2016 AUDI S4 four wheel drive

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

Inte llig ent Techn olo gy
In extreme cases, EDL automatically switches off
to help keep the brake on the braked wheel from
overheating. EDL will switch on aga in automati­
cally when conditions have returned to normal.
St eer ing r ecomm endation
The ESC helps to stabilize the vehicle by chang ing
the steering torque .
I n vehicles with dynamic steering*, ESC also
helps to stabilize the stee ring in critical situa­
tions.
Electron ic inter axle differential lock*/
sel ective whe el t orque control *
The electronic interaxle differentia l lock (front
wheel drive) or the selective wheel torque control
(a ll whee l drive) operates when driving through
curves . The front wheel on the inside of the curve
or both wheels on the inside of the curve are
braked selectively as needed. This allows more
precise driving in curves. The applicable system
may not activate when driving in wet or snowy
conditions.
.,&. WARNING
- The ESC and its in tegrated systems canno t
overcome the laws of phys ics. This is espe­
c ially important on slippery or wet roads.
If
the systems begin acting to stabilize your
Switching on /off
vehicle, you should immediately change
your speed to match the road and traffic
conditions. Do not let the increased safety
provided by these systems tempt you to
take risks. Doing so will increase the risk of
a loss of vehicle control, collision and seri­
ous personal injuries.
- Always adapt your speed to road, traffic and
weather conditions. The risk of los ing con­
trol of the vehicle increases when driving
too fast, espec ially through curves and on
slippery o r wet roads, and when driving too
close to vehicles up ahead . The ESC and its
integrated systems cannot always prevent
collisions -there is still a risk of accidents!
- Always accelerate with specia l care on even,
smooth surfaces such as those that are wet
or covered with ice and snow. The drive
wheels can spin even with these assistance
systems that cannot always help to reduce
the risk of loss of vehicle control.
@ Tips
- ABS and ASR only work correct ly when all
four wheels are equipped with identical
t ires. Different tire sizes can lead to a reduc­
t ion in engine power.
- You may hear noises when the systems de­
scribed are working.
ESC turns on automatically when you start the engine .
Fig. 173 Version A: lower center console,~ OFF button
The ESC is des igned to function in levels. Depend­
i n g on the level tha t is selected, the stabilization
function of the ESC is limited or switched off. The
178
Fig. 174 Version B: upper center console,~ OFF button
amount of stabilization contro l w ill diffe r de­
pending on the level.
"' N N N ~ 0:, m

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
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.

Wheels
If on ly one t ire is affected , the location o f that
tire will be indicated .
The tire pressures must be stored in t he Info tain­
men t sys tem ag ain each time the pressu res
change (switch ing between pa rtial and f ull load
pressure) or after changing or rep lacing a tire on
your vehicle ¢
pag e 236. The t ire pressu re moni ­
toring system only monitors the tire pressure you have stored. Refer to the tire pressure labe l for
the recommended tire pressure for your ve hicle
¢ page 227, fig.191 .
Tire tread circumference and vibration character­
istics can change and cause a tire pressure war n­
i n g if:
- the tire p ressure in one o r more tires is too low .
- the tire has struct ural damage.
- the tire was repl aced o r the tire p ressure was
changed and i t was not stored
¢ page 236 .
-the sp are t ire* or co llapsible spa re t ire* i s in-
st alled.
Indicator lights
[I] Loss of press ure in at leas t one tire 9 .6, .
Check the tires and rep lace o r repa ir if necessary .
Chec k/correc t th e p ressures o f all four tires and
s to re the pressure aga in in the In fota inment sys­
tem
¢ page 236 .
@m (Tir e Pr essure Monito ring System) Tire
pressure : Sy stem malfunction !. If @m
appears
a fte r swi tc hi ng t he igni tion on or wh ile dr iving
a nd the
[I] indicator light in the instrument cl us­
ter blinks for approximate ly one minute and then
stays on, there is system malfunction. Try to
sto re the correct tire pressures¢
page 236. If
the indicator light does turn off or tu rns on again
afte r a short period of t ime, dr ive to an a uth or­
ized Aud i dealer o r authorized Aud i Serv ice Fac ili­
ty immedia tely to have the malfunct ion correct­
ed.
_& WARNING
- If the tire pre ssu re indic ator appe ars in the
display, reduce your speed immedia te ly and
avoid any har d steer ing or braking maneu ­
vers. Stop as soon as possib le and check the
t ir es and t heir pressu re.
236
'
- The drive r is responsible fo r maintain ing the
correct tire pressu re . You m ust check the
tire pressure regularly .
- Unde r ce rtain con ditions (such as a spo rty
driving style, w inter condit ions or unpaved
roads), the pressure monitor indicato r may
be de layed.
- Do not use run-flat tires on your vehicle . U s­
ing them when no t perm itted can lead to
ve hicle damage o r acciden ts.
(D Tips
- The tire p ressure mon itor ing system can al­
so stop wo rking when there is an ESC mal­
function .
- Us ing snow chains may result i n a system
ma lfunction.
- The tires w ith the identif ication "AO" or
"RO"¢
page 224 have been matched w it h
you r Audi t ire pressu re monitoring system.
W e recommend tha t you use these tires.
Storing tire pressures
App lies to vehicles: with tire pressure mo nitori ng syste m
If the tire pressure changes or a tire is replaced,
it must be confirmed in the Infotainment sys­ tem .
.,. Make sure before stor ing t hat the t ire pressures
of all four tires meet the specified values and
are adapted to t he load
¢ page 22 7 .
.,. Switch o n the ign ition .
.,. Sele ct: the
I CARI fu nct io n but ton > Tir e pres­
s ure monitoring
con trol but ton. O r
.,. Sele ct: the
I CAR I funct ion but ton > Car Sys ­
tems*
cont rol b utton > Servicing & check s >
Tire pressure monito ring .
(D Tips
Do not s tore the tire pressures if snow chains
a re installed .