2011 AUDI Q7 brake

Intelligent technology
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& WA RNING (conti nu ed )
• Plea se be aware th at in ESP offroad mode , particularly on a
s mooth and slippery road, the wheels may have an incr eased
tendency to spin and the vehicle may break awa y -danger of skid ­
ding!
• Stabilit y is limited in the ESP offroad mode. •
Electronic differential lock (EDL)
The electronic differential lock monitors the rotational
speed of the drive wheels.
General notes
The electronic differe ntia l lock (EDL) helps the ca r to sta rt moving,
acce lerate and climb a gradient on surfaces provi ding poor or almost
no grip. W ithout ED L, th is would be d iff ic ul t, if not impossible .
How the system works
The EDL operates automatically . It mo nitors the rotational speed of
w heels wi th the help of the ABS sensors ==>
page 260. If a not iceab le
slip is detected at the wheels (e .g . o n slippery g round on one side),
the spin ning whee ls are braked and power is transferred to the other
wheels. This is done up to a speed of about 60 mph ( 100 km/h) .
Noises from the brake system signa l that wheel spin is being
cont rolled.
Driv ing off
W hen d rivi ng off, always be sure to keep road conditions in mind as
you acce lerate. If one drive wheel spins because it is on a surface with
less grip, apply
plenty of th rottle until t he car starts to move .
Overheating of brakes
To prevent the disc b rake of the bra ked wheel from overhea ting if
subjected to excessive loads on this whee l, t he EDL cuts out tempo ­
ra rily. The vehicle rema ins operat iona l and behaves in the same way
as a veh icle without EDL. As soon as the brake has coo
led down, EDL sw itches on again auto­
m atically.
& WARNING
• When accelerating on slippery surfaces, such as on ice or snow,
always be careful when depressing the accele rator pedal. Even
with the EDL working , the drive wheels c an spin and reduce your
ability to control your car . Risk of crash!
• The increased safety afforded by EDL does not mean that you
can take safety risks . Always adapt your d riv ing style to the road
c ondition s and traffic situation.
[ i ] Tips
If a fa ult occurs in the A BS, the ED L is also no t fu nct io ni ng. This is
ind icated by the ABS warn ing light==>
page 19. •
Anti-Slip Regulation System (ASR)
The Anti- S lip Re gula tion System preven ts the drive n
w heels from spin ning wh en the car is acc ele rating .
General notes
The Anti-S lip Reg ulation Sys tem (ASR) is in tegr ated in the ele ctroni c
stabilization program (ESP) . When the ve hicle starts up and acceler­
a tes, the whee ls are p reven ted from sp inning by adjust ing t he engine
power to match the amoun t of grip ava ilable from the road surface.
How the system works
ASR performs automatica lly, i.e. witho ut the driver 's intervent ion.
With the aid o f th e ABS sensors ==>
page 260, ASR moni to rs the speed
of the driven wheels. If the whee ls start to spin, engine torque is
reduced automatically unt il the tires find enough gri p to lock onto
the road s urface. The system is active ac ross the en tire speed range .
'1>

_________________________________________ I_ n_ t_ e_ ll_,igent technology ,__E~-
The ASR works in conjunction with the ABS. If a malfunction should
occur in the ABS, the ASR w ill also be out of action.
& WARNING
The increased safety afforded by ASR does not mean that you can
take safety risks. Always adapt your driving style to the road
conditions and traffic situation.
[ i] Tips
To ensure that the ASR works properly, all four whee ls must be fitted
with ident ical tires. Any differences in rolling radius of the tires can
cause the system to reduce engine power when th is is not desired.
See also=>
page 330, "New tires and replacing tires and whee ls" .•
Braking
General information
What affects braking efficiency?
Operating conditions and driving habits
The brakes on today's automobiles are still subject to wear,
depending large ly on operating conditions and driving habits=>& .
On vehicles that are either driven mostly in stop -and -go city traffic or
are driven hard, the brake pads should be checked by your authorized
Audi dealer more often than specified in the
Warranty & Mainte­
nance booklet.
Failure to have your brake pads inspected can result
in reduced brake pe rformance .
On steep slopes, you should use the brak ing effect of the engine . This
way, you prevent unnecessary wear on the brake system. If you must
use your brakes, do not hold the brakes down continuously. Pump the
brakes at intervals.
