Automatic gearbox111
Using the system
Safety
Driving Tips
General Maintenance
Breakdown assistance
Technical Data
Shifting up gears
– One-touch forward of the selector lever (in the Tiptronic position)
⇒page 110, fig. 131 .
Shifting down gears
– One-touch back of the selector lever (in the Tiptronic position) .It is possible to switch over to manual both when the car is stationary and also when
driving.
When you accelerate, the gearbox shifts up automatically in gears 1, 2, 3, 4 and 5
into the next higher gear just before the maximum permissible engine speed is
reached.
If you select a lower gear, the automatic gearbox does not shift down until there is
no risk of the engine overrevving.
If you operate the kickdown function, the gearbox shifts into a lower gear in line
with the vehicle speed and engine speed.Emergency programme
An emergency programme exists in the event of a fault in the system.The gearbox operates in a corresponding emergency programme if there are func-
tional faults in the gearbox electronics. This is indicated by all of the segments in the
display lighting up or going out.
It is possible to continue to move the selector lever into all the positions. In the
positions D and S the gearbox remains engaged in the 3rd gear. It is also possible to
continue to engage reverse gear in the position R.
The manual shift programme (Tiptronic) is switched off in the emergency mode.
If the gearbox has switched over to emergency mode, drive to the nearest
specialist garage in order to have the fault rectified.
Tow-starting and towing vehicle Tow-starting a vehicle
It is not possible to tow-start or push-start vehicles fitted with automatic gearbox.
you can use jump-start cables connected to the battery of another vehicle for
starting your car if the vehicle battery is flat ⇒page 211.
Towing a vehicle
Please pay attention to the following information if it comes necessary to tow-in
your car ⇒page 213.
A+
A-
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Seat belts 132Seat beltsWhy seat belts?It is a proven fact that seat belts offer good protection in accidents ⇒fig. 142. Thus
wearing a seat belt is a legal requirement in most countries.
Seat belts which have been correctly fastened and adjusted hold the occupants of
the car in the correct seated position ⇒fig. 142. The belts reduce the kinetic energy
(energy of motion) to a considerable extent. They also prevent uncontrolled move-
ments which, in turn, may well result in severe injuries.
The occupants of a vehicle who have fastened and correctly adjusted their seat belt,
profit to a major extent from the fact that the kinetic energy is optimally absorbed
by the belts. The structure of the front end of the vehicle and other passive safety
measures, such as the airbag system, also contribute to reducing the kinetic energy.
The energy produced is thus absorbed and there is less risk of injury.
Accident statistics prove that seat belts which are fastened and properly adjusted
reduce the risk of an injury and enhance the chance of survival in a major accident
⇒page 133.It is important that you pay attention to safety measures, particularly when trans-
porting children in the vehicle ⇒page 147, “Transporting children safely”.
WARNING
•
Fasten your seat belt each time before setting off, also when driving in
town! This also applies to the people seated at the rear - risk of injury!
•
Expectant women must also always wear a seat belt. This is the only way
of ensuring optimal protection for the unborn child ⇒page 134, “Fastening
three-point seat belts”.
•
It is important for the belt webbing to be properly routed if the seat belts
are to offer the maximum protection. You can see a description of how safety
belts should be fitted properly on the next pages.Note
Please comply with any differing legal requirements when using the seat belts.
Fig. 142 Driver wearing seat
belt
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Transporting children safely151
Using the system
Safety
Driving Tips
General Maintenance
Breakdown assistance
Technical Data
Child seats of group 0/0+The optimal solution for babies of up to about 9 months old weighing up to 10 kg
or children up to about 18 months old weighing up to 13 kg is a child safety seat
which is fastened in the opposite direction of travel ⇒fig. 162.
Child seats in which the child is facing with its back towards the direction of
travel should not be used on the front passenger seat when the vehicle is fitted
with a front passenger airbag ⇒page 148, “Use of child safety seats on the front
passenger seat”.
WARNING
•
It is essential to always switch off the front passenger airbag (airbags) at
a specialist garage or with the switch for front passenger airbag(s)* when
attaching in exceptional circumstances a child safety seat on the front
passenger seat where the child is seated with its back facing in direction of
travel (in some countries also when the child is facing the direction of travel)
⇒page 146.
•
In certain countries national legal provisions require that besides the
front passenger airbag also the side or head passenger airbags are deacti-
vated. Please comply with any differing national legal regulations regarding
the use of child safety seats.
•
If this is not done, a child seated on the front passenger seat may suffer
severe or even fatal injuries if the front passenger airbag or airbags are
deployed.
•
You should have the front passenger airbag (or airbags) reactivated just
as soon as you no longer use a child safety seat on the front passenger seat.
