2016 AUDI S4 winter tires

Emergency braking
In the event that the conventional brake system
fails or locks.
11-In an emergency, pull the switch @c:> page 85,
fig. 100
and continue to pull it to slow your ve­
hicle down with the parking brake.
11-As soon as you release the switch @ or acceler-
ate, the braking process stops.
If you pull the switch @and hold it above a
speed of about
5 mph (8 km/h), the emergency
braking function is initiated. The vehicle is braked
at all four wheels by activating the hydraulic
brake system. The brake performance is similar
to making an eme rgency stop c:>
.&..
In order not to activate the emergency braking by
mistake, an audible warning tone (buzzer)
sounds when the switch @ is pulled. As soon as
the switch @is released, or the accelerator pedal
is depressed, emergency braking stops.
A WARNING
Emergency braking should only be used in an
emergency, when the normal foot brake has
failed or the brake pedal is obstructed. Using the parking brake to perform emergency
braking will slow your vehicle down as if you
had made a full brake application. The laws of
physics cannot be suspended even with ESC
and its associated components (ABS, ASR,
EDS). In corners and when road or weather
conditions are bad, a full brake application
can cause the vehicle to skid or the rear end to
break away- risking an accident.
Speed warning system
Overview
The speed warning system helps you to keep your
driving speed below a set speed limit.
The speed warning system warns if the driver ex­
ceeds a previously stored maximum speed. A
;:; warning tone will sound as soon as the vehicle
0 ~ speed exceeds the set speed by about 3 mph
~ (3 km/h). At the same time, a warning symbol Lil ,...., v:, ,....,
Driving
appears in the display. The symbol's appearance
might be different in some models.
The speed warning system has one or two* warn­
ing thresholds that function independently of
each other and that have somewhat different
purposes:
Speed warning 1
You can use speed warning 1 to set the maximum
speed while you are driving. This setting will re­
main in effect until you turn off the ignition, as­
suming that you have not changed or reset the
setting .
The. (USA models) /. (Canada models)
speed wa rning symbol in the warning 1 display
appears when you exceed the maximum speed .
It
goes out when the speed falls below the stored
maximum speed.
The speed warning symbol will also go out if the
speed
exceeds the stored maximum speed by
more than about 2S mph
(40 km/h) for at least
10 seconds. The stored maximum speed is delet­
ed.
Setting speed warning 1 c:>
page 88.
Speed warning 2*
Storing warning 2 is recommended if you always
want to be reminded of a certain speed, for ex­
ample when you are traveling in a country that
has a general maximum speed limit, or if you do
not want to exceed a specified speed for winter
tires.
The. (USA models) /. (Canada models)
speed warning 2 symbol appears in the display
when you exceed the stored speed limit. Unlike
warning 1, it will not go out until the vehicle
speed drops below the stored speed limit.
Setting speed warning 2
c:>page 88.
(D Tips
Even though your vehicle is equipped with a
speed warning system, you should still watch
the speedometer to make sure you are not
driving faster than the speed limit.
87

