Starting-off and Driving
Setting steering wheel position Fig. 81 Adjustable steering wheel: Lever below the steering column/Safe distance to steering
wheel
You can set the height and the forward/back position of the steering wheel to the
desired position.
–
Adjust the driver seat ⇒ page 52.
– Pull the lever below the steering wheel down ⇒ fig. 81 - left ⇒ .
– Set the steering wheel to the desired position (concerning height and forward/
back position).
– Then push the lever up against the steering column until it locks into place. WARNING
● You must not adjust the steering wheel when the vehicle is moving!
● The driver must maintain a distance of at least 25 cm to the steering wheel
⇒ fig. 81 - right. Not maintaining this minimum distance will mean that the air-
bag system will not be able to properly protect you - hazard!
● For safety reasons the lever must always be firmly pushed up to avoid the
steering wheel altering its position unintentionally when driving - risk of acci-
dent! WARNING (Continued)
● If you adjust the steering wheel further towards the head, you will reduce
the protection offered by the driver airbag in the event of an accident. Check
that the steering wheel is aligned to the chest.
● When driving, hold the steering wheel with both hands firmly on the outer
edge in the 9 o'clock and 3 o'clock position. Never hold the steering wheel
firmly in the 12 o'clock position or in another way (e.g. in the middle of the
steering wheel or at the inner steering wheel edge). In such cases, injuries to
the arms, the hands and the head can occur when the driver airbag is de-
ployed.
Ignition lock Fig. 82 Ignition lock positions
Petrol engines 1 - ignition switched off, engine off, the steering can be locked.
2 - ignition switched on
3 - start engine
Diesel engines 1 - interruption of fuel supply, ignition switched off, engine off, the steering can
be locked.
2 - heating glow plugs on, ignition switched on
● You should not switch on any major electrical components during the heating
period otherwise the vehicle battery will be drained unnecessarily. £82
Starting-off and Driving
3
- start engine
Applies to all models:
Position 1 To
lock the steering , with the ignition key withdrawn, turn the steering wheel un-
til the steering locking pin is heard to engage. You should always lock the steering
as a general rule if you leave your vehicle. This acts as a deterrent against possible
theft of your vehicle ⇒ .
Position 2 Move the steering wheel back and forward a little if the ignition key cannot, or
cannot easily be turned into this position, in order to release the steering lock.
Position
3 The engine is started in this position. At the same time switched on low beam or
main beam or other electrical components with major power consumption are
briefly switched off. The ignition key moves back into position
2 when one relea-
ses the key.
The ignition key must be turned back into position 1 each time before starting
the engine again. The starter repeat lock in the ignition lock prevents the starter
being engaged when the engine is running and thus getting damaged. WARNING
● When driving, the ignition key must always be in the position 2 (ignition
switched on) without the engine running. This position is indicated by the
warning lights coming on. If this is not the case, it could result in unexpected
locking of the steering wheel - risk of accident!
● Do not withdraw the ignition key from the lock until the car has come to a
stop. The steering lock can engage immediately - risk of accident!
● Always withdraw the ignition key if you are going to leave the vehicle,
even for a short time. This is particularly important if children are left in the
vehicle. The children might otherwise start the engine or operate electrical
equipment (e.g. power windows) - risk of injury! Starting the engine
General You can only start the engine only using an original ignition key.
● Place the gearshift lever into neutral (or place the selector lever to the posi-
tion P or N in the case of an automatic gearbox) and put on the handbrake firmly
before starting the engine.
● The clutch pedal should be fully depressed when starting the engine which
means that the starter only has to crank the engine.
● Let go of the key as soon as the engine starts otherwise there may be damage
to the starter.
The engine running noises may louder at first be louder for a short time after
starting the cold engine until oil pressure can be built up in the hydraulic valve
clearance compensation. This is quite normal and is not an operating problem.
If the engine does not start ...
You can use the battery of another vehicle as a jump-start aid ⇒ page 178. WARNING
● Never run the engine in non ventilated or enclosed areas. The exhaust
gases of the engine contain besides the odorless and colourless carbon mon-
oxide a poisonous gas - hazard! Carbon monoxide can cause unconsciousness
and death.
● Never leave your vehicle unattended with the engine running. CAUTION
● The starter may only be operated (ignition key position 3 ), if the engine is not
running. If the starter is immediately operated after switching off the engine, the
starter or the engine can be damaged.
