check engine AUDI A6 2015 User Guide

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Child safety lock for
the rear doors
The power child safety lock locks the rear win­
dows and prevent the rear doors from being
opened from the inside .
Fig. 30 Sectio n fr om driv er' s door : child sa fety lock
b uttons
• To activate the child safety lock for the left/
right rear door, press the left/right button
[!l
in the driver's door¢ fig. 30. The light in the
button w ill turn on.
• To deactivate the child safety lock for the
left/right rear door , press the left/right but­
ton [!] in the driver's door. The light in the
button turns off.
The following features are switched off:
- The interior door handles in the rear doors,
- The power windows in the rear doors .
In order to activate the ch ild safety lock on
the left and the right side , press the two safe­
ty buttons
[!l in succession .
Power windows
Controls
The driver can control all power windows.
Fig . 31 Sectio n of t he dr iv er 's d oor: Control s
Opening and closing 39
All power window switches are prov ided with
a two-po sition function :
Opening the windows
• Press the switch to the first stop and hold it
until the window reaches the desired posi­
tion.
• Press the switch briefly to the
second stop
to automatically open the window.
Closing the windows
• Pull the switch to the first stop and hold it
until the window reaches the desired posi­
tion.
• Pull the switch briefly to the
second stop to
automatically close the window.
Power window switches
@ Driver's door
® Passenger's door
© Left rear door
@ Right rear door
& WARNING
-When you leave your vehicle -even if on ­
ly briefly -always take the ignition key
with you . This applies particularly when
children remain in the vehicle. Otherwise
the children could start the engine or op­
erate electrical equipment (e .g . power
windows). The power windows are func­
tional until the driver's door or passeng­
er's door has been opened.
- Be careful when clos ing the w indows .
Check to see that no one is in the way, or
serious injury could result!
- When locking the vehicle from outside,
the vehicle must be unoccupied since the
windows can no longer be opened in an
emergency.
(D Tips
After the ignition has been switched off,
the windows can still be opened or closed
for about 10 minu tes. The power windows
are not switched off until the driver's door
or passenger's door has been opened.

7 4 On the road
column will continue moving as long as you
are pressing the switch.
There must be at least 10 inc hes (25 cm) be­
tween you r chest and the center of the steer ­
ing whee l.
If you cannot sit more than 10 in­
ches (25 cm) from the steering whee l, see if
adaptive equipment is available to help you reach the pedals and increase the distance
from the steer ing wheel.
F or detai led information on how to adjust the
driver's seat, see
<::> page 53 .
In vehicles with the memory f unction* , the
steering column settings are stored together
with the seat position.
A WARNING
Improper use of steering wheel adjust­
ment and improper seating position can
cause se rious personal injury.
- Adjust the steer ing whee l column on ly
when the vehicle is not moving to pre­
vent loss of veh icle control.
-
- Adjust the driver's seat or steering wheel
so that the re is a min imum of 10 inches
(25 cm) between your chest and the
steering wheel ¢
page 12 7, fig. 144. If
you can not maintain this min imum dis­
tan ce, the airbag system cannot protect
yo u properly.
- If phys ica l limi tations prevent you from
sitting 10 in ches (25 cm) o r more from
the steering wheel, check with yo ur au­
tho rized Aud i dealer to see if adaptive
equipment is availab le .
- If the steering wheel is aligned with you r
face, the supp lemental drive r's airbag
cannot provide as much protect ion in an
acc ident. A lways make sure that the
steering wheel is aligned with your
chest.
- Always hold the steering wheel with your
hands at the 9 o'clock and 3 o'clock posi­
t ions to reduce the risk of pe rsonal injury
if the d river 's airbag deploys.
- Never hold the steering whee l at the 12
o'clock posit ion or w ith your hands i nside the steering wheel rim or on the steering
wheel hub. Hold
ing the steer ing wheel
the wrong way can cause serious injuries
to the hands, arms and head if the driv­
er 's airbag deploys.
