wheel size AUDI Q7 2015 Owner´s Manual

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conditions is impossible in all conceiva­
ble situations that may happen during
the useful life of your vehicle.
- The Advanced Airbag System can deploy
in accordance with the "low risk" option
under the U.S. Federal Standard if a child
that is heavier than the typical one-year
old child is on the front passenger seat
and the other conditions for airbag de­
ployment are met.
- Accident statistics have shown that chil­
dren are generally safer in the rear seat
area than in the front seating position.
- For their own safety, all children, espe­
cially 12 years and younger, should al­
ways ride in the back properly restrained
for their age and size.
Advanced front airbag system
Your vehicle is equipped with a front Advanced
Airbag System in compliance with United
States Federal Motor Vehicle Safety Standard
208 as applicable at the time your vehicle was
manufactured.
The front Advanced Airbag System supple­ ments the safety belts to provide additional
protection for the driver's and front passeng­
er's heads and upper bodies in frontal crashes.
The airbags inflate only in frontal impacts
when the vehicle deceleration is high enough .
The front Advanced Airbag System for the
front seat occupants is not a substitute for
your safety belts . Rather, it is part of the over­
all occupant restraint system in your vehicle .
Always remember that the airbag system can
only help to protect you, if you are sitting up­
right, wearing your safety belt and wearing it
properly. This is why you and your passengers
must always be properly restrained, not just
because the law requires you to be.
The Advanced Airbag System in your vehicle
has been certified to meet the "low risk" re­
quirements for 3 and 6 year-old children on
the passenger side and very small adults on
the driver side. The low risk deployment crite­
ria are intended to help reduce the risk of in-
Airbag system 187
jury through interaction with the front airbag
that can occur, for example, by being too close to the steering wheel and instrument
panel when the airbag inflates.
In addition, the system has been certified to
comply with the "suppression" requirements
of the Safety Standard, to turn off the front
airbag for infants 12 months old and younger
who are restrained on the front passenger
seat in child restraints that are listed in the
Standard
~ page 205, Child restraints and
Advanced Airbags .
"Suppression" requires the front airbag on the
passenger side to be turned off if:
- a child up to about one year of age is re­
strained on the front passenger seat in one
of the rear-facing or forward-facing infant
restraints listed in Federal Motor Vehicle
Safety Standard 208 with which the Ad­
vanced Airbag System in your vehicle was
certified. For a listing of the child restraints
that were used to certify your vehicle's com­
pliance with the US Safety Standard
~page 205,
-weight less than a thresho ld level stored in
the control unit is detected on the front pas­
senger seat .
When a person is detected on the front pas ­
senger seat, weighing more than the total
weight of a child that is about 1 year old re­
strained in one of the rear-facing or forward­
facing infant restraints (listed in Federal Mo­
tor Vehicle Safety Standard 208 with which
the Advanced Airbag System in your vehicle
was certified), the front airbag on the passen­ ger side may or may not deploy.
The
PASSENGER AIR BAG OFF light comes on
when the electronic control unit detects a to­
tal weight on the front passenger seat that re­ quires the front airbag to be turned off . If the
PASSENGER AIR BAG OFF light does not
come on, the front airbag on the passenger
side has not been turned off by the control
unit and can deploy if the control unit senses
an impact that meets the conditions stored in
its memory. ..,. •
•