● Avoid high engine revolutions, full throttle and high engine loads as long as
the engine has not yet reached its normal operating temperature - risk of damag-
ing the engine!
● Do not tow start the engine - danger of damaging the engine. On vehicles with
a catalytic converter, unburnt fuel may get into the catalytic converter where it
may ignite. This in turn may damage or destroy the catalytic converter. You can
use the battery of another vehicle as a jump-start aid ⇒ page 178, Jump-starting.£ 83
Starting-off and Driving Using the system Safety Driving Tips General Maintenance Breakdown assistance Technical data
For the sake of the environment
Never warm up the engine when the vehicle is standing. Drive off right away.
When driving the engine reaches its operating temperature more rapidly and the
pollutant emissions are lower.
Petrol engines These engines are fitted with a starter system which selects the correct fuel-air
mixture for every external air temperature.
●
Do not operate accelerator before and when starting engine.
● Interrupt the attempt at starting after 10 seconds if the engine does not start
right awayand wait for about 30 seconds before repeating the attempt.
● It is possible that the fuse on the electrical fuel pump is defect if the engine
still does not start. Check the fuse and replace it if necessary ⇒ page 182.
● If the engine does not start, contact the nearest specialist garage to obtain
professional assistance.
It may be necessary, if the engine is very hot, to slightly depress the accelerator
after the engine has started.
Diesel engines Glow plug system
Diesel engines are equipped with a glow plug system, the preglow period being
controlled automatically in line with the coolant temperature and outside temper-
ature.
The preglow indicator light
comes on after the ignition has been switched on.
You should not switch on any major electrical components during the heating
period otherwise the vehicle battery will be drained unnecessarily.
● You should start the engine immediately after the glow plug warning light
has gone out.
● The glow plug warning light will come on for about one second if the engine is
at a normal operating temperature or if the outside temperature is above +5°C.
This means that you can start the engine right away.
● Interrupt the attempt at starting after 10 seconds if the engine does not start
right awayand wait for about 30 seconds before repeating the attempt. ●
It is possible that the fuse on the diesel preglow system is defect if the engine
still does not start. Check the fuse and replace it if necessary ⇒ page 182.
● Contact the nearest specialist garage to obtain professional assistance.
Starting the engine after fuel tank has run dry
It may take longer than normal to start the engine after refuelling if the fuel tank
has run completely dry - up to one minute. This is because the fuel system must
first of all be filled while the attempting to start the engine.
Switching off the engine –
The engine can be switched off by turning the ignition key from position
⇒ fig. 82 into position 1 .
WARNING
● Never switch off the engine before the vehicle is stationary - risk of acci-
dent!
● The brake booster only operates when the engine is running. Greater
physical effort for braking is required when engine is switched off. Because if
you do not stop as normal, this can cause an accident and severe injuries. CAUTION
you should not switch the engine off right away at the end of your journey after
the engine has been operated for a lengthy period at high loads but should be al-
lowed it to run at idling speed for about 2 minutes. This prevents any accumula-
tion of heat when the engine is switched off. Note
● The radiator fan may continue running for a further 10 minutes or so after the
engine and the ignition have been switched off. The coolant fan may, however, al-
so switch on again after some time if the coolant temperature rises because of an
accumulation of heat in the engine or if the engine is warm and the engine com-
partment is additionally heated by strong sunlight.
● This is why particular care is required when carrying out any work in the en-
gine compartment ⇒ page 153
, Working in the engine compartment. 84
Starting-off and Driving
WARNING
First ensure that it is not too high for the traffic conditions which exist at that
moment before resuming the stored speed.
Switching off the cruise control system completely –
Press the switch A ⇒
fig. 86 to the right into position OFF .
“START-STOP” Fig. 87 Centre console: START-STOP
System button
The “START-STOP” system helps you to save fuel while at the same time reducing
harmful exhaust emissions and CO 2 emissions.
The function is automatically activated each time the ignition is switched on.
In the start-stop mode, the engine automatically switches to the vehicle's idle
phase, e.g. when stopped at traffic lights.
Information regarding the current state of the “START-STOP
” system is indicated
in the display of the instrument cluster.
Automatic engine shut down (stop phase)
– Stop the vehicle (where necessary, apply the handbrake).
– Take the vehicle out of gear.
