low oil pressure AUDI Q5 2014 Owners Manual

Trailer hitch ................... . .
Error messages
Homelink ................ ... . .
Universal remote control .......... .
Safety first ................... .
134
134
135
135
139
Dri ving Safely . . . . . . . . . . . . . . . . . 139
General notes . . . . . . . . . . . . . . . . . . . . 139
Proper occupant seating positions . . . 140
Pedal area . . . . . . . . . . . . . . . . . . . . . . . 144
Stowing luggage . . . . . . . . . . . . . . . . . 145
Reporting Safety Defects . . . . . . . . . . . 146
Safety belts . . . . . . . . . . . . . . . . . . . 149
General notes . . . . . . . . . . . . . . . . . . . . 149
Why safety belts? . . . . . . . . . . . . . . . . 150
Safety belts . . . . . . . . . . . . . . . . . . . . . 152
Safety belt pretensioners . . . . . . . . . . 155
Airbag sy stem .......... ... ... . 157
Important things to know . . . . . . . . . . 157
Front airbags . . . . . . . . . . . . . . . . . . . . 161
Monitoring the Advanced Airbag
System . . . . . . . . . . . . . . . . . . . . . . . . . 168
Side airbags . . . . . . . . . . . . . . . . . . . . . 172
Side curtain airbags . . . . . . . . . . . . . . . 175
Child Safety ................. . .
Important things to know ........ . .
Child safety seats ......... .... .. . .
Installing a child safety seat .. .. .. . .
LATCH Lower anchorages and tethers
for children .... .. .. ...... .. .. .. . .
Additional Information
Vehicle operation ....... .. .. . .
Intelligent technology .. .. . .. .
178
178
184
188
191
196
197
197
Notice about data recorded by vehicle
control modules . . . . . . . . . . . . . . . . . . 197
Electronic Stabilization Control (ESC) . 197
Brake system . . . . . . . . . . . . . . . . . . . . 200
Electromechanical power assist,
Dynamic steering . . . . . . . . . . . . . . . . . 201
Driving with your quattro . . . . . . . . . . 202
Energy management . . . . . . . . . . . . . . 203
Table of contents 3
Driving and environment . . . . .
205
The first 1,000 miles (1,500 km) and
afterwards . . . . . . . . . . . . . . . . . . . . . . 205
Catalytic converter . . . . . . . . . . . . . . . . 206
Diesel particulate filter . . . . . . . . . . . . 206
Avoid damaging the vehicle . . . . . . . . . 207
Shutting down vehicle . . . . . . . . . . . . . 207
Operate your vehicle economically and
min imize pollution . . . . . . . . . . . . . . . . 207
Driving off road . . . . . . . . . . . . . . . 210
Driving in difficult road conditions and
offroad . . . . . . . . . . . . . . . . . . . . . . . . . 210
Trailer towing . . . . . . . . . . . . . . . . . 213
Driving with a trailer . . . . . . . . . . . . . . 213
Trailer towing tips . . . . . . . . . . . . . . . . 215
Vehicle care . . . . . . . . . . . . . . . . . . . 217
Vehicle care and cleaning . . . . . 217
General information . . . . . . . . . . . . . . 217
Car washes . . . . . . . . . . . . . . . . . . . . . . 217
Cleaning and care information . . . . . . 218
Fuel supply and filling your
fuel tank . . . . . . . . . . . . . . . . . . . . . . .
222
Fuel supply . . . . . . . . . . . . . . . . . . . . . . 222
Fuel tank. . . . . . . . . . . . . . . . . . . . . . . . 225
Selective catalytic reduction . . . . . . . . 228
Checking and filling . . . . . . . . . . . 231
Engine hood . . . . . . . . . . . . . . . . . . . . . 231
Engine compartment . . . . . . . . . . . . . . 233
Engine oil . . . . . . . . . . . . . . . . . . . . . . . 233
Engine cooling system . . . . . . . . . . . . . 238
Brake fluid . . . . . . . . . . . . . . . . . . . . . . 241
Battery . . . . . . . . . . . . . . . . . . . . . . . . . 242
Windshield/headlight washer
container . . . . . . . . . . . . . . . . . . . . . . . 246
Tires and wheels . . . . . . . . . . . . . . 247
T ires . . . . . . . . . . . . . . . . . . . . . . . . . . . 247
Tire pressure monitoring system . . . . 265
•
•

28 Driver information d isplay
The ignition key can on ly be removed with the
selector in this position. This and other mes­
sages are brought up if a function cannot be
carried out.
