .
•Turnoff the engine .
• Let the engine cool down.
• Place a thick rag over the coolant expans ion
tank
c:>p age 222 , fig. 189 and carefully twist
the cap counter-clockwise
c:> _& .
• Add coo lant mixed in the correct ratio
c:> page 222, Coolant up to the MAX marking .
• Make sure that the fluid level remains stable.
Add more coolant if necessary.
• Twist the cap on again
tightly.
Replacement engine coolant must conform to ex ­
act specifications
c> page 222, Coolant.
We recommend using only coolant additive Gl2+
+ , Gl3
or in an emergency Gl2+. Do not use a
different additive. In an emergency use plain wa­
ter 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 coo l­
ant, then you should add cold antifreeze and cold
water only when the engine is co ld.
Always use
new engine coolant when refi lling.
223

Check ing and F illing
Do not fill coolant above the "MAX" mark. Excess
coo lant wi ll be forced out through the pressure
relief valve in the cap when the eng ine becomes
hot.
A WARNING
- The cooling system is under pressure and
can get very hot . Reduce the risk of scald ing
from hot coolant by followi ng these steps.
- Tu rn off the engine and allow it to coo l
down.
- P rotect your face, h ands and arms from
escaping f lu id and steam by cover ing the
cap with a large, thick rag.
- Tu rn the cap slowly and very carefully in a
co unter -clockw ise direction while applying
light, downward p ressure on the top of
the cap.
- To avoid being bu rned, do not spill anti­
freeze or coolant on the exhaust system or
hot engine parts. Under certa in condi­
tions, the ethylene glycol in eng ine cool­
a nt can catch fire.
- Antifreeze is poisonous. A lways store anti­
freeze in its original container and well out
of the reach of children .
- If you dra in the coolant, it must be ca ught
and sa fely stored in a proper conta iner
clearly mar ked "poison".
(D Note
- Do not add coolant if the expansion tank is
empty . A ir cou ld enter the cooling system
a nd damage the eng ine. If this is the case ,
do no t continue dr iving. Seek professional
ass istance .
- Coolant pollutes t he e nvironment a nd could
cause an eng ine fire . Excess coolan t will be
fo rced o ut through th e pressure relief valve
i n the c ap whe n the eng ine be comes hot.
- If, in an emergency, o nly wate r can be add­
ed, the co rrect ratio between wate r and an­
ti fr ee ze ~
page 222 mu st be resto red a s
soon as possib le.
224
-
® For the sake of the environment
D raine d coolant should not be re use d. Always
d ispose of used coolant while observing a ll
environmental regulations.
Radiator fan
The radiator fan switches on automatically by it­
self
An a uxiliary e lectric ra diator fan switches on and
off depending on coo lant temperature and other
vehicle ope rating conditions .
A ft er yo u sw itc h t he engi ne off, the a uxi liary fan
can con tinue running for up to 10 m inutes -even
with t he ignitio n off .
It can even switch on again
l ater by itself~& . if
- t he tempera ture o f the engine coolan t rises d ue
to the heat build -up from the engine in the en­
gine compa rtment, or
- t he engine compar tment heats up beca use the
vehicle is pa rked in intense s unlight.
A WARNING
- To red uce the r is k of personal injury never
to uch the radiator fan .
- The a uxiliary e lectric fan is temperat ure
controlled and can switch on s uddenly even
when the engine is not running.
-
- The a uxiliary radiator fan switches on auto­
mat ically when the eng ine coolant reaches a
certain temperature and will continue to run
until the coo lant temperature d rops.

Pregnant women
Special considerations when wearing a safe-
ty belt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 139
Pre sense .. .. .. .. ........... .. .. .... .