– Take your foot off the clutch.
Automatic engine restart (start phase).
– Push down on the clutch. Switching the “START-STOP” system on and off
You can switch the “START STOP
” system on/off by pressing the button ⇒ fig. 87.
When start-stop mode is deactivated, the warning light in the button lights up.
If the vehicle is in the stop phase when manually switching off the system, the en-
gine starts immediately.
The START-STOP system involves complicated switching conditions, some of
them cannot be correctly determined without servicing. The general conditions
for the proper functioning of the START-STOP system are listed in the following
overview.
Conditions for the automatic engine shut down (stop phase) The gearshift lever is in Neutral.
The clutch pedal is not pressed!
The driver has fastened the seat belt.
The driver's door is closed.
The bonnet is closed.
The vehicle is at a standstill.
The factory-fitted towing device is not electrically connected to a trailer.
The engine is at operating temperature.
The charge state of the vehicle battery is sufficient.
The stationary vehicle is not on a steep slope or a steep downhill section.
The engine speed is less than 1200 1/min.
The temperature of the vehicle battery is not too low or too high.
The pressure in the brake system is sufficient.
The difference between the outdoor- and the set temperature in the interior is
not too great.
The vehicle speed since the last time the engine was switched off was greater
than 3 km/h.
No cleaning of the diesel particle filter takes place
⇒ page 27 The front wheels are not turned excessively (the steering angle is less than 3/4
of a steering wheel revolution).
Conditions for an automatic restart (start phase)
The clutch is pressed.
The max./min. temperature is set.
£ 89
Starting-off and Driving Using the system Safety Driving Tips General Maintenance Breakdown assistance Technical data
Automatic gearbox
Automatic gearbox Information for driving with the 6-speed automatic gearbox The maximum speed is reached in the 5th gear. The 6th gear serves as an eco-
nomic driving programme, which is intended to reduce the fuel consumption.
Shifting up and down through the gears is performed automatically. You can also,
however, switch the gearbox over into the
Tiptronic mode. This mode makes it
possible for you to also shift gears manually ⇒ page 95.
Starting-off and Driving
– Depress the brake pedal fully and keep it depressed.
– Press the Shiftlock button (button in handle of the selector lever), move the
selector lever into the desired position, e.g. D ⇒ page 93, and then release
the Shiftlock button.
– Wait a moment until the gearbox has shifted (a slight engagement nudge can
be felt).
– Release the brake pedal and depress the accelerator ⇒ .
Stop
– The selector lever position N does not have to be selected when stopping just
for a short time, such as at a cross roads. It is sufficient to hold the vehicle sta-
tionary using the foot brake. The engine can, however, be allowed just to idle.
Parking
– Depress the brake pedal and hold it depressed.
– Apply the handbrake firmly.
– Press and Shiftlock button in the selector lever, move the selector lever to P
and then release the Shiftlock button.
The engine can only be started when the selector lever is in position P or N . If the
selector lever is not in the P or N positions when locking the steering, switching
the ignition on or off or when leaving the engine on, the following message will
appear in the Information display Move selector lever to position P/N! or, in the
instrument cluster display: P/N. It is sufficient to engage selector lever position
P when parking on a flat surface.
When parking on a slope you should first apply the handbrake firmly and then
move the selector lever into position P. This is to ensure that there is no excessive
pressure acting on the lock mechanism and that it is easier to subsequently move
the selector lever out of position P. If the selector lever is not in the P positin
when the driver's door is open and the ignition is switched off, or if it is not in the
P position when the ignition is switched off and the driver's door is opened, the
following message will appear in the Information display: Move selector lever to
position P! or, in the instrument cluster display: P. The message disappears af-
ter a few seconds by switching on the ignition or by moving the selector lever into
the position P .
If the selector lever position N is selected by accident while driving it is first nec-
essary to release pressure on the accelerator pedal and wait for idling speed of
the engine to be reached before engaging a drive position in the selector lever. WARNING
● Do not depress the accelerator when changing the position of the selector
lever if the car is stationary and the engine is running - risk of accident!
● Never move the selector lever into position R or P when driving - risk of an
accident!
● When the engine is running and the vehicle is stationary, it is necessary to
hold the car with the brake pedal in all the positions of the selector lever (ex-
cept P and N) since the power transmission is never completely interrupted,
also not when the engine is idling - the vehicle creeps.
