2014 AUDI S8 height

Incorrect wheel alignment
Incorrect wheel alignment can cause exces­
sive tire wear, impairing the safety of the vehi­
cle. If tires show excessive wear, have the
wheel alignment checked by an authorized
Audi dealer or qualified workshop .
All Wheel Drive
Vehicles with quattro must always have tires
of the same size, construction and tread type. For details see ~page 204.
_& WARNING
Sudden tire failure can lead to loss of con­
trol, 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 hazard, 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 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 toss of vehicle control. Tires and wheels 259
New tires and replacing tires and wheels
New tires and wheels have to be broken in
.
Fig. 212 Tire specificat ion codes on t he s idewall o f a
tire
No. Description
@ Passenger car tire (where applicable)
@ Nominal width of tire in millimeters
@ Ratio of height to width (aspect ratio)
© Radial
® Rim diameter code
® Load index and speed rating
0 U.S. DOT tire identification number
® Audi Original tire
® Sever snow conditions
@ Tire ply composition and materials
used
@ Maximum load rating
@ Treadwear, traction and temperature
grades
@ Maximum permissible inflation pres-
sure
The tires and rims are essential parts of the
vehicle's design . The tires and rims approved
by Audi are specialty matched to the charac­
teristics of the vehicle and can make a major .,.

260 Tire s and wheel s
contribution to good road ho lding and safe
handling when in good condition and properly
inflated
¢ ,& .
We recommend that all work on tires and
wheels be perfo rmed by an authorized Audi
dea ler. They are familiar with recommended
proced ures and have the necessary spec ial
too ls and spare parts as well as the proper fa­
cilities for disposing of the old tires.
Authorized Audi dealers have the necessary information about techn ica l requ irements for
installing or changing tires and r ims.
R eplacing t ires and whe els
Tires sho uld be rep laced at least in pairs and
not individua lly (for examp le both front tires
or both rear tires together).
Be sure to read and heed the information to
the tire pressure monitoring system*
¢page 266.
A lways buy rep lacement radial tires that have
the same specifications as the tires approved
for your vehicle by Audi. Replacement t ires
must always have the same load rating speci­
fication as the original equipment or approved
optional tires listed in the table
¢ page 252.
Aud i-approved specification ti res are specially
matched to your vehicle and its load limits,
and can contribute to the important road ho ld­
ing, driving characteristics, and safety of the
vehicle. The table
(¢page 252) lists spec ifica­
tions of the tires approved for the Audi mod­
els covered by your Owner's Literature .
The tire pressure labe l located on driver's side
B-pillar
( ¢ page 252, fig. 209) lists the speci­
f ications of the orig inal equipment tires in­
stalled on your veh icle at the time it was man­
ufactured.
Federal law requires t ire manufacturers to
p lace standard ized information on the s ide­
wall of all tires
¢ fig. 212 . This information
i dent ifies and describes the fundamental
characterist ics, the quality grade of the tire
and a lso provides a tire ident ificat ion number f
or sa fety standard ce rtification and in case of
a reca ll.
Tire specifications
Knowledge of ti re specificat ions makes it eas­
ier to choose the correct tires. Radial ti res
have the tire specifications marked on the
sidewa ll, for examp le:
255 /45 R 19 104 H
This co nta ins the following information:
P Indicates the t ire is for passenger cars
(where app licab le)
2 55 Nominal tire width in mm of the tire
from sidewall edge to sidewa ll edge. In
general, the larger the number, the wider
the tire
45 Height/w idth ratio in percent (aspect ra-
t io)
R Tire construction: Radial
19 Rim diameter code (in inches)
104 Load rating code
H Speed rat ing letter code
X L (or "xl", "EXTRA LOAD" or "RF") Indicates
t h at the t ire is a "Reinforced" or an "E xt ra
Load " tir e
M+S (or "M/S") Indicates that the tire has
some mud and snow capabi lity
The tires could also have the information of
direction of rotatio n ¢
page 248 .
Tire manufacturing date
The manufact uring date is also indicated on
the tire sidewall (possibly on ly on the
inner
s ide of the wheel) :
"DOT ... 2213 ... " means, for example, the tire
was produced in the 22nd week of 2013.
Speed rating (letter cod e)
The speed rating letter code on the whee ls in­
dicates the maximum permissible road speeds
¢ .&. in Winter tires on page 264.
P up to 93 mp h (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)

