2015 AUDI A6 Owners Manual

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being loaded on the vehicle.
That weight may not safely
exceed the available cargo
and luggage load capacity
calculated in Step 4.
6. If your vehicle will be towing
a trailer, load from your trail­
er will be transferred to your
vehicle. Consult this manual
to determine how this re­
duces the available cargo
and luggage load capacity of
your vehicle.
.,.Che ck the tire sidewall
(¢ page 257, fig. 199) to de­
termine the designated load rating for a specific tire.
Tire service life
The service life of tires depends
on a lot of different things in­
cluding proper installation and
balancing, correct tire pressure and driving style.
Fig . 197 Tire tread: tread wear indi­
cators (TWI)
Tires and wheels 255
Fig. 198 Rotating tires for more even
wear
Tread Wear Indicator (TWI)
The original tires on your vehi­
cle have
1/16 inch (1.6 mm)
high "wear indicators"
¢ fig. 197 running across the
tread. Depending on the make,
there will be six to eight of
them evenly placed around the
tire. Marks on the tire sidewall (for example "TWI" or other
symbols) indicate the positions
of the tread wear indicators.
Worn tires must be replaced.
Different figures may apply in
other countries
¢ & .
Tire pressure
Incorrect tire pressure causes
premature wear and can cause
sudden tire blow-out. For this
reason, tire pressure must be
checked at least once a month
¢ page 249.

256 Tires a nd whee ls
Driving style - Extra care must be ta ken when
Driving fast around curves , rotat
ing direction-specific
heavy acceleration and hard tires
¢
page 2 77.
b raking 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 suggested 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 vehicle,
cause excessive tire wear, im-
the more it wears at certain
pairing the safety of the vehi-
points; therefore, we recom-
cle. If tires show excessive
mend that you follow the tire
wear, have the wheel alignment
manufacturer's suggested tire
checked by an authorized Audi
rotation intervals.
dealer or qualified workshop.
-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 . 198. ¢page 197. ...

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_&. WARNING
Sudden tire failure can lead
to loss of control, a crash and serious personal injury!
-Never drive a vehicle when the tread on any tire is worn down to the wear indica­
tors.
-
-Worn tires are a safety haz­ ard, they do not grip well on
wet roads and increase your risk of "hydroplaning" and
loss of control.
-Always keep chemicals that can cause tire damage, such
as grease, oil, gasoline and brake fluid away from tires .
-Tires age even if they are not being used and can fail
suddenly, especially at high
speeds. Tires that are more
than 6 years old can only be used in an emergency and
then with special care and at lower speeds.
-Never mount used tires on your vehicle if you are not sure of their "previous histo­ry." Old used tires may have
been damaged even though
the damage cannot be seen
that can lead to sudden tire
Tires and wheels 257
failure and loss of vehicle control.
New tires and replacing
tires and wheels
New tires and wheels hove to
be broken in.
Fig. 199 Tire specification codes on
the sidewall of a tire
No. Description
CD Passenger car tire (where
applicable)
0 Nominal width of tire in
millimeters
® Ratio of height to width
(aspect ratio)
© Radial
® Rim diameter code

258 Tires an d whee ls
No . Description
® Load index and speed rat-
ing
(J) U.S . DOT tire identifica-
tion number
® Audi Original tire
® Sever snow conditions
@ Tire ply composition and materials used
@ Maximum load rating
@ Treadwear, traction and
temperature grades
@ Maximum permissible in-
flation pressure
T he tires and rims are essential
parts of the vehicle's design .
The tires and rims approved by
Audi are specially matched to
the characteristics of the vehi­
cle and can make a major con­
tribution to good road holding and safe handling when in good
condition and properly inflated
c::> ,&. .
We recommend that a ll work
on tires and wheels be per­
formed by an authorized Audi
deale r. They are familiar with
r ecommended p rocedures and
have the necessary special too ls
and spare parts as well as the proper facilities for disposing of
the old ti res.
Autho rized Audi dealers have
the necessary information
about technical requirements
for installing or changing tires
and rims .
Replacing tires and wheels
Tires sho uld be replaced at
least in pairs and not individu­
ally (for example both front
tires or both rear tires togeth­
er).
B e sure to read and heed the in ­
formation to the tire pressure
monitoring system
c::> page 267.
Always buy replacement radial
tires that have the same specifi­
cations as the tires approved
f or your vehicle by Audi. Re­
placeme nt tires m ust always
have the same load rating spec­
ification as the orig inal equip­
ment or approved optional tires
listed in the table
c::> page 244.
Audi-app roved spec ificat io n
tires are specially matched to
your vehicle and its load limits ,
and can contribute to the im -
portant roadholding, driv ing .,.