Easy entry feature
Applies to vehicles: with electrically adjustable steering
wheel
The easy entry feature makes it easier to en­
ter and exit the vehicle by automatically ad­
justing the steering wheel.
.. Select in the MM I: ICARI function button>
(Car )* sys tem s control b utton > V ehicle set­
ting s
> Seats > D rive r's seat > Easy entry >
On .
When the easy ent ry feature is turned on, the
steering wheel moves up to the park position
when you switch
off the ignition. After you en­
ter the veh icle, the steering wheel moves to
the stored position as soon as you sw itch on
the ignit ion.
Starting and stopping
the engine
Starting the engine
This button switches on the ignition and
starts the engine.
Fig . 77 Center console: S TART ENGINE S TOP butto n
Switching the ign ition on /off
.. To switch the ign ition on/off, press the
I STAR T ENGINE ST OPI button . Do not press
the brake pedal while doing this . Diesel
veh icles are preheated while the ignit ion is
sw itched on .
lilJ,

80 On the road
lever position and take your foot off the brake
pedal.
If you select the R position during a Stop
phase, the engine will start again.
Shift from
D to P quickly to prevent the engine
from starting unintentionally when shifting
through
R.
You can determine for yourself if the engine
will stop or not by reducing or increasing the
amount of force you use to press the brake
pedal. For example, if you only lightly press
on the brake pedal in stop-and and-go traffic
or when turning, the engine will not switch off
when the vehicle is stationary. As soon as you
press the brake down harder, the engine will
switch off.
General information
App lies to vehicles: with Start-Stop-System
The standard Start-Stop-mode can be cancel­
led for different system-related reasons.
Fig . 81 Instrument cluster: engine -Stop tempo rarily
unava ilable
Engine will not switch off
Before each stop phase, the system checks if
certain conditions have been met. For exam·
ple, the engine will
not be switched off in the
following situations:
- The engine has not reached the minimum
required temperature for Start-Stop-mode.
- The interior temperature selected by the A/C
system has not been reached.
- The outside temperature is extremely high/
low .
- The windshield is being defrosted
¢ page 69, ¢ page 71.
-The parking system* is switched on.
- The battery charge level is too low.
- The steering wheel is sharply turned or
there is a steering movement.
- After engaging the reverse gear .
- On sharp inclines.
The
fjJ indicator light appears in the informa­
tion line in the instrument cluster display
¢fig . 81.
Engine automatically restarts
The stop phase is interrupted in the following
situations, for example. The engine restarts
without any action by the driver.
- The interior temperature varies from the
temperature selected in the A/C system.
- The windshield is being defrosted
c:!;> page 69, ¢ page 71.
-The brake pedal is pressed several times in a
row.
- The battery charge level becomes too low.
- High power consumption.
Switching the ignition off automatically
To prevent the battery from draining, the igni­
tion will switch off
automatically when all of
the following conditions have been met :
- The vehicle has already been driven.
- The engine has been turned off by the Start-
Stop-System*.
- The driver's door is opened.
- The driver's seat belt is removed .
- The brake pedal is not pressed down.
- The vehicle is stationary.
In this case, the activated low beam will be re­
placed by the side marker lights. The side
marker lights will switch off after approxi­
mately
30 minutes or when you lock the vehi­
cle.
If the Start-Stop System has
not turned off
the engine or if you have switched the Start­
Stop system off manually, the ignition will
not
be automatically switched off and the engine
will continue to run
c:!;> ,&. .,..

110 Automatic Tran sm iss ion
multitronic transmission : Your vehicle is
equipped with
hill hold assist allowing you to
start while on an incline. The system is acti­
vated when the brake pedal is pressed down
and held
f o r a few s econds . The brake pres­
sure will hold for
a moment after the brake
pedal loosens to prevent the veh icle from roll­
ing backwards whi le starting up .
A WARNING
- The veh icle can also roll when the engine
is stopped.
- Unintended veh icle movement can cause
serious injury .