204 Child Saf ety
- Always install rear-facing child safety
seats on the rear seat.
- If you must install a rearward facing
ch ild safety seat on the front passenger
seat in exceptiona l circumstances and
the
PAS SENGER AIR BA G OFF light does
not come on and stay on, immed iately
install the rear-facing child safety seat in
a rear seating posit ion and have the air­
bag system inspec ted immediately by
yo ur Audi dealer.
_& WARNING
If, in exceptional c ircumstances, you mus t
install a forward -facing child restra int on
the front passenger's seat:
- Always make su re the forward-fac ing
seat has been designed and certified by
its manufacturer for use on a front seat
with a passenger front and side airbag.
- Always follow the man ufacturer's in­
struct ions provided with the child safety
seat or carrier.
- Always move t he passenger seat into its
rearmost position in the seat 's fore and
aft adjustment range, as far away from
the a irbag as poss ible before installing
the ch ild restraint. The backrest must be
adjusted to an upr ight position .
- Always make sure that the
PASSENGER
AIR BAG OFF
light comes on and stays
on all the time whenever the ignition is
switched on.
(D Tips
Always rep lace child rest raints that were
installed in a vehicle during a crash. Dam­
age to a child rest raint that is not visible
could cause i t to fail i n another collisio n
si tua tion.
Advanced front airbag system and
children
Your veh icle is equipped with an "Advanced
A irbag System" in compliance w ith United
States Federal Motor Vehicle Safety Standard (FMVSS) 208 as applicable at the time you
r
vehicle was manufacture d.
T he Adv anced Airbag system in yo ur vehicle
has been certified to mee t the "low-risk" re­
quirements for 3-and 6-year old children on
the passenger side and sma ll adults on the
drive r side. The low r is k dep loyment cr iteria
are intended to red uce the risk of in jury
through interact ion w it h the airbag that can
occur, for example, by being too close to the
steering wheel and instrument panel when
the a irbag inflates . In addition, the syst em
has been ce rtified to comply wit h the "sup­
pression" re quirements o f th e Safety Sta nd­
ard, to t urn off the fron t airbag for infan ts up
to 12 months who are res trained on the front
passenger seat in child restraints that a re list­
ed in the Standard.
E ven though your veh icle is eq uipped wit h an
Advanced Airbag system , a ll children, espe­
cia lly those 12 years and yo unger, should a l­
ways ride in the back seat properly restrained
for their age and size. The airbag on the pas­
senger side makes the front seat a potentially
dangerous place for a ch ild to ride . The front
seat is not the safest p lace for a ch ild in a for­
ward-fac ing ch ild safety seat. It can be a ve ry
dange rous place fo r an infan t or a large r child
i n a rea rward-f acing se at.
Advanced Airbags and the weight­
sensing mat in the front seat
The Advanced A irbag System in your vehicle
detects the presence of an infant or child in a
c h ild restra int on the front passenge r seat us­
i ng the weig ht-sens ing mat in the seat cush ­
ion and the sensor be low th e safe ty belt latch
o n the front passenge r seat that measures t he
tens ion on the s afety be lt.
T he we ight -sensi ng mat measures total
we ight of t he chi ld and the ch ild safety seat
and a c hild b la nk et on the front passenger
seat. The we igh t on the fron t pa sse nger se at
is re late d t o the desig n of the ch ild res trai nt
and its "f ootprint", the s ize and shape o f the
bottom of the chi ld restraint as it sits on the .,..

224 Intellig ent technol ogy
roads . If the systems begin acting to sta­
bilize your vehicle, you should immedi­
ately change your speed to match the
road and traff ic conditions. Do not let
the inc reased safety prov ided by these
systems tempt you to take r isks. Doing
so w ill increase the risk of a loss of vehi­
cl e con tro l, coll is ion and serio us personal
injuries.
- Always adapt you r speed to road, traff ic
and weather condit ions. The risk of los­
ing contro l of the veh icle increases when
driv ing too fast, especia lly t hrough
c u rves and on slippery or wet roads, and
when driving too close to vehicles up
ahead. The ESC and its integrated sys­
tems cannot always prevent collisions -
there is still a r isk of accidents!
- Always acce lerate with special care on
even, smooth surfaces such as those that
Switching on/off
are wet or covered with ice and snow.
The drive wheels can spin even w ith
these assistance systems that cannot al­
ways help to reduce the risk of loss of ve­
h icle control.
(D Tips
- ABS and ASR only work correctly when
all four wheels are equipped with identi­
cal tires. D ifferent tire sizes can lead to a
reduction in engine power.
- You may hear noises when the systems
descr ibed are working.
- If the ind icator light
DJ or fil (USA
mode ls)/ ti] (Canada models) appears,
there may be a malfunction
<:;> page 16,
<:;>page 18.
ESC turns on automatically when you start the engine .
,.-------------.,
------------------
Fig. 231 Upper cente r console: f'J OFF button
The follow ing s ituations are exceptions where
it may be useful to switch on offroad mode to
a llow the whee ls to spin:
Offroad mode on
- Rocking the vehicle to free it when it is st uck
- Dr iving in deep snow or on loose ground
- Dr iving with snow chains
- Dr iving on rough terrain when much of the
car's weight is lifted off the whee ls (axle ar­
ticulation)
- Dr iving downh ill wh ile brak ing on loose
ground
Offroad mode off
Beha vior
The ESC and ASR stabilization funct ions The fu ll stab ilization funct ion of the ESC
are limited <:;>,&..
and ASR is availab le agai n.
Operat ion Press the I~ O FFI button . Press the I~ OFFI button again.
Indi ca to r IJ tu rnson. II turns off.
li g ht s
D riv er m es- Stabil izat ion cont rol (ES C): O ffroad. S tabil ization contro l (ESC) : On
sa ges Warning! R estricted st ab ility