chains because the vehicle will be ex­
tremely low. If you do drive with snow
chains on while the vehicle is at this lev­
el, the snow chains might severe ly dam­
age the wheelhouse and other parts of
the veh icle .
@ Tips
Where snow cha ins are mandatory oncer­
tain roads, this normally also applies to
veh icles with All Wheel Drive.
Wheel bolts
Wheel bolts mu st always be tigh tened to the
correc t torque .
The design of whee l bolts is matched to the
factory in sta lled r ims. If different rims are fit ­
ted, the correct wheel bolts with the right
length and correctly shaped bolt heads must
be used . This ensures that wheels are f itted
secure ly and that the brake system f unctions
correctly .
In certain circumstances, you may not use
wheel bolts from a d iffe rent vehicle -even if it
i s the same mode l
¢page 294.
A WARNING
Imprope rly tig hte ned or maintained whee l
bolts can be come loose causin g loss of
contro l, a co llision and serious persona l in­
jury .
- Alw ays keep the w heel bolts and the
th reads in the wheel hubs clea n so the
wheel bolts can turn easily and be prop­
er ly tightened .
- Never grease or oil the wheel bo lts and
the threads in the w heel h ubs. They can
become loose while driving if greased or
o iled, even if tightened to the specif ied
torque.
- Only use wheel bolts that belong to the rim being installed.
- Never use different whee ls bolts on your
vehicle .
- Always maintain the co rrect tightening
torq ue for the wheel bo lts to reduce the
Tire s an d wheel s 265
risk of a wheel loss. If the tighte ning tor­
que of t he wheel bolts is too low, they
can loosen and come out when the vehi­
cle is mov ing . If the tighte ning torque is
too h igh, the wheel bol ts and threads
can be damaged and the whee l can be­
come loose.
(I) Note
The specified torque for the whee l bolts is
90 ft lb ( 120 Nm) with a tole ranc e of± 7,4
ft lb(± 10 Nm). Torq ue whee l bolts diago­
nally. Afte r cha nging a whee l, the torq ue
must be checked as soon as possible wi th a
torque w rench -prefe rably by an au thor­
i z ed Audi dealer or qualif ied workshop .
Low aspect ratio tires
Your Audi is facto ry-eq uipped with low aspect
ratio tires. These tires have been thoro ughly
tested and been se lected specifically for your
model for their superb performance , road fee l
and handling under a variety of driving cond i­
tions . Ask your authorized Audi dealer for
more details.
The low aspect ratio of these t ires is ind icated
by a numeral of
55 or less in the tire's size
designation . The numera l rep resents the ratio
of the t ire's sidewall height in relation to its
t read width ex pressed in perce ntage. Conven ­
tion al tires have a he igh t/w idth ratio of 60 or
more.
The performance of low-aspe ct-ratio tire s is
particularly sensitiv e to improper infla tion
pres sure. It is therefore important that l ow
a spect ratio tires are inflated to the specified
pre ssure and that the inflation pressure is
regularly checked and maintained. Tire pres·
sures should be checked at least once a
month and always before a long trip
¢ page 254 , Checking tire pressure .
What you can do to avoid tire and rim
damage
Low aspect ratio tires can be damaged more
easily by impact w it h potholes , curbs, gul lies ..,.
•
•

hold on to the car to keep your ba lance
and take care not to slip.
Raising the vehicle
Th e ve hicl e must be li~ed with the jack first
before the wheel can be removed.
F ig. 224 Sill p anels : m arkin gs
Fig. 225 Sill: posi tioning th e vehicle jack
.. Activate the vehicle jack mode in the MMI:
I CAR I function button > Car sy stem s control
button
> Se rvicing & ch ecks > Air susp .:
jack mod e
> On.
.. Engage the par kin g brake to prevent your
vehicle from roll ing un intentionally.
.,. Move the
se lector lev er to p osition P .
.. Find the marking (imprin t) on the sill that is
nearest the wheel that w ill be changed
c::> fig. 224 . Behind the marking, there is a
lifting point on the si ll for the vehicle jack.
.. Turn the
veh icle jack located under the lift­
ing point on the sill to raise the jack until its
arm @i:>
fig. 225 is located under the des ­
ignated plast ic mount
c::> _&.. c::>(D .
.. Align the jack so that its arm @ c::> fig. 225
engages in the designated lifting point in
the door sill and the movable base @ lies
flat on the ground. The base @ must be
ver­
tical
under the lifting point @.
What do I d o now ? 275
.. Wind the jack up fu rther unti l the flat tire
comes off the ground
c::> _A .
Position the veh icle jack o nly under the desig­
nated lifting points on the si ll
¢fig. 224.
There is exactly one locat ion for eac h wheel.
The jack must not be positioned at any other location
c::, .&, i:>0 .
An un stable surface under the jack can cause
the ve hicle to slip off the jack . Always provide
a firm base for the jack on the ground . If nec­
essary place a sturdy board or simi lar s upport
under the jack. On
hard , sl ipper y su rf a ces
(such as tiles) use a rubber mat or similar to
prevent the jack from slipping
c::> .&, .
A WARNING
-You or your passengers co uld be in jured
while changing a wheel if you do not fo l­
low these safety pre cautions:
- Position the vehicle jack on ly at the
designated lifting points and align the
jack. Otherwise, the vehicle jack could s lip a nd cause an injury if it does not
have sufficient hold o n the vehicle.
- A soft or unstable surface under the
jack may cause the ve hicle to slip off
the jack . Always provide a firm base for
the jack on the ground. If necessa ry,
use a stu rdy board under the jack.
- On hard, slippery su rface (such as t iles)
use a rubber mat or simi la r to prevent
the jack from slipping.
- To help prevent injury to yo urself and
your passengers:
- Do not raise the vehicle until you are
sure the jack is securely engaged.
- Passengers must not remain in the ve­
hicle when it is jacked up.
- Make sure that passengers wait in a
safe place away from the veh icle and
well away from the road and traffic .
- Make sure jack position is correct, ad­
j ust as necessary and then cont inue to
raise the jack .
- Changes in temperature or load can af­
fect the height of the vehicle.