Driver messages and red symbols
If a red symbol appears in the display, a driver
message is a lso displayed automatica lly.
F or example, the symbol fo r a problem with
engine o il pressu re . appea rs in the display .
The following message appears :
Turn off engine! Oil pre ssure too low
The driver message in the display goes out af­
ter about
5 seconds. The dr iver message can
be d isplayed again by briefly pressing the
ISETlbutton
c::> fig. 22 .
Driver messages and yellow symbols
If a yellow symbol appears in the display, a
driver message is also displayed automat ical­
ly .
For examp le, the symbol
B appears in the
d isplay, ind icating low w indshield washer flu­
id level. The follow ing message also appears:
Please refill washer fluid
The driver message disappears after a few
seconds. The driver message can be disp layed
again by briefly pressing the !SE T! button .
Red symbols
A red symbol means DANGER.
Fig . 23 D isplay: Danger symbo l
.. Pull off the road.
.. Stop the vehicle.
.. Turn off the engine. ..
Check the malfunctioning system. Contact
your authorized Audi dealer or a qualified
workshop for assistance.
Red symbo ls ind icate a priority 1 malfunction
- Danger!
With a priority
1 malfunction, a red symbol
appea rs in the upper center area of the dis ­
play
c::> fig . 23 . A driver message appears as
well to exp lain the ma lfunction in more de­
tai l. When this symbol appears,
three warning
tones sound in succession . The symbol contin ­
ues to flash until the fault has been corrected.
If
several priority 1 malfunctions are present,
the symbols appear in succession and remain
for about
2 seconds .
T he driver warning goes out after about
5 sec­
onds, but it can be brought up again at any
time by pressing the I SET I button
c} page 2 7.
Alter nator failure
c::> page29
Electromechan ical steering
c::> page 201
USA models: Brake system
malfunction
c::> page29
Canada models: Brake sys­
tem malfunction
c::> page29
En gin e coolant level too low/
engine coolant temperature
too high
c::> page 30
Engine oil pressure too low
c::> page 30
Refill engine oil now
c::> page 31
Refill Ad Blue*
c::> page 228
AdB lue ma lf unc tion*
c::> page 228
Steering malfunction
c::> page 31

30 Driver in formation d isplay
Audi dealer or other qualified workshop
and have the malfunction corrected.
_ t Engine cooling system malfunction
A malfunct ion in the engine cooling system
must be repaired as soon as possible .
If the . symbo l flashes in the d isplay, either
the eng ine coolant
temperature is too h igh or
the engine coolant
level is too low . A driver
m essage appea rs as we ll to exp lain the mal­
function in more detail. The driver warning
goes out after about 5 seconds, but it can be brought up at any time by press ing the
ISETI
button again .
Turn off engine and check coolant level
• Pull off the road.
• Stop the vehicle .
• Turnoff the engine.
• Check coolant leve l
c> page 239.
• Add coolant if necessary c> page 239 .
• Continue driving only after the eng ine cool ­
ant war ning/ indicato r light goes o ut.
• Co ntact you r autho rized Audi dea le r fo r as-
s istance if necessary .
If the engine coolant level is correct, then the r adiato r fan may be the cause of the malfunc­
tion .
.&, WARNING
-If your veh icle should break down for
mech anic al or other re asons, park at a
sa fe dis tance from moving traffic, turn
off the engine and turn on the hazard
wa rning lights ~
page 52, Emergency
flashers.
-
- Never open the hood if you see or hea r
steam or coolant escap ing from the en­
gine compartme nt -you risk being scald­
ed. Wait until you can no longer see or
hear steam or coo lant escaping .
- The e ngine compartment of any ve hicle
is a da ngerous a rea . Before you perform
any wor k in the engine compartment,
t ur n of the eng in e and allow it to cool.
Follow the wa rni ng sti cke rs ~
page 231.
