2018 AUDI Q7 traction control

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::r ' The all-wheel drive system distributes the driving
power variably to the front and rear ax le . It works
together with se lective whee l torque contro l,
which activates when driving through curves
c:::;, page 142. With the sport differentia l", power
distribution to the rear wheels is variable and can be adjusted using the drive select
¢ page 128.
The all wheel drive concept is designed for high
engine power. Your vehicle is exceptionally pow­
erful and has excellent driving characteristics
both under normal driving condit ions and on
snow and ice . Always read and fo llow safety pre­
cautions
c:::;, /1),.. .
Winter tires
By us ing all wheel drive, your vehicle has good
forward motion with standard tires in w inter con ­
ditions . However, using winter or all season tires
on
all four wheels in the winter is recommended,
because this will improve the
braking effect.
Snow chains
If there are snow chain laws, snow chains must
also be used on vehicles with all wheel drive
c:::;, page 346, Snow chains .
Replacing tires
For vehicles with all wheel dr ive, only wheels w ith
the same rolling circumference should be used .
Avoid using tires w ith different tread depths
c:::;, page 33 7, New tires or wheels.
A WARNING
- Also, in vehicles with al l wheel drive, adapt
yo ur driv in g style to the current road and
traffic conditions. Do not let the increased
safety provided tempt you into taking risks,
because this increases the risk of an acci­
dent.
- T he braking ability of your vehicle is limited
to the traction of the wheels. In this way, it
is not different from a two whee l drive vehi ­
cle. Do not be tempted to accelerate to a
high speed when the road is slippery, be­
cause this increases the risk of a n accident.
- Note that on wet streets, the front wheels
can "hydroplane" if driving at speeds that
are too high. Unlike front wheel drive
Intelligent Technology
vehicles, the engine does not rev higher sud­
denly when the vehicle begins hydroplaning.
For this reason, adapt your speed to the
road conditions to reduce the risk of an acci­
dent.
Energy management
Your vehicle is equipped with an intelligent ener­
gy management system for distributing electrici­
ty. This significantly improves the start ing ability
and increases the vehicle battery life.
(D Tips
-If you dr ive short distances frequently, the
vehicle battery may not charge enough
w hile driving . As a result, convenience func­
tions for e lectr ical equipment may be tem­
porarily unavailable.
- The vehicle battery w ill gradually drain if
the vehicle is not driven for long periods of
time, or if electr ical eq uipm ent is used
when the engine is not running. To ensure
that the vehicle can still be started, the
electrical equipment wi ll be reduced or
switched off.
Notice about data
recorded by the Event
Data Recorder and
vehicle control modules
Event Data Recorder
This vehicle is equipped with an Event Data Re­
corder (EDR). The main purpose of an EDR is to
record, in certain crash or near crash-like situa­
t ions, such as an airbag deployment or hitt ing a
road obstacle, data that w ill ass ist in understand­
ing how a vehicle's systems performed. The EDR
is des igned to record data related to vehicle dy­
nam ics and safety systems for a short per iod of
time, typicall y 30 seconds or less. The EDR in this
vehicle is designed to record such data as:
- How various systems in your veh icle were oper­
ating;
- Whether or not the driver and passenger safety
be lts were buckled/fastened; .,.
147

Wheels
tires cause less road noise, tire wear and fuel
consumption.
(D Tips
You can also use all season tires instead of
winter tires. Please note that in some coun­
tries where winter tires are required, only
winter tires with the
& symbol may be per­
mitted.
Snow chains
Snow chains not only improve the driving in win­
ter road conditions, but also the braking .
~ Only install snow chains on the front wheels.
~ Check and correct the seating of the snow
chains after driving a few feet, if necessary . Fol­
low the instructions from the manufacturer.
~ Note the maximum speed of 30 mph (SO km/
h). Note the local regulations.
Use of snow chains is only permitted with certain
rim/tire combinations due to technical reasons.
Check with an authorized Audi dealer or author­
ized Audi Service Facility to see if you may use
snow chains.
Use
fine-mesh snow chains . They must not add
more than 0 .53 in (13.5 mm) in height, including
the chain lock.
You must remove the snow chains on roads with ­
out snow. Otherwise, you could impair driving
ability and damage the tires.
.&_ WARNING
Using incorrect snow chains or installing snow
chains incorrectly can result in loss of vehicle
control, which increases the risk of an acci­
dent.
(LlJ) 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.
- Do not install and use snow chains if there is
a malfunction in the air suspension*, be­
cause the vehicle height will be
very low. If
346
you drive with snow chains anyway, the
wheel housings and other vehicle compo­ nents can be severely damaged.
(D Tips
When using snow chains, it may be useful to
switch the offroad mode on
r=> page 143.
Low-profile tires
Applies to: vehicles with low-profile tires
Compared to other tire/rim combinations, low­
profile tires offer a wider tread surface and a
larger rim diameter with shorter tire sidewalls.
This results in an agile driving style. However, it
may reduce the level of comfort and increase
road noise when driving on roads in poor condi­
tion.
Low -profile tires can become damaged more
quickly than standard tires when driving
over
large bumps, potholes, manhole covers, and
curbs . Therefore, it is particularly important to
maintain the correct tire pressure
r=.> page 340.
To reduce the risk of damage to the tires and
rims, drive
very carefully on poor roads.
Check your wheels regularly every 2,000 mi
(3,000 km) for damage . For example, check for
bulges/cracks on the tires or deformations/
cracks on the rims.
After a heavy impact or damage, have the tires
and rims inspected or replaced immediately by
an authorized Audi dealer or authorized Audi
Service Facility.
Low-profile tires can wear out faster than stand­
ard tires .
Uniform tire quality grading
- Tread wear
- Traction AA ABC
- Temperature ABC
Quality grades can be found where applicable on
the tire side wall between tread shoulder and maximum section width
r=.> page 331, fig. 269.

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::r ' For example: Tread wear 200, Traction AA, Tem­
perature
A.
All passenger car tires must conform to Federal
Safety Requirements in addition to these grades.
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.
For example, a tire graded 150 would wear one
and one ha lf (1 1/2) 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 significant ly 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, B and
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
¢ &, .
Temperature
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¢ &,.
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.
Wheels
A WARNING
--
The traction grade assigned to this tire is
based on straight-ahead braking traction
tests, and does not include acceleration, cor­
nering, hydroplaning or peak traction charac­
teristics.
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
in combination, can cause heat buildup 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),
should 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 ind icated on
the vehicle placard or tire inflation pressure la­
bel, you should determine the proper tire infla­
tion pressure for those tires).
As an added safety feature, your vehicle has been
equipped with a tire pressure monitoring system
(TPMS) that illuminates a low tire pressure tell­
tale when one or more of your tires is significant­ ly under -inflated. Accordingly, when the low tire
pressure telltale illuminates, you should stop and
check your tires as soon as possible, and inflate
them to the proper pressure. Driving on a signifi­ cantly 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. .,.
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