2016 AUDI A4 engine coolant

Instruments and indicator lights
Instruments and indicator Lights
Instruments
Instrument cluster and controls
The instrument cluster is your central source of information.
Fig. 3 Overview of the instr ume nt cluste r
(D Coolant temperature gauge .. .. .
@ Tachometer .... .. .. ..... .... .
@ Warning/indicator lights ...... .
@ ISETI button ....... ...... .... ·
® Display
- Driver information system .... .
- Time and date display ........ .
- Odometer .... ............ . .
® Reset button for trip odometer
® Fuel gauge ... ..... ..... ..... .
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11
13
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23
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12
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-When switching the ignition on, the needles
in the instrument cluster swing upward
briefly.
- The illumination for the instrument cluster
lights up whenever you switch on the igni­
tion with the
vehicle headlights off. As the
daylight fades, the instrument cluster illu­
mination likewise dims automatically and
will go out completely when the outside
light is very low . This feature is meant to re­
mind you to switch on the headlights when
outside light conditions become poor.
10
Engine coolant temperature gauge
The engine coolant gauge¢ page 10, fig. 3@
only works when the ignition is on. To prevent
damage to your engine, please note the follow­ ing important points:
Engine cold
If the needle is at or close to the bottom of the
gauge, the engine has not yet reached its operat­
ing temperature. Avoid high engine speeds,
heavy engine loads, and heavy throttle applica­
tions .
Normal temperature
When the engine has reached its operating tem ­
perature, the needle will move to the middle of
the gauge and remain there. If the engine is
working hard at high outside temperatures, the
needle may move higher on the gauge . This is not
a cause for concern as long as the . warning
li ght i n the inst rument cluster display does not il­
luminate . If the . warning light in the instru­
ment cluster display flashes, this can mean one
of two things : either the coolant
temperature is
too high, or the coolant
level is too low
¢page 17 ..,.

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A WARNING
-Always observe the warning in ¢ page 203,
before opening t he hood and checking the
engine coolant level.
- Never open the engine hood if you see or
hear steam, or if you see engine coolant
dr ipping from the engine compartment. You
cou ld burn yourself. Let the engine cool off
firstsothatyoucannothearo rseeany
steam or engine coo lant.
0 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
atu res or high engine load, the engine could
overheat.
- The front spoiler has been designed to prop­
erly distribute the cooling air when the vehi­
cle is moving. If the spoiler is damaged, this
could reduce the cooling effect and the en­
gine could then overheat. Ask your author­
ized Audi dealer for assistance.
Tachometer (engine rev counter )
The tachometer indicates the engine RPM (revo­
lutions per minutes).
If engine RPM drops below 1,500, you should
downshift to the next lower gear. The red area at
the end of the scale indicates maximum permis­
sible eng ine RPM after the break-in period. Be­
fore reaching this area, move the selector lever
to position D/5 or ease your foot off the accelera­
tor pedal.
(D Note
The tachometer needle@¢ page 10, fig. 3
should only briefly be in the red zone: you
could damage your eng ine! The beginning of
the red zone varies depending on the engine.
@ For the sake of the environment
Upshifting early saves fuel and reduces en­
gine noise.
Instruments and indicator lights
~button
Fig. 4 SET button in the instrument cluster
The !SET I button performs the following func­
tions:
Switching on time, date, temperature
display and odometer
The display appears for approximately 30 sec­
onds when you press the
ISETI button¢ fig . 4
with the ignition off.
Starting the Auto-Check sequence
The Auto-Check system constantly monitors cer­
tain indiv idual functions and components of the
vehicle when the ignition is turned on and when
the vehicle is moving.
With the ignition turned on, you can start the
"Auto-Check sequence" by pressing the
! SETI but­
ton. You can perform an Auto-Check sequence
when the vehicle is stat ionary and the ignition is
turned on or when the vehicle is moving slower
than 3 mph (5 km/h).
In addition, the number of keys initialised for
your vehicle is displayed.
L2 3/3 means that
th ree keys have been initialised. This feature e na­
bles used car buye rs to make su re they have re­
ceived all of the keys.
If you are given only two keys, for instance, you
should take the veh icle and the existing keys to
an authorized Audi dealer to have the missing key
disabled. It is also important to notify your insur­
ance company about the loss.
Setting the speed warning
By pressing the ISETI button briefly, you can set
threshold 1 of the speed warning wh ile you are
driv ing
¢page 88. By ma intaining pressure on
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9:::1: Engine oil pressure
The red engine oil pressure warning symbol re­
quires immediate service or repair . Driving with a
low-oil-pressure indication is likely to inflict se ­
vere damage to the engine.