(D Note
Do not continue dr iv ing if the . symbo l
ill um inates . There is a mal function in the
engine cooling system -you could damage
your engine.
"l:::r. Engine oil pressure malfunction
T he red engine oil pressure warning symbol
requires immediate service or repair. Driving with a low oil pressure indication is likely to
cause severe engine damage .
If the . symbo l on the disp lay flashes, the
engi ne oil pressure is too low. A driver mes­
sage appears as we ll to exp la in the malfunc ­
t io n in more detail. The dr iver warning goes
o ut afte r abo ut 5 seconds , but it can be
brough t up at any t ime by p ressing the
- IS- ET- I
butto n ag ain .
Turn off engine! Oil pressure too low
• Stop the vehicle.
• Turn the engine
off.
• Check the engine oil level c> page 236 .
• Contact your authorized A ud i dealer for as-
sistance if necessa ry.
Eng ine oil level too low
If the engine oil level is too low, add engine
o il
c>page 236 .
Engine oil level correct
If the symbol . flashes even tho ugh the en­
gine oil leve l is correct, please contact your
nearest authori zed Aud i Dea ler for assistance.
Do not continue dr iving . Do not leave the en­
gine ru nning
idle, either .
(D Tips
- The engine oil pressure symbol. is
not an indicator for a low eng ine oil lev­
el. Do not rely on it. Instead, check the
oil level in your engine at regular inter­
vals, preferably each time you refuel, and always before going on a long trip .
- The yellow oil level warning indication
II requires oil refill or workshop .,..

service without delay. Do not wait until
the red oil pressure warning. starts
to flash before you respond to the low
oil level wa rning
l!I. By then, your en­
gine may already have suffered serious
damage.
~ .. Fill engine oil now
WARNING: Pleas e add oil immediately
If the . symbol lights up, then the oil has to
be replenished r ight now ¢
page 236 .
@-Steering malfunction
If there is a malfunction in the electronic
steering column lock, the steering cannot be
unlocked.
If the . symbol in the display blinks, there
i s a malfunction in the electronic steering col­
umn lock . A driver message appears as well to
explain the malfunction in mo re deta il. The
d river war ning goes out after abou t 5 sec­
onds, but it ca n be b roug ht up at a ny time by
pr ess ing the
ISE TI bu tton aga in .
Steering defective! Do not drive vehicle! .. Contact your nearest a uthorized Audi dea ler .
.. Do not tow your vehicle .
A WARNING
-
Your vehicle mus t not be t owed in the
eve nt of a malfun ct ion in the electron ic
steeri ng colu mn lock because it can not b e
s t eered due to the l ocked s tee ring. If i t is
t owed w ith the stee ring loc ke d , t here i s
t he risk of an accident.
© -Ignition lock malfunction
A malfunction in the ignition lo ck mus t be re­
paired immediately.
If th e . symbol in the d isp lay blinks, there
i s a ma lfunction in the electronic ignit io n l ock.
A dr iver message a ppears a s well to exp la in
t he m alfu nction in more det ail. Th e d rive r
warn ing goes ou t after abou t 5 seconds, bu t it
Driver information display 31
can be b rou ght up a t any time by p ress ing the
ISETI bu tton again .
Ignition lock defective. Contact dealer!
.. Do not turn t he e ngine off .
.. Dr ive immedia tely to a n author ized Audi
de aler to have t he mal fun ct io n co rrected.
If there is a malfunct ion in the elect ro ni c ig ni­
t ion loc k, the igni tion ca nnot b e tu rned o ff.
D rive imm ed iate ly to an au tho rized se rv ice fa­
cili ty to have the cause of the malfunc tion co r­
re cte d.
On vehicles wi th Conven ienc e key*, the eng ine
s h ould not b e switched off using t he S tart/
St op butt on bec au se th e e ngine canno t be
s ta rt ed ag ain afte r th e ign iti on ha s been
swi tc h ed off.
Yellow symbols
A yell ow sym bol means WAR NING .
Fig. 24 Display : Yellow wa rning symbo l
Yellow sym bols indicate a prior ity 2 mal func ­
tion - Wa rning!