- Never leave your vehicle with the eng ine
running wh ile in gea r. If you must leave
yo ur vehicle when the engine is running,
act ivate the park ing brake and move the
selector lever to P .
- Power is st ill transmitted to the whee ls
when the engine is running at idle . To
prevent the vehicle from "creeping", you
must keep your foot on the brake when
the engine is running and the selector
lever is in D/S or R or "tiptronic" mode is
selected.
- Do not press the accelerator pedal when
changing the selector lever pos ition
wh ile the vehicle is stat io nary and the
engine is running .
- Never shift into R or P wh ile driving .
- Before driv ing down a steep slope, re-
duce your speed and shift into a lower
gear with "tiptronic" .
- Do not ride the brakes or press the brake
pedal too often or too long when dr iving
down a hill. Constant braking causes the
brakes to overheat and substant ially re­
duces b raking performance, inc reases
braking distance or causes comp lete fail­
ure of the brake system.
- T o prevent the veh icle from rolling back
when stoppi ng on incl ines, always hold it
in place with the brake peda l or parking
brake.
- Never hold the veh icle on an incl ine with
a slipping clutch. The clutch opens auto ­
matically when it becomes too hot from the overload. An indicato
r lamp
ml illu­
minates and a driver message appears
¢ page 112 when the clutch is overload­
ed.
- If the engine must remain running, never
have any driving posit io n engaged when
checking under the hood . Make sure the
selector lever has securely engaged and is locked in P w it h the park ing brake set
¢ page 222 . Otherwise, any increase in
eng ine speed may set the vehicle in mo­
tion, even with the parking brake ap­ plied .
(D Note
-S tronic- and tiptronic transmission :
When stopping on an incl ine , do not try
t o hold the vehicle in place by pressing
the acce lerator pedal while a driving gear
is se lected. This can cause the transmis­
sion to overheat and can damage it. Acti­
vate the parking brake or press the brake
peda l to prevent the vehicle from roll ing.
- S tronic- and tiptronic transmission : A l­
lowing the vehicle to ro ll when the en­
gine is stopped and the selector lever is
in N will damage the transmission be­
cause it is not l ubricated unde r those cir­
cumstances.
{!) Tips
For safety reasons, the parking brake is re­
l eased automatically only when the d riv­
er's safety belt is engaged in the buckle.
Hill descent control
The hill descent control system assists the
driver when driving down declines.
Hill descent contro l is activated when these ­
lector lever is in D/S and you press the brake
pedal. The transmission automatically selects
a gear that is su itable fo r the incline. H ill de­
scent contro l tries to ma inta in the speed ach­
ieved at the time o f braking, within phys ica l
and technical limitations. If may sti ll be nec -
essary to adj ust the speed with the brakes . ..,..

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Intelligent technology 195
Switching on and off
ESC turns on automatically when you start the engine.
Fig. 178 Center console,:, OFF button
ESC levels
Sport mode on
The following situations are exceptions where it may be useful to switch on sport mode to
allow the wheels to spin:
- Rocking the vehicle to free it when it is stuck
- Driving in deep snow or on loose ground
- Dr iv ing with snow chains
Sport mode off
Behavior
The ESC and ASR stabilization functions The fu ll stab ilizat ion function of the ESC
are limited¢ ,&.
Operation Press the I~ OFFI button .
Indicator II turns on.
lights
Driver mes- Stabilization control (ESC): Sport
sages Warning! Reduced stability
A WARNING
You should only switch sport mode on if
your dr iving abilities and road conditions
permit.
- The stabilization function is limited
when sport mode is sw itched on . The
dr iv ing wheels could spin and the vehicle
cou ld swerve, especially on slick or slip­
pery road surfaces.
@ Tips
Sport mode cannot be switched o n when
adapt ive cru ise control* is sw itched on.
Braking
General information
What affects braking efficiency?
-
Operating conditions and driving habits
The brakes on today's automobiles are st ill
subject to wear, depending largely on operat­
in g conditions and driv in g habits ¢.&,. . On and
ASR is available again.