• Turn off engine! Oil pressure too low
If the indicator lig ht t urns on and the message
appears, the oi l pressu re is too low.
~ P ull off the road.
~ Stop t he vehicle .
~ Turnoff the engine.
~ Check the engine oil level¢ page 207 .
~ If the engine oil leve l is too low, add engine oi l
¢
page 207 . Make sure that t he oil pressure
warning symbol. appears no longe r in the
display before you s ta rt driving ag ain.
~ If the engi ne oil leve l is cor rect and t he i ndic a­
tor lig ht still tur ns on, turn t he eng ine
off and
do not continue driving . Seek p ro fessional as ­
s istance .
(D Tips
- The engine oil pressure symbol. is not
an indicator for a low engine oil level. Do
not rely on it. Instead, check the oil level in
your engine at regular intervals, preferably each time you refuel, and always before
going on a long trip.
- The yellow oil level warning indication
Ill
requires oil refill or workshop service with ­
out delay . Do not wait until the red oil
pressure warning. starts to flash before
you respond to the low oil level warning
Ill . By then , your engine may already have
suffered serious damage .
~ . Engine oil level
• WARNING: Please add oil immediately
If the indicator lig ht and the message ap pear,
a dd engine o il i mm edi ate ly
¢page 205.
;:; Ill Add oil, max XX XX l. You may cont. driv .
0
~ When the symbol II and driver message appea r, ,....,
~ add the amount of oi l appea ring in the display at
:;;: the next opportunity¢
page 205. ,....,
Instruments and ind icator lights
-L Eng ine cooling system
A malfunction in the engine cooling system must
be repaired as soon as possible .
• Turn off engine and check coolant level
If the indicator light turns on and the message
appea rs, the coo lant tempe rat ure is too high o r
t h e coo lant leve l is too low.
~ Pull off the ro ad.
~ Stop the vehicle.
~ Tur noff th e engine.
~ Check coolant leve l¢ page 209 .
~ Add coolant if necessary¢ page 210.
~ Continue dr iv ing only afte r the e ngine coolant
warni ng/ indicator light goes out .
~ Contact your authorized Audi dealer for assis-
t ance if necessa ry.
If the engi ne coo lant level is correct , then t he ra ­
dia to r f an may be the cause of t he mal func tion.
• Coolant temperature! Let engine run with
vehicle stationary
If the indicator lig ht tur ns on and the messa ge
appea rs, let the engine run a t idle for a few mi ­
nutes to c ool down.
A WARNING
-- If yo ur vehicle should break down for me ­
cha nica l o r ot her reasons, park at a safe dis­
t ance from mov ing t raff ic, t urn off t he e n­
g in e a nd turn on the haz ard warning lights
¢ p age S O, Em ergency fla she rs.
- N ever open t he hood if you see o r hear
s te am or coo lant esca p in g fr om th e engine
co mpartm ent - you ris k being scald ed . W ait
un til yo u can no longe r see or hear steam or
coo lant escapin g.
- T he engine co mpart ment of an y vehicl e is a
d anger ous are a. B efore y ou perfo rm any
wo rk in the eng ine com partment, t urn of
the eng ine a nd a llow it to cool. Follow t he
warn ing stickers
¢page 203.
(D Note
Do not con tinue dr iv in g if the . symbol i llu-
minates. The re is a malf u nction in the engine
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Warm and cold
Warm and cold
Climate control system
Description
The climate control system warms, cools and
adds humidity to the air in the veh icle inter ior. It
is the most effective when the windows and sun ­
roof are closed. If there is a build-up of heat in­
side the vehicle, ventilation can help to speed up
the cooling process.
I n all heating mode functions except
defrost, the
b lower only switches to a higher speed once the
engine coolant has reached a certain tempera­
ture .
Condensat ion from the cooling system can drip
and form a puddle of water under the veh icle.
This is normal and does not mean there is a leak.
P ollutant filt er
The pol lutant filte r removes pollutants such as
dust and pollen from the a ir.
The air pollutants filter must be changed at the intervals specif ied in your Warranty
& Mainte­
nance booklet, so that the a ir cond it ione r can
properly work.
If you drive your vehicle in an area with high air pollut ion, the filter may need to be changed
more frequently than specified i n your Aud i War­
ranty
& Maintenance booklet. If in doubt, ask
your author ized Audi Service Advisor for advice.
Ke y cod ed setting s
The climate control settings are automatically
stored and assigned to the remote control key
that is in use .
