wheel AUDI S8 2016 Workshop Manual

Trailer mod e
conditions are unfavorable - particularly when
going downhill.
Red uce veh icle speed
imm ediatel y if the tra ile r
shows the s lightest sign of swaying.
Do not try
to stop the sway in g b y accele rating .
Observe speed lim its . In some areas, speeds for
ve hicl es towing tra ilers are lower than for reg ula r
veh icles.
A lways apply brakes early . When dr iving down­
h ill , sh ift into a lower gear to use the engine
b raking effect to slow the veh icle. Use of the
brakes a lone can cause them to overheat and fail.
Air suspension*
When driving with a tra iler, activate the trailer
mode of the air suspension . Switch the air sus­
pens ion tra iler mode on when you a re towing a
tra ile r. This will limit the regulat ion by the air
suspens ion while driving . Select in the MM I:
ICARI function button > (Car )* sys tem s control
button >
Vehicle setting s > Air su sp .: to wi ng >
On .
Coolant temperature
The coolan t temperature gauge¢ page 10 must
be observed carefully. The coo lant temperature
can increase if you drive on long inclines in a low
gear at high engine speeds. Reduce your speed
immed iate ly if the LEDs in the top part of the dis­
p lay turn on.
For more information about indicator lights, re­
fer to.
¢page 15.
A WARNING
Anyone not properly restrained in a moving
vehicle is at a much greater risk in an acci­
dent. Never let anyone ride in your car who is
not properly wearing the restraints provided
by Audi.
Trailer mode notes
Important to know
Your vehicle hand les different ly when towing a
trai ler because of the additiona l weight and dif­
ferent weight distr ibut ion. Safety, performance
204
-
and economy will g reatly depend on how carefu l­
l y you load your trai ler and operate your rig .
Befo re yo u actually tow yo ur t railer, pract ice
turning, stopping and backing up in an area away
from traffic. Keep practicing unti l you have be ­
come complete ly familiar with the way your vehi­
cle-tra iler combination behaves and responds .
Backing up is diff icult and requ ires practice.
Backing up with a trailer genera lly req uires steer ­
ing action opposite to that when backing up your
vehicle witho ut a trailer .
Maintain a greater distance between yo ur vehicle
and the one in front of you. You will need more
room to stop . To compensate for the trailer, you
will need a larger than normal turning radius .
When passing, remember tha t you canno t accel­
erate as fast as you normally wou ld because of
the added load . Make sure you have enough room
to pass. After passing, allow p lenty of room for
your trailer before changing lanes again.
Avoid jerky starts, sharp turns or rapid lane changes.
(D Tips
- Do not tow a trailer du ring the break-i n pe ri­
od of your vehicle.
- If you tow a tr aile r, your A udi may requi re
more frequent ma intenance due to the ex­
tra load ¢
page 281.
Parking on a slope
Do not park on a slope with a trailer . If it cannot
be avoided, do so only after doing the following:
When parking:
.,. App ly the foot brake.
.,. Have someone p lace chocks unde r both the ve­
hicle and the trailer wheels .
.,. With chocks in place, slowly release the brakes
until the wheel chocks abso rb the load .
.,. Turn the whee ls towards the curb.
.,. App ly the parking brake .
.,. Select the P selector lever posit ion.

When restarting after parking:
"'Apply the foo t brake.
"' St art the engi ne .
"' Se lect the D selector leve r position.
"' Release the parking brake an d slow ly pull out
and away from t he wheel choc ks .
"' Stop and have someone retrieve t he wheel
chocks .
(D Tips
If you move the selector lever of the a utomat­
ic transm ission to P before applying t he park­
ing brake and before block ing t he wheels, you
may have to use mo re force late r to move t he
lev er out of th e P position .
Trailer mode
205