W hen a yellow war ning symbol a ppe ars,
one
warning tone soun ds. A dr iver message ap ­
pears as well to exp lai n the ma lf un ction in
m ore detail. T he dr iver warning goes ou t after
about S seconds, but it ca n be broug ht up at
any time by p ress ing t he
ISE TI button again .
Check the function dis played as soo n as possi­
ble. The yellow symbol will not go out again
u nt il the reason fo r th e malfunction has been
cor rected.

32 Driver in formation d isplay
If several priority 2 malfunctions a re present,
the symbols appear in succession and remain
for about 2 seconds.
•
•
•
Ad B lue /9
Ad Blue./'
•
Electromechanical steering,
Dynamic steer ing*
q page 201
Worn brake pads
¢page 33
Battery voltage
¢page34
Defective light bulb
¢page 33
Fog lights
¢page 33
Rear fog lights
¢ page 33
Check engine oil leve l
¢page 34
Engine oil senso r malfunc­
tion
¢ page 34
Engine temperature*
¢page 223
Low fuel level
¢page 34
Refill Ad Blue*
¢page228
AdBlue malfunction*
¢page 228
Windsh ield washer flu id level
low
q page 33
Convenience key*
Key not in vehicle
¢ page 33
Light/rain sensor defective
¢ page 33
Dynamic headlight range
cont ro l defective
¢ page 35
•
m
c:bHYBRID
(D Tips
Battery in remote contro l key
¢ page 37
Electromechan ical park ing
brake
¢ page90
Engine speed limitation *
¢ page 34, ¢ page 99
Diese l partic ulate fi lter* clog­
ged
¢ page34
Adaptive light defective*
¢page35
Steer ing malfunction
¢ page 35
Ignition lock malfunction
¢page35
Adaptive dampers*
¢page35
W indshield wiper defective
¢page35
Tire pressure monitoring sys­
tem* Loss of tire pressure
¢ page266
Tire pressure monitoring sys­
tem*
System not avai lab le
¢ page266
Automat ic t ransm ission ma l­
f u nct ion
¢ page 128
Hybr id drive*
¢ page99
The speed warnings warn ing th res ho ld 1
lDl and warning thresho ld 7 [DJ ;ire also
yellow symbo ls in some models . The warn­
ing is always shown as a small symbo l in
the upper area of the disp lay¢
page 93.

84 On th e road
• Press the key¢ fig. 96 -the engine will
start.
• It is possible that there w ill be a slight delay
when start ing the engine for diesel vehicles*
in colder temperatures . Therefore, you must
hold the brake pedal down until the eng ine
starts. The indicator lamp
m i llum inates
when the eng ine is preheated .
Switching the ignition on /off
If you would like to switch the ignition on
without s tarting the engine, follow these
steps :
• Insert the key into the ignition lock.
• Press the key briefly
without press the brake
pedal.
• To switch the ignition off, press the key
again .
Diesel vehicles* are preheated while the igni­
tion is sw itched on .
When starting the engine, major e lectrica l
loads are switched off temporarily .
You can on ly remove the key with the ignition
switched off. To do this, you have to press on
the key again.
I f the engine should not sta rt immediately,
the starting process is automatically stopped
after a short time. Repeat starting procedure .
Start-Stop-System*:
Note the information on¢ page 91, Start ­
Stop-System.
.&_ WARNING
- Never allow the engine to run in confined
spaces -danger of asphyxiation.
- Never remove the ign ition key from the
ignition lock whi le the vehicle is moving .
Otherwise, the stee ring lock co uld sud­
denly engage and you would not be able
to steer the vehicle.
- Always take the key with yo u whenever
you leave your vehicle . Otherwise , the
engine could be started or e lectr ica l
equipment such as the power w indows could be operated
. This can lead to seri­
ous injury.
- Never leave children or persons req uiring
assistance unattended in the vehicle. The
doors can be locked using the remote
transmitter, preventing people from es­ caping from the veh icle on their own in
the event of a n emergency. Depending
on the time of year, peop le inside the ve­
h icle can be exposed to very high or very
low temperatu res.
0 Note
Avoid high eng ine rpm, full th rottle and
heavy engine loads unti l the engine has
r eached operating tempe rat ure -othe r­
wise you ris k eng ine damage.
@) For the sake of the environment
D o not let the engine run wh ile pa rked to
warm up. Begin dr iving immediately . Thi s
r educes u nnecessary emissions.