Intelligent Technology
(D Tips
- If the . or
,~ n ind icator light only stays on
fo r a short time, you may continue driving.
- The dynamic steering* stability systems are
not available in the event of a system mal­
funct ion.
- Fo r additional information on dynamic
steering*, refer to¢
page 111 .
Driving with your
quattro
Applies to veh icles: w ith all-wheel drive
With all-wheel drive, all four wheels are driven.
General information
With all-whee l drive, power is distributed to all
four wheels . This happens automatically depend­
ing on your dr iv ing style and the road condit ions
at the time . See also ¢
page 177 .
A center differentia l distrib utes the driv ing power
variably to the front and rear axle. It works to­ gether with selective wheel torque control, which
activates when driving through curves
¢
page 178 . With the sport differentia l*, power
d istr ibut io n to the rear wheels is variable and can
be adj usted w ith d rive select¢
page 111.
The all -wheel drive concept is designed for high
engine power . Your veh icle is exceptionally pow­
erful and has excellent driving characterist ics
both under normal dr iv ing condit io ns and on
snow and ice. Always read and fo llow safety pre­
cautions ¢
A.
Winter tires
When d rivi ng in the winter, your vehicle with all­
wheel drive has an advantage, eve n with regular
tires. In winter road conditions it may be adv isa­
b le to mount w inte r ti res (or all-season tires) fo r
improved driveability and braking: these tires
must be mounted on all four wheels . See a lso
¢ page 232, Winter tires.
Tire chains
Where ti re chains are mandatory on certain
roads, this norma lly also applies to vehicles w ith
all -whee l drive ¢
page 233, Snow chains .
182
Replacing wheels /tires
Vehicles with all-wheel d rive must a lways have
tires of the same size. Also avoid t ires with differ ­
ent tread depths. For detai ls see page
¢ page 224, New tires or wheels .
Off-Road driving?
You r A udi does not have eno ugh ground clear­
an ce to be used as an off-road vehicle.
It is there­
fore best to avoid ro ugh tracks and uneven ter ­
rain as much as possib le. Also refer to
¢ page 185.
A WARNING
A lways adjust your dr iving to road and traffic
conditions . Do not let the extra safety afford­
ed by all-whee l drive tempt you into taking
extra risks .
- Although the all-wheel drive is very effec­
tive, always remember that braking capacity
is limited by ti re tract ion. You s hou ld there­
fore not drive at excessive speeds on icy or
slippe ry road s urfaces.
- On wet road surfaces, be careful not to dr ive
too fast because the front wheels could be­
gi n to slide on top of the water (aquaplan­
ing) . If th is should occur, you will have no
warning from a s udden increase in engine
speed as with a front-wheel drive vehicle.
Always drive at speeds which are suited to
the road conditions -risk of crash .
Energy management
Starting ability is optimized
Energy management controls the distribution of
electrical energy and thus optimizes the availa­
bility of electrical energy for starting the engine .
If a vehicle with a conventional energy system is
not driven for a long period of time, the batte ry is
discharged by id ling current consumers (e.g . im­
mobilizer). In ce rtain circumstances it can resu lt
i n the re being insufficient energy avai lab le to
start the engine .
Intelligent energy management in yo ur vehicle
hand les t he d istribution of elect rical energy. .,.

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.
.,.M ark 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.
(D Note
-Please note that summer and
winter tires are designed for
the conditions that are typical in those seasons. Audi recom­
mends using winter tires dur­
ing the winter months. Low
temperatures significantly de­ crease the elasticity of summ­
er tires, which affects traction
Wheels
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 rims
does not have sufficient corro­
sion protection for this and
could be permanently dam­ aged by road salt or similar
substances.
Tire designations
Fig. 188 T ir e designations on the side -
wall Ill>
217

Wheels
(D Tires for passenger vehicles
(if applicable)
P indicates a tire for a passenger
vehicle. T indicates a tire desig­
nated for temporary use.
@ Nominal width
Nominal width of the tire be­
tween the sidewalls 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
Size of the rim diameter in inches.
@ Load index and speed rating
The load index indicates the tire's
load-carrying capacity.
The speed rating indicates the maximum permitted speed
¢ & in
Winter tires on page 232.
"EXTRA LOAD", "xl" or "RF" indi­
cates that the tire is reinforced or
is an Extra Load tire.
Speed rat- Maximum permitted speed
ing
p
up to 93 mph (150 km/h)
Q up to 99 mph (99 .42 mi/h )
218
Speed rat- Maximum permitted speed
Ing
R
up t o 106 mph (170 km/h)
s up to 110 mph (180 km/h)
T up to 1 18 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)al
z above 149 mph (240 km/h)al
w up to 168 mph (167 .77 mi/h) al
y up to 186 mph (300 km/h)al
a) For tires above 149 mph (240 km/h),
tire manufacturers sometimes use the
code "ZR".
(j) US DOT number (TIN) and
manufacture date
The manufacture date is listed on
the tire sidewall (it may 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 tires
with the designation "AO" or "RO"
have been specially matched to
your Audi. When used correctly,
these tires meet the highest standards of safety and handling.
An authorized Audi dealer or au­
thorized Audi Service Facility will .,..

