2014 AUDI A5 COUPE four wheel drive

182 Intelligent technology
-Always accelerate with specia l care on
even, smooth surfaces s uch as those that
are wet or covered with ice and snow.
The drive whee ls can spin even with
these ass istance systems that canno t al­
ways help to reduce the risk of loss of ve­ hicle control.
(i_) Tips
-ABS and ASR on ly wor k correctly when
all four wheels a re eq uipped w ith ident i-
Switching on/off
cal tires. Diffe ren t tire sizes can lead to a
reduction in engine power.
- Yo u may hear noises when the systems
descri bed are worki ng.
- If the in dicator ligh t
bl or t!lJ (USA
models)/ [IJ (Ca nada models) ap pears,
there may be a malfunction
¢page 18,
¢page 19.
ESC turns on automatically when you start the engine.
Fig . 15 3 Version A: lower center console,~ OFF but·
ton
The ESC is designed to function in levels . De­
pending on the leve l that is selected, the sta­
b ili zat io n function of the ESC is limited or
switched off. The amount of stabilizat ion con­
trol will d iffe r depend ing on the level.
The following situations are exceptions where
it may be useful to switch on sport mode to
allow the whee ls to spin:
Fig. 154 Versio n B: uppe r ce nter console,~ OFF but·
to n
-Rocking the vehicle to free it when it is st uck
- Driving in deep snow or on loose g round
- Dr iving with snow c hains

overhea t red ucin g the e ffec tiveness of
t h e ent ire brake system.
- Failure of one brake circuit will impair
the bra king capability resulting in an in­
creased stopp ing distance. Avoid driv ing
the vehicle and have it towed to the near­ est author ized Audi dealer or qualified
wor kshop .
- Never let the vehicle roll to a stop w ith
the engine shut off.
- If the brake booster is not work ing, the
brake pedal must be pressed considera­
bly harder to make up for the lac k of
booster assistance.
Electro-mechanical
power assist, dynamic
steering
The electro-mechanical power assist helps
the driver when steering.
Power steering adapts electronically based on
the vehicle speed.
Indicator light s and messages
• Steering defecti ve! Do not drive vehicle!
If th is ind icator light tu rns on and stays on
and th is message appears, t he power s teeri ng
may have f ailed.
Do
not co ntin u e d riving . See yo ur autho rized
Aud i dea ler o r a qua lifi ed r epai r fac ility for as­
sis tance .
':rj Dynam ic steering: Sy stem fault! You can
continue driving
If the indicator light t urns on and the mes­
sage appears, the steer ing may be more diffi­
cult to move or more sensitive than usual. The
steer ing wheel may also be at an angle whe n
d riving st raight .
Drive s low ly to your au thor ized Audi dealer or
qua lified workshop to have the malfunction
corrected.
'y.ij Dynam ic steering : initializing
Int ellig ent technolog y 185
If this drive r message appea rs and the indica ­
tor lig ht is f lashing on the instrument panel,
dynamic steer ing * is being rein itia lized. After
starting the engine, the steering wheel will move s light ly. Re- initiali zation might be nec­
essary if the steering wheel was moved hard
to the left and right wh ile the vehicle was not
moving . Th e display goes out as soo n as ini ti­
ali zation is comple te .
A WARNING
H ave the dy namic s tee ring * system mal­
f u nction repa ired as soon as possible by an
authorized Audi dealer or qualified work ­
shop - risk of acc ident !
(D Tips
- If the . or l;rj indic ator l ight only st ays
on fo r a short time, you may continue
dr iving.
- T he dynamic s teering* s tabilit y systems
are not availab le in the even t of a system
ma lfunction.
- F or ad ditiona l information on dynamic
steering *, refer to ¢page 104 .
-
Driving with your
quattro
Applies to vehicles: with all-wheel drive
With all-wheel drive, all four wheels are driv­
en .
General informati on
With a ll-wheel d rive, power is distrib uted to
all four wheels. This happens automatically depending on your driving style and the road
cond it ions at the time. See also¢ page 180 .
A center d ifferential distributes the driving
power variably to the front and rear ax le. It
wor ks together with selective wheel torque
control, wh ich activates when dr iv ing t hrough
curves Qpage 181. With the sport differen­
t ia l*, power d istr ibut io n to the rea r wheels is
var iable a nd can be adjusted w ith dr ive se lect
¢ page 10 4.
IJII>
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186 Intelligent technology
The all-wheel drive concept is designed fo r
high engine power. Yo ur vehicle is exception ­
ally powerful and has exce llent dr iving charac­
te ristics both under normal driving conditions
and on snow and ice . Always read and follow
safety precautions
c:> ,&. .
