radiator cap AUDI A4 2016 Owners Manual

Driving
Starting the vehicle with the emergency
key
Applies to veh icles: w ith ig ni tio n lock
You can use the emergency key as an ignition key
in an emergency.
Fig. 97 Glove compartment: Adapter for e mergen cy key
Fig. 98 Insert emergency key into t he adapte r
.,. Take the adapter for the emergency key out of
the glove compartment ¢
fig. 97.
.,. Push the emergency key¢
fig. 98 fully into the
adapter. Make sure that the Audi rings are fac­
ing up.
.,. Press the emergency key in the adapter down
until it latches audibly.
.,. Insert the adapter with the emergency key for­
ward into the ignition switch. The engine can
now be started as usual.
Stopping the engine
App lies to veh icles: w ith ig ni tio n lock
.,. Bring the vehicle to a full stop.
.,. Automa tic transmission: Move the selector lev­
er to the P or N position .
.,. Press on the ignition key . The engine is turned
off .
.,. You can now remove the key .
82
Steering lock
The steering locks when you remove the ignition
key. The locked steering helps prevent vehicle
theft.
Emergency off
If it is necessary in unusual circumstances, the
engine can be switched off while the vehicle is
moving. The engine will be switched off if you
press on the key for an extended period .
A WARNING
-Never turn off the engine before the vehicle
has come to a complete stop. The full func­
tion of the brake booster and the power
steering is not guaranteed. You must use
more force to turn or brake if necessary . Be ­
cause you cannot steer and brake as you
usually would, this could lead to crashes
and serious injuries .
- For safety reasons, you should always park
your vehicle with the selector lever in P .
Otherwise, the vehicle could inadvertently
roll away.
- The radiator fan can continue to run for up
to 10 minutes even after you have turned
off the engine and removed the ignition key .
The radiator fan can also turn on again if the
engine coolant heats up because of intense
sunlight or heat build-up in the engine com­
partment .
- Always take the key with you whenever you
leave your vehicle . Otherwise, the engine
could be started or electrical equipment
such as the power windows could be operat­
ed. This can lead to serious injury .
- Never leave children or persons requiring as­
sistance unattended in the vehicle. The
doors can be locked using the remote trans­
mitter, preventing people from escaping
from the vehicle on their own in the event of
an emergency. Depending on the time of
year, people inside the vehicle can be ex­
posed to very high or very low tempera­
tures.

Checking and Filling
-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 com­ partment.
- Never spill 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 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.
- Do not remove the engine cover under any
circumstances. This increases the risk of
burns.
- 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 imme­
diately 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
204
to "P" (Park); put manual transmission in
Neutral.
- Always use extreme caution to prevent
clothing, jewelry, or long hair from get­
ting caught in the radiator fan, V-belts or
other moving parts, or from contacting hot parts . Tie back hair before starting,
and do not wear clothing that will hang or
droop into the engine.
- Minimize exposure to emission and chemi­
cal hazards
c::> /.1. .
A WARNING
California Proposition 65 Warning:
- Engine exhaust, some of its constituents, and certain vehicle components contain or
emit chemicals known to the State of Cali­
fornia to cause cancer and birth defects and
reproductive harm . In addition, certain flu­
ids contained in vehicles and certain prod­
ucts of component wear contain or emit
chemicals known to the State of California
to cause cancer and birth defects or other
reproductive harm.
- Battery posts, terminals and related acces­
sories contain lead and lead compounds,
chemicals known to the State of California
to cause cancer and reproductive harms .
Wash hands after handling.
(D Note
When adding fluids, always make sure that
they are poured into the proper container or
filler opening, otherwise serious damage to
vehicle systems will occur.
@ For the sake of the environment
To detect leaks in time, inspect the vehicle
floor pan from underneath regularly . If you
see spots from oil or other vehicle fluids, have
your vehicle inspected by an authorized Audi
dealer.

Check ing and F illing
blink until you add coolant and the level has been
restored to normal. Even though there is an e lec ­
tr ic coolant level sensor, we still recommend you
check the coo lant level from time to time.
Coolant los s
Coolant loss may indicate a l e ak in the cooling
system. In the event of coolant loss, the cooling
syst em should be insp ected immediately by your
authorized Audi dealer. It is not enough merely
to add coolant.
I n a
s e aled system, losses can occur only if the
boiling point of the coo lant is exceeded as a re­
sult of overheating.
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 wh ile apply ing
l ight, downward pressure on the top of the
cap .