276 Tires a nd whee ls
Recommended inflation Sidewall
pressure
means that portion of a tire be -
see
c:::> page 2 7 4, Cold tire infla-tween the tread and bead.
tion pressure.
Speed rating (letter code )
Reinforced tire
means the speed at which a tire
means a tire design to operate is designed to be driven for ex-
at higher loads and at higher tended periods of time. The rat-
inflation pressures than the ings range from 93 mph (150
corresponding standard tire .
km/h) to 186 mph (298 km/h)
Reinforced tires may be identi -
c:::> page 294. You may not find
fied as "XL", "xl", "EXTRA
this information on all tires be-
LOAD", or "RF" on the sidewall.
cause it is not required by law.
Rim The speed rating letter code,
means a metal support for a where applicable, is molded on
tire or a tire and tube assembly the tire sidewall and indicates
upon which the tire beads are the maximum permissible
road
seated . speeds
c:::> A in Winter tires on
Rim d
iameter
page 298.
means nominal diameter of the
T ir e pressure mon itoring
system
bead seat. If you change your means a system that detects
wheel size, you will have to pur-
chase new tires to match the when one or more of a vehicle's
new rim diameter . tires are underinflated and illu-
Rim
size de signation
m inates a low tire pressure
warning telltale.
means rim diameter and width.
Tread
R im width
means that portion of a tire
means nominal distance be- that comes into contact with
tween rim flanges. the road.
...

Tires and wheels 2 79
Tire pressure generally refers to tant things you can do to help •
the amount of air in a tire that avoid sudden tire failure. Un-• '
it needs it to do its job and derinflated tires are a major
safely carry the combined load cause of sudden tire failure. of the entire vehicle and its con- Keeping tires at the right pres-
tents. Tire pressure is measured sure is also important for safe
in kilopascals (kPa), the inter- and responsive vehicle han-
national measuring unit and in dling, traction, braking and
pounds per square inch (PSI). load carrying.
Tire pressures
Tire pressure is based in part on are particularly important
the vehicle's design and load when the vehicle is being driv-
limit - the greatest amount of en at higher speeds, and then
weight that the vehicle can car-especially when heavily loaded
ry safely and the tire size. The even within the permissible
proper tire pressure is frequent-load-carrying capacities ap-
ly referred to as the "recom-proved for your vehicle.
mended cold tire inflation pres-The recommended tire pres-
sure." Air in the tires expands sures for your Audi depend on
when the tire heats up because the kind of tires on your vehicle
of internal friction when it flex- and the number of passengers
es in use. The tire pressure is and/or amount of luggage you
higher when the tire has will be transporting.
warmed up than when it is The tire pressure label is locat-
"cold." It is the inflation pres-
ed on the driver's side B-pillar.
sure in a "cold" tire that counts.
Therefore, you should never let The tire pressure label lists the
recommended cold tire infla-
air out of a warm tire to match
"cold tire inflation pressure" tion pressures for the vehicle at
its maximum capacity weight
recommendations. The tires
would then be underinflated and tires that were on your ve-
and could fail suddenly. hicle at the time it was manu-
factured.
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Maintaining proper tire pres-...J
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280 Tires and wheels
If you wish to improve comfort See the illustration ¢ fig. 250
when operating the vehicle at for the location of the label on
normal load (up to 3 occu-driver's side B-pillar (color of
pants), you can adjust tire the actual label and exact loca-
pressures to those specified tion on the vehicle will vary
for normal vehicle load. Before slightly).
operating the vehicle at maxi-Note that the following table is
mum load, you must increase accurate at the time of going to
the tire pressures to those press and is subject to change .
specified for maximum vehicle In the event of discrepancies,
load¢&. the tire pressure label located
Bear in mind that the tire pres- on the driver's side B-pillar al-
sure monitoring system can on- ways takes precedence.
ly monitor the tire pressures
The table below lists the rec-
you have stored . The system
ommended cold tire inflation
does not recognize the load
pressures for the Audi model
condition of your vehicle. covered by your Owner's Litera-
The effectiveness of the tire ture at the vehicle's capacity
pressure monitoring system weight and the tire sizes instal-
will be impaired if you store led on the respective models as
normal load pressures but then original equipment, or as a fac-
operate the vehicle at its maxi-tory option.
...
mum load¢&.