Child safety seats in Group 1Child seats in Group 1 are for babies and small children up to 4 years of age with a
weight of between 9 and 18 kilograms. It is best for children in the lower range of
this group, to use a child seat which allows the child to sit with its back to the direc-
tion of travel. It is best for children in the upper range of the Group 0+, to use a child
seat which allows the child to sit ⇒fig. 163 in the direction of travel.
Child seats in which the child is facing with its back towards the direction of
travel should not be used on the front passenger seat when the vehicle is fitted
with a front passenger airbag ⇒page 148, “Use of child safety seats on the front
passenger seat”.
Fig. 162 Child seats of group
0/0+
WARNING (continued)
Fig. 163 Child seat with
padded table in Group 1
installed on rear seat bench
facing the direction of travel
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Intelligent Technology 158BrakesWhat has a negative effect on braking efficiency?Wear-and-tear
Wear-and-tear to the brake pads is greatly dependent on the operating conditions
of the vehicle and your style of driving. Particularly if you drive a great deal in towns
and over short distances or if you adopt a sporty style of driving, it may be neces-
sary to have the thickness of the brake pads inspected at a specialist garage
between the service inspections.
Wet roads or road salt
There may be a certain delay before the brakes take full effect under certain condi-
tions such as when driving through water, during heavy rain showers or after the
vehicle has been washed in an automatic vehicle wash, since the brake discs and
brake pads may be moist or even have a coating of ice on them in winter. You
should dry the brakes as soon as possible by applying and releasing the brakes
several times.
There also may be a certain delay before the full braking efficiency is available when
driving on roads which have been treated with road salt if you have not used the
brakes for some considerable time beforehand. The layer of salt on the brake discs
and brake pads must first be rubbed off when you apply the brakes.
Corrosion
Corrosion on the brake discs and dirt on the bake pads occur if the vehicle has been
parked for a long period and if you do not make much use of the braking system.
We recommend cleaning the brake discs by firmly applying the brakes at a fairly
high speed if you do not make much use of the braking system or if surface corro-
sion is present ⇒.
Faults in the brake surface
If you notice that the braking distance has suddenly become longer and that the
brake pedal can be depressed further, it is possible that a brake circuit of the dual-
circuit brake system has failed. Drive, in such cases, to the nearest specialist garage
without delay in order to have the problem rectified. Drive at a reduced speed while
on your way to the dealer and adapt your style of driving to the higher brake pedal
pressure required.Low brake fluid level
An insufficient level of brake fluid may result in problems in the brake system. The
level of the brake fluid is monitored electronically ⇒page 33, “Brake system ”.
WARNING
•
Only apply the brakes for the purpose of drying and cleaning the brake
discs if the traffic conditions permit this. Do not place any other road users
in jeopardy.
•
When retrospectively mounting a front spoiler, solid wheel hubs etc. one
must ensure that the air supply to the front wheel brakes is not reduced
otherwise the braking system could run too hot.
•
Allow for the fact that new brake pads do not achieve their full braking
efficiency until approximately 200 kilometres. New brake pads must be first
“run in” before they develop their optimal friction force. You can, however,
compensate for this slightly reduced braking force by increasing the pres-
sure on the brake pedal. This guideline also applies to any new brake pads
installed at a future date.Caution
•
Never allow the brakes to rub by applying slight pressure if you do not wish to
brake the vehicle. This causes the brakes to overheat and can also result in a longer
braking distance and excessive wear.
•
Before negotiating a steep downhill section, please reduce your speed and shift
down into the next lower gear (manual gearbox) or select a lower driving stage
(automatic gearbox). This enables you to make full use of the braking power of the
vehicle and reduces the strain on the brakes. Any additional braking should be done
intermittently, not continuously.
Brake boosterThe brake booster boosts the pressure which you generate with the brake pedal.
The necessary pressure is only generated when the engine is running.
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Intelligent Technology 160brake pedal firmly and hold it in this position in order to achieve the shortest
possible braking distance.
The Brake Assist is able to help you achieve a shorter braking distance in emergency
situations by rapidly producing the pressure required in the brake system. It fully
exploits the attributes of the ABS. After you release the brake pedal, the function of
the Brake Assist is automatically switched off and the brakes operate in the normal
way.
The Brake Assist is part of the ESP system. If a fault occurs in the ESP, the Brake Assist
function is also not available. Further information on the ESP ⇒page 155.
WARNING
•
The Brake Assist is also not able to overcome the physical limits of your
vehicle in terms of the braking distance required.
•
Adapt your speed to the conditions of the road surface and to the traffic
situation.
•
The increased safety offered by the Brake Assist must not tempt you to
take a greater safety risk than otherwise.