Winter t ires
When driving in the winte r, your ve hic le with
a ll-whee l drive has an advantage, even with
regular t ires. In winter road conditions it may
be adv isable to mount winter tires (or all-sea­
son t ires) for improved dr iveability a nd brak­
ing: these t ires must be mounted on
all four
wheels . See also i=>page 237, Winter tires.
Tire chain s
Where tire cha ins are mandatory on certain
roads, th is normally a lso applies to vehicles
with a ll-wheel drive
c:> page 238, Snow
chains.
Replacing wheels /ti res
Vehicles w ith all -wheel drive must a lways
have tires o f the same size. Also avoid t ires
with d iffe rent tread depths . For details see
page
c:;> page 2 33, New tires and replacing
tires and wheels .
Off-Road driving?
Your Audi does not have enough ground clear­
ance to be used as an off-road veh icle.
It is
therefore best to avoid rough t racks and un­
even terrain as much as possible . Also refe r to
<=;> page 188.
A WARNING
Always adjus t you r d rivi ng to roa d and tr af­
fic co ndition s. Do no t let the e xt ra s afety
a ff orde d by all -whee l dr ive tem pt you in to
taking extra risks .
- Alt hough the all-whee l dr ive is very e f­
f ec tive, a lways remember tha t br aking
ca pacity is limited by t ire traction . Yo u
sho uld the refore not dr ive at excessive
speeds on icy or s lippery road surfaces.
- On wet road s urfaces, be careful not to
dr ive too fast because the front wheels co
uld begin to slide o n top of the water
(aquaplaning). If t his should occur, you
will have no warn ing fr om a s udden in­
crease in eng ine speed as w ith a front­
wh eel drive veh icle . Always dr ive at
speeds wh ich are su ited to the road co n­
di tions -risk of crash.
Energy management
Starting ability is optimized
Energy management controls the distribution
of electrical energy and thus optimizes the
availability of electrical energy for starting the engine.
If a vehicle wi th a conventiona l ener gy sys tem
is not driven for a long per io d of time, the bat­
te ry is discharged by idling current consumers
(e .g. immobilize r). In certain circumstances it
can res ult in there being insufficient energy
available to start the eng ine .
Intelligent energy management in your vehi­
cle hand les the dist ribution o f electr ica l ener­
gy. Start ing ability is markedly improved and
t h e life of the battery is extended .
Bas ica lly, energy management consists of
battery diagnosis , idling current manage­
ment
and dynamic energy management .
Battery diagnosis
Battery diagnosis contin uously de termines
t h e state of the battery . Sensors determine
batte ry voltage, battery current and battery
temperature. This determines the current
state of charge and t he power of t he battery .
Idling current management
Idling current management reduces energy
consumption while t he vehi cle is standing.
With the ign ition sw itched off, it controls the
energy supply to the various electrica l compo­
nen ts. Data from battery diagnos is is cons id­
ered .
Depend ing on the battery's state of charge,
individ ual consumers are gradually turned off ..,.

Speed rating (letter code)
means the speed at wh ich a tire is des igned to
be driven for extended periods of t ime . The
ratings range from 93 mph (150 km/h) to
186 mph (298 km/h)
¢page 234. You may
not find this information on all tires because
it is not required by law.
The speed rating letter code, where applica­ b le, is molded on the tire sidewall and indi­
cates the maximum permissible road speeds
¢ &. in Winter tires on page 238.
Tire pressure monitoring system*
means a system that detects when one or
more of a vehicle's tires are underinflated and
illuminates a low tire pressure warn ing te ll­
tale .
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 pr incipal
grooves designed to give a visual ind ication of
the degrees of wear of the tread. See
¢
page 232, Tread Wear Indicator (TWI) for
mo re inf ormat ion on measuring tire wear.
Uniform Tire Quality Grading
is a tire information system developed by the
United States National Highway Traffic Safety
Admin istration (N HTSA) that is designed to
help buyers make relative comparisons among
tires . Th e U TQG is not a safety rating and not a
g ua ran tee that a tir e will last for a prescribed
number of mi les (kilometers) or perform in a
certain way. It simply gives tire buyers addi ­
tional information to combine with other con-
Tires and wheels 225
siderations, such as price, brand loyalty and
dealer recommendations. Under UTQG, tires
are graded by the t ire manufacturers in three
areas : treadwear, traction, and temperature
resistance. The UTQG informat ion 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 federa l standards. The next two
numbers or letters indicate the plant where it
was manufactured, and the last four numbers
represent the week and year of manufacture.
