inflation pressure AUDI A4 2008 B8 / 4.G Owners Manual

Your vehicle and the environment 230Anticipate well in advance
A car uses most fuel when accelerating. If you anticipate hazards
and speed changes well in advance, you will need to brake less and
thus accelerate less. Wherever possible, let the car slow down grad-
ually with a gear engaged, for instance when you can see that the
next traffic lights are red. This takes advantage of the engine
braking effect, reducing wear on the brakes and tyres. Emissions
and fuel consumption will drop to zero due to the overrun fuel cut-
off.
Change gear early to save fuel
An effective way of saving fuel is to change up quickly through the
gears. Running the engine at high rpm in the lower gears uses an
unnecessary amount of fuel.
Manual gearbox: Shift up to second gear as soon as possible. If
possible, we recommend shifting up to the next gear at approx.
2,000 rpm.
Automatic gearbox: Press the accelerator slowly and avoid using
the “kick-down” feature.
Avoid driving at high speed
Avoid travelling at top speed. Fuel consumption, exhaust emissions
and noise levels all increase very rapidly at higher speeds. Driving at
moderate speeds will help to save fuel.
Do not let the engine idle for longer than necessary
It is worthwhile switching off the engine when waiting in a traffic
jam, at level crossings or at traffic lights with a long red phase. The
fuel saved after only 30 - 40 seconds is greater than the amount of
fuel needed to restart the engine.
The engine takes a very long time to warm up when it is running at
idling speed. Mechanical wear and pollutant emissions are also
especially high during this initial warm-up phase. It is therefore best
to drive off immediately after starting the engine. Avoid running the
engine at high speed.Regular servicing
Regular servicing can establish a basis for good fuel economy
before you start driving. A well-serviced engine gives you the
benefit of improved fuel efficiency as well as maximum reliability
and an enhanced resale value. A badly tuned engine can consume
up to ten percent more fuel than necessary.
Avoid short trips
The engine and emission control system need to reach their proper
working temperature in order to minimise fuel consumption and
emissions.
A cold engine uses disproportionately more fuel. The engine only
reaches its working temperature after about four kilometres, when
fuel consumption will return to a normal level. This is the reason
why we recommend avoiding short trips wherever possible.
Maintain the correct tyre pressures
Always make sure the tyres are inflated to the correct pressures
⇒page 268 to save fuel. If the tyre pressures are just 0.5 bar too low,
this can increase the fuel consumption by as much as 5 %. Due to
the greater rolling resistance, under-inflation also increases tyre
wear and impairs handling.
Do not use winter tyres all through the year; they will increase fuel
consumption by up to 10 %.
Avoid carrying unnecessary loads
Every kilo of extra weight will increase the fuel consumption, so it is
worth checking the luggage compartment occasionally to make
sure that no unnecessary loads are being transported.
A roof carrier is often left in place for the sake of convenience, even
when it is no longer needed. At a speed of 100-120 km/h your car will
use about 12 % more fuel as a result of the extra wind resistance
caused by the roof carrier - even when it is empty.
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Wheels and tyres 268Wheels and tyresWheelsGeneral notes–When driving with new tyres, be especially careful during
the first 500 km.
– If you have to drive over a kerb or similar obstacle, drive
very slowly and as near as possible at a right angle to the
kerb.
– Inspect the tyres regularly for damage (cuts, cracks or
blisters, etc.). Remove any foreign bodies embedded in
the treads.
– Damaged wheels and tyres must be replaced immedi-
ately.
– Keep grease, oil and fuel off the tyres.
– Replace any missing valve caps as soon as possible.
– Mark the wheels before taking them off so that they
rotate in the same direction when put back.
– When removed, the wheels or tyres should be stored in a
cool, dry and preferably dark place.New tyres
New tyres do not give maximum grip straight away and should
therefore be “run in” by driving carefully and at moderate speeds for
about the first 500 km. This will also help to make the tyres last
longer.
The tread depth of new tyres may vary, according to the type and
make of tyre and the tread pattern.Concealed damage
Damage to tyres and rims is often not readily visible. If you notice
unusual vibration or the car pulling to one side, this may indicate
that one of the tyres is damaged. Reduce speed immediately if there
is any reason to suspect that damage may have occurred. Inspect
the tyres for damage. If no external damage is visible, drive slowly
and carefully to the nearest qualified workshop and have the car
inspected.
Tyres with directional tread pattern
An arrow on the tyre sidewall indicates the direction of rotation on
tyres with directional tread. Always note the direction of rotation
indicated when mounting the wheel. This guarantees optimum grip
and helps to avoid aquaplaning, excessive noise and wear.
Tyre service life
Correct inflation pressures and sensible driving habits
will increase the service life of your tyres.– Check the tyre pressures at least once a month.