Press the
I S'} OFF I button again.
Iii turns off.
Stabilization control (ESC): On
vehicles that are either driven mostly in stop­
and-go city traffic or are driven hard, the
brake pads should be checked by your author­
ized Audi dealer more often than specified in
t he
Warranty & Maintenance booklet . Failure
to have your brake pads inspected can result
in reduced brake performance .
On steep slopes, you should use the braking
effect of the engine. This way, you prevent un­
necessary wear on the brake system. If you
must use your brakes, do not hold the brakes
down cont inuous ly. Pump the brakes at inter­
vals.
Moisture or road salt
Under certain cond itions, for example, when
driving through water or very heavy rain, or
even after washing your veh icle, the braking
effect can be reduced due to moisture (or in
freezing conditions ice) on the brake pads. A
few careful brake applications should dry off
the brake pads or remov e any ice coatings. .,._

196 Intellig ent technolog y
When you are driving at higher speeds with
the windshield wipers on, the brake pads will
briefly touch the brake d iscs in regular inter­
vals so as to improve reaction t ime when brak­
ing on wet surfaces. You the driver will not no­
tice anything .
The effectiveness of the brakes can be reduced
when the vehicle is dr iven on a salt-covered
road and the brakes are not used. Here too,
you should clean
off accumulated salt coat ing
from brake d iscs and pads with a few careful
applications of the brake¢.&. .
Cor ro sion
There may be a tendency for dirt to build up
on the brake pads and corrosion to form on
the discs if the car is not dr iven regularly or
only for short trips with l ittle use of the
brakes .
If the brakes are not used frequently, or if cor­ rosion has formed on the discs, it is advisable
to clean
off the pads and discs by braking
firm ly a few times from a mode rately high
speed ¢.& .
Faults in the brake system
If you should notice a sudden increase in
brake pedal travel, then one of the two brake
circu its may have failed¢.&. .
Low brake fluid le vel
Malfunct ions can occur in the brake system if
the brake fluid level is too low. The brake fluid
level is monitored electronically .
Brake boost er
The brake booster works with vacuum pres­
sure which is created only when the engine is
running ¢ .&. .
Brake lining w ear status
Brake lining wea r may be checked by vis ual in ­
spection of the condition of the brake pads
through the openings in the whee l. If neces­
sary, the whee l may be removed for this in ­
spection
¢ page 272, Changing a wheel.
_& WARNING
- You shou ld perform braking maneuvers
for the purpose of cleaning the brake
system only if road conditions permit .
Other road users must not be put at risk -
you may ca use an accident!
- Before descend ing a steep grade, reduce
speed and sh ift transmission into a lower
gear o r lower dr iving range. Do not ride
the br akes or ho ld the pedal down too
long o r too often . Th is could cause the
brakes to get hot and diminish braking
efficiency .
- Do not "ride the brakes" by resting your foot on the pedal when you do not intend
to brake. This may cause the brakes to
overheat, premature wear and increased
stopping distance.
- Under certain climatic and ope rat ing
conditions such as passing through wa­
ter , dr iving in heavy rain or after washing
the vehicle, the effectiveness of the b rakes can be reduced . In winte r, ice can
accumu late on the bra ke pads, lin ings,
d iscs and drum s. Carefully app ly bra kes
for a test. Brakes will dry and ice coa t­
ings wi ll be cleaned
off after a few care­
fu l brake applicat ions.
- Driving for an extended period of t ime on
salt -covered roads without using your
brakes can a lso affect braking efficiency .
Clean
off accum ulated salt coating from
brake discs and pads with a few careful
brake applications.
- If you damage the front spoiler, or if you
install a different spoiler, be sure the a ir
f low to the front brakes is not obstruct­
ed. Otherwise the brake system could
overheat reducing the effective ness of
the entire brake system.
- Failure of one brake circuit will impa ir
the braking capab ility result ing in an in­
creased stopping distance . Avoid driving
the vehicle and have it to wed to the near­
est A udi dealer or qualif ied workshop .