- To avo id being burned, do not sp ill anti ­
freeze or coolant on the exhaust system or
hot eng ine parts . Under certain conditions,
the ethy lene g lycol i n engine coolant can
catch fire.
{Q) Note
Do not add any type of radiator leak seala nt
to your veh icle's engine coolant . Adding radia­
to r repa ir fluid may adversely affec t the func­
tion and performance of yo ur 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 anyth ing in the eng ine compart­
ment,
a lwa ys re ad an d heed all WARNINGS
210
¢ A in Working in the engine compartment on
page 203.
Requireme nt: The re must be a res idual amount
of coo lant in the expans ion tank
~CD-
.,,. Turn off the engine .
.,,. Let the engine cool down.
.,,. Place a thick rag over the coolan t expa nsion
tank ¢ page 209, fig. 184 and
carefull y turn
the cap counter-clockwise ¢.&_ .
.,,. Add coo lant mixed in the correct ratio
~ page 208, Coolant up to the MAX marking.
.,,. Make sure that the fluid level remains stab le.
Add more coolant if necessary .
.,,. Twist the cap on aga in tightly.
Replacement engine coolant must conform to ex­
act specifications ¢ page 208, Coolan t.
We recommend using only coo lant additive
G l2 +
+ , Gl3
or in an emergency Gl2+. Do not use a
different additive . In an emergency use plain wa ­
ter unt il you can get the correct addit ive and can
restore the correct rat io. Th is should be done as
soon as possible.
If you have lost a considerable amount of cool­
ant, then you should add cold antifreeze and cold
water only when the engine is cold.
Always use new engine coo lant when refilling .
Do not fi ll coolant above the "MAX " mark. Excess
coolant will be forced out th rough the pressure
relief valve in the cap when the engine becomes
hot.
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 engine and a llow 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 s low ly and very ca refully in a
counter-clo ckwise direction wh ile app ly ing
li ght, downward pressure on the top o f
the cap.
~

,....,
N
0
""' CX) ,....,
I.Cl U"I ,....,
I.Cl ,....,
-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.
- Antifreeze is poisonous. Always store anti­
freeze 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".
(D Note
-Do not add coolant if the expansion tank is
empty . Air could enter the cooling system
and damage the engine. If this is the case,
do not continue driving. Seek professional
assistance.
- 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 add­
ed, the correct ratio between water and an­
tifreeze
c::> page 208 must be restored as
soon as possible.
@) For the sake of the environment
Drained coolant should not be reused. Always
dispose of used coolant while observing all
environmental regulations.
Radiator fan
The radiator fan switches on automatically by it­
self.
The radiator fan is driven by the engine via the V­
belt . The viscous clutch regulates the speed of
the fan according to the temperature of the cool­
ant.
An auxiliary electric radiator fan* switches on and
off depending on coolant temperature and other
vehicle operating conditions.
After you switch the engine off, the auxiliary fan
can continue running for up to 10 minutes -even
Checking and Filling
with the ignition off. It can even switch on again
later by itself
c::> & , if
- the temperature of the engine coolant rises due
to the heat build-up from the engine in the en­
gine compartment, or
- the engine compartment heats up because the
vehicle is parked in intense sunlight.
A WARNING
-To reduce the risk of personal injury never
touch the radiator fan.
- 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 auto­
matically 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 broke fluid level con be checked with o quick
glance .
Fig. 185 En gi ne compartmen t: Cover on the b rake fl uid
reservoir
Before you check anything in the engine compart ­
ment,
always read and heed all WARNINGS
c::> _.& in Working in the engine comportment on
page 203.
.,. Read the brake fluid level from the brake fluid
reservoir
c::> fig. 185, c::> page 205, fig . 181 . The
brake fluid level must be between the "MIN"
and "MAX" markings.
211

Index
Engine hood Closing . . . . . . . . . . . . . . . . . . . . . . . . . . . .
203
How to release the hood . . . . . . . . . . . . . . 203
Engine oil . . . . . . . . . . . . . . . . . . . . . . . . . . . 205
Adding .. .. .. ............... .... ... 207
Additives . . . . . . . . . . . . . . . . . . . . . . . . . . . 207
Changing . . . . . . . . . . . . . . . . . . . . . . . . . . 208
Check oil level . . . . . . . . . . . . . . . . . . . . . . 207
Consumption . . . . . . . . . . . . . . . . . . . . . . . 207
Indicator light .. .................. 17, 20
Oil consumption . . . . . . . . . . . . . . . . . . . . . 206
Pressure malfunction . . . . . . . . . . . . . . . . . 17
Sensor defective . . . . . . . . . . . . . . . . . . . . . . 20
Specification and viscosity . . . . . . . . . . . . . 205
Engine speed limitation . . . . . . . . . . . . . . . . . 20
Environment
Catalytic converter . . . . . . . . . . . . . . . . . . .
