Heating and air conditioning system
134
Close air outlet vents
– Turn the vertical thumbwheel into the end position.
Redirecting air flow
– Swivel upward or downward the gril le of the vents in order to
change the direction of the air flow using the vertically
arranged thumbwheel.
– Turn the horizontal thumbwheel on the vent to the right or left in order to change the air flow to the appropriate side.
You can control the air distribution to the air outlet vents via the buttons of
the operating part of the Climatronic ⇒page 130. Air outlet vents 3, 4
⇒ page 133, fig. 123 and 6 ⇒ page 133, fig. 124 can also be opened or
closed individually.
The air outlet vents 6 are only fitted on vehicles with higher centre
console.
Note
The air outlet vents 2 ensure in the ventilation and cooling mode for a
comfortable (no-draught) ventilation of the interior of the vehicle, also if the
air outlet vents 4 are closed.
Auxiliary heating (auxiliary heating and
ventilation)*
Description
The auxiliary heating (auxiliary heating and ventilation)
heats or supplies the interior of the vehicle with fresh air
independent of the engine.
Auxiliary heating (auxiliary heating )
The auxiliary heating (auxiliary heating) functions in connection with the
heater or with the Climatic or Climatronic.
It can be used when stationary, when engine is switched off for preheating
of the vehicle as well as while driving (e.g. during the heating phase of the
engine).
The auxiliary heating (auxiliary heating) warms up the coolant during the
combustion of fuel from the vehicle tank. The coolant warms up the air,
which (if the blower speed is not set to zero) flows into the occupant
compartment.
6)
Auxiliary ventilation
The auxiliary ventilation enables fresh air to flow into the vehicle interior
by switching on the blower, if the blower speed is not set to zero, whereby
the interior temperature is effectively decreased (e.g. with a vehicle
parked in the sun).
6)However the coolant does not warm up the engine.
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Heating and air conditioning system
136
The last programmed pre-set time remains active.
The active pre-set time can be changed in the menu Aux. Heating in the
menu Activation by selecting a pre-set time.
The prerequisite for the correct switching on of the auxiliary heating (auxil-
iary heating and ventilation) according to the programmed pre-set time is
the correct setting of the current time ⇒page 17 and weekday ⇒ page 135.
If the system is running, a warning light in the button for direct switching
on/off of the auxiliary heating lights up.
The running system deactivates after expiration of the operating period or
is deactivated earlier by pressing the button for direct switching on/off of
the auxiliary heating ⇒page 136.
The deactivation of a desired pre-set time can be performed by selecting
the menu Deactive in the menu Active .
It is possible to re-establish the factory setting using the menu Factory
setting in the menu Aux. Heating .Direct switching on/off
Fig. 126 Button for direct switching on/off of the auxiliary heating (auxiliary
heating and ventilation) on the operating part of the Climatic
The auxiliary heating (auxiliary heating and ventilation) can be switched
on or off at any time directly using the button on the operating part of
the Climatic ⇒fig. 126 , if necessary the operating part of the heating
⇒ page 119, fig. 116 or the operating part of the Climatronic ⇒page 130,
fig. 122 .
The auxiliary heating system (auxiliary heating and ventilation) switches
off automatically after expiration of the set operating period in the menu
Running time , if it is not switched off beforehand by you.
WARNING
•The auxiliary heating must never be operated in closed rooms -
risk of poisoning!
•The auxiliary heating must not be running during refueling - risk
of fire.
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Heating and air conditioning system 137
Using the systemSafetyDriving TipsGeneral MaintenanceBreakdown assistanceTechnical Data
•The exhaust pipe of the auxiliary heating is located on the
underside of the vehicle. Therefore do not place the vehicle, if you
wish to operate the auxiliary heating, in such a way that the exhaust
gases of the auxiliary heating can come easily into contact with
inflammable materials (e.g. dry grass) or easily inflammable
substances (e.g. fuel run out).
Note
•If the auxiliary heating runs, the fuel consumption comes from the
vehicle tank. Therefore the auxiliary heating should not be operated, if
there is very little fuel in the tank.
•The exhaust pipe of the auxiliary heating, which is located on the
underside of the vehicle, must not be clogged and the exhaust flow must
not be blocked.
•If the auxiliary heating and ventilation is running, the vehicle battery
discharges. If the auxiliary heating and ventilation has been operated
several times over a longer period, the vehicle must be driven a few kilom-
eters in order to recharge the vehicle battery.
•The auxiliary heating only switches the blower on, if it has achieved a
coolant temperature of approx. 50 °C.
•At low outside temperatures, this can result in a formation of water
vapour in the area of the engine compartment. This is quite normal and is
not an operating problem.
