Heating, Ventilation and Air conditioning157
Safety First
Controls and equipment
Practical tips
Technical Data
The , and buttons (which regulate air distribution) can either be
selected individually or in combination.
Automatic mode
Standard setting for all seasons.Switching on automatic mode
– Select a temperature between +18°C (64°F) and +29°C (86°F).
– Press the button
⇒page 156, fig. 132 .The automatic mode maintains a constant temperature inside the vehicle and
dehumidifies the air. Air temperature, air delivery and air distribution are
regulated automatically to reach the desired interior temperature as quickly
as possible, and then to maintain this temperature. The system automatically
compensates for any variations in the outside temperature and for the effect
of direct sunlight.
The automatic temperature regulation only operates at temperature settings
between +18°C and +29°C. If a temperature below +18°C is selected, LO
appears on the display. If a temperature is selected which is higher than
+29°C, the display will show HI. In the two extreme settings, the climate
control operates continuously with maximum cooling or heating output and the temperature is not regulated automatically. The temperature is not regu-
lated.
Note
By keeping the button on the driver's side pressed for several seconds,
the temperature of the passenger's side can be set to the temperature of the
driver's side or vice versa. The display indicates the new temperature value.Selecting the temperature
Separate temperatures can be selected for the driver's and
front passenger's side.– Press the or buttons below the displays
⇒page 156,
fig. 132 until the desired temperature is selected for the driver's
side or front passenger's side.The currently selected temperature setting is shown in the display above the
buttons.
By keeping the button on the driver's side pressed for several seconds,
the temperature of the passenger's side can be set to the temperature of the
driver's side or vice versa. The display indicates the new temperature value.
The previous temperature setting can be restored by resetting the display on
the driver's or passenger's side as required.
(centre buttons)
Adjusts blower speedAir to the windowsAir from the dashboard outletsAir to the footwells
Button(s)
Meaning
-+
AUTO
AUTO
AUTO
-+
-
+
AUTO
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Heating, Ventilation and Air conditioning
158Defrosting
The windscreen and side windows are defrosted or demisted
as quickly as possible.– To enable this mode, press the ⇒page 156, fig. 132 button.
– To disable, press the button again or select the button.The temperature is regulated automatically. The air output is increased to
maximum and most of the air comes out of outlets 1 and 2 ⇒page 161.
The air recirculation and ECON modes are switched off when the button is
pressed.Air recirculation: manual enabling
The air recirculation setting prevents fumes etc. from entering
the interior.Enabling air recirculation mode
–Press the ⇒page 156, fig. 132 ⇒ button.
Disabling air recirculation mode
– Press the button again or
– Press the button or
–Press the button.In this setting, the air in the vehicle is constantly recirculated. We recommend
using the air recirculation mode in the following circumstances:
•When driving through a tunnel or in queues of traffic, to prevent fumes
entering the interior of the vehicle.WARNING
Do not drive for too long with the air recirculation mode enabled because,
if the compressor is disconnected, the windscreen may mist up because no
fresh air is entering the interior of the vehicle, with the subsequent risk of
accidents.ECON Mode (economy)
ECON mode helps save fuel.– To enable, press the button ⇒page 156, fig. 132.
– To disable, press the button again or select the button.Air cooling is disconnected in ECON mode. The heating and the blower are
adjusted automatically. “ECON” stands for “Economy”. Disconnecting air
cooling (compressor) saves on fuel.
Please note that the interior temperature must not be lower than the outside
temperature in ECON mode. The blower does not cool or dehumidify the air in
the interior. The windows could therefore mist up.
On diesel vehicles, the supplementary heater is switched off in ECON mode
to save fuel.
Note
If the diode on the ECON button continues to light up when the ECON mode
has been switched off (i.e. the climate control has been switched on) this is
AUTO
AUTO
ECONECONECON
AUTO
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Heating, Ventilation and Air conditioning159
Safety First
Controls and equipment
Practical tips
Technical Data
due to a defect in one of the climate control components. If a malfunction
should occur, please contact a specialist garage.
Air recirculation: automatic activation*
If the outside air is polluted by diesel and petrol emissions,
an air purity sensor in the vehicle will automatically switch on
the air recirculation.Enabling air recirculation mode
– Press the button
⇒fig. 133 .
Disabling air recirculation mode
– Press the button again or
– Press the button or – Press button .
The automatic air recirculation mode should normally be left switched on at
all times.
The system is ready to operate approx. 30 seconds after the engine ignition
key has been turned. During this initial period, fresh air is fed into the car.
If the
air purity sensor in the air conditioning system detects a certain
concentration of fumes in the outside air, the control unit will either pass the
incoming air through the pollution filter or automatically switch on the air
recirculation. If there is a high concentration of pollution in the outside air,
the climate control automatically switches to air recirculation and the supply
of air from the outside is cut off. As soon as the level of pollution decreases,
air is fed into the vehicle from the outside again.
