
Heating and air conditioning system
86Using the air conditioning system economicallyThe compressor on the Climatic uses powe
r from the engine when in cooling mode
which will effect the fuel consumption. It recommended to open the windows or the
doors of a vehicle for which the interior
has been strongly heated through the effect
of direct sunlight in order to allow the
heated air to escape. The cooling system should not be switched
on while travelling when the window is
open. The desired interior temperature can also be achieved without switching in the cooling system just by switching to fresh air mode.
For the sake of the environment
When you economize on fuel, you also reduce pollutant emissions.Operational malfunctionsIf the cooling system does not operate at outside temperatures higher than +5 °C, there is a problem in the system. The reasons for this may be:
The fuse of the Climatic is defective. Check the fuse, replace it if necessary
page 195.
The cooling system has switched off automatically for a short time because the
coolant temperature of the engine is too hot
page 16.
If you are not able to rectify the operational
problem yourself, or if the cooling capacity
decreases, switch the cooling system off. Contact a specialist garage. If there is a fault at the Climatronic, all symbols on the display flash after switching on the ignition for 15 seconds. Contact a specialist garage.
Climatronic* (automatic air conditioning)Description The Climatronic system is a combinat
ion of an automatic heating, fresh
air and cooling system which provides optimal comfort for the occu- pants of the car.The Climatronic maintains a constant temperat
ure fully automatically, once it has been
set. This is achieved by automatically varying the temperature of the outflowing air, the blower stages and the air distribution. The system also takes into account sunlight which eliminates the need to
alter the settings manually. The
automatic mode
page 88 ensures maximum wellbeing of the
occupants at all times of the year.
Description of Climatronic system The cooling operates only if the following conditions are met:
engine running,
outside temperature above approx. +2°C,
switched on.
If the cooling system is switched on, th
e temperature and air humidity drops in the
vehicle. The wellbeing of the occupants of the car is enhanced as a result of this partic-ularly at high outside temperatures and a high air humidity. The system prevents the windows misting up during the cold season of the year. The heating effect is dependent upon the coolant temperature, thus full heat output only occurs when the engine has reached its operating temperature. It is possible to briefly activate recirculat
ed air mode in order to enhance the cooling
effect
.
The air inlet in front of the windscreen must be free of ice, snow or leaves in order to ensure that the heating and cooling systems operate properly. The AC compressor is switched off at a high
coolant temperature in order to provide
cooling at a high load of the engine. After switching on the cooling
Condensation
from the evaporator of the air condi-
tioning may drip down and form a puddle be
low the vehicle. This is quite normal and
not an indication of a leak!
AC
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Starting-off and Driving
89
Using the system
Safety
Driving Tips
General Maintenance
Breakdown assistance
Technical Data
Starting-off and DrivingSetting steering wheel positionFig. 93 Adjustable steering wheel: Lever be
low the steering column / Safe distance to
steering wheelYou can set the height and the forward/back
position of the steering wheel to the
desired position. – Adjust the driver seat
page 59.
– Pull the lever below the steering wheel down
fig. 93
- 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. 93
- right. Not maintaining this minimum distance will mean that the
airbag 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 po
sition unintentionally when driving - risk of acci-
dent!
If you adjust the steering wheel furthe
r 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 po
sition. 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 inne
r steering wheel edge). In such
cases, injuries to the
arms, the hands and the head can occur
when the driver airbag is deployed.
Ignition lockPetrol engines - ignition switched off, engine
off, the steering can be locked.
- ignition switched on - start engine Diesel engines - interruption of fuel supply, ignition swit
ched off, engine off, the steering can be
locked. - heating glow plugs on, ignition switched onWARNING (continued)
Fig. 94 Ignition lock positions
A1A2A3A1A2
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Starting-off and Driving
91
Using the system
Safety
Driving Tips
General Maintenance
Breakdown assistance
Technical Data
Avoid high engine revolutions, full throttle and high engine loads as long as the
engine has not yet reached its normal oper
ating temperature - risk of damaging the
engine!
