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Climate control
123
Individual menu items are marked by
turning the centre control and
selected by pressing it.
To
exit a menu, turn the centre control
until Return or Main appear and
select.
Air distribution
Turn the centre control. The Air
distribut. menu is activated, showing
the possible air distribution settings:
Top = to windscreen and front door windows.
Centre = to vehicle occupants.
Bottom = to foot well.
The Air distribut. menu can also be
called up via the Climate menu.
Return to automatic air distribution:
Deactivate corresponding setting or
press button AUTO. Cooling
In the Climate menu, select menu
item AC and activate or deactivate
cooling.
The air condition system cools and
dehumidifies (dries) when outside
temperature
is above a specific level.
Therefore condensation may form
and drip from under the vehicle.
If no cooling or drying is required,
switch the cooling system off to save
fuel, Eco appears in the display. Fan regulation in automatic
mode
Fan
regulation in automatic mode can
be adapted.
Select menu item Automatic blower
from the Climate menu and select the
desired fan regulation.
Automatic air recirculation The automatic air recirculation
system has an air quality sensor
which can switch automatically to
recirculation.
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124
Climate control
In the Climate menu, select menu
item Auto recirc and activate or
deactivate.
Switch to manual air recirculation as
necessary.
Manual air recirculation mode
The manual air recirculation mode is
operated with the 4 button. 9
Warning The exchange of fresh air is
reduced in air recirculation mode.
In
operation without cooling the air
humidity increases, so the
windows may mist up. The quality
of the passenger compartment air
deteriorates, which may cause the
vehicle occupants to feel drowsy. Air conditioning with the engine
not running
When
ignition is off, the residual heat
or cooling in the system can be used
for climate control in passenger
compartment. Press the AUTO button with the
ignition off. Residual air conditioning
on will appear briefly in the display.
Residual climate control can only
operate
for a limited period of time. To
cancel, press the AUTO button.
Auxiliary heater
Air heater
Quickheat is an electric auxiliary air
heater which warms up the
passenger compartment more
quickly.
Coolant heater
Diesel-engined vehicles have a fuel-
powered auxiliary coolant heater
which warms up the engine coolant
when the engine is running. Air vents
Adjustable air vents
At least one air vent must be open
while
cooling is on in order to prevent
the evaporator from icing up due to
lack of air movement.
Air vents with adjuster wheel To open or close the vent, turn the
adjuster wheel.
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Driving and operating
127
Driving and operating
Driving hints ............................... 127
Starting and operating ...............127
Engine exhaust .......................... 129
Automatic transmission
.............. 131
Manual transmission ..................136
Manual transmission
automated .................................. 136
Brakes ........................................ 140
Ride control systems .................142
Cruise control ............................. 144
Object detection systems ........... 145
Fuel ............................................ 146
Towing ....................................... 149 Driving hints
Control of the vehicle
Never coast with engine not
running
Many
systems will not function in this
situation (e.g. brake servo unit, power
steering). Driving in this manner is
a danger to yourself and others.
Pedals
To ensure the pedal travel is
uninhibited, there must be no mats in
the area of the pedals. Starting and operating
New vehicle running-in
Do not brake unnecessarily hard for
the first few journeys.
During the first drive, smoke may
occur because of wax and oil
evaporating off the exhaust system.
Park the vehicle in the open for
a while after the first drive and avoid
inhaling the fumes.
Fuel
and engine oil consumption may
be higher during the running-in
period.
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Driving and operating
129
Overrun cut-off
The fuel supply is automatically cut off
during overrun, i.e. when the vehicle
is driven with a gear engaged but
accelerator is released.
Parking
■ Do not park the vehicle on an easy flammable surface. The high
temperature of the exhaust system
could ignite the surface.
■ Always apply hand brake without pressing release button. Apply as
firmly as possible on downhill or
uphill slopes. Depress the foot
brake at same time to reduce
operating force.
■ Switch off the engine and ignition. Turn the steering wheel until the
steering wheel lock engages.
■ If the vehicle is on a level surface or uphill slope, engage first gear or set
the selector lever to P before
switching off the ignition. On an
uphill slope, turn the front wheels
away from the kerb. If the vehicle is on a downhill slope,
engage reverse gear or set the
selector
lever to P before switching
off the ignition. Turn the front
wheels towards the kerb.
■ Lock the vehicle and activate the anti-theft locking system and the
anti-theft alarm system. Engine exhaust
9
Danger Engine exhaust gases contain
poisonous carbon monoxide,
which is colourless and odourless
and could be fatal if inhaled.