For example,
DOT ... 2213 ...
means that the tire was produced in the 22nd
week of 2013. The other numbers are market­
ing codes that may or may not be used by the
tire manufacturer. This information is used to
contact consumers if a tire defect requires a
recall.
Vehicle capacity weight
means the rated cargo and luggage load plus
150 lbs . (68 k ilograms) times the vehicle's to­
tal seating capacity as listed on the label lo­
cated on the driver's side B -pillar .
Vehicle maximum load on the tire
means that load on an individual tire that is
determined by distributing to each axle its
share of the maximum loaded vehicle weight
and dividing by two.
Vehicle normal load on the tire
means that load on an individual tire that is
determined by distributing to each ax le its
share of the curb weight, accessory weight,
and normal occupant weight (distr ibuted in
accordance with table below¢
page 226)
and dividing by two.
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232 Tires and wheels
to determine how this re­duces the available cargo
and luggage load capacity of
your vehicle.
.,.Check the tire sidewall
(¢ page 233, fig. 172) to de­
termine the designated load rating for a specific tire.
Tire service life
The service life of tires depends on a lot of
different things including proper installation
and balancing, correct tire pressure and driv·
ing style.
Fig. 170 Tire tread: tread wear indicators (TWI)
_____ ___,.J)
Fig. 171 Rotating tires for more even wear
Tread Wear Indicator (TWI)
The original tires on your vehicle have
1/16 inch (1.6 mm) high "wear indicators"
c.> fig. 170 running across the tread. Depend·
ing on the make , there will be six to eight of
them evenly placed around the tire. M ar ks on
the tire sidewall (for example "TWI" or other
symbols) indicate the positions of the tread
wear indicators. Worn tires must be replaced. Different
figures may apply in other countries
¢& .
Tire pressure
Incorrect tire pressure causes premature wear
and can cause sudden tire blow-out. For this
reason, tire pressure must be checked at least
once a month
¢ page 228.
Driving style
Driving fast around curves, heavy acceleration
and hard braking increase tire wear .
Rotating tires for more even wear
For all four tires on your vehicle to have the
same service life, we recommend that the
front and rear tires are rotated according to
the tire manufacturer's suggested tire rota­
tion intervals. Please remember the follow­
ing :
- Tire rotation intervals may differ from the
vehicle service intervals outlined in your
Maintenance and Warranty Booklet .
- The longer one tire is used in one location
on the vehicle, the more it wears at certain
points; therefore, we recommend that you
follow the tire manufacturer's suggested
tire rotation intervals.
- Vehicles with front-wheel drive experience
more tread wear on the front wheels com­
pa red to all wheel drive (quattro).
- Please rotate tires as shown¢
fig. 171.
- Extra care must be taken when rotating di-
rection-specific tires ¢
page 249.
Wheel balancing
The wheels on new vehicles are balanced .
However, various situations during everyday
driving can cause them to become unbal­
anced, resulting in vibrations you can usually
feel through the steering wheel.
Unbalanced wheels must be rebalanced to
avoid excessive wear on steering, suspension
and tires. A wheel must also be rebalanced
when a new tire is installed. .,.

236 Tire s and whee ls
- All four wheels must be fitted with radia l
t ires of th e same ty pe, size (r olling c ir­
cumfe rence) and the same tread pattern.
Dr iv in g with different tires reduces veh i­
cle handling and can lead to a loss of
c o ntrol.
- If the spare tire is not the same as the
t ires that are mounted on the veh icle -
for example with winter tires - on ly use
the spare tire for a short period of time
and dr ive with extra care. Refit the no r­
ma l road whee l as soon as safely possi ­
ble.
- Never drive faster than the maxim um
speed for which the tires on your vehicle
are rated because tires that are driven
faster than their rated speed can fail
sudden ly.
- Overloading ti res cause heat build-up,
sudden tire failure, including a blowout
and sudden deflation and loss of control.
- Temperature grades app ly to tires that
are properly inflated and not over or un­
derinflated.
- For technical reasons it is not a lways
poss ible to use wheels from other
vehicles -in some cases not even wheels
from the same vehicle model.
- If you install wheel tr im discs on the ve­
hicle whee ls, make sure that the air flow
to the brakes is not blocked . Reduced air­
flow to the brakes can them to overheat,
increasing stopping d istances and caus­
ing a collision.
- Run flat t ires may on ly be used on
vehicles that we re eq uipped w ith them
at the factory. The vehicle must have a
chassis des igned for r un flat t ires and a
factory-installed tire press ure monito r­
ing system * that indicates a loss of tire
pressure. Incorrect use of run flat tires
can lead to vehicle damage or accidents.
Check with an authorized Audi dea ler or
t ire spec ialist to see if you r vehicle can be
equipped with run flat tires .