Vehicles which are fitted with an exhaust gas catalytic converter should not be tow-
started over a distance of more than 50 metres.
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 te
mperature more rapidly and the pollutant
emissions are lower.Petrol enginesThese 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 electric
al fuel pump is defect if the engine still
does not start. Check the fuse and replace it if necessary
page 195.
If the engine does not start, contact the nearest specialist garage to obtain profes-
sional assistance. It may be necessary, if the engine is
very hot
, to slightly depress the accelerator after
the engine has started.Diesel enginesGlow 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 tempera- ture. 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 195.
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 turnin
g the ignition key from position into
page 89, fig. 94
.
WARNING
Never switch off the engine before the ve
hicle is stationary - risk of accident!
The brake booster only operates when the engine is running. Greater phys-
ical effort for braking is required when en
gine 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 allowed it
to run at idling speed for about 2 minutes.
This prevents any accumulation of heat
when the engine is switched off.
A1
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Starting-off and Driving
95
Using the system
Safety
Driving Tips
General Maintenance
Breakdown assistance
Technical Data
WARNING
First ensure that it is not too high for the traffic conditions which exist at that moment before resuming the stored speed.Changing a stored speed You can also change the speed of
the vehicle without depressing the
accelerator.Fa s t e r–You can
increase
the stored speed without depressing the accelerator, by pressing
the rocker button
page 94, fig. 98
into the
RES+
position.
– The speed of the car will increase cont
inuously if you hold the rocker button
pressed in the
RES+
position. Once the vehicle ha
s reached the desired speed,
release the rocker button. The set speed is then stored in the memory.
Slower–You can
decrease
the stored speed by pressing the rocker button in the
SET-
position.
– Holding down the pushbutton pressed in the
SET-
position will cause the speed of
the vehicle to reduce continuously. On
ce the vehicle has reached the desired
speed, release the rocker button. The set speed is then stored in the memory.
– If you release the rocker button when the vehicle is travelling at a speed of less than
30 km/h, the speed is not stored, the memory is erased. It is then necessary to again store the speed with the rocker button in the position
SET-
after an increase in
speed of the vehicle to more than 30 km/hour.
Switching off the cruise control system temporarily–You can
switch off
the cruise control system
temporarily
by depressing the brake
pedal or clutch pedal, on vehicles fitted
with an automatic gearbox only with the
brake pedal.
– You can switch off temporarily the cruise control system, if you press the switch
in the middle position.
The set speed remains stored in the memory. The
Resumption
of the stored speed is achieved by releasing the brake or clutch
pedal, on vehicles fitted with automatic
gearbox only after releasing the brake pedal
and after shortly pressing the rocker button
page 94, fig. 98
into the position
RES+
.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
page 94, fig. 98
to the right into position
OFF
.
“START-STOP”*The “START-STOP” system helps you to save
fuel while at the same time reducing
exhaust pollutants and CO
2 emissions.
The system is automatically activated ea
ch time the ignition
is switched on.
The system switches the engine off automa
tically when the vehicle comes to a stand-
still, such as while wa
iting at a traffic light.
Information regarding the current state of the “START-STOP” system is indicated in the display of the instrument cluster.
AB
AB
AB
AA
AB
AA
Fig. 99 Centre console: Button for the START-STOP system
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Automatic gearbox
98Automatic gearboxAutomatic gearbox*Information for driving with the 6-speed automatic gearbox* Your car is equipped with a conv
entional 6-speed automatic gearbox.
The maximum speed is reached in the 5th gear. The 6th gear serves as an economic driving programme, which is intended to redu
ce the fuel consumption. Shifting up and
down through the gears is performed automa
tically. 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 102.
Starting-off and Driving– Depress the brake pedal fully and keep it depressed. – Press the Shiftlock button (button in ha
ndle of the selector lever), move the
selector lever into the
desired position, e.g.
D page 99, and then release the
Shiftlock button.