Pressure (tires)
Pretensioners 184
249
Pre sense . . . . . . . . . . . . . . . . . . . . . . . . . . 184
Preventative passenger protection . . . . . . . 184
Prewarming . . . . . . . . . . . . . . . . . . . . . . . . . . 74
Proper occupant seating positions . . . . . . . 126
Proper safety belt position . . . . . . . . . . . . . . 138
Proper seating position Front passenger . . . . . . . . . . . . . . . . . . . . . 127
Occupants . . . . . . . . . . . . . . . . . . . . . . . . . . 126
Rear passengers . . . . . . . . . . . . . . . . . . . . . 128
Protecting . . . . . . . . . . . . . . . . . . . . . . . . . . . 205
Q
quattro (all wheel drive).......... ..... . 191
Quest ion
What happens to unbelted occupants? 135
R
Radiator fan 224
Rain/light sensor Headlights . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Indicator light . . . . . . . . . . . . . . . . . . . . . . . 22
Intermittent (windshield wipers) . . . . . . . . 51
Raising the vehicle . . . . . . . . . . . . . . . . . . . . 268
Range (fuel level) . . . . . . . . . . . . . . . . . . . . . . 24
Reading lights . . . . . . . . . . . . . . . . . . . . . . . . . 47
Rear fog lights . . . . . . . . . . . . . . . . . . . . . . . . 44
Rear lid Escape hand le . . . . . . . . . . . . . . . . . . . . . . 251
Opening and clos ing . . . . . . . . . . . . . . . . . . 36
Rear light Indicator light . . . . . . . . . . . . . . . . . . . . . . . 21
Rearview camera
refer to Parking systems . . . . . . . . . . 114, 115
Rear view m irror . . . . . . . . . . . . . . . . . . . . . . . 49
Rear window defogger (four-zone automatic
climate control) . . . . . . . . . . . . . . . . . . . . . . . 71
Rear window defogger (three-zone climate
control) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
Index
Recirculation mode (four-zone automatic cli­
mate control) . . . . . . . . . . . . . . . . . . . . . . . . . 70
Recirculation mode (three-zone climate con-
trol) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
Recuperation . . . . . . . . . . . . . . . . . . . . . . . . . 24
Refilling AdBlue With bottle . . . . . . . . . . . . . . . . . . . . . . . . . 214
With canister . . . . . . . . . . . . . . . . . . . . . . . 214
Refuelling . . . . . . . . . . . . . . . . . . . . . . . . . . . 210
Remote control Garage door opener (Homelink) . . . . . . . . . 42
Unlocking and locking . . . . . . . . . . . . . . . . . 33
Remote control key LED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Replacing the battery . . . . . . . . . . . . . . . . . 31
Remote rear lid release . . . . . . . . . . . . . . . . . 36
Repair manuals . . . . . . . . . . . . . . . . . . . . . . . 273
Repairs Airbag system . . . . . . . . . . . . . . . . . . . . . . 157
Replacing Light bulbs . . . . . . . . . . . . . . . . . . . . . . . . . 263
Replacing windshield wiper blades . . . . . . . . 52
Reporting Safety Defects . . . . . . . . . . . 132, 133
Reset button (trip odometer) . . . . . . . . . . . . 26
Resetting the trip odometer . . . . . . . . . . . . . 26
Residual heat (four-zone automatic climate
control) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
Retractor . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 7
Rims ..... ... .. .. .. ... ....... ... .. .. 246
Roof rack . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
Loading . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
Roof weight . . . . . . . . . . . . . . . . . . . . . . . . . 63
s
Safe driving habits
Safety 12S
Airbag system . . . . . . . . . . . . . . . . . . . . . . 142
Belts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 134
Cargo . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 131
Correct seating position . . . . . . . . . . . . . . 126
Pedal area . . . . . . . . . . . . . . . . . . . . . . . . . . 130
Safety belt pos ition . . . . . . . . . . . . . . . . . . . 138
Safety belt height adjustment . . . . . . . . . 139
Safety be lts worn by pregnant women . . . 139
Safety belt pretens ioner
Service and disposal . . . . . . . . . . . . . . . . . . 141
285