(D Tips
- If the key cannot be removed from the
ign ition lock, yo u have to pull t he me­
chanical key o ut o f the mas ter key in or­
der to be able to lock the vehicle
<:!>page 38.
-Aft er s tarting a col d engine, there may
be a brief period of inc reased noise be ­
cause the oil pressure must first bui ld up
in the hydraulic valve ad justers . This is
n ormal and not a cause for concern.
- If you leave the vehicle with the ignition
switched on, the ignit ion w ill switch off
after a certain per iod of t ime. Please
note that electrical equ ipment such as
exterior lights will sw itch off as well
when that happens .

Fa u lts in th e brake sy stem
If you should notice a sudden increase in
brake peda l travel, then one of the two brake
circuits may have failed~.&..
Low brak e flu id level
Malfunct ions can occur in the brake syste m if
the brake fl uid leve l is too low. The b rake fluid
l eve l is monito red electronically.
Brake boost er
The brake booster increases the pressure that
you generate w ith the brake pedal.
It only op­
e rates while the eng ine is running or with the
i gnit ion sw itched on (hybr id dr ive*)~ .&,.
Brake lining wear statu s
Brake lining wear may be checked by visual in­
spection of the condition of the brake pads
through the openings in the whee l. If neces­
sa ry, the wheel may be removed for this in­
spection
~ page 2 73, Changing a wheel.
.&_ WARNING
=
- You should perform braking maneuvers
for the purpose of clean ing the brake
system on ly if road conditions permit.
Other road users must not be put at risk -
you may cause an acc ident!
- Before descending a steep grade, reduce speed and shift transmiss ion into a lower
gear or lower driving range. Do not ride
the brakes or hold the pedal down too long or too often. This could cause the
brakes to get hot and dimin ish b raking
efficiency.
- Do not "ride the brakes" by resting your
foot on the pedal when you do not intend
to brake. Th is may cause the b rakes to
overheat, premat ure wear and increased
stopp ing distance .
- Under certain climat ic and operating
c ondit ions such as passing through wa­
ter, driving in heavy rain or after wash ing
the vehicle, the effectiveness of the brakes can be reduced. In winter, ice can
accumulate on the brake pads, linings,
discs and drums. Carefully apply brakes
Int ellig ent technolog y 201
for a test . Brakes will dry and ice coat­
ings w ill be cleaned
off after a few care­
ful brake applicat ions.
- Driving for an extended period of time on
salt-covered roads without using your
brakes can a lso affect braking efficiency.
Clean
off accumulated salt coating from
brake discs and pads with a few ca reful
brake applications.
- If you damage the front spoiler, or if you install a different spoiler, be sure the ai r
f low to the front brakes is not obst ruct­
ed. Otherw ise the bra ke system could
overhea t reducing the effectiveness of
the entire brake system .
- Failure of one b rake circuit will impair
the braking capab ility result ing in an in­
creased stopping distance. Avoid driving
the vehicle and have it towed to the near­
est a uthorized Audi dea ler or q ualified
workshop.
- Never let the vehicle roll to a stop with
the eng ine shut off .
- If the b rake booster is not working, the
brake peda l must be pressed considera­
bly harder to make up for the lack of
booster assistance.
Electromechanical
power assist, Dynamic
steering
The electromechonical power assist helps the
driver when steering.
Power s teer ing adap ts electronically based on
the ve hicle speed .
Indicator lights and messages
• Stee ring d efec tiv e! Do not d rive vehi cle!
If this indicator light turns on and stays on
and this message appears, the power steer ing
may have failed .
Stop the vehicle in a safe location as soon as
poss ible. Do
not continue driving. See your
authorized Aud i dea ler or other qualified re-
pair facility fo r ass istance. ..,.
•
•

236 Checking and filling
(D Note
Driving with an insufficient oi l level is like­
ly to ca use seve re damage to the eng ine.
@ Tips
- The oil pressure warning display. is
not an indicator of the oil level. Do not
rely on it. Instead , check the oil level in
your engine at regular intervals, pref ­
erably each t ime you refuel, and always
before going on a long trip .