Noises may occur when braking depending on the speed , braking
force and outside conditions such as temperature and humidity.
Safety first
Moisture or road salt
If you are driving faster than 31 mph (SO km/h) and the windshield
wipers are on, the brake pads wi ll briefly touch the brake discs in
regular interva ls so as to improve reaction time when braking on wet
surfaces . You, the driver, will not not ice anything.
Under certain cond itions, for example, when driving through wa ter or
very heavy rain, or even after washing yo ur vehicle , the braking effect
can be reduced due to moisture (or in free zing conditions ice) on the
brake pads. A few careful brake applications should dry off the brake
pads or remove any ice coatings .
The effect iveness of the brakes can be reduced when the vehicle is
dr iven on a sa lt-covered road and the brakes are not used. Here too,
you should clean off accumu lated salt coating from brake discs and
pads with a few careful applications of the brake=> & -
Corrosion
There may be a tendency for dirt to build up o n the brake pads and
corrosion to form on the dis cs if the car is no t driven regularly or only
for short trips with little use of the brakes.
If the brakes are not used frequently, or if corrosion has formed on
the discs, it is advisable to clean off the pads and discs by braking
firmly a few times from a moderately high speed=> &.
Faults in the brake system
If you should notice a sudden increase in brake pedal travel, then one
o f the two brake circuits may have failed==>& .
Low brake fluid level
Malfunctions can occur in the brake system if the brake fluid level is
too low. The brake fluid level is monitored e lectron ically .
Brake lining wear status
Brake lining wear may be checked by visual inspection of the condi­
tion of the brake pads through the openings in the wheel. If neces­
sary, the wheel may be removed for this inspection =>
page 343,
"Changing a wheel". ._.
Vehicle care Technical data

Intelligent technology
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in. WARNING
• You should perform braking maneuvers for the purpose of
cleaning the brake system only if road condition s permit. Other
road u sers must not b e put at r isk - you may cau se an ac cident!
• Before d esc ending a steep gr ade , redu ce speed and shift tran s­
mission into a lower gear or lower driving range. Do not ride the
brakes or hold the pedal down too long or too often . This could
cause the brake s to get hot and diminish braking efficiency.
• Do not "ride the brakes " by re sting your foot on the pedal when
you do not intend to brake. Thi s may caus e the brakes to overheat ,
premature wear and increa sed stopping di stance.
• Under certain climatic and operating conditions such as
pas sing through water, driving in heavy rain or after washing the
vehicle, the effectiveness of the brake s can be reduced . In winter,
ice can accumulate on the brake pads , linings , disc s and drums .
Carefully apply brakes for a test. Brake s will dry and ice coatings
will be cleaned off after a few careful brake applications.
• Driving for an extended period of time on salt -cov ered roads
without using your brakes can al so affect braking efficiency. Clean
off accumulated salt coating from brake d iscs and pads with a few
careful brake applications.
• If you damage the front spoiler , or if you install a different
s poiler , be sure the air flow to the front brakes is not obstructed.
Otherwise the brake system could overheat reducing the effective­
ness of the entire brake system.
• Failure of one brake circuit will impair the braking capability
resulting in an increased stopping distance. Avoid driving the
vehicle and have it towed to the nearest authorized Audi dealer or
qualified wo rkshop. •
Brake booster
The brake booster adds e xtra brakin g pow er .
The brake booster works with vacuum pressure which is created only
w hen the en gine is ru nning =>& .
in. WARNING
• Never let the vehicle roll to a stop with the engine shut off .
• If the brake booster i s not working , for example when towing
your vehicle , or because the brake booster has somehow been
damaged , the brake pedal must be p ressed considerably harder to
make up for the lack of booster assistan ce.
Functioning of Anti-Lock Brake System
(ABS)
AB S prevents the wheels from locki ng up under braking.
T he ABS co ntribu tes effectively to vehicle co ntrol s ince it prevents t he
w hee ls from
locking when the b rakes are a pplied. This means t hat t he
veh icle rema ins steerable and is less likely to s kid .
W ith ABS you do not need to
pump the brake. Just hold the brake
pedal down .
However, do not expect the ABS to shorten braking distance u nder
oil
circums tances. When driving on grave l or on newly fa llen snow on top
of icy su rfaces, braking dis tance may be even longer, therefore, under
these c irc umstances, it is especially important that you dr ive slowly
and w it h great care .
