fuel consumption AUDI A5 2008 8T / 1.G Owners Manual

ForewordThank you for choosing the Audi A5.
The new Audi A5 combines the latest technology with numerous features for your comfort and
convenience. To help you get the best out of these features in everyday use, we recommend that
you read this Manual carefully so you can quickly become familiar with your vehicle in detail.
As well as information on how to use the controls and equipment, the Owner's Manual contains
important notes on care and maintenance. These are relevant to your safety and will help preserve
your car's value. The Manual also offers useful driving tips and advice, together with some sugges-
tions on how to drive your car with minimum impact on the environment.
In addition to this Owner's Manual, the Service Wallet also includes the Service Schedule for your
vehicle. This booklet contains important information on Audi service requirements and lists the
vehicle's fuel consumption figures. The Service Wallet also includes operating manuals for
optional on-board systems such as the radio, navigation and telephone. We recommend that you
keep the Service Wallet in the car at all times.
Should you have any further questions regarding your car or if you suspect that your owner's liter-
ature is not complete, please contact your Audi dealer or importer. They are always glad to answer
your queries and note any suggestions you may have.
We wish you safe and enjoyable motoring with your Audi A5.
AUDI AG
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Driver information system25
Controls
Safety
Driving tips
General maintenance
Self-help
Technical data
On-board computerApplies to vehicles: with on-board computerIntroduction
The on-board computer provides you with useful informa-
tion during a journey, including average and current fuel
consumption, average speed, fuel range and driving time.The following items of information are processed by the on-board
computer and can be shown one after the other on the display in the
instrument cluster.Fuel range
The estimated fuel range is displayed in km. It shows how far the
vehicle can be driven with the amount of fuel left in the tank,
assuming the same style of driving. The fuel range is displayed in
increments of 10 km.
The fuel range is calculated on the basis of the fuel consumption
over the last 30 kilometres. The fuel range will increase accordingly
if you drive in a more economical manner.
Average fuel consumption
This mode displays the average fuel consumption since the memory
was last cancelled in litres/100 km. If required, you can use this
display to adjust your driving style to achieve the desired fuel
consumption.
Current fuel consumption
The display shows the current fuel consumption in litres/100 km. If
required, you can use this display to adjust your driving style to
achieve the desired fuel consumption.
The computer calculates the fuel consumption every 30 metres. The
display switches to l/h (litres per hour) when the vehicle is
stationary.
Average speed
This mode shows the average speed driven since the memory was
last cancelled (in km/h).
Driving time
This display shows the period of time which has elapsed since the
memory was last cancelled.
Distance covered
This display shows the distance you have covered since the memory
was last cancelled.
Fig. 17 On-board
computer: Fuel rangeFig. 18 On-board
computer: Average fuel
consumption
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Driver information system 26
Note•
The displays for fuel consumption (average and current
consumption), fuel range and speed are shown in metric units. You
can change the measurement units on the MMI display.
•
The information in the memory is cancelled if the battery is
disconnected.
Applies to vehicles: with on-board computerMemory
The on-board computer has two automatic journey
memories.Press RESET button ⇒fig. 20 to switch back and forward
between the functions of on-board computers 1 and 2.
The number in the display ⇒fig. 19 indicates which of the two
memories is currently in use. The figure 1 means that the display is
showing the information in the single journey memory (on-board
computer 1). The figure 2 means that the display is showing the
information in the total journey memory (on-board computer 2).
Single journey memory (on-board computer 1)
The single journey memory processes the information on a journey
from the time the ignition is switched on until it is switched off. If the journey is resumed within two hours after the ignition is
switched off, the new figures are automatically included in the
calculation. The memory is automatically deleted when you resume
driving, if the journey is interrupted for more than two hours.
Total journey memory (on-board computer 2)
Unlike the single journey memory, the total journey memory is not
erased automatically. In this way, you can determine the period for
which you wish the on-board computer to supply figures.
Applies to vehicles: with on-board computerControls
The on-board computer is controlled by means of two
switches on the windscreen wiper lever.– Press the top or bottom of the function selector switch
⇒fig. 20. This displays the on-board computer read-
outs one after the other.The on-board computer can only be operated while the ignition is
switched on. When the ignition is switched on, the display shows
the function that was last selected.