-If you have the impression your engine
consumes excessive amo unts of oi l, we
r ecommend that yo u consult an author ­
i zed Audi dealer to have the cause of
you r concern p rope rly diag nosed. Keep in
mi nd t hat t he ac curat e measure ment of
oi l co nsu mp tion re q uires grea t care and
may ta ke some time. A n author ize d Audi
dea ler has inst ructions about how to
measure oil consum ptio n accurately.
Checking the engine oil level
Fig . 199 Di splay: O il leve l in dica tor
Read oil level
.. Park you r vehicle so that i t is hor izo nta lly
l evel.
.. Shu t the engine off when i t is at ope ra ti ng
temperature .
.. Swi tch on ly th e igni tion bac k on .
.. Wa it approx. two minutes .
.. Se lect :
I CAR ! funct io n button > Oil level. Or
.. Se lect :
ICAR ! function button> Car systems*
control button > Servicing & checks > Oil
level.
.. Read the oil level in the radio or MM I* Dis ­
p lay
r=> fig. 199 . Add engine o il if the bar of
the o il level indicato r is near "Mi n"
r=>page236.
The oil leve l needs to be checked at regu lar i n­
terva ls. The best times to do this are whenev­
er you refuel and prio r to long trips .
D epend in g on the w ay the vehicle is driven
and the ope rat ing cond itio ns, oi l cons umption
can be up to a 1/2 quart per 60 0 miles (O.S li ­
ter per 1,000 km). Consumption may be high­
er withi n the first 3,000 miles (5,000 km).
(!} Tips
The oil leve l indicator in t he radio or M MI*
D isplay is on ly an information display . If
the oil leve l is too low, a m inimum o il
war ning appea rs in the instrument cluster.
A dd oil ¢
page 236. If the hood has bee n
opened , the cur ren t oi l level is shown in
t he i nstr ume nt cl uster the next t ime t he
i gni tion is sw itche d on.
Adding engine oil 't:::r.
Fig. 2 00 Eng ine co mpa rtm ent : cove r on t he e ng in e o il
f il le r ne ck
B efo re you check anyth ing in the en gine com­
partment ,
always read and heed all WARN­
INGS
¢ A in Working in the engine compart­
ment on page 231 .
.. Shu t the eng ine off .
.. Unscrew the cap
9::7; to the eng ine o il filling
hole ¢
fig. 200, r=> page 233, fig . 198 .
.. Carefully top off with 0.5 quarts (0.5 liters)
of t he appropr iate oil¢
page 233.
.. Check the oi l level again after two minutes
¢ page 2 36 , Checking the engine oil l evel. II>

248 Tire s and whee ls
- Never mount used tires on yo ur vehicle if
you are not sure of their "previous histo­
ry." Old used tires may have been dam­
aged even though the damage cannot be
seen that can lead to sudden tire failure
and loss of vehicle control.
- If you notice unusual vibration or if the
vehicle pulls to one side when driving, al­
ways stop as soon as it is safe to do so and check the wheels and tires for dam­
age.
(D Note
Please note that summer and winter tires
are designed for the cond itions that are
Glossary of tire and loading terminology
Acces sory weight
means the comb ined we ight (in excess of
those standard items which may be rep laced)
of au toma tic tra nsmission, power steer ing,
power brakes, power windows, power seats,
radio, and heater, to the extent that these
items are availab le as factory -installed equip­
ment (whether installed or not) .
Aspect ratio
means the ratio of the he ight to the w idth of
the tire in percent . Numbers of 55 or lower in­
dicate a low sidewall for improved steering re­
sponse and better overall handling on dry pavement .
Bead
means the part of the ti re that is made of
steel wires, wrapped or reinforced by ply cords
and that is shaped to fit the rim.
Bead s eparation
means a b reakdown of the bond between
components in the bead.
Cord
means the strands forming the plies in the
tire . typica
l in those seasons. Audi recommends
using winter tires during the winter
months. Low temperatures signif icant ly
decrease the e lasticity of summer tires,
which affects tract ion and brak ing ability.
If summer tires are used in very cold tem­ peratures, cracks ca n form on the tread
bars, resulting in permanent tire damage
that can cause loud driving no ise and un­
balanced t ires. Audi is not responsible for
th is type of damage .