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Tires and wheels 281
Model/ Tire designation Tire pressure
Engine normal load condition full load condition
front rear front rear
PSI kPA PSI kPA PSI kPA PSI
kPA
255/55 R18 109H XL
All Season
35 240
35 240 44
300 49 340
265/50 Rl9 llOH XL
All Season
35 240
35 240 44
300 49 340
Q7:
3.0 liter 275/45 R20 110H XL
All Season
35 240
35 240
44 300 49 340
6-cylinder
275/4S R20 llOY XL
High Performance
35 240 35 240 44 300 49 340
295/35 R21 107V XL 36 250 35 240
44
300 49 340
High Performance
XL~ reinforced or extra load tire. It may also appear as xl, EXTRA LOAD, or RF on the tire side-
wa .
The correct tire pressure for the
spare wheel is located on a la­
bel on the driver's side B-pillar.
Because technical changes may
be made to vehicle equipment
during the model year, always
compare the tire size designa­
tion on the tire pressure label on your vehicle with the tires on
your vehicle. Make sure that the tire size information on the ve­
hicle label is the same as the
size of the tires on the vehicle.
This is especially important if
the vehicle belongs to someone
else or you bought the vehicle
with different rims/tires or you
bought the vehicle as a previ­
ously owned vehicle. Remember, your safety and
that of your passengers also de­ pends on making sure that load
limits are not exceeded. Vehicle
load includes everybody and ev­
erything in and on the vehicle.
These load limits are technical- ly referred to as the vehicle's
Gross Vehicle Weight Rating ("GVWR"). The Gross Axle
Weight Rating ("GAWR") is the maximum load that can be ap­
plied at each of the vehicle's
two axles. The Gross Vehicle
Weight Rating and the Gross
Axle Weight Rating are listed on the safety compliance stick-
er label located on the driver's
side B-pillar. The tire pressure label on your Audi lists the
maximum combined weight of ""
•
•
'

290 Tires and whee ls
Driving style - Extra care must be taken when
Driving fast around curves, rotating direction-specific
heavy acceleration and hard tires
¢
page 311.
braking increase tire wear. Wheel balancing
Rotating tires for more even
The wheels on new vehicles are
wear ba lanced. However, various sit-
For all four tires on your vehicle uations during everyday driving
to have the same service life, can cause them to become un-
we recommend that the front balanced, resulting in vibra-
and rear tires are rotated ac -tions you can usually feel
cording to the tire manufactur- through the steering wheel.
er's s uggested tire rotation in-
Unbalanced wheels must be re-
tervals . Please remember the
balanced to avoid excessive
following: wear on steering, suspension
-T ire rotation intervals may dif -and tires. A wheel must also be
fer from the vehicle service in· rebalanced when a new tire is
tervals outlined in your War -insta
lled .
ranty
& Maintenance booklet . Incorrect wheel alignment
-The longer one tire is used in
Incorrect wheel alignment can
one location on the vehic le,
cause excessive ti re wear, im-
the more it wears at certain
pairi ng the safety of the vehi-
points; t herefore, we recom-
cle . If t ires show excessive
mend that you fo llow the tire
wear, have the wheel alignment
manufacturer's suggested tire
checked by an authorized Audi
rotation interva ls.
dealer or qualified wo rkshop.
-Vehicles with front-wheel
dr ive experience more t read
All-wheel drive
wear on the front wheels com-
Vehicles with quattro must al -
pared to all-wheel drive (quat- ways have tires of the same
tro) .
size, construction and tread
-Please rotate tires as shown type. For details see
¢ fig. 253.
¢page 227. ...

