2015 AUDI A4 lock

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-Always keep the f iller nozzle complete­
ly inside the portable conta iner before
and during filling.
- If filling a portable container made of
metal, the filler nozz le must always be
in contact with the container. Th is w ill
he lp prevent static electricity from dis­
charg ing and cause a fire .
- Never sp ill fuel inside the vehicle or
luggage compartment. Fue l vapors are
h ighly f lammable .
- Always observe local and state/provin­ cial laws regarding the use, storage
and tra nspo rta tion of fuel containers.
- Make certa in the fuel conta iner meets
industry standards (A NSI
I ASTM
F852-86).
(D Note
If any fuel has spilled onto the car, it
should be removed immediate ly to prevent
damage to the paint.
@ For the sake of the environment
As soon as the correctly operated nozzle
sw itches off automatically for the fi rs t
time, the tank is full. Do not try to add
more f ue l because fuel may spill out. In
add it ion , the expans io n s pace in the fuel
t ank will be fi lled -ca using the fue l to
overflow when it becomes warm and pol ­
lute the env iro nment.
@ Tips
- Runn ing yo ur engine while re fuelling
may ca use vapors to escape o r even
ca use fue l to spill out of the tank . This
would then shut off the fuel nozzle be­
fo re the tank is fu ll.
- Do not refuel your ve hicle w ith the igni ­
tion t urned on. The fuel gauge may oth­
erwise not ind icate the correct fue l level
after refuel ling.
- The fuel filler flap of your vehicle is not locked when you lock the vehicle from
the i nside.
Fu el suppl y and filli ng your fuel t ank 211
Unlocking the fuel filler flap by hand
You can open the fuel filler flap by hand if the
power loc king system should fail .
Fig. 1 78 Sedan L uggage compartment: ope ning the
si de t rim
Fig. 17 9 Luggage com partme nt: Eme rge ncy o pen ing
of fue l
fi lier flap
The emergency opening mechanism is located
behind the r ight side trim panel in the l ug­
gage comp artment .
Opening the side trim
.,.. Sedan: Insert a tool such as a sc rewdriver
<=:> page 260 o r the emergency key into the
r ight side of the upper gap ¢
fig. 178.
.... Sedan: Pry upwar d to release the trim.
.,.. allroad: Open the rig ht side trim pane l.
Fuel filler door emergency release
.,.. Loosen the st rap from its bracket and p ull
on it
i=:> fig . 179 . You can now op en the fuel
filler flap as usual ¢
page 210.

212 Checking and filling
Checking and filling
Engine hood
Releasing and opening the engine hood
The engine hood is released from inside the
vehicle .
Fig. 180 Driver's side footwe ll: e ngin e hood release
lever
... -- - -=-
Fig. 181 Release lever u nde r the engine hood
Before opening the engine hood, make sure
that the windshield wipers are flat against the
windshield. Otherwise, they could damage the
pa int on the hood.
... With the driver's door open, pull the lever
under the instrument panel in the direction
of the arrow
c> fig . 180.
... Raise the hood slightly c> .&,
... Press the rocker switch under the hood up­
ward
c> fig . 181 . This releases the catch.
... Open the hood.
A WARNING
Hot engine coo lant can burn you.
- T o reduce the risk of being burned, never
open the hood if you see or hear steam
or coolant escaping from the engine
compartment. Wait until no steam or coo
lant can be seen or heard before care­
fully opening the hood.
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 en­
gage
c> .&, .
A WARNING
-
A hood that is not completely latched
could fly up and b lock your view while driv­
ing.
- When you close the engine hood, check it
to make sure the safety catch has proper­
ly engaged . The hood shou ld be flush
with the surrounding vehicle body parts.
-If you notice while driving that the hood
is not secured properly, 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 per­
sonal injury always observe the following
WARNINGS. The engine compartment of any
vehicle is a hazardous area
c> ,&..
A WARNING
-To help avoid injury, before you check any-
thing under the hood:
- Turn off the engine.
- Remove the ignition key.
- Apply the parking brake.
- Move selector lever of automatic trans-
mission to "P" (Park); put manual trans­
mission in Neutral.
- Always let the engine cool down. Hot
components will burn skin on contact .