Cold tire inflation pre ssure
means the t ire p ressure recommended by the
vehicle manufacturer fo r a tire of a des ignated
s ize that has not bee n driven for more than a
coup le of miles (k ilometers) at low speeds in
the three hour period before the tire pressure
is measured or adjusted.
Curb weight
means the we ight of a motor ve hicle w ith
standard equipment including the max imum
capacity of fuel, oil, and coolant, air condi ­
tioning and additional weight of optiona l
equipment.
Extra load tire
means a t ire design to operate at higher loads
and at h igher inflation pressures than the cor­
responding standard tire . Extra load tires may
be identified as "XL", "x l" , "EXTRA LOAD", or
"RF" on the sidewall.
Gross A xle Weight Rating ("GAWR ")
means the lo ad -carry ing capacity of a s ingle
axle system , measured at the tire-ground in­
terfaces.
Gr oss Vehicle Weight Rating ("GVWR ")
means the maximum total loaded we ight of
t h e vehi cle. .,.

264 Tire s and wheel s
driving a few yards and correct if neces­
sary. Follow the instructions from the
snow cha in manufacturer when doing so.
(D Tips
Where snow chains are mandatory oncer ­
tain roads, this normally also applies to
veh icles with all-wheel dr ive .
Wheel bolts
Wheel bolts must always be tightened to the
correct torque.
The design of whee l bolts is matched to the
factory insta lled rims . If different rims are fit ­
ted, the correct wheel bolts with the right l ength and correctly shaped bolt heads must
be used. This ensures that wheels are f itted
securely and that the brake system functions
correctly .
In certain circumstances, you may not use
wheel bolts from a different vehicle -even if it
is the same model
¢ page 295.
.&_ WARNING
Improperly tig htened or maintained wheel
bolts can become loose ca using loss of
cont ro l, a co llision and serious p ersona l in­
Jury.
- Always keep the wheel bolts and the
threads in t he wheel hubs clea n so the
wheel bolts can tu rn easily and be prop­
erly tigh tened.
- N ever grease or oil the wheel bo lts and
the threads in the wheel h ubs. They can
become loose w hile d riving if greased or
oiled, even if tightened to the specified
torq ue.
- Only use wheel bolts that be long to the
rim being installed.
- N ever use different whee ls bolts on your
vehicle.
- Always mai nta in the co rrec t tighte ning
tor que fo r the wheel bo lts to reduce the
risk of a wheel loss . If the tightening tor­
que of the wheel bo lts is too low, they
can loosen and come out when the veh i- cle is moving.
If the tightening torque is
too high, the wheel bolts and threads
can be damaged and the wheel can be­
come loose.
(D Note
The specified torque for the whee l bolts is
105 ft lb (140 Nm) with a to lerance of
± 7,4 ft lb(± 10 Nm). Torque wheel bolts
diagonally . After changing a wheel, the
torque must be checked as soon as poss i­
ble with a to rque wrench -preferab ly by an
a uthorized Aud i dea le r or qualified wor k­
shop.
Low aspect ratio tires
Your A udi is factory -eq uipped w it h low aspect
ratio tires. These tires have been thoroughly
tested and been se lected specifically for your
model for their superb performance, road fee l
and handling under a variety of driving condi­
t ions . Ask your authorized Audi dealer for
more details .
The low aspect ratio of these tires is ind icated
by a numeral of
55 or less in the tire's s ize
designation . The numeral represents the ratio
of the tire's sidewall height in relation to its
t read width exp ressed in percentage. Conven­
tiona l tires have a he ight/w idth rat io of 60 or
more.
Th e performanc e of low-a spect-ratio tire s is
pa rticularly sensi tive to improp er inflation
pre ssure. It i s ther efor e important that low
a spe ct ratio tir es are inflated to the spe cified
pre ssure and that the inflation pre ssure i s
regula rly checked and mainta ined. Tire pre s­
sure s should be checked at lea st once a
month and al way s befo re a long trip
¢ page 2 53, Checking tire pressure.
What you can do to a void tire and rim
damage
Low aspect ratio tires can be damaged more
easily by impact w ith potholes, curbs, gul lies
or ridges on the road, particularly if the tire is
underinflated . ..,.