.8, WARNING
Reduced visib ility is dangerous and can ca use
accidents.
- For safe dr iv ing it is very impo rtan t that all
windows be free of ice, snow and condensa­
t ion .
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- Complete ly familiarize yourself with the
proper use and function of the heating and
ventilation system and espec ially how to de­
fog and defrost the wi ndows .
- Never use the windshield wiper/washer sys­
tem in freezing weather until you have
warmed the windshield first, using the heat­ ing and vent ilation system. The washer solu­
tion may freeze on the windshield and re­
duce visibi lity.
(D Note
- If you suspect that the air conditioner has
been damaged, sw itch the system off to
avoid further damage and have it inspected
by a q ualified dealership.
- Repa irs to the Aud i air cond itioner requ ire
special techn ica l know ledge and spec ial
tools. Contact an a uthorized Audi dealer fo r
assistance.
@ For the sake of the environment
By reduc ing the amo unt of fuel you use, you
also reduce the amount of pollutants emitted
into the a ir.
(D Tips
- Keep t he a ir intake slots (in front of the
windshield) free from ice, snow and debr is
in orde r to maintain the prope r funct ion of
the climate control system .
- The energy management sys tem may sw itch
the seat heating* o r rea r window defroster
off temporarily. These systems are available
again as soon as the energy balance has
been restored.
- Air escapes through vents under the rear
window. When placing items of clothing on
the luggage compartment cover, ensure
that the openings are not covered.

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 .
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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.

Driving
oil pressure must first build up in the hy­
draulic valve adjusters. This is normal and not a cause for concern.
- If you leave the vehicle with the ignition
switched on, the ignition will switch off af­
ter a certain period of time. Please note that
electrical equipment such as exterior lights
will switch off as well when that happens .
Switching engine off
Applies to veh icles: w ith conven ience key
" Bring your vehicle to a complete stop .
" Automatic transmission: Move the selector lev­
er to the P or N position.
"Press the
I STA RT ENG INE S TOPI button
~ page 83, fig. 99.
Steering lock
The steering locks when you turn the engine off
using the
I START E NGINE STOP ! button and
open the driver's door. The locked steering helps
prevent vehicle theft.
Emergency off
If necessary, the engine can be switched off with
the selector lever in the R or D/S positions . The
engine stops if you press and hold the
I STAR T ENGIN E STOPI button at speeds below
6 mph (10 km/h) and press the brake pedal.
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
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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.
(D Note
If the engine has been under heavy load for
an extended period, heat builds up in the en­
gine compartment after the engine is switch ­
ed off - there is a risk of damaging the engine .
Allow the engine to run at idle for about two
minutes before switching it off.
Driver messages
Ignition is on
This message appears and a warning tone sounds
if you open the driver's door when the ignition is
switched on .
No key identified
This message appears when the
I STAR T ENGINE ST OP ! button is pressed if there
is no master key inside the vehicle or if the sys­
tem does not recogni ze it. For example, the mas­
ter key cannot be recognized if it is covered by an
object (e .g . aluminum brief case) which
screens
the radio signal. Electronic devices such as cell
phones can also interfere with the radio signal.
Press brake pedal to start engine
This message appears if you do not press the
brake pedal to start the engine in a vehicle with
an automatic transmission.
Press clutch pedal to start engine
This message appears if you do not press the
clutch pedal to start the engine in a vehicle with
a manual transmission.
Shift to N or P to start engine
This message appears when attempting to start
the engine if the selector lever for the automatic
transmission is not in the P or N position . The .,_

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Tire pressure
When tow ing a tra ile r, infl ate the tires of yo ur
ve hicl e to the co ld tire press ure listed under "Fu ll
l oad" on the label located on the driver's side B­
pi llar (visib le when th e door is open). Inflate
tra ile r tir es to t railer and tire manufacture rs'
specifications.
Light s
The headlight settings should be checked wi th
the trai ler attached before driv ing
off . Check to
make sure both veh icle and trai ler lights are
wo rking prope rly .
Safety chains
Be s ure trai ler s afety chains are p ro p erly conne ct­
ed from the trailer to the hitc h on the vehicle .
L eave enough slack in the chains to permit turn­
ing corners . When you install safety cha ins, make
sure they w ill not drag on the road when yo u are
driving.
The chains s hou ld cross under the t railer tongue
to p revent it from dropp ing in case of separat ion
from t he hitc h.
Driving instructions
Driving with a trailer always requires extra core
and consideration.