Fig. 261 Open driver's
door (LHD vehicle) with
sticker listing tyre
inflation pressures
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Wheels and tyres269
Controls
Safety
Driving tips
General maintenance
Self-help
Technical data
– The tyre pressures should only be checked when the
tyres are cold. The slightly raised pressures of warm tyres
must not be reduced.
– The pressures must be altered to suit major changes in
the load being carried.
– Avoid fast cornering and hard acceleration.
– Inspect the tyres for irregular wear from time to time.Tyre pressure and vehicle loading
The tyre pressure must be adjusted according to the load the vehicle
is carrying. We recommend adhering to the tyre pressure specifica-
tions for a maximum load. The tyre inflation pressures are listed on
a sticker on the end face of the driver's door ⇒page 268, fig. 261.
However, if you prefer an extra-smooth ride and the vehicle is not
fully loaded, you can select the tyre pressure for a normal load (no
more than three people travelling in the vehicle). However, should
you wish to drive with a full load you must increase the tyre pressure
to the specified maximum.
Under-inflation or over-inflation will reduce the life of the tyres
considerably and also impair the car's handling. Correct inflation
pressures are very important, especially at high speeds. The pres-
sures should therefore be checked at least once a month and before
starting a journey.
Do not forget the spare wheel* when checking the tyre pressures.
Keep the spare tyre inflated to the highest pressure required for the
road wheels.
Driving habits
Fast cornering, heavy acceleration and hard braking (squealing
tyres) all increase tyre wear.Wheel balancing
The wheels on new vehicles are balanced. However, various factors
encountered in normal driving can cause them to become unbal-
anced, which results in steering vibration.
Unbalanced wheels should be rebalanced, as they otherwise cause
excessive wear on steering, suspension and tyres. A wheel must
also be rebalanced when a new tyre is fitted or if a tyre is repaired.
Incorrect wheel alignment
Incorrect wheel alignment causes excessive tyre wear, impairing the
safety of the vehicle. If you notice excessive tyre wear, contact your
Audi dealer.
WARNING
•
Always adapt the tyre pressure accordingly when the vehicle
load changes.
•
Under-inflated tyres flex more and can overheat at continuous
high speeds. This can cause tread separation and tyre blow-out,
which could result in an accident.For the sake of the environment
Under-inflated tyres will increase the fuel consumption.
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Self-help289
Controls
Safety
Driving tips
General maintenance
Self-help
Technical data
–Loosen the wheel bolts ⇒page 289.
–Raise the car with the jack* ⇒page 290.
–Ta k e o f f the wheel with the flat tyre and then put on the
spare wheel* ⇒page 291.
–Lower the vehicle to the ground.
– Tighten the wheel bolts firmly i n d i a g o n a l s e qu e n c e w i t h
the box spanner ⇒page 289.
–Fit the hub cap back on.After changing a wheel
What you must do after changing a wheel.– Place the wheel with the defective tyre in the spare wheel
well and secure it.
– Put the tools and the jack* back in the luggage compart-
ment.
–The inflation pressure of the newly fitted spare tyre must
be checked as soon as possible.
–Have the tightening torque of the wheel bolts checked as
soon as possible with a torque wrench. The correct tight-
ening torque is 120 Nm.
– Have the flat tyre replaced as quickly as possible.
Note•
If you notice that the wheel bolts are corroded and difficult to
turn when changing a wheel, they must be replaced before having
the tightening torque checked.
•
In the interest of safety, drive at moderate speeds until the tight-
ening torque of the wheel bolts has been checked.
Hub caps
The hub caps must be removed for access to the wheel
bolts.Removing
– Insert the hook (provided in the vehicle's tool kit) in the
hole in the hub cap.
–Pull off the hub cap ⇒fig. 271.Loosening and tightening the wheel bolts
The wheel bolts must be loosened before raising the
vehicle.
Fig. 271 Changing a
wheel: Removing a hub
capFig. 272 Changing a
wheel: Loosening
wheel bolts
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Index335
Controls
Safety
Driving tips
General maintenance
Self-help
Technical data Hazard warning lights . . . . . . . . . . . . . . . . 61
Indicator lamp . . . . . . . . . . . . . . . . . . . . 18
Head restraints
Front seats . . . . . . . . . . . . . . . . . . . . . . . 77
Rear seats . . . . . . . . . . . . . . . . . . . . . . . . 78
Headlamp converter . . . . . . . . . . . . . . . . . . 59
Headlight flasher . . . . . . . . . . . . . . . . . . . . . 62
Headlight range control . . . . . . . . . . . . . . . 60
Malfunction . . . . . . . . . . . . . . . . . . . . . . 39
Headlights . . . . . . . . . . . . . . . . . . . . . . . . . . 57
adaptive light . . . . . . . . . . . . . . . . . . . . . 61
Changing dip settings . . . . . . . . . . . . . . 59
Driving abroad . . . . . . . . . . . . . . . . . . . . 59
Headlight range control . . . . . . . . . . . . 60
Washer system . . . . . . . . . . . . . . . . . . . . 67
Heated
Exterior mirrors . . . . . . . . . . . . . . . . . . . 70
Front seats (deluxe automatic air
conditioner) . . . . . . . . . . . . . . . . . . . . 114
Rear seats . . . . . . . . . . . . . . . . . . . . . . . 115
Rear window . . . . . . . . . . . . . . . . . 98, 106
Washer jets . . . . . . . . . . . . . . . . . . . . . . . 65
Heated rear window . . . . . . . . . . . . . . 98, 106
Heating
Deluxe automatic air conditioner . . . . 93
Deluxe automatic air conditioner plus . .