The automatic air recirculation operates for a maximum period of 12 minutes.
If the windows mist up when the automatic air recirculation is on, press the button immediately.
The automatic air recirculation switches itself off under certain circumstances
(for instance if or is selected). In “ECON” and at temperature of below
approx. 8°C below zero, the automatic air recirculation mode is limited to 12
seconds.Switching the temperature displa y from °C to °F and vice versa
The temperature display can be switched from °C (degrees
Celsius) to °F (degrees Fahrenheit) and vice versa.– Press and hold the button for recirculation mode and briefly
press the plus button of the left-hand temperature selector
⇒ page 156, fig. 132 .
Fig. 133 Button for auto-
matic air recirculation
AUTO
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Heating, Ventilation and Air conditioning
160Switching the climate control on/offSwitching the climate control off: models with an button
– Press the button. The climate control is switched off and the
supply of air from outside the car is cut off.
Switching the climate control off: models with a button
– Keep pressing the button for the blower until the display segment is empty. The climate control is switched off and the
supply of air from outside the car is cut off.
Switching the climate control on: models with an button
– Press the button again, or
– Press the button or
– Press one of the air distribution buttons , or .
Switching the climate control on: models with a button
– Press the button for the blower, or
– Press the button or
– Press one of the air distribution buttons , or .The climate control also starts to operate if one of the blower or temperature
selector buttons is pressed.
Blower speed
The automatically selected blower speed can be reduced or
increased manually.– Press the and buttons in the centre of the control panel ⇒page 156, fig. 132 to set the blower to the desired speed (and
regulate the volume of air delivery).The climate control system automatically regulates the blower speed
according to the interior temperature. However, you can also adjust the air
delivery manually. The current blower setting is illustrated by a bar in the
middle display (above the buttons).Automatic change of passenger temperatureIn order to set automatically the passenger temperature like the driver
temperature, press the button on the driver's side for 2 seconds
approximately. In order to set automatically the driver temperature like the
passenger's temperature, press the button on the passenger's side for
2 seconds approximately.
OFF
OFF
-
OFF
OFFAUTO
+AUTO
-+
-
+AUTO
AUTO
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Heating, Ventilation and Air conditioning
162Each of the three buttons has a specific function. The numbers relate to the
air outlets ⇒page 161, fig. 134.
Air directed to windows
This setting directs all the air to outlets 1 and 2. Unlike in setting , the
volume of air delivery remains the same.
Air to the driver/front passenger
All the air comes from outlets 3 and 4 in the dash panel and from the rear of
the centre console.
Air to the footwells
Most of the air emerges from outlets 5 and the outlets under the front seats.
Some of the air will also be issued from outlets 3 and 4.
Note
In all of the above air distribution settings, a small amount of air will still
come from the other outlets.Economical use of the climate control
Economical use of the climate control will help save fuel.Engine power is reduced and fuel consumption increases when the
climate control is in cooling mode. To ensure that the system is only
switched on when it is really necessary, please note the following
points:
– Select ECON mode if you wish to save fuel.
– Select ECON mode if you decide to open the windows or sun 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 environment
By saving fuel you also reduce the amount of pollutants emitted from your
vehicle.Key settings
When the ignition is switched on, the climate control settings
assigned to the key are selected automatically.The climate control settings selected are automatically stored and assigned
to the key in use. When the vehicle is started, the climate control automati-
cally selects the settings assigned to the key. Hence, every driver automati-
cally obtains his/her preferred settings without having to select them manu-
ally.
Note
Should another driver use the key and enter other settings, the previous
settings will be deleted.
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Driving
178To move the selector lever to position R, press in the interlock button and at
the same time press the brake pedal. Depending on the model, one or two
reversing lights will come on in selector lever position R (when ignition is
switched on).
N - Neutral (idling)
In this position the gearbox is in neutral ⇒.
D - Drive (forwards)
In this position, the gearbox selects the optimal transmission ratio
depending on the engine load, speed and the dynamic gear regulation
program (DRP).
Press the brake pedal when moving the selector lever from N to D if the
vehicle is stationary or at speeds below 5 km/h ⇒.
Under certain circumstances (e.g. when driving in mountains or towing a
trailer or caravan) it can be advantageous to switch temporarily to Tiptronic
mode ⇒page 181, so that the gear ratios can be selected manually to suit
the driving conditions.
S - Sport position
To drive in sports mode, select the position S. The engine power reserve is
used to its maximum. When accelerating the gear shifts will be noticeable.
Press the brake pedal when moving the selector lever from N to S if the
vehicle is stationary or at speeds below 5 km/h ⇒.
WARNING
•Never move the selector lever to R or P when driving. Failure to do so
could result in an accident.•In selector position D or S the vehicle must always be held with the foot
brake when the engine is running. This is because an automatic gearbox
still transmits power even at idling speed, and the vehicle tends to “creep”.