Information for driving with the automatic gearbox DSG The abbreviation DSG means Direct shift gearbox (Direct shift gear-
box).
Two independent clutches are needed for the power transmission between the
engine and the gearbox. These replace the torque converter of the conventional
automatic gearbox. Their shifting is matched in such a way that there are no jerks
when shifting the gear and the power transmission of the engine to the front
wheels is not interrupted. Shifting up and down through the gears is performed £ 91
Automatic gearbox Using the system Safety Driving Tips General Maintenance Breakdown assistance Technical data
WARNING (Continued)
● You must on no account unintentionally operate the throttle (e.g. by hand
from the engine compartment) if a drive position is engaged when the car is
stationary. The vehicle would otherwise immediately start off - also when the
handbrake is firmly applied - risk of an accident!
● You must move the selector lever into position P and firmly apply the
handbrake first before you or any other person opens the bonnet and starts
working on the engine when it is running - risk of accident! It is also essential
to observe all warnings ⇒ page 153, Working in the engine compartment.
Selector lever lock Automatic selector lever lock
With the ignition on, the selector lever is locked when it is in the positions P and
N. You must first of all depress the brake pedal in order to move the selector lever
out of this position. The warning light ⇒ page 25 lights up in the instrument
cluster as a reminder for the driver when the selector lever is in the positions P
and
N.
A time delay element ensures that the selector lever is not blocked when rapidly
switching over the position N (e.g. from R to D). This does, for example, allow one
to seesaw out a stuck vehicle. The selector lever lock will click into place if the lev-
er is in the N position for more than 2 seconds without the brake pedal being
pressed.
The selector lever lock is only active if the vehicle is stationary or moving at speed
of less than 5 km/hour. The lock is switched off automatically into position N
when the car is travelling at a higher speed.
Shiftlock button
The Shiftlock button in the handle of selector lever prevents certain selector lever
positions being engaged inadvertently. The selector lever lock is cancelled when
you press the Shiftlock button.
Keylock 1)
- Ignition key withdrawal lock
You can only withdraw the ignition key after switching off the ignition if the selec-
tor lever is in position P. If the ignition key is withdrawn, the selector lever is
blocked in position P. Kickdown function The kickdown function provides you with maximum acceleration
power.
Fully depressing the accelerator pedal allows the kickdown function to be activa-
ted in the desired driving program. This function has precedence over the driving
programme and serves for maximum acceleration of the vehicle when exploiting
the maximum power potential of the engine without taking into account the cur-
rent selector lever position ( D, S or Tiptronic ). The gearbox shifts down to one or
several gears in line with the driving state and the vehicle accelerates. The gear-
box does not shift up into the highest gear until the engine has reached its maxi-
mum revolutions for this gear range. WARNING
Please note that using the kickdown function can result in the driven wheels
spinning on a smooth or slippery road surface - risk of skidding!
Dynamic shift programme The automatic gearbox of your vehicle is controlled electronically. Shifting up and
down through the gears is performed automatically on the basis of pre-defined
driving programmes.
Adopting a moderate style of driving
will cause the gearbox to select the most
economical driving programme. Shifting up into a higher gear as soon as possible
and shifting down as late as possible will have a favourable effect on your fuel
consumption.
Adopting a sporty style of driving with rapid movements of the accelerator pedal
combined with sharp acceleration and frequent changes in speed, exploiting the
top speed of the car or depressing the accelerator pedal (kickdown function), will
cause the gearbox to switch over to this style of driving and shift down earlier
with frequent changes in gears in comparison to the moderate style of driving.
Selecting the most appropriate driving programme for the particular style of driv-
ing is a continuous process. Irrespective of this it is, however, possible to switch or
shift down into a dynamic shift programme by depressing the accelerator rapidly.
The gearbox shifts down into a lower gear matching the speed of the car and this £1)
Only valid for some countries. 94
Automatic gearbox
It is also possible under certain special accident situations that the front as well as
the side airbags and head airbags are deployed simultaneously.
The airbags
are not deployed in the case of minor frontal and side collisions, rear-
end collisions, tilting of the vehicle, and vehicle rollover.
Deployment factors
It is not possible to state globally which deployment conditions apply to the airbag
system in every situation as the circumstances which exist in the case of acci-
dents vary greatly. An important role in this case, for example, is played by factors
such as the type of object against which the vehicle impacts (hard, soft), the angle
of impact, the vehicle speed etc.
