wheel alignment AUDI S8 2014 Owners Manual

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 .,.

2 70 What do I do now ?
Vehicle tool kit
Vehicle tool kit and jack
The vehicle tool kit is located in the luggage
compartment under the cargo floor cover .
Fig. 217 Luggage compartment: cargo floor cove r
folded upward
Fig . 218 Trunk lid: Vehicle tool k it
... Lift the cargo floor by the plastic handle.
... Hook the handle into the luggage compart­
ment weather strip
c> fig. 217.
... Remove the spare wheel to reach the vehicle
tool kit .
.,. Remove the foam p iece.
The onboard tool kit includes:
- Hooks to
remove the wheel covers* or wheel
hub covers
- Plastic hook to remove wheel bolt covers*
- Wheel bolt wrench
- Alignment p in for changing wheels
- Screwdriver with reversible blade
- Towing loop
- Jack
Before storing the jack, make sure it is wound
back down as far as it will go.
A WARNING
-Improper use of the vehicle jack can cause
serious personal injuries.
- Never use the screw driver hex head to
tighten wheel bolts, since the bolts can­
not attain the necessary tighten ing tor­
que if you use the hex head, potentially
causing an accident.
- The factory-supplied jack is intended on­
ly for your vehicle model. Under no cir­
cumstances should it be used to lift
heavy vehicles or other loads; you risk in­
juring yo urself.
- Never start the engine when the vehicle
is raised, wh ich could cause an acc ident.
- Support the vehicle securely with appro­
priate stands if work is to be performed
underneath the vehicle; otherwise, there
is a potential risk for injury.
- Never use the jack supplied with your
Audi on another vehicle, particularly on a
heavier one. The jack is only suitable for
use on the vehicle it came with.
(D Tips
- Some of the onboard items listed above
are provided on certain models only or
are optional extras .
- Before you can raise your vehicle using
the jack, you must activate the jacking
mode
c> page 275 .

276 What do I do n ow ?
(D Note
Do not lift the vehicle by the si ll. Position
the vehicle jack only at the designated lift­
ing points on the sill. Otherwise, your vehi­
cle will be damaged.
{l) Tips
The vehicle jack mode switches off auto ­
mat ica lly at speeds above 10 km/h .
Taking the wheel off/installing the spare
Follow these instructions step-by-step for
changing the wheel.
Fi g. 2 26 Cha ngin g a w hee l: u sing t he sc rewdrive r ha n·
dl e (w it h th e blade r emov ed) t o tu rn th e bolt s
F ig. 22 7 Chang ing a w hee l: a lig nm en t pi n inside t he
t op hole
After you have loosened a ll wheel bolts and
ra ised the ve hicle off the ground,
remove and
replace the wheel as follows:
Removing the wheel
.. Use the hexagonal socket in the screwdri v­
er handle
to comp letely remove the top·
most wheel bo lt and set it as ide on a
clean
surface ¢fig . 226 .
.. Sc rew the th readed end of the alignment
pin
from t he tool kit hand-tight into t he
empty bolt hole¢
fig. 22 7 .
.. Then remove the other whee l bolts as de­
scribed above.
.. Take off the whee l leaving the a lignment pin
in the bo lt hole
c::> (D .
Putting on the spare wheel
.. Lift the spare whee l and carefu lly s lide it
over the alignment p in to g uide it in place
¢ (D .
.. Use the hexagonal socket i n the screwdriver
ha ndle to screw in and tighten a ll whee l
bolts
slightly .
.. Remove the alignment pin and inse rt and
tighten the rem aining wheel bol t slightly
like the res t .
.. Turn the jack hand le co unter-cloc kwise to
lower the vehicle until the jack is fully re­
leased .
.. Use the wheel bo lt wrench to tighten all
wheel bo lts firm ly
c;, page 2 74 . Tighten
them
crosswise, from one bolt to the (ap ­
proximately) opposite one, to keep the
wheel ce nte red.
(D Note
When remov ing or installing th e whe el,
th e rim cou ld hit the b rake ro to r and dam­
age the ro tor. W ork caref ully and have a
s eco nd pers on h elp yo u.
{i) Tips
N eve r use the he xagona l socket in the han­
d le of t he s crewdr iver to lo ose n or t igh ten
t he wheel bo lts .
- P ull the revers ible blade from the screw­
dr iver be fore y ou use the hexagon al
s o ck et in t he han dle to tur n t he w heel
bolts.
- W he n m oun tin g ti res w ith
unidirectional
tread design
make sure t he tre ad pat­
t er n is poin ted t he righ t way
c;, page277.
- Th e wheel bolts shou ld be clean and easy
to t urn. Check for dirt an d corrosion on
the mating surfaces of both the w heel