The throttle must on no account be opened inadvertently (for instance by hand from the engine compartment) when a gear is engaged with the
vehicle stationary. The vehicle could otherwise start moving immediately
(in some cases even if the parking brake is engaged) and possibly cause an
accident.
•To avoid accidents, apply the parking brake and put the selector lever
in position P before opening the bonnet and working on the vehicle with
the engine running. Please observe the important safety warnings
⇒ page 221, “Work in the engine compartment”.Note
•Applies to vehicles with tiptronic gearbox:•If the lever is moved accidentally to N when driving, release the acceler-
ator and let the engine speed drop to idling before selecting D or S again.•For the sake of fuel economy (and the environment), the gearbox ratios on
some models are designed so that maximum speed is only obtained when
the selector lever is at position S.WARNING (continued)
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Driving
180Applies to vehicles with tiptronic gearbox
When the accelerator pedal is pressed right down past the point of resistance
at full throttle, the gearbox will shift down to a lower gear, depending on road
speed and engine speed. The upshift to the next higher gear is delayed until
the engine reaches maximum rpm.
WARNING
P l eas e n o te t ha t i f t h e road s u r fa ce is s l i pp e r y o r w e t , t h e k ick- d ow n fe at u re
could cause the driving wheels to spin, which could result in skidding.Dynamic gear control program (DCP)
The automatic gearbox is controlled electronically.The vehicle is equipped with an electronically controlled gearbox. The gear
ratios are selected automatically according to preset gearshift programmes.
When you drive at moderate speeds the gearbox will select the most econom-
ical shift programme. It will then change up early and delay the downshifts to
give better fuel economy.
If you drive at higher speeds with heavy acceleration, if you open the throttle
quickly, or if you use the kick-down or the car's maximum speed, the gearbox
will automatically select the more sporty shift programmes.
The gearbox is self-adapting, and continuously selects the most suitable shift
programme. At the same time, the driver can also make the gearbox switch to
a more sporty programme by pressing the accelerator quickly. Depending on
road speed, this makes the gearbox shift down early into a lower gear ratio
for more rapid acceleration (for instance to pass another vehicle), without
having to press the accelerator all the way down into the kick-down position.
After the gearbox has shifted back up it returns to the original programme,
depending on your style of driving. Vehicles with multitronic® gearbox: the gearbox continuously adapts the
gear ratios to gradients. If the brake
pedal is pressed on a downhill gradient
the gearbox automatically shifts to a lower gear ratio. This increases the
engine braking effect.
Vehicles with tiptronic gearbox: in mountainous areas, the gearbox adapts
the gearshifts for uphill and downhill gradients. This prevents the gearbox
from shifting up and down unnecessarily on uphill gradients.
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Driving and the environment191
Safety First
Controls and equipment
Practical tips
Technical Data
Diesel engine particulate filter*
The diesel engine particulate filter eliminates soot produced
by burning diesel.The diesel engine dust filter eliminates most of the soot from the exhaust gas
system. Under normal driving conditions, the filter cleans itself. If the driving
conditions do not allow the filter to clean itself (for example, multiple short
trips) the filter will be obstructed by dust and pollen and the indicator
for
the diesel engine particulate filter indicator will light up. See section on
Warning Lights.
WARNING
•The diesel engine particulate filter may reach extremely high tempera-
tures; it should not enter into contact with flammable materials under-
neath the vehicle. Failure to comply could result in fire.Caution
•The vehicle is not designed for refuelling with mixtures of FAME fuel
(biodiesel) over 7% in accordance with DIN 51628. The diesel particle filter
will be damaged if this mixture percentage is exceeded.Economical and environmentally friendly
drivingEconomical and environmen tally friendly drivingFuel consumption, environmental pollution and wear to the engine, brakes
and tyres depends in large part on your driving style. By adopting an econom- ical driving style and anticipating the traffic situation ahead, you can easily
reduce fuel consumption by 10-15%. Some tips on how to help you reduce
pollution while saving money are listed below.
As you drive try to anticipate the traffic situation
A vehicle uses most fuel when accelerating. When you anticipate the situa-
tion, you have to brake less often and, thus, accelerate less. If it is possible,
let the vehicle roll with a gear engaged
, for example, if you see a red light
ahead. The braking effect achieved in this way helps to reduce the wear of
brakes and tyres; emissions and fuel consumption are reduced to zero
(disconnection due to inertia).
Change gear early to save energy
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: Change from first to second gear as quickly as possible. We
recommend that, whenever possible, you change to a higher gear upon
reaching 2,000 rpm.
Avoid driving at high speed
We advise you not to drive at the top speed permitted by the vehicle. Fuel
consumption, exhaust emissions and noise levels all increase very rapidly at
higher speeds. Driving at moderate speeds will help to save fuel.
Avoid idling
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.
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