- Never let the vehi cle roll to a s top with
the eng ine shut
off.

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Avoid damaging the
vehicle
When you are driving on poor roads, or over
curbs, steep ramps, etc., make certain that
low-lying parts such as spoilers and exhaust
system parts do not bottom out and get dam­
aged.
This is especially true for vehicles with low­
slung chassis (sports chassis) * and fully load­
ed veh icles.
Driving through water
on roads
Note the following to avoid vehicle damage
when driving through water, for example on
flooded roads:
- T he water must not be any h igher than the
bottom of the veh icle body.
- Do not d rive faster than wa lking speed.
..&, WARNING
After driving through wate r, m ud, slush,
etc., the brakes may be slow to take effect
because o f wet brake rotors and pads . Dry
the brakes first by braking carefully to re­
store the full braking effect.
(D Note
- Vehicle components such as the eng ine,
transmission, suspension or e lectrical
system can be severely damaged by driv­
ing thro ugh water.
- Always switch
off the Start-Stop-System
when driving through water¢
page 79 .
@ Tips
-Check the depth o f the wate r before driv ­
ing through it.
- Do not s top the veh icle, dr ive i n reverse
or switc h the engine off when driving
through water.
- Keep in mind that oncom ing vehicles
may create waves that raise the water
l eve l and make it too deep for you r vehi­
cle to drive through safely .
-
Dri vin g and en vironm ent 201
- Avo id driving through salt wate r because
it can cause corrosion .
Catalytic converter
Applies to vehicles: w ith gasoline engine
It is very important that your emission con­
trol system (catalytic converter) is function­
ing properly to ensure that your vehicle is run­
ning in an environmentally sound manner.
... Always use lead-free gasoline ¢ page 214,
Fuel supply.
... Never run the tank down all the way to emp­
ty.
.,. Never put too much motor o il in your engine
¢ page 226, Adding engine oil~-
... Never try to push- or tow-sta rt your vehicle.
The catalytic converter is an efficient "clean­
up" dev ice bui lt into the exhaust system of
the ve hicle. The cata lytic conve rter bu rns
many of the pollutants in the exha ust gas be­
fore they are re leased into the atmosphere .
The exclusive use of unleaded fuel is c ritically
important for the life of the ca talyt ic convert­
er and proper f unct ion ing of the engine.
A WARNING
The temperature of the exhaust system is
high, both when driving and after s topping
the engine.
- Never touch the exhaust tail pipes once
they have become hot . This cou ld result
in burns .
- Do not park or operate the vehicle in
areas where the hot exha ust system may
come in contact with dry grass, brush,
fue l spill or other material which can
cause a fire.
- Do not apply additional undercoating or
rustproof ing on or near the exhaust
manifold, exhaust pipes, catalytic con­
verter or heat shields . Dur ing driv ing, the
substance used fo r undercoating could
overheat and cause a fire.
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@ Tips
The consumption estimates as published by ENVIRONMENTAL PROTECTION AGENCY (EPA) and Transport Canada may not corre­
spond to your actual consumption on the
road, wh ich will vary depend ing upon vehi­
cle load and speed, road and weather con­
ditions, tr ip length, etc.
Drive smoothly and keep a lookout
ahead
Vehicles use the most fuel when they are ac­
celerating.
~ Avoid unnecessary accelerating and braking.
Vehicles use the most fuel when they are ac­
celerating . If you anticipate what is go ing to
h appen next, you will need to brake less and,
thus , accelerate less . Let the vehicle coast
wheneve r poss ible -fo r example when you see
that the nex t traffic light is red.
Avoid full throttle
Driving at moderate speeds saves fuel and
improves your mileage.
~ T ry and keep well below your car's max imum
speed.
Accelerating gent ly reduces fuel consump­
tion, engine wear, and does not disturb the
environment .
Fuel consumption, exhaust emissions and en­
g ine no ise increase d ispropo rtionately at high
speeds . If you dr ive at approximately three
quarters of top speed, fue l consumption will
be red uced by one ha lf. Never dr ive faste r
than the posted speed limit and wea ther con­
d itions permit.