To ob tain the best possible handling of vehicle
and trailer, please note the fo llowing :
.,. Do no t tow a lo ad ed t railer w hen yo ur car i tse lf
i s not lo ad ed.
.,. Be especia lly caref ul when passing ot he r
vehicles .
.,. Observe speed limits.
.,. Do not d rive at the maximum permissible
speed .
.,. Always apply brakes early .
.,. Moni to r th e temperature gauge .
Weight distribution
T owing a loaded trailer w ith an empty car res ults
in a high ly unstable distribution of weight . If this
cannot be avo ided, drive at very low speeds o nly
to avoid the risk of losing steering control.
Trailer mode
A "ba lanced" rig is easier to opera te and co ntrol.
This means that the tow vehicle sho uld be loaded
to the extent possib le and permissib le, w hile
keeping the trailer as light as possible under the
cir cumstances . Wheneve r poss ib le, transfer
some cargo to the luggage compartment of the
tow ve hicle while observing tongue load require­
ments and vehicle loa ding consi de rations .
Speed
The higher the speed, the mo re diff icult it be­
comes for the driver to control the r ig. Do not
drive at t he max imum permissib le speed. Reduce
you r sp eed even more if load, weathe r or wind
cond it ions are u nfavo rab le -pa rticularly when
go ing down hill.
Reduce vehicle speed
immediately if the trailer
shows the slightes t sign of sway ing .
Do not try
to stop the swaying by accelerating .
Observe speed limits . In some a reas, speeds fo r
vehicles towing trailers are lower tha n for regular
vehicles .
Always apply bra kes early . When d riving down­
hill, shift into a lower gear to use the e ngine
braki ng effect to slow the vehicle . Use of the
brakes alone can cause them to overhea t and fa il.
Coolant temperature
The coo lant tempe rature gauge c:> page 10 m ust
be obse rved caref ully. If the needle moves close
to the upper end of the scale, reduce speed im­
me diate ly and/or t urn
off th e a ir cond it io ne r .
If the coolant temperat ure warning light . in
t h e instr ument cluster starts flashing, pull
off
the road, stop and let the engine idle for about
two m inu tes to pre vent heat build -u p .
A WARNING ,.__ -
A nyone not prope rly restr ained in a moving
ve hicl e is at a m uch grea te r risk in an a cci ­
d ent. Never le t anyon e ride in your car w ho is
n o t pr ope rly we arin g th e res tra ints p ro vid ed
by Au di .
191

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Checking and Filling Hood
Releasing and opening the engine hood
The engine hood is released from inside the vehi­
cle.
Fig. 179 Driver's side footwell: engine hood re lease lever
... ~ - -
Fig. 1 80 Release lever under the engine hood
Before opening the engine hood, make sure that
the windshield wipers are flat against the w ind­
shie ld. Otherwise, they could damage the paint
on the hood.
.. Wi th the driver's door open, pu ll the leve r un­
der the instrument panel in the direction of the
arrow ¢
fig. 179 .
.. Raise the hood slightly¢&.
.. Press the rocker switch under the hood upward
¢fig . 180. 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 t he hood if yo u see or hear steam or
coolant esca ping from the eng ine compart­
me nt. Wait unt il no s team or coolant ca n be
Checking and Filling
seen or hea rd before carefully opening the
hood.
Closing the engine hood
.. Pull the hood down until the pressure from the
struts is reduced.
"' Le t the hood
drop down and latch in p lace. Do
not try to push it shut;
it may fail to engage
¢ &, .
A WARNING
A hood that i s not comple tely latched co uld
fly up a nd blo ck your view while driv ing.
- W hen you close the engine hood, check it to
ma ke sure the s afety catch h as prope rly en­
ga ged. The hood should be flush with t he
surroundi ng ve hicl e body pa rts.
- If you no tic e while driv ing t hat t he hoo d is
not secured properly, stop at once and close
it.
Working in the engine compartment
Be e specially careful whenever you work in the
engine compartment.
-
Whenever you mu st perform an y work in the
engine compartment, for example checking and
filling different fluids, there is a risk of injury, burn s and a ccidents. To prevent per sonal injury
always observe the following WARNINGS. The
eng ine compa rtment of any vehicle is a hazard ­
ous area
¢ .&. .
A WARNING
-~
To help avoid injury, before you check any­
th ing under the hood:
- Turn off the engine.
- Remove the ignition key .
- Apply the par king brake.
- Move selector leve r of autom atic t ransm is-
sion to "P" (Park); put manual transm ission
in Neutral.
- Always let the engine cool down. Ho t com ­
ponents w ill bur n skin on contact .
203