As well as the figures from the on-board computer (computer 1 or
2), the display can also show information from the digital speedom-
Fig. 19 On-board
computer: Memory 1
AB
Fig. 20 Windscreen
wiper lever: On-board
computer controls
AA
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Driver information system27
Controls
Safety
Driving tips
General maintenance
Self-help
Technical data eter and navigation system*. Press the Reset button briefly to
switch back and forward between these displays.
Resetting figures to zero
To cancel one of the computer readings individually, select the
required function and press the RESET button for at least one
second. The following values can be reset to zero individually using
the Reset button:
•
Average fuel consumption
•
Average speed
•
Driving time
•
Distance covered
You can also cancel all the values in the single journey memory or
the total journey memory at the same time ⇒page 27.Note
The information in the memory is cancelled if the battery is
disconnected.
Applies to vehicles: with on-board computerBasic settings for the on-board computer
You can change the basic settings for the on-board
computer on the MMI* or on the sound system control
console.– Select: Function selector button > Instrument
cluster > On-board computer 1 or On-board computer 2.You can zero all the values in the single journey memory or the total
journey memory at the same time by selecting the Reset menu item.
You can also define which items of information you wish to have
displayed by the on-board computer. If one of these items is
switched off, it will not appear in the display. However, the corre-
sponding figures will still be registered by the on-board computer
and can be switched back on at any time so that they again appear
in the display.
AB
AB
Fig. 21 MMI display:
On-board computer
CAR
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Heating and cooling 100adequate cooling effect, you should not close these outlets
completely.Applies to vehicles: with deluxe automatic air conditionerEconomical operation of the air conditioner
Economical operation of the air conditioner will help to
save fuel.When the air conditioner is operating in the cooling mode it
reduces engine power and increases fuel consumption. To
ensure that the cooling mode is activated only when really
necessary, please note the following points:
– Switch off the cooling mode by pressing the AC button
(LED off) if you wish to save fuel.
– You should also switch off the cooling mode by pressing
the AC button (LED off) if you open the windows or the
tilting panorama roof* while driving.
– If the vehicle has heated up after standing in the sun,
open the windows and doors for a short time to cool the
vehicle.
For the sake of the environmentBy saving fuel you also reduce the amount of pollutants emitted
from your vehicle.
Deluxe automatic air conditioner -
basic settingsApplies to vehicles: with deluxe automatic air conditionerGeneral notes
You can change the basic settings for the air conditioner
on the MMI* or on the sound system control console.– Press the function selector button marked .
– Press the control button for AC ⇒fig. 114
2).
2)The display for the MMI basic differs slightly.
Fig. 114 MMI display:
AC menu optionFig. 115 MMI display:
Setup AC
CAR
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Heating and cooling109
Controls
Safety
Driving tips
General maintenance
Self-help
Technical data
Applies to vehicles: with deluxe automatic air conditioner plusEconomical operation of the air conditioner
Economical operation of the air conditioner will help to
save fuel.When the air conditioner is operating in the cooling mode it
reduces engine power and increases fuel consumption. To
ensure that the cooling mode is activated only when really
necessary, please note the following points:
– Switch off the cooling mode by pressing the AC button
(LED off) if you wish to save fuel.
– You should also switch off the cooling mode by pressing
the AC button (LED off) if you open the windows or the
tilting panorama roof* while driving.
– If the vehicle has heated up after standing in the sun,
open the windows and doors for a short time to cool the
vehicle.
For the sake of the environmentBy saving fuel you also reduce the amount of pollutants emitted
from your vehicle.
Deluxe automatic air conditioner plus
- basic settingsApplies to vehicles: with deluxe automatic air conditioner plusGeneral notes
You can change the basic settings for the air conditioner
on the MMI* or on the sound system control console.– Press the function selector button marked .
– Press the control button for AC ⇒fig. 124
3).
3)The display for the MMI basic differs slightly.
Fig. 124 MMI display:
AC menu optionFig. 125 MMI display:
Setup AC
CAR
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Your vehicle and the environment 206safety reasons, the dip settings may only be changed by a qualified
workshop.
For further information, please consult an Audi dealer or other qual-
ified workshop.
Unleaded petrol
A car with catalytic converter must not be run with leaded petrol
⇒page 205. Before driving abroad make sure that unleaded petrol
is available there.How to improve economy and minimise pollutionFuel economy, environmental impact and wear on the engine,
brakes and tyres depend largely on the way you drive the vehicle. By
adopting an economical driving style and anticipating the traffic
situation ahead, you can reduce fuel consumption by 10-15%. The
following section gives you some tips on lessening the impact on
the environment and reducing your operating costs at the same
time.