101
HomeLink . . . . . . . . . . . . . . . . . . . . . . . . . . 179
Horn . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
IIgnition key
Emergency release . . . . . . . . . . . . . . . . 46
Safety interlock . . . . . . . . . . . . . . . . . . 116
Ignition lock . . . . . . . . . . . . . . . . . . . . . . . . 116
Malfunction . . . . . . . . . . . . . . . . . . . 34, 39
Immobiliser . . . . . . . . . . . . . . . . . . . . . . 14, 43
Indicator lamps . . . . . . . . . . . . . . . . . . . . . . 15
adaptive cruise control . . . . . . . . . . . . 134
Cruise control system . . . . . . . . . . . . . . 19
Glow plug system . . . . . . . . . . . . . . . . . 16
Main beam headlights . . . . . . . . . . . . . 18
Overview . . . . . . . . . . . . . . . . . . . . . . . . . 15
Trailer turn signals . . . . . . . . . . . . . . . . 18
Turn signals . . . . . . . . . . . . . . . . . . . . . . 18
Inflation pressures (tyres) . . . . . . . . . 39, 268
Inspection intervals . . . . . . . . . . . . . . . . . . . 24
Instrument cluster . . . . . . . . . . . . . . . . . . . . 11
Instrument lighting . . . . . . . . . . . . . . . . . . . 59
Interior lights
Dimming . . . . . . . . . . . . . . . . . . . . . . . . . 63
Front . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
Rear . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
Interior mirrors
SeeMirrors . . . . . . . . . . . . . . . . . . . . 68, 69
Interior monitor . . . . . . . . . . . . . . . . . . . . . . 50
Intermittent wipe . . . . . . . . . . . . . . . . . . . . . 65
Rain sensor . . . . . . . . . . . . . . . . . . . . . . . 65
ISOFIX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 218
JJack . . . . . . . . . . . . . . . . . . . . . . . . . . . 283, 290
Jacking points . . . . . . . . . . . . . . . . . . . . . . 290
Jump-starting . . . . . . . . . . . . . . . . . . . . . . 293KKey-operated switch for front passenger's
airbag . . . . . . . . . . . . . . . . . . . . . . . . . 208
Keys . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Emergency key . . . . . . . . . . . . . . . . . . . . 45
Replacement keys . . . . . . . . . . . . . . . . . 43
Replacing the battery . . . . . . . . . . . . . . 45
Kick-down feature . . . . . . . . . . . . . . . . . . . 165Llane assist
Changing settings on the MMI . . . . . . 147
Description . . . . . . . . . . . . . . . . . . . . . . 145
Indicator lamp in instrument cluster . 145
Instrument cluster display . . . . . . . . . 146
Switching on and off . . . . . . . . . . . . . . 145
Leather care
Alcantara . . . . . . . . . . . . . . . . . . . . . . . . 250
Natural leather . . . . . . . . . . . . . . . . . . . 249
leaving home . . . . . . . . . . . . . . . . . . . . . . . . 59
Light sensor . . . . . . . . . . . . . . . . . . . . . . . . . 57
Light sensor defective . . . . . . . . . . . . . . . . . 37
Lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
coming home . . . . . . . . . . . . . . . . . . . . . 59
Daytime running lights . . . . . . . . . . . . . 59
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Index339
Controls
Safety
Driving tips
General maintenance
Self-help
Technical data Towing bracket, removable . . . . . . . . . . . 235
Towing bracket, retrofitting . . . . . . . . . . . 240
Towline anchorage
Front . . . . . . . . . . . . . . . . . . . . . . . . . . . 296
Rear . . . . . . . . . . . . . . . . . . . . . . . . . . . . 297
Tow-starting . . . . . . . . . . . . . . . . . . . . . . . 297
Traction control system . . . . . . . . . . . . . . 222
Trailer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 232
Accessories . . . . . . . . . . . . . . . . . . . . . 235
Notes on towing . . . . . . . . . . . . . . . . . 234
Points to check before towing . . . . . . 232
Technical requirements . . . . . . . . . . . 232
Trailer stabilisation . . . . . . . . . . . . . . . . . . 233
Trailer turn signals