Reducing unnecessary idling
E ven when your car is just idling it burns up
fuel .
~ Shut the engine off when you are not dr iv ing
the vehi cle.
Dri vin g and en vironm ent 203
~ Do not warm up the vehicle by lett ing the
engine run at id le .
T he id ling phase is au toma tic ally red uced for
vehicles with the Start -Stop -System . It is eff i­
cient to switch off the engine in vehicles with­
out the Start-Stop-System when stopp ed at
railroad crossings and long red lights. Turning
the engine off for jus t 30-40 seconds saves
more fuel than is burned by start ing the en-
. . gme again .
It takes a long t ime for the engine to warm up
fully when it is run ning at id le. However, wear
and noxious emissions are especia lly high
when the engine is warm ing up . So you should
dr ive away as soon as you start the engine and
avo id running at high rpms whi le the engine is
sti ll warming up.
(L} Note
Do not leave eng ine idling unattended af­
ter start ing .
If wa rni ng lights sho uld come
on to indicate improper ope ration, t hey
wo uld go unheeded . Extended idlin g also
produces heat, wh ich could res ult in ove r­
heating or other damage to the veh icle or
other p roperty .
Regular maintenance
A badly tuned engine unnecessarily wastes a
lot of fuel.
~ Have your ve hicle servi ced at reg ular i nter-
vals .
By havi ng your ve hicle regu la rly se rviced by an
Audi dealer he lps to ensu re tha t it ru ns prop­
erly and economically . The condition of your
vehicle not on ly affects its safety and ability to
ho ld its va lue, it a lso affects
fuel consump­
tion .
Check your oil e ach time you fill your tank.
T he amou nt of oi l used is re lated to engine
load and speed.
It is normal for the oil consumption of a new
engine to reac h its lowest value after a certa in
mileage has been d riven . .,..
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Trailer towing Driving with a trailer
General information
Your Audi was designed primarily for passen­
ger transportation .
If you plan to tow a tra iler, p lease remember
that the addit ional load will affect durab ility,
economy and performance .
Trailer towing not on ly places more stress on
the vehicle, it also calls for more concentra­
tion from the driver.
F or this reason, a lways fo llow the operating
and driving instructions provided and use
common sense.
(D Note
If you are going to tow a trai le r, you must
ac tivate the trailer operation mode
c::> page 205, Operating instructions.
Technical requirements
Trailer hitch
Use a weig ht-carrying hitch conforming to the
gross trailer we ight. The hitch must be suita­
b le for your veh icle and trailer and must be
mounted secure ly on t he ve hicle's chassis at a
technically sound location . Use only a trail er
hi tch w ith a removab le ball moun t. A lways
check wi th t he tra ile r hi tch man ufactur er to
make sure that you are using the cor rect
h itch.
Do not us e a bumper hitch.
The hitc h m ust be installed in such a way that
i t does not interfe re with the impac t-absorb­
i ng bumper syst em. No mod ificat ions should
b e made to the vehi cle e xhaus t and br ake sys­
tems . From t ime to time, check th at a ll hitc h
mo unt ing bo lts rem ain securely fas tened.
When you are not towing a trail er, remove the
tra ile r hi tch ball moun t. T h is prevents the
hi tch from causing damage sho uld your ve hi­
cle be str uck from behind~ .& .
Trailer towin g 205
Trailer brakes
If your trailer is equippe d wi th a bra king sys­
tem, check to be s ure that i t conforms to all
regulations .
T he trailer hyd ra u lic bra ke sys tem mus t not be
d irec tly connec ted to the vehicle's hydraulic
brake system .
Safety chains
Always use safety chains be tween your ve hicle
and t he tra ile r.
Trailer lights
Trai ler lights must meet all reg ulations. Be
su re to c heck with your Audi dea ler for correct
wir ing, switches and relays .