Tires and wheels 259
characteristics, and safety of This contains the following in-•
the vehicle. The table formation: • '
(¢ page 244) lists specifica-p Indicates the tire is for pas-
tions of the tires approved for senger cars (where applica-
the Audi models covered by ble)
your Owner's Literature .
255 Nominal tire width in mm
The tire pressure label located of the tire from sidewall
on driver's side B-pillar edge to sidewall edge. In
( ¢
page 244~ fig. 196) lists the
general, the larger the num-
specifications of the original ber, the wider the tire
equipment tires installed on
40 Height/width ratio in per-
your vehicle at the time it was cent (aspect ratio)
manufactured.
R Tire construction: Radial
Federal law requires tire manu-
19 Rim diameter code (in in-
facturers to place standardized ches)
information on the sidewall of
100 Load rating code
all tires ¢
fig. 199. This infor-H Speed rating letter code
mation identifies and describes
XL (or "xl", "EXTRA LOAD" or
the fundamental characteris- "RF
") Indicates that the tire
tics, the quality grade of the is a "Reinforced" or an "Extra
tire and also provides a tire Load" tire
identification number for safety
M+S (or "M/5") Indicates that
standard certification and in the tire has some mud and
case of a recall. snow capability
Tire specifications The tires could also have the in-
Knowledge of tire specifications formation of direction of rota-
tion
c:::> page 238.
makes it easier to choose the
correct tires
. Radial tires have
Tire manufacturing date
the tire specifications marked
The manufacturing date is also
M on the sidewall, for example: indicated on the tire sidewall N
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255/40 R 19 100 H XL (possibly only on the inner side 'SI: ,...., \!)
of the wheel): 1.1'1 .... ,...., 1.1'1 ,....,

260 Tires and wheels
"DOT ... 2214 ... " means, for ex-
ample, the tire was produced in
the 22nd week of 2014.
Speed rating (letter code)
The speed rating letter code on
the wheels indicates the maxi-
mum permissible road speeds
c:> .&. in Winter tires on
page 264.
P up to 93 mph (150 km/h)
Q up to 99 mph (158 km/h)
R up to 106 mph (170 km/h)
s up to 110 mph (180 km/h)
T up to 118 mph (190 km/h)
U up to 124 mph (200 km/h)
H up to 130 mph (210 km/h)
V up to 149 mph (240 km/h)
1
)
Z over 149 mph (240 km/h) l)
W up to 168 mph (270 km/h)1
)
Y up to 186 mph (298 km/h)1
)
Your vehicle is normally factory
equ ipped with tires, which pos-
sess excellent driving character- istics and give your Audi opti-
mum driv ing comfort. An elec-
tronic speed limiter
c:> page 30
will normally prevent your vehi-
1) For tires with a maximum speed ca­
pability ov er 149 mph (240 km/h) ,
tire manufacturers sometimes use
the letters "ZR."
cle from going faster than the
tire speed rating
c:> A .
U.S. DOT Tire Identification
Number (TIN) and tire
manufacture date
This is the tire's "serial num-
ber". It begins with the letters
"DOT" and indicates that the
tire meets all federal stand- ards. The next two numbers or letters indicate the plant where
it was manufactured, and the
last four numbers represent the
week and year of manufacture.
For example, the numbers
2214 mean the tire was pro-
duced in the 22nd week of
2014. The other numbers are
marketing codes that may or
may not be used by the tire
manufacturer. This information
is used to contact consumers if
a t ire defect requires a recall.
Audi Original tire
T ires with the identification
"AO" or "RO" have been special-
Ly matched with your Audi. We
recommend using on ly these
...

M N
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tires because they meet the highest standard s regarding
safety and driving characteris­
tics when used correctly. Your
authorized Audi dealer will
gladly provide you with more
information.
Tire ply composition and materials used
The number of plies indicates
the number of layers of rubber­
coated fabric in the tire. In gen­
eral, the greater the number of
plies, the more weight a tire
can support. Tire manufactur­
ers also must indicate the ma­
terials in the tire, which include steel, nylon, polyester, and oth­
ers.
Maximum Load Rating
This number indicates the max­
imum load in kilograms and
pounds that can be carried by
the tire.
Tire quality grading for
treadwear, traction, and
temperature resistance
Tread wear, traction and tem­ perature grades¢
page 263.
Tires and wheels 261
Maximum Permissible
Inflation Pressure
This number is the greatest
amount of air pressure that
should ever be put in the tire under normal driving condi­
tions.
A WARNING
- Using incorrect or unmatch­
ed tires and
I or wheels or
improper tire and wheel
combinations can lead to
loss of control, collision and
serious personal injury.
-Always use tires, rims and wheel bolts that meet the specifications of original
factory-installed tires or
other combinations that have been specifically ap­
proved by the vehicle manu­
facturer.
-Tires age even if they are not being used and can fail
suddenly, especially at high speeds. Tires that are more
than 6 years old can only be
used in an emergency and
then with special care and at lower speeds.
-Never mount used tires on your vehicle if you are not
•
•
'

262 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
..