– Wait a moment until the gearbox has shif
ted (a slight engage
ment 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 stationary
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 page 90.
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 position
N is selected by accident while driving it is first necessary
to release pressure on the accelerator pedal and wait for idling speed of the engine to be reached before engaging a driv
e 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 vehi
cle is stationary, it is necessary to
hold the car with the brake pedal in all the positions of the selector lever (except 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 mean
s Direct shift gearbox (Direct shift gearbox).
Two independent clutches are needed for the power transmission between the engine and the gearbox. These replace the torque
converter of the conv
entional 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 inter- rupted. 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 102.
Starting-off and Driving– Depress the brake pedal fully and keep it depressed.
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Automatic gearbox
101
Using the system
Safety
Driving Tips
General Maintenance
Breakdown assistance
Technical Data
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 lo
ck will click into place if the lever 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 swit
ched off automatically into position
N when the
car is travelling at a higher speed. Shiftlock button The Shiftlock button in the hand
le of selector lever prevents certain selector lever posi-
tions being engaged inadvertently. The selector lever lock is cancelled when you press the Shiftlock button. Keylock
8)- Ignition key withdrawal lock
You can only withdraw the ignition key after switching off the ignition if the selector 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 activated 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 wi
thout taking into account the current
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 gearbox does not shift up into the highest gear until the en
gine has reached its maximum 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 programmeThe 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 po
ssible will have a favourable effect on your fuel consump-
tion. Adopting a
sporty style of driving
with rapid movements of the accelerator pedal
combined with sharp acceleration and freque
nt changes in speed, exploiting the top
speed of the car or depressing the accele
rator 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 driving is a continuous process. Irrespective of this it is, however, possible to switch or shift down into a dynamic shift programme by depressi
ng the accelerator rapidly. The gearbox
shifts down into a lower gear matching the speed of the car and this allows you to accelerate rapidly (e.g. when overtaking)
without having to depress the accelerator
pedal fully into the kickdown range. The or
iginal programme will be reactivated to
match your particular styl
e of driving once the gearbox has shifted up again.
When driving in hilly regions, the gears are selected to match uphill and downhill sections. This avoids the gearbox frequently
shifting up and down when negotiating an
uphill stretch. When driving downhill, it is
possible to shift do
wn into the Tiptronic
position, in order to exploit the engine brake torque.
8)Only valid for some countries.
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Intelligent Technology
143
Using the system
Safety
Driving Tips
General Maintenance
Breakdown assistance
Technical Data
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. Functional 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 comparison to the stored basic value, the warning light
lights up. Inflate all tyres to the
specified inflation pressure
page 178, “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 manoeuvr
es. Please stop the vehicle without
delay at the nearest possible stop and in
spect the tyres and their inflation pres-
sures.
The driver is responsible
for the correct tyre inflation pressures. For this
reason, the tyre inflation pressu
res 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 inflatio
n 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 ca
refully bring the vehicle to a standstill without sudden
steering movements and without sharp braking.Diesel particle filter* (diesel engine)In the diesel particle filter the resu
lting soot particles are collected and
burnt during the combustion of diesel fuel.Code
7GG
, 7MB
or 7MG
on the vehicle data sticker, see
fig. 132
, indicates that your
vehicle is equipped with a diesel particle fi
lter. The vehicle data st
icker is located 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 procedure, we
recommend not to drive regu
larly over short distances.
If the diesel particle filter is clogged or there is a fault, it is indicated by the warning light
page 33, “Diesel particle filter*
(diesel engine)”.
WARNING
The diesel particle filter
achieves very high temp
eratures. 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,
heat shields or diesel particle filter. Fig. 132 Vehicle data sticker
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Intelligent Technology
144
When the engine reaches its operating
temperature, these substances might
ignite - risk of fire!
Note
When using diesel fuel with high sulphur content the life of the diesel particle filter
is clearly reduced. A specialist
garage will be able to tell you which countries use only
diesel fuel with high sulphur content.
WARNING (continued)
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