How the ABS system works
An automatic check is made when a speed of about 12 mph (20 km/h)
is reached . Whe n this happens, a p umping noise can be hea rd. ._

_________________________________________ I_ n_ t_ e_ ll_,igent technology ,__E~-
If an individual wheel begins to rotate too slowly in relation to vehicle
speed and tends to lock, the ABS automatically reduces brake pres­
sure to prevent that wheel from locking .
Thi s automatic adjustment process wi ll cause a
slight vibration of
the brake pedal and some noises to alert you that vehicle speed must
be adapted to existing road and traffic conditions.
_& WARNING
Although the ABS is very effective, always remember that braking
capability is limited by tire traction. Always adjust your driving
speed according to the road and traffic conditions. Do not let the
extra safety afforded by the ABS tempt you into taking extra risks.
The ABS cannot overcome the laws of physics .
(I) Tips
• If ABS is not funct ioning properly, a warning light will come on .
See ~
page 19.
• If a fault occurs in the ABS, the EDL is also not functioning. This is
ind icat ed by the ABS warning light. •
Brake assistant
The brake assistant is designed to achieve the optimum
braking effect.
The brake assistant helps to increase the effective braking power and
thus to achieve a shorter stopping distance.
If the driver presses the
brake peda l very qu ickly , the brake assistant automatically boosts the
braking force to the maximum level, up to the point where the anti­
lock brake function (ABS) intervenes to stop the whee ls from locking.
You should then keep the brake pedal pressed until the vehicle has
braked to the required speed. The brake assistant switches itself off
as soon as you release the brake pedal.
Controls and equip­ ment Safety first Vehicle operation
Automatic full braking
assist
This function allows full braking in spite of high brake pedal forces
(e .g . when the brakes are severely stressed because the veh icle is fully
loaded). The driver notices this function through a reduction of pedal
force and increased pedal travel. When the brake pedal is released,
full braking assist switches off again automatically.
If there is an ABS failure, the brak e assistant and automatic full
braking assist are not available.
Th e brake assistant will not be operative if there is a ma lfunction in
the ABS .
_& WARNING
Please remember that the accident risk always increases if you
drive too fast, especially in corners or on a slippery road, or if you
follow the vehicle ahead of you too closely. Increased risk of an
accident cannot be compensated for even by the brake assistant ,
so always maintain a safe speed.•
Servotronic® -advanced power
steering system
The power steering systems uses the power of the
running engine to allow precise steering with little effort.
The advanced Servotronic ® power steering system senses the road
speed and electronically adjusts power assistance to provide
comfortable and safe steering response exactly matched to the
vehicle speed .
Power steering will not work if the engine is off. As a result , the
steering wheel will be hard to turn .
Th e power steering fluid level is checked during the scheduled main­
tenance services.
Vehicle care Do-it-yourself service Technical data

Driving and environment
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Driving and environment
The first 1,000 miles (1,500 km)
and afterwards
New engine
The engine needs to be run-in during the first 1,0 00 miles
(1,50 0 km) .
For the first 600 miles (1,000 kilometers):
- Do not use fu ll thrott le .
- Do not drive at engine speeds that are more than 2/3 of
the maximum permitted RPM .
From 600 to 1,000 miles (1 ,000 to 1 ,500
kilometers):
- Speeds can
gradually be increased to the maxim um
perm iss ible road or engine s peed .
During and after break-in period
- Do no t rev the eng ine up to high speeds when it is co ld.
T h is app lies w hether th e t ransmission is in N ( Neutral) o r
1 n gear .
After the break-in period - Do not exceed maximum engine speed under any circum ­
stances.
- U pshift i nto the nex t higher gear
before reach ing t he red
area at t he end of the tachometer scale==>
page 10.
Dur ing the first few hours of driving, the engine's interna l friction is
hig her than later w hen all the moving pa rts have been broken in. How
Controls and equip­ ment Safety first Vehicle operation we
ll th is b reak-in p rocess is done depends to a cons iderab le extent on
the way the veh icle is d riven dur ing the f irst 1,000 miles (1,500 kilo­
meters).
0 Note
E x tremely high e ngine speeds are automatic ally reduced. However,
these rpm limits are programmed for an engine well run- in, not a new
engi ne.