186
Disposing of your vehicle battery . . . . . . . 215
Driving at high speeds . . . . . . . . . . . . . . . . 187
Fuel. .... .. .. .. ............. .... .. . 200
Leaks under your vehicle . . . . . . . . . . . . . . 203
Letting the vehicle stand and warm up . . . 187
Proper disposal of drained brake fluid . . . 212
Proper disposal of drained engine coolant 210
Proper disposal of drained engine o il 207, 208
Recycling used engine oil . . . . . . . . . . . . . 207
Roof rack . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
Unleaded fuel . . . . . . . . . . . . . . . . . . . . . . . 198
What should I do with an old battery? 215
E PC
refer to Electronic power control . . . . . . . . 20
Ethyl alcohol (Fuel) . . . . . . . . . . . . . . . . . . . . 199
Event Data Recorder (EDR) . . . . . . . . . . . . . 176
Expansion tank
Exterior lighting
Exterior mirrors 209
48
Adjusting . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
D ' . 1mming ... .. .. ................ ..... 52
Heating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
F
Fan
Radiator
211
Fastening
Booster seats . . . . . . . . . . . . . . . . . . . . . . .
166
Convertible chi ld safety seats . . . . . . . . . . 164
Infant seats . . . . . . . . . . . . . . . . . . . . . . . . 163
266
Fastening eyes
refer to Tie-downs . . . . . . . . . . . . . . . . . . . . 72
flexib le fue l . . . . . . . . . . . . . . . . . . . . . . . . . . 199
Floor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
Floor mats . . . . . . . . . . . . . . . . . . . . . . . . . . . 126
Fog lights/rear fog light(s) . . . . . . . . . . . . . . 48
Fold ing the rear seats . . . . . . . . . . . . . . . . . . . 69
Foot pedals . . . . . . . . . . . . . . . . . . . . . . . . . . 125
For the sake of the environment
Environmentally -friendly driving . . . . . . .
187
Gasoline fumes and the environment . . . . 200
Letting the engine warm up . . . . . . . . . 80, 83
Refueling . . . . . . . . . . . . . . . . . . . . . . . . . . 200
Sav ing fuel by early upshifting . . . . . . . . . . 11
Front airbags
Description . . . . . . . . . . . . . . . . . . . . . . . . .
142
How they work . . . . . . . . . . . . . . . . . . . . . . 146
Frontal collisions and the laws of physics . . 131
Front passenger 's door emergency locking . . 36
Front seats
Adjusting . . . . . . . . . . . . . . . . . . . . . . . . . .
123
Child restraints in the front seat . . . . . . . . 139
Fuel
Additives .. ... ... ... ...... ....... ...
198
Blended gasoline 198
Consumption . . . . . . . . . . . . . . . . . . . . . . . . 24
Fuel gauge . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Gasoline add it ives . . . . . . . . . . . . . . . . . . . 200
Low fue l level symbol . . . . . . . . . . . . . . . . . 20
Octane rating . . . . . . . . . . . . . . . . . . . . . . . 198
Recommendation ... ................. 198
Refuelling . . . . . . . . . . . . . . . . . . . . . . . . . . 200
Reserve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Saving fuel . . . . . . . . . . . . . . . . . . . . . . . . . 187
Tank capacity . . . . . . . . . . . . . . . . . . . . . . . 256
Tank system . . . . . . . . . . . . . . . . . . . . . . . . . 20
Unlocking the fuel filler flap by hand . . . . 202
Fuel economy messages (efficiency program) 28
Fuel filler flap
Unlocking the fuel filler flap by hand . . . .