If run flat
t ires a re used, they must be insta lled on
all four wheels. M ixing tire types is not
permitted.
(D Note
- For technical reasons, it is not generally
poss ible to use the wheel rims from oth­
er veh icles. T his can hold tr ue for wheels
of the same vehicle type.
- If the spare tire is different from the tires that you have mounted on your ve­
hicle (for example winter tires or wide
profi le tires), then use the spare tire for a
short period of time only and drive w ith
extra care. Replace the flat tire w it h the
ti re mat ching the othe rs on your vehicle
as soon as possi ble.
- Never d rive without the valve stem cap.
The v alves co uld get damaged.
@ For the sake of the environment
Dispose of o ld tires in accordance w ith the
l ocal requirements.
Uniform tire quality grading
- Tread wear
- Tra ction AA A B (
- Temperature ABC
Quality grades can be found where applicable
on the t ire s ide wall between tread shoulder
and maximum section width
c> page 233,
fig . 172 .
For e xample: Tread wear 200 , Traction AA ,
Temperature A .
All passenger car ti res must conform to Feder­
al Safety Requirements in add ition to these
grades .
Tread w ear
The tread wear g rade is a comparative rating
based on the wear rate of the tire when tested
u nder contro lled conditions on a specified
government test course.
F o r example, a tire graded 1S0 wo uld wear
one and one ha lf (11/2) times as well on the
government course as a ti re graded 100. ..,_

The relative perform a nee of ti res depends
upon the actua l conditions of their use, how ­
ever, and may depart sign ificantly from the
norm due to var iat ions in dr iving habits, serv­
ice practices and differences in road character­
istics and climate .
Trac tion
The traction grades, from highest to lowest,
are AA, A, Band
C. Those grades represent the
tire's ability to stop on wet pavement as measured under controlled cond itions on
specified government test surfaces of asphalt
and concrete . A tire marked C may have poor
traction performance ¢,&. .
Temp erature
The temperature grades are A (the h ighest),
B, and
C, representing the t ire's resistance to
the generat ion of heat and its ability to dissi ­
pate heat when tested under controlled condi­
tions on a specified i ndoor laboratory test
wheel.
Sustained high temperature can cause the
materia l of the tire to degenerate and reduce
tire life, and excessive temperature can lead
to sudden ti re fa ilu re ¢ ,&. .
The grade
C corresponds to a level of perform ­
ance which all passenger car tires must meet
u nder the Federa l Moto r Veh icle Safety Stand­
a rd No.
1 09. G rades Band A represent h igher
l eve ls of perfo rmance on the laboratory tes t
wheel than the m inimum required by law .
A WARNING
The traction grade assigned to this ti re is
based on stra ight-ahead b raking t raction
tests, and does not include acceleration,
cornering, hydrop lan ing or peak traction
character istics.
A WARNING
The temperature grade for this t ire is es­
tablished for a t ire that is p roperly inflated
and not overloaded. Excessive speed, un­
derinflation, or excessive loading, either
-
Tire s an d wheel s 237
separately or in combinat ion, can ca use
heat bui ldup and possible tire failure.
Winter tires
Winter tires can improve vehicle handling on
snow and ice. At temperatures below 45 °F (7 °C) we recommend changing to winter
tires.
In some heavy snow areas, local governments
may require true winter o r "snow" tires, those
with very deeply cut tread. These tires should
o nly be used in pairs and be installed o n all
four wheels . Make sure you purchase snow
t ires that are the same size and construction
type as the other tires on you r vehicle.
Your vehicle is equipped with all wheel drive,
th is w ill improve traction during winter driv­
i ng, even with the standa rd tires . However, we
strong ly recommend that you always equip all
fo ur wheels on you r vehicle wit h corre ct ly fit­
ted winter tires or all-season t ires, when win­
te r road cond itions are expected . This also im ­
proves the veh icle's braking per formance and
reduces stopping dista nces.
Summe r tires provide less grip on i ce and
snow.
Winter tires (snow tires) must always be fitted
o n all fo ur wheels .
Ask your authorized Audi dealer or qualified
workshop for permitted
winter tire size s. Use
o nly rad ial w inter t ires.
Winter tires lose their effectiveness when the
tread is worn down to a depth of
0 .157 inch
(4 mm) .
Only drive w ith w inter t ires under w inter con­
dit ions. Summer t ires handle better when
there is no snow or ice on the roads and the
temperature is above 45 °F (7 °() .
If you have a flat tire, see notes on spare
whee l
¢page 233.
Please a lways remember that winter tires may
have a lowe r speed rating than the tires o rigi -
nally installed on your vehicle at the time it .,.
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