Electrohydraulic power steeringThe power steering enables you to steer the vehicle with less physical force.
The steering characteristics can be changed by a specialist garage.
You will place great stresses on the power steering system if the steering is turned
to full lock when the vehicle is stationary. Turning the steering to full lock in such a
situation will be accompanied by noises.
It is still possible to fully steer the vehicle if the power steering fails or if the engine
is not running (vehicle being towed in). The only difference is that greater physical
effort is required.
It is possible that the hydraulic pump of the power steering will not run due to the
low vehicle network voltage if the battery has gone flat and the engine must started
with the help off jump leads. This condition will be indicated by lighting up of the
warning light.The power steering operates again if the battery is charged to a specific range when
engine is running. It also operates again, if the engine can be started with its own
battery.
If there is a fault in the power steering, the warning light lights up in the instrument
cluster
⇒page 26.
Caution
Do not leave the steering at full lock for more than 15 seconds when the engine is
running - risk of damaging the power steering!
Note
Have the steering inspected as soon as possible by a specialist garage if there is a
leak or fault in the system.Tyre inflation pressure-control system*The tyre inflation pressure-control system compares with the aid of the ABS sensors
the speed and also the rolling circumference of the individual wheels. If the tyre
inflation pressure is significantly changed and thus the rolling circumference of a
wheel, the warning light
lights up in the instrument cluster ⇒page 32. The tyre
inflation pressure-control system functions late or too sensitively if:
Fig. 172 Button for setting
the tyre inflation pressure
control value
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Intelligent Technology161
Using the system
Safety
Driving Tips
General Maintenance
Breakdown assistance
Technical Data
•
the structure of the tyre is damaged,
•
the vehicle is loaded to one side or with a load on the roof,
•
the wheels of an axle are loaded heavily (e.g. when towing a trailer or when
driving uphill or downhill),
•
the vehicle is operated in unfavourable winter conditions or on an unfirm
ground,
•
Snow chains or emergency wheel* are mounted,
•
the driver has a sporty style of driving (with sharp acceleration and high speed
when cornering).
Basic setting of tyre inflation pressure-control system
After changing the tyre inflation pressures or after changing one or several wheels,
a basic setting of the system must be carried out as follows.
•
Inflate all tyres to the specified inflation pressure ⇒page 198.
•
Switch on the ignition.
•
Press button
⇒page 160, fig. 172 for more than 2 seconds. While
pressing the button, the warning light
lights up. At the same time the basic
values are stored, which is confirmed with an acoustic sound and then the warning
light
goes out.
•
If the warning light
does not go out after the basic setting, there is a fault in
the system. Have the vehicle inspected by your nearest specialist garage.
Function description
After the basic setting of the system the “adaptation” of the tyre inflation pressures
and then the tyre pressure control in the individual tyres are performed.
Warning light
lights up
If the tyre inflation pressure of at least one wheel is insufficiently inflated in compar-
ison to the stored basic value, the warning light
⇒ lights up. Inflate all tyres
to the specified inflation pressure ⇒page 198, “Tyre life” and then perform a basic
setting of the system.
Warning light
flashes
If the warning light flashes, there is a system fault. Have the vehicle inspected by
your nearest specialist garage.
WARNING
•
When the warning light
lights up, immediately reduce the speed and
avoid sudden steering and brake manoeuvres. Please stop the vehicle
without delay at the nearest possible stop and inspect the tyres and their
inflation pressures.
•
The driver is responsible for the correct tyre inflation pressures. For this
reason, the tyre inflation pressures must be checked regularly.
•
Under certain circumstances (e.g. sporty style of driving, wintry or
unpaved roads) the warning light
can be delayed or does not light up at
all.
•
The tyre inflation pressure-control system does not take away the
responsability from the driver for the correct tyre inflation pressure.Note
The tyre inflation pressure-control system:•
does not replace the regular tyre inflation pressure control, because the system
cannot detect an even pressure loss;
•
cannot warn in case of very rapid tyre inflation pressure loss, e.g. in case of
sudden tyre damage. In this case carefully bring the vehicle to a standstill without
sudden steering movements and without sharp braking.
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Driving and the Environment163
Using the system
Safety
Driving Tips
General Maintenance
Breakdown assistance
Technical Data
Driving and the EnvironmentThe first 1 500 kilometres and then afterwardsA new engine
The engine has to be run in during the first 1 500 kilometres.Up to 1 000 kilometres
– Do not drive faster than 3/4 of the maximum speed of the gear in use,
that is 3/4 of the maximum permissible engine speed.
– Do not use full throttle.
– Avoid high engine revolutions.
– Do not tow a trailer.