& WARNING
-Only wash the vehicle when the ignition is
off and follow the instructions from the car
wash operator to reduce the risk of acci­
dents.
- To reduce the risk of cuts, protect yourself
from sharp metal components when wash­
ing the underbody or the inside of the wheel
housings.
-After washing the vehicle, the braking effect
may be delayed due to moisture on the
brake rotors or ice in the winter . The brakes
must be dried first with a few careful brake
applications.
{[) Note
-If you wash the vehicle in an automatic car
wash, you must fold the exterior mirrors in
to reduce the risk of damage to the mirrors.
Power folding exterior mirrors* must only
be folded in and out using the power folding
function.
- To prevent paint damage, do not wash the
vehicle in direct sunlight.
-
Care and cleaning
-To reduce the risk of damage to the surface,
do not use insect removing sponges, kitchen
sponges or similar items.
- Matte finish painted vehicle components:
- To reduce the risk of damage to the sur-
face, do not use polishing agents or hard
wax.
- Never use car wash cycles that apply pro­
tective wax. It can destroy the matte fin­
ish effect.
- Do not place any stickers or magnetic
signs on vehicle parts painted with matte
finish paint. The paint could be damaged
when the stickers or magnets are re­
moved .
@ For the sake of the environment
Only wash the vehicle in facilities specially de­
signed for that purpose. This will reduce the
risk of dirty water contaminated with oil from
entering the sewer system.
Cleaning and care information
When cleaning and caring for individual vehicle
components, refer to the following table. The in­
formation contained there is simply recommen­
dations. For questions or for components that are not
listed, refer to an authorized Audi dealer
or a qualified workshop. Also follow the informa­
tion found in
~ ,&. .
Cleaning exterior
Component Situation Solution
Wiper blades
Dirty ~ page 55, Cleaning windshield wiper blades
Headlights/ Dirty Soft sponge with a mild soap solution a>
tail lights
Sensors/
Dirty Sensors: soft cloth with a solvent-free cleaning product
camera lenses Camera lenses: soft cloth with an alcohol-free cleaning sol-
ution
Snow/ice Hand
brush/solvent-free de-icing spray
Wheels Road salt Water
Brake dust Acid-free special cleaning solution
Exhaust tail Road salt
Water, cleaning solution suitable for stainless steel, if nee-
pipes essary
207

Wheels
Wheels
Wheels and Tires
General information
~check your tires regularly for
damage (punctures, cuts, cracks
and bulges). Remove foreign ob­
jects from the tire tread.
~ If driving over curbs or similar
obstacles, drive slowly and ap ­
proach the curb at an angle.
~ Have faulty tires or rims re­
placed immediately.
~ Protect your tires from oil,
grease and fuel.
~ Mark tires before removing
them so that the same running direction can be maintained if
they are reinstalled .
~ Lay tires flat when storing and
store them in a cool, dry location
with as little exposure to light as possible.
(i}) Note
-Please note that summer and
winter tires are designed for
the conditions that are typical i n those seasons. Audi recom­
mends using winter tires dur­
i ng the winter months. Low
temperatures significantly de­ crease the elasticity of summ­
er tires, which affects traction
236
and braking ability. If summer
tires are used in very cold
temperatures, cracks can form on the tread bars, resulting in
permanent tire damage that
can cause loud driving noise
and unbalanced tires.
-Burnished, polished or chromed rims must not be used in winter driving condi­
tions. The surface of the r ims
does not have sufficient corro­
sion protection for th is and
could be permanently dam­
aged by road salt or similar
substances.
Tire designations
Fig. 205 Tire specifi cation codes on the
sidewall of a tire .,._

(D Tires for passenger vehicles
(if applicable)
P indicat es a tir e for a p asse ng er
vehi cle. T indi cates a tire de sig­
nated for tempor ary us e.
@ Nominal width
Nominal width of the tire be­
tween the sidew alls in millime­
ters. In general: the larger the number, the wider the tire.
@ Aspect ratio
Height /width ratio expressed as a
percentage.
@ Tire construction
R indicates a radial tire.
® Rim diameter
Siz e of the rim diameter in inches.
@ Load index and speed rating
The load ind ex indi cates the tire' s
lo ad-ca rry in g ca pacity.
The speed rating indicates the maximum permitted speed¢.&
in
W inter tires o n page 251 .
"EXTRA LOAD", "xl" or "RF" indi­
cate s that the tire i s reinfor ced or
is an Extra Load tire.
Speed rat- Maximum permitted speed
ing
p
up t o 93 mph ( 150 km/h)
Q up to 99 mph (160 km/ h)
Wheels
Speed rat- Maximum permitted speed
ing
R up to 106 mph (170 km/h)
s u p to 11 0 mph ( 180 km/h)
T up to 118 mph (190 km/h)
u u p to 124 mph ( 200 km/h)
H up to 130 mph (210 km/h)
V up to 14 9 mph (2 40 km/h)al
z above 149 mph (240 km/h)al
w up to 168 mph (270 km/h)al
y up to 186 mph (300 km/h)al
a) For tir es ab ove 149 mph (2 40 km/h),
t ir e man ufact ure rs sometimes use the
co de "Z R".
(j) US DOT number (TIN) and
manufacture date
The m anufac ture date i s listed on
the tire sidewall (it ma y only ap­
pear on the inner side of the tire):
DOT ... 2215 ...
means, for example , that the tire
was produced in the 22nd week of
the year 2015.
@ Audi Original equipment
tires
Audi Original equipment tire s
with th e designation "AO " or "RO"
have been sp ec ially matched to
your Audi. When used correct ly,
these t ires meet th e highest
s tandar ds of safety and h andling.
Your authorized Audi dealer will
be happy to provide more infor­
mation .
237