~ For the sake of the environment
Do no t dr ive with u nnecess arily hig h engine speeds -upshift ing early
saves f uel, reduces noise and protects the environme nt.•
New tires
If y our veh icle is run nin g on n ew tir es, dr ive parti cula rl y
carefu l for the fi rst 35 0 mil es (500 kil ometer s) af ter fit ting.
& WARNING
New tires tend to be slippery and must also be "broken -in ". Be
sure to remember this dur ing the first 350 miles (500 kilome ­
ter s) . Brake gently. Avoid following closely behind other vehicles
or other situations that might require sudden, hard braking.
u
New brake pads
Remember tha t new brak e pa ds d o no t hav e a fu ll braki ng
eff ect d uri ng the first 250 mi les (400 k ilomet ers) after they
are i nsta lled.
Vehicle care Do-it-yourself service Technical data

Driving and environment
New brake pads have to be "burnished in" before they have optimal
grab ~& .
Dur ing the break-in period, you should avoid putting severe loads on
the bra kes. Severe loads incl ude, for example, sudden hard braking,
in part icu lar at very high speeds or, for examp le, on mountain passes .
& WARNING
New brake pads don't have the be st stopping power and must be
" b roken-in " du ring the initial 100 to 150 miles (150 to 200 kilo­
meters ) of normal city driving . You can compensate for this by
pressing the brake pedal more firml y. This also applies later when
new pad s are installed.
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Ap plies to veh icles : w it h gasoline eng ine
Catalyt·c converter
It is very important tha t your emission con trol system
(catalytic c onverte r) is f unctioning properly to ensure
that your vehicle is running in an environmentally sound
manner.
- Always use lead-free gasoline~ page 291, "Gasoline" .
- Never ru n the tan k down a ll the way to empty .
- Nev er put to o mu ch mot or oil in y our engin e~
pag e 306,
"Add ing engin e oil~" -
- Neve r try to push -or tow-start yo ur vehicle .
The catalytic converter is an efficient "clean-up" dev ice built into the
exhaust system of the ve hicle. The catalytic converter burns many of
the pollutants in the exhaust gas before they are released into the
atmosphere. The exclusive
use of unleaded fuel is critically important for the life of
t he c atal ytic converte r and proper f unct ion in g of t he engi ne.
& WARNING
• Do not park or operate the vehicle in areas where the hot
e x haust system may come in contact with dry grass , brush , fuel
s pill or other material whi ch can cau se a fire.
• Do not apply additional undercoating or rustp roofing on or
near the exhau st manifold, exhaust pipe s, catalytic converter or
heat shields. During driving , the substance used for undercoating
c ould overheat and cau se a fire .
0 Note
• Be aware th at just one tank fi lling wit h le aded fu el w ill alre ady
ser iously degrade the performance of the catalytic co nverter.
• Do not excee d the correct engine oil leve l~
page 306.
• Do not drive unti l the f uel tank becomes complete ly empty . The
eng ine could misfire. Unbu rned fuel could also ge t into the exha ust
system and th is could cause the catalytic converter to overheat.
• Do not tu rn off the igni tion whi le the veh icle is moving .
• Do not contin ue to operate your vehicle under these conditions, as
o therwise fuel can reach the cata lytic converter . This could result in
overheating of the converte r, requiring its rep lacement.
• To assu re eff icient operat ion of the Emission Co ntrol System:
- Have yo ur vehicle main taine d pr operly and in a ccordan ce wi th
the service recommendations in your Warranty
& Maintenance
booklet .
- Lack of p roper maintenance as well as improper use of the
veh icle w ill imp air the f unction of the emiss io n con trol syste m and
could lead to damage. ..

• Driving and environment
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ffi For the sake of the environment
Even when the Emission Control System is operating properly, the
exhaust gas can have a sulfur-like exhaust gas smell under some
operat ing states. This depends on the sulfur content of the fue l being
used. Using a different brand of fuel may help, or filling the tank with
lead-free supe r grade gasoline. •
Applies to vehicles: with d iesel engine
Diesel particulate filter
The diesel particulate filter filters nearly all of the soot particles out
of the exhaust. The filter cleans itself automatica lly under norma l
driving conditions. If the filter cannot clean itself (for example,
because you are only driving short distances), the fi lter becomes
clogged with soot and the symbol for the diesel particulate filter
illuminates ~
page 40.