From 1 000 up to 1 500 kilometres
– Increase the power output of the engine gradually up to the full
speed of the gear engaged, that is up to the maximum permissible
engine revolutions.During the first operating hours the engine has higher internal friction than later
until all of the moving parts have harmonized. The driving style which you adopt
during the first approx.1 500 kilometres plays a decisive part in the success of
running in your vehicle.
You should not drive at unnecessarily high engine revolutions even after the
running-in period is complete. The maximum permissible engine speed is marked
by the beginning of the red zone on the scale of the revolutions counter. Shift up
into the next higher gear on a vehicle fitted with manual gearbox before the red
zone is reached. During acceleration (depressing the accelerator) exceptionally
high engine speeds are automatically reduced, yet the engine is not protected
against too high engine speeds which are caused by incorrectly shifting down the
gears resulting in a sudden increase of the engine speeds above the permitted
maximum revolutions which can lead to engine damage.For a vehicle fitted with a manual gearbox the converse situation also applies: Do
not drive at engine revolutions which are too low. Shift down as soon as the engine
is no longer running smoothly.
Caution
All the speed and engine revolution figures apply only when the engine is at its
normal operating temperature. Never rev up an engine which is cold, neither when
the vehicle is stationary nor when driving in individual gears.
For the sake of the environment
Not driving at unnecessarily high engine revolutions and shifting to a higher gear as
early as possible are ways to minimise fuel consumption, operating noise levels as
well as protects the environment and contributes to a longer life and reliability of
the engine.New tyresNew tyres have to be “run in” since they do not offer optimal grip at first. You should
take account of this fact for the first 500 kilometres and drive particularly carefully.New brake padsAllow for the fact that new brake pads do not achieve their full braking efficiency
until approximately 200 kilometres. New brake pads must be first “run in” before
they develop their optimal friction force. You can, however, compensate for this
slightly reduced braking force by increasing the pressure on the brake pedal.
This guideline also applies to any new brake pads installed at a future date.
During the running-in period, you should avoid excessive stresses on the brakes.
This includes, for example, violent braking, particularly from very high speeds, and
also when crossing mountain passes.
s3f4.1.book Page 163 Thursday, June 18, 2009 11:07 AM
Driving and the Environment 164Catalytic converterProper operation of the emission control system (catalytic converter)
is of major significance for driving your vehicle in an environmen-
tally conscious way.Please refer to the following guidelines:
– For vehicles with petrol engine only refuel with unleaded petrol
⇒page 181, “Grades of petrol”.
– Never run the fuel tank completely empty.
– Do not switch off the ignition while you are driving the vehicle.
– Do not pour too much oil into the engine ⇒page 188, “Replenishing
engine oil”.
– Do not tow-start the vehicle over a distance of more than 50 metres
⇒page 214, “Tow-starting a vehicle”.If you drive your vehicle in a country in which unleaded petrol is not available, you
must have the catalytic converter replaced later when driving the vehicle into a
country in which use of a catalytic converter is mandatory.
WARNING
•
In view of the high temperatures which may be produced in the catalytic
converter, one should always park a vehicle in such a way that the catalytic
converter cannot come into contact with easily flammable materials below
the vehicle - a risk of fire!
•
Never use additional underbody protection or corrosion-protection
agents for the exhaust pipes, catalytic converters or heat shields. Such
substances might ignite when driving - risk of fire!
Caution
•
On vehicles fitted with a catalytic converter, never let the fuel tank run
completely empty. An irregular fuel supply can result in poor ignition or misfiring.
Unburnt fuel may get into the exhaust system and damage the catalytic converter.
•
Filling the tank even only once with leaded petrol will result in the catalytic
converter being destroyed.
•
If you detect misfiring, a drop in performance or irregular engine running when
driving, reduce your speed immediately and have the vehicle inspected by the
nearest specialist garage. The symptoms described may be caused by a fault in the
ignition system. Unburnt fuel may get into the exhaust system and damage the
catalytic converter.For the sake of the environment
Even if the exhaust system is operating properly, a sulphur-like exhaust odour may
be produced under certain operating conditions of the engine. This depends on the
sulphur content of the fuel. It is often sufficient to refuel with unleaded premium-
grade petrol of a different brand or at a different filling station.Driving in an economical and environmentally
conscious mannerGeneral
Your personal style of driving is a major factor.Your fuel consumption, any pollution of the environmental and the wear-and-tear
to the engine, brakes and tyres, depend essentially on three factors:•
your personal style of driving;
•
the conditions under which your vehicle is operated;
•
technical aspects.
You can easily improve your fuel economy by 10 - 15 percent by driving in an
economical way with foresight. This section is intended to provide you with a
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