•After switching off the auxiliary heating, the coolant pump runs for a
short period.
•The auxiliary heating and ventilation does not switch on or comes on,
if the vehicle battery indicates a low loading state.
•The auxiliary heating (auxiliary heating) switches on, if in the informa-
tion display: Please refuel! is indicated or was indicated before switching
off the ignition.
•When driving, the auxiliary heating can only be switched on, if the exte-
rior temperature is lower than 5 °C.
•The air inlet in front of the windscreen must be free of ice, snow or
leaves in order to ensure that the auxiliary heating operates properly.
•So that the warm air can flow into the vehicle interior after switching on
the auxiliary heating (auxiliary heating), the control dial ⇒page 119,
fig. 116 must be turned up to the stop to the right when heating. With
Climatic and Climatronic, you can maintain the temperature normally
selected by you (we recommend 22 °C). It is recommended to put the air
flow in the position
. For heating and climatic put the blower switch
⇒ page 119, fig. 116 if necessary ⇒page 124, fig. 119 in the position 2.
WARNING (continued)
AA
AB
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Starting-off and Driving139
Using the systemSafetyDriving TipsGeneral MaintenanceBreakdown assistanceTechnical Data
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 deployed.
Ignition lock
Petrol engines
- ignition switched off, engine off, the steering can be locked.
- ignition switched on
- start engine
Diesel engines - interruption of fuel supply, ignition switched off, engine off, the
steering can be locked. - 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.
- start engine
Applies to all models:
Position
To lock the steering , with the ignition key withdrawn, turn the steering
wheel until 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
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
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 when one releases the key.
The ignition key must be turned back into position 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.
Ignition key withdrawal lock (automatic gearbox)
You can only withdraw the ignition key after switching off the ignition if the
selector lever is in position P.
WARNING (continued)
Fig. 129 Ignition lock
positions
A1
A2
A3
A1
A2
A3
A1
A2
A3
A2
A1
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Starting-off and Driving141
Using the systemSafetyDriving TipsGeneral MaintenanceBreakdown assistanceTechnical Data
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 288.
•Contact the nearest specialist garage to obtain professional assist-
ance.
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 temperature.
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 ve hicle 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 288.
•Contact the nearest specialist garage to obtain professional assist-
ance.
Starting the engine after the 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 the engine off
– The engine can be switched off by turning the ignition key from position ⇒page 139, fig. 129 into position .
WARNING
•Never switch off the engine before the vehicle is stationary - risk
of accident!
•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.
A1
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Automatic gearbox149
Using the systemSafetyDriving TipsGeneral MaintenanceBreakdown assistanceTechnical Data
Automatic gearbox
6-speed automatic gearbox*
Introduction
Your car is equipped with an electronically controlled 6-speed automatic
gearbox. Shifting up and also down through the gears is performed auto-
matically.
At the same time this is a conventional automatic gearbox. The maximum
speed is reached in the 5th gear. The 6th gear serves as an economic
driving programme, which is intended to reduce the fuel consumption.
Information for driving wi th an automatic gearbox
Shifting up and down through the gears is performed auto-
matically.
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 153.
Starting-off and Driving
– Depress the brake pedal and hold 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 150, and then release the Shiftlock button. – Wait a moment until the gearbox has shifted (a slight engage-
ment nudge can be felt).
– Release the brake pedal and depress the accelerator ⇒.
Stopping for a short time
– The selector lever position N does not have to be selected
when stopping just for a short time, such as at 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 140.
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 drive position in the
selector lever.
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Automatic gearbox
152
in the instrument cluster as a reminder for the driver when the selector
lever is in position P and N
In addition, the symbol
for the automatic selector lever lock in the shift
gate lights up.
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 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 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 - 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 postion P.
Kickdown function
The kickdown function provides you with maximum accel-
eration power.
Depressing the accelerator pedal allows the kickdown function to be acti-
vated 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 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 engine has reached its maximum revolu-
tions 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 favour-
able effect on your fuel consumption.
Adopting a sporty style of driving with rapid movements of the acceler-
ator 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 driving 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
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Automatic gearbox DSG
160
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 favour-
able effect on your fuel consumption.
Adopting a sporty style of driving with rapid movements of the acceler-
ator 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 driving 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 allows you to accelerate
rapidly (e.g. when overtaking) without having to depress the accelerator
pedal fully into the kickdown range. The original programme will be reac-
tivated to match your particular style 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 down into the Tiptronic position, in order to exploit the engine brake
torque.
Tiptronic
The Tiptronic allows the driver to also shift gears manually.
Fig. 143 Selector
lever: Manual shifting
of gears
Fig. 144 Information
display: Manual
shifting of gears
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