traction control AUDI RS7 SPORTBACK 2016 Owners Manual

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Electronic Stabilization
Control (ESC)
Description
E SC helps to imp rove ro ad hold ing and vehicle
dynamics to help reduce the probab ility of skid­
d ing and loss of veh icle control. It works only
when the engine is runn ing . ESC detects certain
d iffic ult dr iving situat io ns, including when the
ve hicl e is begin ning to spin (yaw) o ut of contro l
and h elps you to ge t the veh icle b ack u nde r con ­
trol by se lectively bra king the wheels, and/or re­
ducing engine powe r and providing steering as­
sistance to help hold the vehicle on the driver's
intended course. The indicator light
GI in the in­
strument cluster blinks when ESC is tak ing action
t o he lp you contro l the vehicle.
ESC has lim itations. It is important to remembe r
that ESC cannot overcome the laws o f physics. It
will not a lways be able to help out under all con­
d itions you may come up aga inst . For example,
ESC may not always be ab le to help you master
situations where there is a sudde n change in the
coeff ic ie nt of fr iction of the road surface. W hen
there is a se ction of dry roa d that is sudde nly cov­
e red with w ater, slush o r sn ow , ESC c annot pe r­
form the same way i t wou ld on the dry s urface. If
the vehicle hydrop lanes (rides on a cushion of wa­
ter instead of t he road su rface), ESC w ill not be
ab le to he lp you stee r the veh icle because contact
with the pavement has been inte rru pted and the
ve hicle cannot be b raked or steered . Dur ing fast
cor nering, part icu la rly on w inding roads, ESC
can not always deal as effect ive ly w it h difficult
d riving situat ions than a t lowe r speeds .
Always ad just yo ur speed and driving sty le to
road, traffic and weath er cond itions . ESC canno t
over ride the vehicle's phys ical lim its, increase the
ava ilab le traction, o r keep a ve hicle on t he road if
roa d depa rture is a re su lt of driver in attention .
I nstead, ESC imp roves the possibili ty of keep ing
180
t h e veh icle unde r contro l and on t he road d uring
extreme mane uvers by using the driver's steer ing
i nputs to help keep the veh icle go ing in the in­
tended direction. If you are traveling at a speed
that causes you to run off the road before ESC
can p rovide any assistance, you may not exper i­
ence the be nefits of ESC.
ESC is switc hed on all the time. In certa in s itua­
tions when you need less tract ion, you can sw itch
off ASR by press ing the button
[g] c:> page 181,
fig . 175 . Be sure to switc h ASR on aga in whe n
you no longer nee d less tract ion.
The following systems are integrated in the ESC:
Anti-lock braking system (ABS)
A BS prevents the w heels from locking w hen bra k­
i ng . The veh icle can still be steered even dur ing
hard braking. App ly steady p ressure to the brake
pedal. Do not pump the pedal. A pulsing in the
brake peda l ind icates that the system is act ing to
stab ilize the veh icle.
Brake a ssist system
The brake assist system can decrease b raking dis­
tance. It increases b raking powe r whe n the dr iver
presses the b rake peda l quickly in emergency sit­
uat ions. You must press a nd hold the brake peda l
u nt il the dange rous situation is over . In vehicles
with adaptive cruise co ntrol*, the brake ass ist
syste m is more se nsitive if the distance detected
t o t he veh icle ah ead is too sm all. On vehicle s wi th
a ctiv ate d a nd fun ctioni ng nigh t vis ion assi st*, the
brake assis t sys tem can respond more sensit ively
i f there is a warning .
Anti-slip regulation (ASR )
ASR reduces e ngine powe r whe n the d rive whee ls
begin s pin nin g and ad apts the force to the ro ad
con ditions. This m akes i t easier to s tar t, a cce ler ­
ate and drive up incl ines .
Electronic differential lock (EDL)
E DL applies t he b rakes to a whee l th at s tarts
sp inning a nd transfers the dr ive power to the
othe r drivi ng whee ls . This fu nction is n ot a vail a-
b le at hig he r sp eeds . .,..