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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 illus­
tration
<=> page 214.
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 17 will
blink until you add coolant and the level has
been restored to normal. Even though there is
an electric coolant level sensor, we still rec­
ommend 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.
A 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
Checking and filling 219
or hot engine parts. Under certain condi­
tions, the ethylene glycol in engine cool­
ant can catch fire.
([) 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 <=>
A in Working in the engine compart­
ment on page 212 .
Requirement: There must be a residual
amount of coolant in the expansion tank <=>(D.
.,. Turn
off the engine.
.,. Let the engine cool down.
.,. Place a thick rag over the coolant expansion
tank
<=> page 218, fig . 185 and carefully turn
the cap counter-clockwise
<=> .&_ .
.,. Add coolant mixed in the correct ratio
<=> page 218, Coolant up to the MAX mark­
ing.
.,. Make sure that the fluid level remains sta-
ble. Add more coolant if necessary.
.,. Twist the cap on again
tightly.
Replacement engine coolant must conform to
exact specifications <=>
page 218, 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 addi­
tive 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 . .,.
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220 Check ing and filling
Do not fill coolant above the "MAX" mark. Ex­
cess coolant will be forced out through the pressure re lief valve in the cap when the en ­
g ine becomes hot.
A WARNING
- The coo ling 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 slowly and very carefully in a co unte r-clockwise d irection while
apply ing light, downward press ure on
the top of the cap.
- To avoid being burned, do not spi ll an­
tifreeze or coolant on the exhaust sys­
tem or hot engine parts. Under certa in
conditions, the ethylene glyco l in en­
g ine coolant can ca tch f ire.
- Antifreeze is poisonous. Always store an­
t ifreeze in its original container and we ll
o ut of the reac h of children.
- If you drain the coolant, it must be
caught and safely stored in a p roper con­
ta iner clear ly ma rked "poison".
(D Note
- Do not add coolant if the expansion tan k
i s empty. A ir could enter the cooling sys­
tem and damage the eng ine. If this is
the case, do not continue driving. Seek professional assistance.
- Coolant po llutes the e nv ironment and
could cause an engine fire. Excess coo l­
ant will be forced ou t through the pres ­
su re rel ief v alve in the ca p when the en­
gine becomes hot .
- If, in an emergen cy, only water can be
added, the correct ratio be twee n wa te r
and antifr eeze¢
page 218 must be re ­
stored as soon as possib le .
{® For the sake of the environment
D rained coo lant should not be reused . A l­
ways d ispose of used coolant whi le observ­
i ng a ll environmental regulations.
Radiator fan
The radiator fan switches on automatically by
itself
T he rad iator fan is driven by the engine v ia the
V-belt. The viscous clutch regulates the spee d
of the fan acco rding to the temperature of the
coolant.
An a uxiliary electric radiator fan* sw itches on
and
off depending on coolant temperature
and othe r vehicle ope rat ing condit ions .
A ft er yo u sw itch the eng ine
off, the aux iliary
f an can continue running for up to 10 m inutes
- even wit h the ignition
off. It can even switc h
on again later by itself¢.&. , if
- t he temper ature of the engine coo lant rises
due to the heat build -up from the engine in
the engine compa rtment, or
- the engine compa rtment heats up because
the vehicle is parked in intense sunlig ht.
A WARNING ~
- To reduce the risk of perso na l inj ury nev -
er touch the radiator fan.
- The a uxiliary electric fan is tempe rat ure
contro lled and can sw itch on sud denly
even when the engine is not running.
- The a uxiliary radiator fan switches on a u­
tomatically when the engine coo lant
reac hes a certa in temperature and will
continue to ru n until the coolant temper­
ature drops.

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Brake fluid
Checking brake fluid level
The brake fluid level can be checked with a
quick glance.
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Fi g. 186 Eng ine compartment: Cover on the brake flu ­
id reservoi r
Before you check anything in the engine com­
partment,
a lwa ys read and heed a ll W ARN­
ING S c:> .&.. in Working in the engine compart­
ment on page 212 .
~ Read the brake fluid level from the brake
fluid reservoir
c:> fig. 186, <=> page 214,
fig . 182.
The brake flu id level must be be­
tween the "MIN" and "MAX" markings.