Mirrors
If you a re unable to see the traffic behind you
u sing the regula r outside mirrors, then you
must insta ll extended mir rors. It is important
t h at you
always have clea r vis io n to the rear.
_&. WARNING
-
Afte r removi ng the t railer hitch , do no t
stor e it in yo ur v ehicl e. In case of sudden
b raki ng, the hi tch co ul d fly forwar d and in­
j ur e you o r yo ur pass enge rs.
Operating instructions
Maximum trailer weight
A tra ile r fo r you r vehi cle is l imited to a typi cal
cla ss 1 o r class 2 tr ailer.
Trailer load distribution
Be sure the load in the tra ile r is held secure ly
in place to p revent it from shift ing fo rward,
ba ckward or sideways.
Never allow a passenger to ride in a trailer
c::> .& in Driving instructions on page 207 .
Eng ine cooling sy stem
Towing a t railer ma kes the engine wor k hard­
er . It is impo rtant that the cooling system's
performance is up to the additional load.
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-Blend must contain not more than 15%
MTBE.
Seasonally adjusted gasoline
Many gasoline grades are blended to perform
espec ially we ll for winter or summer driving.
During seasonal change-over, we suggest that
you fill up at busy gas stat ions where the sea­
sonal adjustment is more likely to be made in
time .
(D Note
-Methanol fuels which do not meet these
requirements may cause corrosion and
damage to plastic and rubber compo­
nents in the fuel system .
- Do not use fue ls that fail to meet the
specified criter ia in this chapter.
- If you are unable to determine whether
or not a particular fue l blend meets the
specifications, ask your service station or
its fuel supp lier.
- Do not use fuel for which the contents
cannot be identified.
- Fuel system damage and performance
problems resulting from the use of fuels
different from those specified are not
the responsibility of Audi and are not
covered under the New Vehicle or the Emission Control System Warranties.
- If you experience a loss of fuel economy
or driveability and performance prob­ l ems due to the use of one of these fuel
blends, we recommend that you switch
to unblended fuel.
Gasoline additives
A major concern among many auto manufac­
turers is carbon deposit build- up caused by
the type of gasoline you use.
Although gasoline grades differ from one manufacturer to another , they have certain
things in common. All gasoline grades contain
substances that can cause deposits to collect
on vital engine parts, such as fuel injectors
and intake valves. Although most gasoline brands include additives to keep engine and
Fuel supply and filling your fuel tank 215
fuel systems clean, they are not equally effec ­
tive .
A udi recommends using TOP TIER Detergent
Gasoline. For more info rmation on TOP TIER
Detergent Gasoline, please go to the official
website (www.toptiergas.com).
After an extended period of using inadeq uate
fuels, carbon deposit build-ups can rob your
engine of peak performance.
Q) Note
Damage or malfunction due to poor fue l
quality is not covered by the Aud i New Ve­
hicle Limited Warranty.
Diesel fuel
Applies to veh icles: w ith diese l eng ine
Always use ULSD (Ultra Low Sulfur Diesel)
No. 2. The ULS D No. 2 meets the ASTM D975.
D iesel fuel w ith concentrations of biodiese l
highe r than 5 % such as Bll, B2O or BlOO are
strictly prohib ited.
Serv ice stat ion fuel pumps are labeled with
the correct fuel informat ion for easy recogn i­
t ion by the user. If the diesel fuel pump is not
labeled ask the station operator what fuel is
being dispensed before filling up your vehicle.
ULSD No. 2 may not be available outside the
USA and Canada. Be sure to check before trav­
eling to other countries.
ULSD No. 2 can become thicker in very cold
temperatures, and this can impair the en­ gine's start ing and running. Depending on the
season, gas stat ions provide ULSD No. 2 that
flows better in cold temperatures so that you
can continue operating your vehicle as usua l.
(D Note
-Your vehicle's diesel engine was de­
signed soley for use with ULSD No. 2.
Th erefore, never use gasoline, heating
oil, other f uels or flow improvers . These
contain substances that wi ll severely
damage the fuel system and the engine. .,.
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