be happy to provide more infor­
mation.
® Mud and snow capability
"M/5 " or "M+S" indicates the tire
has character istics that make it
suitable 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 inc lude
steel, nylon, polyester and other
materials.
@ Maximum permitted load
This number indicates the max i­
mum load in kilograms and
pounds that the tire can carry.
@ Uniform tire quality grade
standards for treadwear,
traction and temperature resistance
Treadwear, traction and tempera­
ture ranges
c::> page 234 .
;;: @ Running direction
\:i ~ ...
'° V, ....
'° ....
The arrows indicate the running
direction of unidirectional tires .
Wheels
You must always follow the speci­
fied runn ing d irect ion
c::> page 244 .
@ Maximum permitted
inflation pressure
This number ind icates the maxi­
mum pressure to which a tire can
be inflated unde r normal operat ­
ing condit ions.
Glossary of tire and loading
terminology
Accessory weight
means the comb ined weigh t (in
excess of those standard items
which may be replaced) of auto­
matic transm ission, power steer­
ing , power brakes, power win­
dows, power seats, radio, and
heater, to the extent that these
items are available as facto ry-in­
stalled equipment (whether in ­
stalled or not) .
Aspect ratio
means the ratio of the heigh t to
the width of the tire in percent .
Numbers of 55 or lowe r indicate a
low sidewa ll for improved steer­
ing response and better overall
handling on dry pavement. .,.
219

Wheels
"XL" "xl" "EXTRA LOAD" or "RF" I I I
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 w ill have to p ur­
chase new tires to match the new rim diameter .
Rim size designation
means rim diameter and width.
Rim width
means nomina l distance between
rim flanges.
S idewall
means that portion of a tire be­
tween the tread and bead .
Speed rating (letter code)
means the speed at which a tire is
designed to be driven for extend ­
ed periods of time. The rat ings
range from 93 mph (150 km/h)
to 186 mph (298 km/h)
¢ table
on page 218.
You may not find
this information on all tires be ­
cause it is not requ ired by law.
222
The speed rating letter code,
where applicable, is molded on
the tire sidewall and ind icates the
maximum permissible road
speeds
¢ .&. in Winter tires on
page 232 .
Tire pressure monitoring
system*
means a system that detects
when one or mo re of a vehicle's
tires are underinflated and illum i­
na tes a low tire pressure warning
te lltale .
Tread
means that portion of a tire that
comes into contact w ith the road .
Tread separation
means pulling away o f the tread
from the t ire carcass .
Treadwear indicators (TWI)
means the projections within the
principal grooves designed to give
a visua l indication of the deg rees
of wear of the tread. Se e
¢ page 226, Treadwear indicator
for more information on measur-
ing tire wear. .,.