202
Fuses
A . ss 1gnment . .. .. .. .. .. ..... 246, 247, 248
Replacing . . . . . . . . . . . . . . . . . . . . . . . . . . 246
G
Garage door opener (HomeLink) . . . . . . . . . . 44

Index
Proper occupant seating positions . . . . . . . 122
Proper safety belt posi tion . . . . . . . . . . . . . . 134
Proper seating posit ion
Front passenger . . . . . . . . . . . . . . . . . . . . . 123
Occupa nts . . . . . . . . . . . . . . . . . . . . . . . . . . 122
Rear passengers . . . . . . . . . . . . . . . . . . . . . 124
Protecting . . . . . . . . . . . . . . . . . . . . . . . . . . . 195
P rotective l iner . . . . . . . . . . . . . . . . . . . . . . . . 75
Q
Qua rtz clock . . . . . . . . . . . . . . . . . . . . . . . . . . 12
quattro
refer to all-wheel drive . . . . . . . . . . . . . . . 182
Q uestion
What happens to unbel ted occupants? 13 1
R
Radiator fan . .. .. ............. .... .. . 211
Ra in/light sensor
H eadlig hts . . . . . . . . . . . . . . . . . . . . . . . . . . 48
I ntermittent (w indshield wipers) . . . . . . . . 54
Sensor defective . . . . . . . . . . . . . . . . . . . . . . 2 1
Ra is ing the veh icle . . . . . . . . . . . . . . . . . . . . 254
R eading ligh ts . . . . . . . . . . . . . . . . . . . . . . . . . 51
Rea r doo r su n shade . . . . . . . . . . . . . . . . . 53, 54
Rear fog lights .. .. .. .. .. .. .. .. .. .. .. .. 48
Re ar lid
Autom atic o peration . . . . . . . . . . . . . . . . . . 38
Emergency release . . . . . . . . . . . . . . . . . . . . 40
Escape hand le . . . . . . . . . . . . . . . . . . . . . . . 40
Opening and clos ing . . . . . . . . . . . . . . . . . . 37
Rea r light
D efe ctive . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Rea r parking sys tem . . . . . . . . . . . . . . . . . . . 114
Rea r parking system with rearview camera . 115
Rea r view came ra
Par king mode 1 . . . . . . . . . . . . . . . . . . . . . 1 18
P a rking mode 2 . . . . . . . . . . . . . . . . . . . . . 119
Rea r view m irror . . . . . . . . . . . . . . . . . . . . . . . 52
Rear window heat ing . . . . . . . . . . . . . . . . . . . 78
Re ar window su n sha de . . . . . . . . . . . . . . . . . 54
Rear window washer system . . . . . . . . . . . . . 54
R ecirc ulation mode (automatic climate con -
trol) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78
Ref uell ing . . . . . . . . . . . . . . . . . . . . . . . . . . . 200
270 Release
lever for hood . . . . . . . . . . . . . . . . . 203
Remote control Gar age door opene r (Home link) . . . . . . . . . 44
Remote control key . . . . . . . . . . . . . . . . . . . . 32
Personaliz ing . . . . . . . . . . . . . . . . . . . . . . . . 32
u nlocking/lock ing . . . . . . . . . . . . . . . . . . . . 34
Remote rear lid release . . . . . . . . . . . . . . . . . 3 7
Repair manuals . . . . . . . . . . . . . . . . . . . . . . . 258
Repairs Airbag system . . . . . . . . . . . . . . . . . . . . . . 151
Replacement key . . . . . . . . . . . . . . . . . . . . . . 32
Replacing Windshie ld w iper b lades . . . . . . . . . . . . . . . 56
Replacing bulbs . . . . . . . . . . . . . . . . . . . . . . 249
Replacing wiper blades . . . . . . . . . . . . . . . . . 56
Reporting Safety Defects . . . . . . . . . . . 128, 129
Reset button . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Ret rac to r . . . . . . . . . . . . . . . . . . . . . . . . . . . . 133
Revers ible f loor . . . . . . . . . . . . . . . . . . . . . . . . 75
Reversible mat . . . . . . . . . . . . . . . . . . . . . . . . 73
R igh t hand dr ive . . . . . . . . . . . . . . . . . . . . . . . SO
Rims .......... .. .. .. ............. .. 232
Roof rack . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
Roof load . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
Roof weight . . . . . . . . . . . . . . . . . . . . . . . . . 68
s
SA FE 12
Safe d riving habits . . . . . . . . . . . . . . . . . . . . 121
Safelock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
S afety
Airbag system ... .. ... .. .. ..... ... . .
Be lts
.. ... .. .. .. .. .. ... . .. .... ... ..
Cargo 138
130
126
Correct seat ing pos ition . . . . . . . . . . . . . . 122
Pedal area . . . . . . . . . . . . . . . . . . . . . . . . . . 12S
Safety be lt pos ition . . . . . . . . . . . . . . . . . . . 134
Safety be lt heig ht adjustment . . . . . . . . . 135
Safety be lts worn by pregnant women . . . 135
Safety be lt pretens ione r
Se rvice and disposal. .. .. ........... .. 13 7
Safety be lts . . . . . . . . . . . . . . . . . . . . . . 130, 133
Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . 195
Danger to passengers who do not wear a
safety be lt . . . . . . . . . . . . . . . . . . . . . . . . . 131
Fastening 133