& WARNING
• Do not park your vehicle over flammable materials such as
grass or leaves because the high temperature of the diesel partic­
ulate filter could start a fire.
• Do not apply an underbody protectant in the exhaust system
area or a fire could start. •
Avoid damaging the vehicle
When you are driving on poor roads, or over curbs, steep ramps, etc.,
make certain that low-lying parts such as spoilers and exhaust system
parts do not bottom out and get damaged.
Thi s is espec ially true for vehicles with low-slung chassis (sports
chassis)" and fully loaded vehicles. •
Controls and equip­
ment Safety first Vehicle operation
Operate your vehicle economically
and minimize pollution
General
Your personal
style of driving will determine the economy
of your vehicle, as well as exhaust and noise levels.
Fuel economy, environmental impact, and wear on your engine,
brakes and tires largely depend on three factors:
• your personal dr iv ing style
• operating conditions
• technical limitations
If you anticipate what you need to do next and drive economically,
you can easily cut your fuel consumption by 10-15 percent. This
section will give you some tips on how you can he lp the environment
and your pocketbook.
(I) Tips
The consumption est imates as published by ENVIRONMENTAL
PROTECTION AGENCY (EPA) and Transport Canada may not corre­
spond to your actual consumption on the road, which will vary
depending upon vehicle load and speed, road and weather conditions,
trip length, etc.
Drive smoothly and keep a lookout ahead
Vehicles use the most fuel when they are accelerating.
-Avoid unnecessary accelerating and braking.
Vehicles use the most fuel when they are accelerating . If you antici­
pate what is going to happen next, you will need to brake less and,
thus, accelerate less. Let the vehicle coast whenever possible - for
example when you see that the next traffic light is red. •
Vehicle care Do-it-yourself service Technical data

Driving off road
- Use the hill descent control~ page 257 when dr iving
down steep sections on hills .
Unpaved roads and offroad
Drive slowly on unfamiliar roads and unknown offroad sections, and
loo k ou t for unexpec ted obsta cles (e.g. potho les, rocks, t ree st umps,
etc.).
T o prevent the vehicle from bottoming and avoid damage to the
unde rbody, you should d rive st raight ac ross severe b umps in the
ground with on ly one s ide of the vehicle so that on ly two of your
w heels cross the bumps.
Drive brisk ly throug h sandy or marshy offroad sections and do not
stop, if at all possible.
Driv ing th rough water
N ote the following to avoid vehicle dam age when driving throug h
water, for example on flooded roads:
• T he wate r must not be any higher than the bottom of the ve hicle
body .
• Do not drive faste r th an wal king speed .
Driving on a slope
If yo u ever find you rsel f not able to climb a slope, do not t ry to turn
around, drive back down in
re verse . Otherw ise, you run t he risk of
t ipping over .
If the vehicle threatens to t ip over when driving across a slope, you
must immediately steer downhill in the direction of the slope.
Do not park yo ur vehicle o n steep s lopes o r gr ad es.
To red uce the risk of tipp ing over, drive on s lopes in the di rect io n of
t he downward slo pe (fa ll line) -
not crosswi se .
Driv ing on snow-covered ground
T he s tandard tires fi tted to yo ur vehi cle are not snow t ires. So yo u
should mount wheels with snow t ires in good t ime where winter road
conditions p revail. Befo re dr iv ing on unp lowed stretches o f deep snow, install tire chains
. For tech nica l reasons, t ire chains may only
be ins talle d on the re a r wheels -never on the front whee ls.
& WARNING
After driving through water , mud, slush, etc. , the brakes may be
slow to take effect because of wet brake rotors and pads.
Dry the
brake s first by braking carefully to re store the full braking effe ct.
0 Note
Vehicle components such as the engine, trans mission, s uspension or
electrical system can be severely damaged by dr iv ing through water.
(I) Tips
• Check the dept h of the water before dr iv in g through it.
• Do not stop the vehicle, dr ive in reverse or sw itch the e ngine off
when driving through water.
• K eep in m ind th at on coming vehicles m ay cre ate w aves t hat ra ise
the water level and make it too deep for your vehicle to drive through
safe ly.
• Avoid dr iving through sa lt water because it ca n cause corrosion .•