Wheel s
® Mud and snow capability
"M/5" or "M+S" indicates the tire
has characteristics that make it
suitab le for driving on mud and
snow. ~ indicates a winter tire.
@ Composition of the tire cord
and materials
The number of plies indicates the
number of rubberized fabric lay­
ers in the tire . In general : the
more layers, the more weight a
tire can carry. Tire manufacturers
must also specify the materials
used in the tire. These include
steel, nylon, polyester and other materials.
@ Ma ximum permitted load
This number indicates the maxi­
mum load in kilograms and
pounds that the tire can carry.
@ Uniform tire quality grade
standards for treadwear,
traction and temperature resistance
T readwear, traction and tempera­
ture ranges ~
page 253.
@ Running direction
The arrows indicate the running
direction of unidirectional t ires.
You must always follow the speci-
238
fied running direction
~ page 264 .
(8) Maximum permitted
inflation pressure
This number indicates the maxi­
mum pressure to which a tire can
be inflated under normal operat­
ing condit ions.
Glossary of tire and loading
terminology
Accessory we ight
means the combined weight (in
excess of those standard items
which may be replaced) of auto­ matic transmission, power steer­
ing, power brakes, power win­
dows, power seats, radio, and
heater, to the extent that these
items are available as factory -in ­
stalled equipment (whether in­
stalled or not).
Aspect rat io
means the rat io of the height to
the width of the tire in percent.
Numbers of 55 or lower indicate a
low sidewall for improved steer­
ing response and better overa ll
handling on dry pavement.

Bead
means the part of the tire that is
made of steel wires, wrapped or
reinforced by ply cords and that is
shaped to fit the rim.
Bead separation
means a breakdown of the bond
between components in the bead.
Cord
means the strands forming the
plies in the tire.
Cold tire inflation pressure
means the tir e pressure recom­
mended by the vehic le manufac­
turer for a tire of a designated
size that has not been driven for
more than a couple of miles (kilo­
meters) at low speeds in the
three hour period before the tire pressure is measured or adjusted .
Curb weight
means the weight of a motor ve ­
hicle with standard equipment in­
c luding the maximum capacity of
fuel, oi l, and coolant, a ir condi­
tioning and add itional weight of
optional equipment.
E xtra load ti re
means a tire designed to operate
at higher loads and at h igher in -
Wheels
flation pressures than the corre­
sponding standard tire . Extra load
tires may be identified as "XL",
" xl", "EXTRA LOAD", o r "RF" on
the sidewal l.
Gross Axle Weight Rating
( " GAWR")
means the load -carrying capacity
of a single axle system, measured
at the tire-ground interfaces .
Gross Vehicle Weight Rating
("GVWR ")
means the max imum total loaded
weight of the vehic le.
Groove
means the space between two ad­
jacent tr ead ribs .
Load rating (code)
means the max im um load tha t a
tire is rated to carry fo r a g iven in­
flat ion pressure . You may not find
this informat ion on all tires be­
cause it is not requ ired by law.
Maximum load rating
means the load rating for a tire at
the maximum pe rmissible infla­
tion pressure for that tire.
Maximum loaded vehicle
weight
means the sum o f:
239
..