Wheels
Occupant loading and distri­bution for vehicle normal load
for various designated seating
capacities
Refer to the tire inflation pres­
sure label ¢
page 22 7, fig. 191
for the number of seating posi­
tions . Refer to the table
¢
page 228 for the number of
people that correspond to the ve­
hicle normal load.
New tires or wheels
Audi recommends having all work
on tires or wheels performed by
an authorized Audi dealer or au­
thorized Audi Service Facility.
These facilities have the proper knowledge and are equipped with
the required tools and replace­
ment parts.
.,.New tires do not yet have the
optimum adhesion properties. Drive carefully and at moderate
speeds for the first 350 miles (500 km) with new tires .
.,.Use tires of the same construc­
tion, size (rolling circumference)
and as close to the same tread
pattern as possible on all four
wheels .
224
.,.Do not replace tires individually.
At least replace both tires on the
same axle at the same time.
.,.Audi recommends that you use
Audi Original equipment tires. If
you would like to use different
tires, please note that the tires may perform differently even if
they are the same size ¢
,&.
.,. If you would like to equip your
vehicle with a tire/rim combina­
tion that is different from what
was installed at the factory, con­
sult with an authorized Audi dealer or authorized Audi Service
Facility before making a pur­
chase ¢&, .
The spare tire* is different from
the regular tires installed on the
vehicle -for example, if winter
tires or wide tires are installed -
then only use the spare tire* tem­
porarily in case of emergency and
drive carefully while it is in use. It
should be replaced with a regular
tire as soon as possible.
On
all wheel drive vehicles, all
four wheels must be equipped
with tires that are the same brand and have the same construction
and tread pattern so that the
drive system is not damaged by .,.

Wheels
Th at w eight ma y not safel y ex­
ce ed th e av a il a bl e c argo and
lugga ge loa d capa city c alcul at­
ed in St ep 4.
6 . If yo ur vehicle will b e to wing a
tr aile r, lo ad fr om your tr ailer
w ill b e tran sferred to your ve ­
h ic le . Con sult thi s manual to
dete rmin e how this re du ce s
the a vailable carg o and lug­
g age load capa cit y o f your vehi ­
cle .
.,.Ch eck th e tire s idewall
(¢pag e 217 J fig . 188) to deter­
min e the d esign ated load r ating
for a specifi c tire .
Wheel bolts and rims
Wheel bolts
W heel bol ts must be clean and loosen/t ighten
eas ily.
Rims
R ims with a bolted rim r ing * or w it h bolted whee l
covers * consist of mu ltiple pieces . These compo ­
nents were bolted together using specia l bolts
a nd a special procedu re. You must not repair o r
d isassemble th em¢ ,&..
_& WARNING
Whee l bolts tha t are t ightened o r repa ire d in­
correctly can become loose and resul t in loss
of vehicle control, which increases the risk of
an acc ident. For the correct t ightening specif i­
cat ion, refer to¢
page 241, After changing a
wheel.
- Always keep the wheel bolts and the
threads in the whee l hub clean and free of
grease.
- Only use wheel bolts that fit the rim.
232
- Always have damaged rims repaired by an
author ized Audi dealer or authorized Audi
Serv ice Facility. Neve r repa ir or disassemb le
r ims you rself, because this increases the risk
of an accident.
Winter tires
Win ter tires significantly improve the vehicle's
handling when dr iv ing in winter conditions. Be­
ca use of their const ru ct ion (w idth, compou nd,
t read pat te rn), summer t ires provide less t rac­
tion on ice and snow .
.,. Use winter tires on all four wheels.
.,. Onl y use winter tires that a re approved fo r yo ur
veh icle.
.,. Please note that t he maximum permit ted
speed may be lower with winter tires¢.&_ . An
authorized A udi dealer or authorized Audi
Serv­
ice Facility can inform you about the maximum
permitted speed for your tires .
.,. Check the tire pressure after insta lling wheels
¢ page 227.
The effectiveness of winter tires is reduced great­
l y when the tread is worn down to a depth of
0 .157 in (4 mm). The characteristics of winter
tires also decrease g reatly as the tire ages, re­
gard less of the rema ining t read .
_& WARNING
-
-Never d rive fas ter than the max imum pe r­
m itted speed for your tires. This could c ause
the t ires to hea t up too m uch. T his increases
the risk of an accident because it can cause the t ire to burst.
- Always ada pt your driving to the road and
traffic conditions. Drive carefu lly and reduce
your speed on icy or slippery roads. Even
winter t ires can lose tract ion on black ice.
@ For the sake of the environment
Reinsta ll summer tires a t the appropriate
time, beca use they provide better handling
when roads are free o f snow and ice. Summer
tires cause less road no ise, tire wear and fuel
consumpt ion.