The brake fluid reservoir is located at the rear
partition of the engine compartment on the
left side
<::;> page 214 .
The fluid level may drop slightly after some
time due to the automatic adjustment of the
brake pads . This is not cause for alarm .
If the brake fluid level falls
considerably be­
low the "MIN" mark, the brake warning/indi­
cator light (U.S. models:~, Canadian
models: .) will come on
r:> page 15. Do not
continue to operate the vehicle. The complete b rake system shou ld be thoroughly checked
by an authorized A udi dealer or qualified
workshop and the cause co rrected . If the
b rake fluid level is too low, the brake warn ing/
indicator light w ill illuminate. Contact an au­
thorized Audi dealer
immediately .
@ Tips
The brake f luid reservoir is located under­
neath the cover .
Checking and fillin g 221
Changing brake fluid
Have the brake fluid changed by an experi­
enced technician.
Brake fluid absorbs moisture from the air. If
the water content in the brake fluid is too
high, corrosion in the brake system may result
after a period of time . The boiling point of the
brake flu id will also dec rease considerably and
decrease braking pe rformance.
Therefore, the brake fluid must be changed
every two years. Always use new brake flu id
which conforms to Federal Motor Vehicle
Standard "F MVSS 116 DOT 4".
The brake fluid reservo ir can be d iff icult to
reach, the refore, we recommend that you
have the brake fluid changed by your author­
i zed
Audi d ealer. Your dealer has t he correct
tools, the right brake fl uid and t he know-how
to do this for you .
A WARNING -.
-Brake fluid is poisonous . It must be stor­
ed only in the closed original container
out of the reach of children!
- Brake failure can resu lt from o ld or inap­
propriate brake f luid. Observe these pre­
cautions:
- Use only brake fluid that meets SAE
spe cificat ion
J 1 7 03 and conforms to
Federa l Moto r Ve hicl e Standard 116.
Always check with yo ur authorized Audi
dealer to make sure yo u are using the
correct bra ke fluid. The correct type of
brake f luid is also indicated on the
brake f luid reservoir.
- The brake fluid must be new. Heavy use
of the brakes can cause a vapor lock if
the brake fluid is left in the system too
l ong. This can seriously affect the effi­
c iency of the brakes as well as your
safety. Th is cou ld resu lt in an accident.
(D Note
Brake fluid will damage the paint of your
vehicle .

Tires and wheels 241
-Turn the valve stem cap coun- ize the new tire pressures in the •
ter-clockwise to remove it tire pressure monitoring sys-• '
from the tire valve. tern*
¢ page 257.
-Place the air pressure gauge
A WARNING
on the valve.
Incorrect tire pressures and/
-The tire pressures should only or underinflation can lead
be checked and adjusted when sudden tire failure, loss of
the tires are cold. The slightly control, collision, serious per-
raised pressures of warm tires sonal injury or even death.
must not be reduced. -When the
ti] warning sym-
-Adjust the tire pressure to the bol appears in the instru-
load you are carrying. ment cluster, stop and in-
-Reinstall the valve stem cap spect the tires.
on the valve. -Incorrect tire pressure and/
When should I check the tire or underinflation can cause
pressure? increased tire wear and can
The correct tire pressure is es- affect the handling of the
pecially important at high vehicle and stopping ability.
speeds. The pressure should -Incorrect tire pressures
therefore be checked at least and/or underinflation can
once a month and always be- also lead to sudden tire fail-
fore start ing a journey. Do not ure, including a blowout
forget to check the tire pres- and sudden deflation, caus-
sure for the spare wheel. ing loss of vehicle control.
When should I adjust the
-
The driver is responsible for
the correct tire pressures for
tire pressures?
all tires on the vehicle. The
Adjust the tire pressure to the applicable pressure values
load you are carrying. After are located on a sticker on
changing a wheel
or replacing the driver's side B-pillar.
wheels you have to adjust the
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addition, you must then initial-\!) 1.1'1
.... 1.1'1 ....

and sudden deflation and loss of control.
-Temperature grades apply to tires that are properly in­
flated and not over or un ­
derinflated.
-For technical reasons it is not always possible to use
wheels from other vehicles_ 1n some cases not even
wheels from the same vehi­
cle model.