Wheels
(a) Curb weight
(b) Accessory weight
(c) Vehicle capacity weight, and
(d) Production options weight
Maximum (permissible )
inflation pressure
means the maximum cold infla­
tion pressure to which a tire may be inflated. Also called "maxi­
mum inflation pressure ."
Normal occupant weight
means 150 lbs . (68 kilograms)
times the number of occupants
seated in the vehicle up to the to­
ta l seating capacity of your vehi­
c le .
Occupant distribution
means distribut ion of occupan ts
in a vehic le .
Outer diameter
means the overall diamete r of an
inflated new tire.
Overall width
means the l inear distance be ­
tween the exter iors of the side­
walls of an infla ted tire , including
elevations due to labeling , deco­
rations, or protective bands or
r ibs.
2 4 0
Ply
means a layer of rubber -coated
pa rallel cords.
Production options weight
means t he comb ined we ight of
those insta lled regular production
options weighing over 5 lbs . (2 .3
kg) in excess of those standard
items which they replace , not pre­
viously considered in curb weight or accessory weight, inc luding
heavy duty brakes, ride levelers,
roof rack, heavy duty battery, and
special trim.
Radial ply tire
means a pneumatic tire in which
the ply co rds that extend to the
beads are laid at subs tantially 90
deg rees to the centerline o f the
tread .
Recommended inflation
pressure
see~ page 239, Cold tire infla­
tion pressure.
Reinforced tire
means a tire designed to operate
at highe r loads and at h igher in­
flat ion pressures than t he corre­
spond ing standa rd tire . R ein ­
forced tires may be identified as .,.

-
"XL" "xl" "EXTRA LOAD" or "RF" ' ' '
on the sidewall.
Rim
means a metal support for a tire
or a tire and tube assembly upon
which the tire beads are seated .
Rim diameter
means nominal diameter of the
bead seat. If you change your
wheel size, you will have to pur­
chase new tires to match the new
rim d iameter.
Rim size designation
means rim diameter and width.
Rim width
means nominal distance between
r im flanges.
Sidewall
means that portion of a tire be ­
tween the tread and bead .
Speed rating (letter code )
means the speed at wh ich a tire is
designed to be driven for exten d­
ed periods of t ime . The ratings
range from 93 mph (150 km/h)
to 186 mph (298 km/h)
¢ table
on page 237.
Yo u may not find
ci this information on all tires be-:c
; cause it is not required by law. V,
-"' -
Wheels
T he speed rating letter code,
where applicable, is molded on
the tire sidewall and indicates the
maximum pe rmissible road
speeds
¢ & in Winter tires on
page 251 .
Tire pressure monitoring
system*
means a system that detects
when one or more of a vehicle's
tires are underin flated and illum i­
na tes a low tire pressure wa rning
telltale.
Tread
means that port ion of a tire that
comes into contact with the road.
Tread separation
means pulling away of the tread
from the tire carcass .
Treadwear indicators (TWI)
means the projections within the
principal grooves designed to give
a visua l indication of t he degrees
of wear of the tread . See
¢ page 245, Treadwear indicator
for mo re info rma tion on measu r-
ing tire wear. .,.
241

Wheels
Uniform Tire Quality Gr ading
is a tire information system devel ­
oped by the United States Nation­
al Highway Traffic Safety Admin­
istration (NHTSA) that is designed
to help buyers make relative com­ parisons among tires. The UTQG
is not a safety rating and not a
guarantee that a tire will last for
a prescr ibed number of miles
(kilometers) or perform in acer­
tain way. It simply gives tire buy­
ers additional information to
combine with other considera­
tions, such as price, brand loya lty
and dealer recommendations. Un­
der UTQG, tires are graded by the
tire manufacturers in three areas:
treadwear , traction, and tempera­
ture resistance . The UTQG in for­
mation on the tires, molded into
the sidewalls.
U.S. DOT Tire Identification
Number (TIN)
This is the tire's "serial number" .
It begins with the letters "DOT"
and indicates that the tire meets
all federal standards. The next
two numbers or letters indicate
the plant where it was manufac ­
tured, and the last four numbers represent the
week and year of
manufacture . For example,
24 2
DOT ... 2215 ...
means that the tire was produced
in the 22nd week of 201 5. The
other numbers are marketing co­
des that may o r may not be used
by the tire manufacturer . This in­
formation is used to contact con­ sumers if a tire defect requires a
recall.
Veh icle capac ity weight
means the rated ca rgo and lug­
gage load pl us 150 lbs . (68 k ilo­
grams) times the vehicle's desig ­
nated seating capacity .
Vehicle maximum load on the
tire
means that load on an ind ividual
tire that is determined by distrib ­
uting to each axle its sha re of the
maximum loaded veh ic le we ight
and dividing by two.
Vehicle normal load on the tire
means that load on an individual
tire that is determi ned by distrib­
uting to each axle its share of the
curb weight, accessory weight,
and normal occupan t weight (dis­
tributed in accordance with
c::> ta ­
ble on page 248) and dividing by
two .
~