296 Tires and wheels
sure of their "previous histo-
and sudden deflation and
ry." Old used tires may have loss of control.
been damaged even though -Temperature grades apply
the damage cannot be seen to tires that are properly in-
that can lead to sudden tire flated and not over or un-
failure and loss of vehicle
derinflated.
control. -For technical reasons it is
-All four wheels must be fit-
not always possible to use
ted with radial tires of the wheels from other vehicles -
same type, size (rolling cir- in some cases not even
cumference) and the same wheels from the same vehi-
tread pattern. Driving with cle model.
different tires reduces vehi- -If you install wheel trim
cle handling and can lead to
discs on the vehicle wheels,
a loss of control. make sure that the air flow
-If the spare tire is not the to the brakes is not blocked.
same as the tires that are Reduced airflow to the
mounted on the vehicle -for
brakes can them to over-
example with winter tires -
heat, increasing stopping
only use the spare tire for a distances and causing a col-
short period of time and lision.
drive with extra care. Refit -Run flat tires may only be
the normal road wheel as used on vehicles that were
soon as safely possible. equipped with them at the
-Never drive faster than the
factory. The vehicle must
maximum speed for which have a chassis designed for
the tires on your vehicle are run flat tires. Incorrect use rated because tires that are of run flat tires can lead to
driven faster than their rat-
vehicle damage or acci-
ed speed can fail suddenly. dents. Check with an au-
-Overloading tires cause heat thorized Audi dealer or tire build-up, sudden tire fail- specialist to see if your vehi-
ure, including a blowout cle can be equipped with
..

298 Tires and wheels
Sustained high temperature can cause the
materia l of the tire to degenerate and reduce
tire life, and excessive temperature can lead
to sudden tire failure<=>,& .
The grade C corresponds to a level of perform­
ance which a ll passenger car tires must meet
under the Federa l Motor Veh icle Safety Stand ­
ard No.
109. Grades Band A represent higher
levels of performance on the laboratory test
wheel than the minimum required by law.
A WARNING
The traction grade assigned to this t ire is
based on stra ight-ahead braking traction
tests, and does not include acceleration,
cornering, hydroplanin g or peak traction
characteristics.
A WARNING ,.,.____
The temperature grade for this tire is es­
tablished for a tire that is properly inflated
and not overloaded. Excessive speed, un­
derinflation, or excessive loading, either
separately or in combination, can cause heat buildup and possible tire fa ilure.
Winter tires
Winter tires can improve vehicle handling on
snow and ice. At temperatures below 45 °F
(7 °C) we recommend changing to winter
tires .
In some heavy snow areas, loca l governments
may require true winter or "snow" tires, those
with very deeply cut tread. These t ires should
only be used in pairs and be installed on all
four wheels. Make sure you purchase snow
tires that are the same size and construct ion
type as the other tires on your ve hicle.
Your veh icle is equipped with all -wheel drive,
this will improve traction during w inter driv­
i ng, even with the standard tires. However, we
strongly recommend that you always equip all
four whee ls on your veh icle w ith correctly fit­
ted winter ti res or all-season tires, when win­
ter road conditions are expected. This a lso im- proves the vehicle's
braking performance and
reduces stopping distances.
Summer tires provide less gr ip on ice and
snow.
Winter tires (snow tires) must always be fitted
on all four wheels.
Ask your authorized Audi dealer or qualified
workshop for perm itted
winter tire sizes . Use
only rad ial winter t ires .
Winter tires lose their effectiveness when the
tread is worn down to a depth of
0.157 inch
(4 mm).
Only drive w ith w inter t ires under winter con ­
ditions. Summer t ires handle better when
there is no snow or ice on the roads and the
temperature is above 45 °F (7 °() .
If you have a flat tire, see notes on spare
wheel<=>
page 291 .
Please always remember that winter tires may
have a lower speed rating than the tires origi­
nally installed on your vehicle at the time it
was manufactured. Please see
<=>page 294,
Speed rating (letter code)
for a listing of the
speed rating letter codes and the maximum
speed at which the tires can be driven .
The speed rating letter code (<=>
page 2 76) is
on the side wall of the t ire
c> page 291.
A WARNING ,.___
Winter tires have maximum speed limits
that may be lower than your vehicle's max­
imum speed. Always know the maximum
speed before driv in g off. Never drive faster
than the speed permitted for your specific
winter tires. This wi ll cause damage to the
tires leading to an accident and serious
personal injury to you and your passen­
gers.
A WARNING
'----
Driving faster than the maximum speed
for which the winter tires on your vehicle were designed can cause t ire failure in­
cluding a blowout and sudden deflation,