Winter tires
Winte r ti res s ignificantly improve the veh icle's
handling when driving in winter condit ions. Be­
cause of the ir construction (width, compound,
tread pattern), summer tires provide less trac­
tion o n ice and snow.
,.. Use w inter t ires on all fo ur wheels.
,.. Only use winter t ires that are approved for your
vehicle.
,.. Please note that the maximum permitted
speed may be lower with winter tires
9 &, . An
authorized Audi dealer or authorized Audi Serv­
ice Facility can inform you about the maximum
permitted speed for your tires.
,.. Check the tire press ure after installing wheels
9page 228.
The effectiveness of winter tires is reduced great­
ly when the tread is worn down to a depth of
0 .1 57 inch (4 mm). The character istics of winter
tires a lso dec rease great ly as the tire ages, re­
ga rdless of the remaining tread.
_& WARNING
- Never drive faster than the maxim um per­
mitted speed for your tires. This cou ld cause
the tires to heat up too much . Th is increases
the risk of an accident because it can cause
the tire to burst.
- Always adapt your dr iv ing to the road and
traff ic conditions. Drive carefully and reduce
your speed on icy or slippery roads. Even
winter tires can lose traction on black ice.
@ For the sake of the environment
Reinstall summer ti res at the appropriate
time, because they provide better handling
when roads are free of snow and ice. Summer tires cause less road noise, t ire wear and fuel
consumption.
You ca n also use all season tires instead of
w inter t ires. Please note that in some coun­
tries where w inter t ires are required, only
w inter t ires with the
& symbol may be per­
m itted.
-
Wh eel s
Snow chains
Snow chains improve traction in the snow .
,.. On ly install snow chains on the front wheels.
,.. Check and correct the seating of the snow
chains if necessary after driving a few feet. Fol­
low the instruct ions from the manufacturer.
,.. Note the maximum permitted speed when dr iv­
ing wit h snow chains. Do not exceed 30 mph
(SO km/h) .
Snow cha ins not o nly improve the
driving in win­
te r road condit ions, but also the
braking.
Use of snow chains is only permitted with certa in
rim/tire comb inat ions due to technical reasons.
Check with an authorized Audi dealer or author­
ized Audi Service Facili ty to see if you may use
snow c ha ins.
You must remove the chains when driving on roads that are
free of snow . When roads are free
of snow, snow chai ns can impa ir handling and
damage the tires, and the chains will qu ic kl y be
dest royed.
_& WARNING ~
Using incorrect snow chains or ins tall ing snow
chains incorrect ly can resu lt in loss of veh icle
control, which increases the risk of a n acci­
dent.
(D Note
- Snow chains can damage the rims/wheel
covers* if the chains come into direct con ­
tact with them . Remove the wheel covers*
first. Use coated snow chains.
- Using snow c hains that add more than 0.4
inch ( 10.5 mm) of height can severely dam­
age the whee l housings and other vehicle
components.
- Do not insta ll and use snow chains if there is
a malfunction in the adapt ive a ir suspen­
sion*, because the vehicle he ight will be
very low. If you drive with snow chains any­
way, the wheel housings and other vehicle
components can be seve rely damaged.
233

Tread wear
The
tread wear grade is a comparative rating
based on the wear rate of the tire when tested
under controlled conditions on a specified gov­
ernment test course.
F or example, a t ire graded 150 would wear one
and one half (11/2) times as well on the govern­
ment course as a tire graded 100 .
The relative performance of tires depends upon
the actual conditions of their use, however, and
may depart significantly from the norm due to
variations in driving habits, service practices and
differences in road characteristics and climate .
Traction
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 un ­
der controlled conditions on specified govern­ ment test surfaces of asphalt and concrete. A tire
marked C may have poor traction performance
¢ .&, .
Temperatur e
The
temperature grades are A (the highest), B,
and C, representing the tire's resistance to the
generation of heat and its ability to dissipate heat when tested under controlled conditions on
a specified indoor laboratory test wheel.
Sustained high temperature can cause the mate­ rial of the tire to degenerate and reduce tire life,
and excessive temperature can lead to sudden
tire failure
c:> .&, .
The grade C corresponds to a level of perform­
ance which all passenger car tires must meet un­
der the Federal Motor Vehicle Safety Standard No. 109. Grades Band A represent higher levels
of performance on the laboratory test wheel than
the minimum required by law.
A WARNING
-
The traction grade ass igned to this tire is
based on straight-ahead braking traction
tests, and does not include acceleration, cor­
nering, hydroplaning or peak traction charac­
teristics.
Wheels
A WARNING
The temperature grade for this tire is estab­ lished for a tire that is properly inflated and
not overloaded. Excessive speed, underinfla­
tion, or excessive loading, either separately or
i n comb inat ion, can cause heat buildu p and
possible tire failure.
A WARNING
-
-
Temperature grades apply to tires that are
properly inflated and not over or underinflat­
ed.
Tire pressure monitoring system
ill General notes
Each tire, including the spare (if provided),
shou ld be checked monthly when cold and inflat­
ed to the inflation pressure recommended by the
vehicle manufacturer on the vehicle placard or
tire inflation pressure label. (If your vehicle has
tires of a different size than the size indicated on
the vehicle placard or tire inflation pressure la­
bel, you should determine the proper tire infla ­
t ion pressure for those tires).
As an added safety feature, your vehicle has been equipped with a tire pressure monitor ing system
(TPMS) that illuminates a low tire pressure tell­
tale when one or more of your tires is significant­ ly under -inf lated. Accordingly, when the low t ire
pressure telltale illuminates, you should stop and
check your tires as soon as possib le, and inflate
them to the proper pressure . Driving on a signifi­
cant ly under-inflated tire causes the tire to over­
heat and can lead to tire failure. Under-inflation
also reduces fue l efficiency and tire tread life,
and may affect the vehicle's handling and stop­
ping ability .
Please note that the TPMS is not a substitute for
proper tire maintenance, and it is the driver's re­
sponsibility to maintain correct tire pressure,
even if under-inflation has not reached the level
to trigger illumination of the TPMS low tire pres-
sure telltale . .,.
235