Anticipate 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
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Your vehicle and the environment207
Controls
Safety
Driving tips
General maintenance
Self-help
Technical data 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 243 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 unneccessary 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.
Save electrical energy
The engine drives the alternator to generate electricity. This means
that fuel consumption rises when more power is required for elec-
trical equipment. Switch off electrical equipment when it is not
needed. Electrical equipment which uses a lot of electricity includes
the blower (at a high setting), the rear window heating and the seat
heating*.
Environmental compatibilityEnvironmental protection is a top priority in the design, choice of
materials and production of your new Audi.Design measures for economical recycling
•
Joints and connections designed for ease of dismantling
•
Modular construction to facilitate dismantling
•
Increased use of single-grade materials
•
Plastic parts and elastomers are labelled in accordance with ISO
1043, ISO 11469 and ISO 1629
Choice of materials
•
Nearly all materials used can be recycled
•
Similar types of plastics grouped together for easy recycling
•
Recycled materials used in manufacture
•
Reduced vapour emissions from plastics
•
CFC-free refrigerant in air conditioner
Compliance with the laws prohibiting the use of: Cadmium,
asbestos, lead, mercury and chrome VI.
Manufacturing methods
•
Using recycling material for manufacturing plastic parts
•
Solvent-free cavity sealing
•
Solvent-free wax for protecting the vehicles in transit
•
Solvent-free adhesives
•
No CFCs used in production
•
Surplus materials used extensively for energy conversion and
building materials
•
Overall water consumption reduced
•
Heat recovery systems
•
Water-soluble paint
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Wheels and tyres 244
– 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 243, fig. 231.
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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Wheels and tyres 248In winter road conditions winter tyres will considerably improve the
car's handling. Due to their type of construction (width, rubber
compound, tread pattern), summer tyres give less grip on ice and
snow. This applies particularly to vehicles equipped with wide
section tyres or high speed tyres (code letters H, V or Y on the side-
wall).
Only use winter tyres of the correct type approved for your vehicle.
The sizes of the winter tyres approved for your vehicle are listed in
the vehicle's documents (e.g. EC Certificate of Conformity or COC
document
6)). The vehicle documents vary depending on the
country of residence. Also refer to ⇒page 245.
Winter tyres are no longer fully effective when the tread is worn
down to a depth of 4 mm.
The performance of winter tyres is also severely impaired by ageing,
even if the tread is still much deeper than 4 mm.
Winter tyres are subject to the following maximum speed limits
according to speed rating code letter: ⇒
In Germany vehicles capable of exceeding these speeds must have
an appropriate sticker attached so it is visible to the driver. Suitable
stickers are available from Audi dealers and specialist retailers.
Please note regulations to this effect in your country.“All-weather” tyres can also be used instead of winter tyres.
Using winter tyres with V-rating
Please note that the generally applicable 240 km/h speed rating for
winter tyres with the letter "V" is subject to technical restrictions;
the maximum permissible speed for your vehicle may be signifi-
cantly lower. The maximum speed limit for tyres with a V-rating
depends directly on the maximum axle weights for your car and on
the listed weight rating of the tyres being used.
It is best to contact an Audi dealer to check the maximum speed
which is permissible for the V-rated tyres fitted on your car on the
basis of this information.
WARNING
Exceeding the maximum speed permitted for the winter tyres
fitted on your car can cause tyre failure, resulting in a loss of
control of the vehicle – risk of accident.
For the sake of the environment
Summer tyres should be fitted again as soon as possible; they give
better handling on roads which are free of snow and ice. Summer
tyres produce less rolling noise, do not wear down as quickly and,
most importantly, reduce fuel consumption.Snow chains
Snow chains will improve the vehicle's handling on snow-
covered roads.– Snow chains can be used on the front wheels only.
– Keep your speed below 50 km/h.Snow chains will improve braking ability as well as traction in winter
conditions.
6)COC = certificate of conformitySpeed rating code letter
⇒page 245
Maximum speed limit
Q
160 km/h
S
180 km/h
T
190 km/h
H
210 km/h
V
240 km/h
(note restrictions)
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