Indicator lamp . . . . . . . . . . . . . . . . . . . . 18
Trailer weights
SeePerformance, weights and
dimensions . . . . . . . . . . . . . . . . . . . . 323
Tread depth . . . . . . . . . . . . . . . . . . . . . . . . 270
Trip recorder . . . . . . . . . . . . . . . . . . . . . . . . 14
Trips, checklist . . . . . . . . . . . . . . . . . . . . . 187
Turn signals . . . . . . . . . . . . . . . . . . . . . . . . . 62
Indicator lamp . . . . . . . . . . . . . . . . . . . . 18
Type plate . . . . . . . . . . . . . . . . . . . . . . . . . 321
Tyre Mobility System . . . . . . . . . . . . . . . . 285
Tyre pressure . . . . . . . . . . . . . . . . . 39, 41, 268
Tyre pressure monitoring system . . . . 39, 41
Tyre repair kit . . . . . . . . . . . . . . . . . . . . . . 283
Tyre Mobility System . . . . . . . . . . . . . 285
Tyres
Inflation pressures . . . . . . . . . . . . 39, 268
Run flat tyres . . . . . . . . . . . . . . . . . . . . 274Tread wear indicators . . . . . . . . . . . . . 270
Tyre pressure monitoring system . 39, 41
Tyre service life . . . . . . . . . . . . . . . . . . 268
UUniversal transmitter . . . . . . . . . . . . . . . . 179
Unleaded fuel . . . . . . . . . . . . . . . . . . . . . . 251
Unlocking . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Central locking system . . . . . . . . . . . . . 48VVehicle data sticker . . . . . . . . . . . . . . . . . . 321
Vehicle identification data . . . . . . . . . . . . 321
Vehicle identification number . . . . . . . . . 321
Ventilation
Deluxe automatic air conditioner . . . . . 93
Deluxe automatic air conditioner plus . .
101
Ventilation slots . . . . . . . . . . . . . . . . . . . . . 192WWarning lamps . . . . . . . . . . . . . . . . . . . . . . 15
Airbag system . . . . . . . . . . . . . . . . . . . . 17
Anti-lock brake system . . . . . . . . . . . . . 19
Brake system . . . . . . . . . . . . . . . . . . . . . 20
Dynamic steering . . . . . . . . . . . . . . . 16, 36
Electro-mechanical parking brake . 19, 20
Electronic stabilisation program . . . . . 17
Emission control system . . . . . . . . . . . . 18
Engine management . . . . . . . . . . . . . . . 16Seat belt . . . . . . . . . . . . . . . . . . . . . . . . . 18
Suspension control . . . . . . . . . . . . . . . . 39
Warning triangle . . . . . . . . . . . . . . . . . . . . 282
Washer fluid level low . . . . . . . . . . . . . . . . . 37
Washing the vehicle
By hand . . . . . . . . . . . . . . . . . . . . . . . . . 244
Car wash . . . . . . . . . . . . . . . . . . . . . . . . 244
With high-pressure cleaner . . . . . . . . 244
Waxing . . . . . . . . . . . . . . . . . . . . . . . . . . . . 245
Weights
SeePerformance, weights and
dimensions . . . . . . . . . . . . . . . . . . . . 323
Wheel bolts . . . . . . . . . . . . . . . . . . . . . . . . 272
Wheel imbalance . . . . . . . . . . . . . . . . . . . . 268
Wheels . . . . . . . . . . . . . . . . . . . . . . . . 246, 268
Changing . . . . . . . . . . . . . . . . . . . . . . . . 288
Changing wheels round . . . . . . . . . . . 270
Window heating . . . . . . . . . . . . . . . . . 98, 106
Windows
Cleaning . . . . . . . . . . . . . . . . . . . . . . . . 246
De-icing . . . . . . . . . . . . . . . . . . . . . . . . . 246
Malfunctions . . . . . . . . . . . . . . . . . . . . . . 55
Windows (electric)
SeeElectric windows . . . . . . . . . . . . . . . 53
Windscreen washer fluid . . . . . . . . . . . . . 267
Windscreen wiper and washer system . . . 65
Windscreen wipers . . . . . . . . . . . . . . . . . . . 65
Changing blades . . . . . . . . . . . . . . . . . . 68
Defective . . . . . . . . . . . . . . . . . . . . . . . . . 39
Service position . . . . . . . . . . . . . . . . . . . 67
Winter conditions
Battery . . . . . . . . . . . . . . . . . . . . . . . . . . 263
Care of vehicle . . . . . . . . . . . . . . . . . . . 244
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