A decisive factor for the deployment of the airbags is the deceleration which oc-
curs during a collision. The control unit analyses the nature of the collision and ac-
tivates the relevant restraint system. If the vehicle deceleration which occurs and
is measured during the collision remains below the prescribed reference values
specified in the control unit, the airbags are not deployed although the vehicle
may well suffer severe damage to the bodywork as a consequence of the acci-
dent.
The airbags are not deployed if:
● ignition is switched off;
● a minor frontal collision;
● a minor side collision;
● a rear-end collision;
● Rollover of the vehicle. Note
● A grey white or red, non-harmful gas is released when the airbag is inflated.
This is perfectly normal and is not an indication of a fire in the vehicle.
● In the event of an accident in which the airbags are deployed:
– the interior lighting comes on (if the switch for the interior light is in the
door contact position),
– the hazard warning light is switched on;
– all the doors are unlocked;
– the fuel supply to the engine is interrupted. Front airbags
Description of the front airbags The airbag system is not a substitute for the seat belt!
Fig. 102 Driver airbag in the steering wheel/front passenger airbag in the dash panel
The front airbag for the driver is housed in the steering wheel
⇒ fig. 102
- left. The
front airbag for the front passenger is housed in the dash panel above the storage
compartment ⇒ fig. 102 - right. The installation positions are each marked with the
“AIRBAG” logo.
The front airbag system, in combination with three-point safety belts, offers addi-
tional protection for the head and chest area of the driver and front passenger in
the event of a frontal collision of major severity ⇒ in Important safety informa-
tion regarding the front airbag system on page 115.
The airbag is not a substitute for the seat belt, but is part of the complete passive
vehicle safety concept.
Please note that an airbag can only offer you optimal pro-
tection in combination with a seat belt which is fastened .
Apart from their normal protective function, a further task of the seat belts is to
also hold the driver and front passenger in a correct seated position in the event
of a frontal collision so as to enable the front airbags to offer the maximum pro-
tection.
You should therefore always fasten the seat belts, not only because this is re-
quired by law, but also for safety reasons and for your own protection ⇒ page 109,
Why seat belts?. £114
Airbag system
●
Press button ⇒ fig. 119
for more than 2 seconds. While pressing the but-
ton, the warning light lights up. At the same time the memory of the system is
erased and the new calibration is started, which is confirmed with an audible sig-
nal 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.
Warning light lights up
If the tyre inflation pressure of at least one wheel is insufficiently inflated in com-
parison to the stored basic value, the warning light ⇒ lights up.
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 pressure monitoring system does not take away the responsibility
from the driver for the correct tyre inflation pressure. Note
The tyre pressure monitoring system:
● does not replace the regular tyre inflation pressure control, because the sys-
tem 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.
● In order to ensure a proper functioning of the tyre inflation pressure-control
system, it is necessary to carry out the basic setting again every 10 000 km or 1x a
year. Diesel particle filter (diesel engine) In the diesel particle filter the resulting soot particles are collected
and burnt during the combustion of diesel fuel.
Fig. 120 Vehicle data sticker
Code 7GG , 7MB or 7MG on the vehicle data sticker, see ⇒ fig. 120, indicates that
your vehicle is equipped with a diesel particle filter. The vehicle data sticker is lo-
cated on the floor of the luggage compartment and is also stated in the Service
schedule.
The diesel particle filter filters the soot particles completely from the exhaust. The
soot is collected in the diesel particle filter and burnt regularly. To assist this pro-
cedure, we recommend not to drive regularly over short distances.
If the diesel particle filter is full or there is a fault, it is indicated by the warning
light
. WARNING
● The diesel particle filter achieves very high temperatures. Therefore do not
park at points where the hot filter comes into direct contact with dry grass or
other combustible materials - risk of fire!
● Never use additional underbody protection or corrosion-protection agents
for the exhaust pipes, catalytic converters, diesel particle filter or heat shields.
When the engine reaches its operating temperature, these materials might ig-
nite – risk of fire. Note
When using diesel fuel with high sulphur content the life of the diesel particle fil-
ter is clearly reduced. A specialist garage will be able to tell you which countries
use only diesel fuel with high sulphur content. 134
Intelligent Technology