-If you install wheel trim discs on the vehicle wheels
I
make sure that the air flow
to the brakes is not blocked.
Reduced airflow to the
brakes can them to over­
heat, increasing stopping
distances and causing a col­ lision.
-Run flat tires may only be used on vehicles that were
equipped with them at the
factory. The vehicle must have a chassis designed for
run flat tires and a factory­
installed tire pressure moni­
toring system* that indi­ cates a loss of tire pressure.
Incorrect use of run flat
tires can lead to vehicle damage or accidents. Check
Tires and wheels 253
with an authorized Audi dealer or tire specialist to
see if your vehicle can be
equipped with run flat tires.
If run flat tires are used
I
they must be installed on all
four wheels. Mixing tire types is not permitted.
(D Note
-For technical reasons, it is not generally possible to
use the wheel rims from
other vehicles. This can hold
true for wheels of the same
vehicle type.
-If the spare tire is different from the tires that you have mounted on your vehicle
(for example winter tires or
wide profile tires), then use
the spare tire for a short pe­ riod of time only and drive
with extra care. Replace the
flat tire with the tire match­ ing the others on your vehi­
cle as soon as possible.
-Never drive without the valve stem cap. The valves could get damaged.
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.. Turn the large screw q fig . 197 counter ­
clockwise.
.. Take out the spare tire.
.. Always store the vehicle tool kit, the jack *,
and the replaced tire in the luggage com­
partment
c:> page 132.
.. Unhook the cargo floor before clos ing the
rear lid .
Using the spa re tire (compact spare tir e)
The compact spare tire is only intended for
emergenc ies until you can reach a repair shop.
Replace it as quickly as possible with a stand­
ard wheel and t ire .
There are some restrictions on the use of the
compact spare t ire . The compact spare t ire
has been des igned specifically for your type of
veh icle.
It must not be swapped with a com­
pact spare tire from another type of veh icle.
Snow chains
For technical reasons, the use of snow chains
on the compact spare tire is
not p erm itted .
If you do have to drive with snow chains and a
front tire fails, mount the spare whee l w ith
tire instead of a rear tire. Install the snow
chains on the rear t ire and use it to replace
the defective front tire.
.,&. WARNING
- Never use the spare tire if it is damaged
or if it is worn down to the tread wear in­
dica to rs.
- If the spare tire is mo re tha n 6 years o ld,
use it only in an emerge ncy and w it h ex­
tr eme cau tion a nd careful d riving .
- T he spare tire is intended only fo r tem­
porary and sho rt-term use.
It should be
rep laced as soon as possib le w ith the
normal wheel and t ire.
- After mount ing the compac t spare ti re,
the tire pressu re must be che cked as
soon as possible . The tire pressure of the
compact spa re tire m ust be 4 .2 bar; oth­
erwise, you risk hav ing an accident.
- Do not drive faster than 50 mph (80 km/
h) . You risk having an accident.
What do I d o now ? 261
-Avoid full-thrott le acceleration, heavy
brak ing, and fast cornering. You risk hav­
ing an accident .
- Never drive using more than one spare
wheel and tire. You r isk having an acci­
dent .
- Normal summer or winter t ires must not
be mounted on the compact spare w heel
rim .
- For technical reasons, the use of tire
chains on the spa re tire is not permitted .
If it is necessary to drive with t ire chains,
the spare wheel must be mounted on the
fro nt axle in the event of a flat in a rear
tire. The newly available fron t wheel
m ust then be inst alled in place of the
rea r whee l w ith the flat tire. Installing
the tire chain before mounting the whee l
a nd tire is recommended.
- Loose items in the passenger compart ­
ment can cause serious personal injury
during hard brak ing or in an accident.
Never store the spare tire or jack and
too ls in the passenger compartment.
Inflatable spare tire
App lies to vehicles: wi th inflatable spa re tire
The inflatable spare tire expands to its full di­
ameter when it is inflated .
Fig. 19 8 I nflatable spare tir e w it h compressor
Removing inflatable spare tire
.. Lift up the cargo floo r us ing the handle .
.. Tur n the large screw ¢
fig. 198 counte r-
clockw ise.
.. Take out the in fla table spare tire.