If exhaust gases enter the interior
of the vehicle, open the windows.
Have the cause of the fault
rectified by a workshop.
Avoid driving with an open load
compartment, otherwise exhaust
gases could enter the vehicle.
Diesel particle filter
The
diesel particle filter system filters
harmful soot particles out of the
exhaust gases. The system includes
a self-cleaning function that runs
automatically during driving. The filter
is cleaned by burning off the soot
particles at high temperature. This
process takes place automatically
under set driving conditions and may
take up to 25 minutes. Fuel
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130
Driving and operating
consumption may be higher during
this period. The emission of smells
and smoke during this process is
normal. Under certain driving conditions, e.g.
short distances, the system cannot
clean itself automatically.
If the filter requires cleaning and
previous driving conditions did not
enable automatic cleaning, control
indicator
!
flashes. Continue driving,
keeping engine speed above 2000
revolutions per minute. Shift down if
necessary. Diesel particle filter
cleaning is then started. Stopping the journey or switching off
the engine during cleaning is not
recommended. Cleaning takes place
quickest at high engine speeds and
loads. The control indicator ! extinguishes
as soon as the self-cleaning
operation is complete.
Catalytic converter
The catalytic converter reduces the
amount of harmful substances in the
exhaust gas.
Caution
Fuel grades other than those listed
on pages
3 146, 3 209 could
damage the catalytic converter or
electronic components.
Unburnt petrol will overheat and
damage the catalytic converter.
Therefore avoid excessive use of
the starter, running the fuel tank
dry and starting the engine by
pushing or towing. In the event of misfiring, uneven
engine
running, a reduction in engine
performance or other unusual
problems, have the cause of the fault
rectified by a workshop as soon as
possible. In an emergency, driving
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146
Driving and operating
The system can also be activated at
low speed by pressing the r button.
An obstacle is indicated by buzzers.
The interval between the buzzers
becomes shorter as the vehicle gets
closer to the obstacle. When the
distance is less than 30 cm, the
buzzer is continuous. 9
Warning Under certain circumstances,
various reflective surfaces on
objects or clothing as well as
external
noise sources may cause
the system to fail to detect
obstacles. Deactivation
Deactivate the system by pressing
the r button.
The system automatically switches
itself off when the vehicle is driven
above a certain speed.
Towing equipment
The system automatically considers
a factory-fitted towing equipment. The rear parking sensors are
deactivated when towing.
Fuel
Fuel for petrol engines
Only
use unleaded fuel that complies
with DIN EN 228.
Fuels with ethanol content greater
than 5% may only be used if the
vehicle has been specifically
developed and approved for these
fuels.
Use fuel with the recommended
octane rating 3 209. Use of fuel with
too low an octane rating can reduce
engine power and torque and slightly
increases fuel consumption. Caution
Use of fuel with too low an octane
rating could lead to uncontrolled
combustion and engine damage.
Fuel for diesel engines
Only use diesel fuel that complies
with
DIN EN 590. The fuel must have
low sulphur content (max. 50 ppm).
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Driving and operating
147
Do not use marine diesel oils, heating
oils or entirely or partially plant-based
diesel fuels, such as rape seed oil or
bio diesel, Aquazole and similar
diesel-water emulsions. Diesel fuels
must not be diluted with fuels for
petrol engines.
The flow and filterability of diesel fuel
are temperature-dependent. When
temperatures are low, refuel with
diesel fuel with guaranteed winter
properties.
Fuel for natural gas
operation
Use natural gas with a methane
content of approx. 78 - 99 %. L-gas
(low) has approx. 78 - 87 % and H-gas
(high) has approx. 87 - 99 %. Biogas
with the same methane content can
also be used if it has been chemically
prepared and desulphurised.
Liquid gas or LPG must not be used. Refuelling
9
Danger Before refuelling, switch off engine
and any external heaters with
combustion chambers (identified
by
sticker on fuel filler flap). Switch
off any mobile phones.
Follow the operating and safety
instructions of the filling station
when refuelling. 9
Danger Fuel is flammable and explosive.
No smoking. No naked flames or
sparks.
If you can smell fuel in your
vehicle, have the cause of this
remedied immediately by
a workshop.
Fuel filler flap is located at right rear
side of vehicle.
The
fuel filler flap can only be opened
if the vehicle is unlocked.
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148
Driving and operating
The fuel filler cap can be retained in
the bracket on the fuel filler flap. Caution
Wipe off any overflowing fuel
immediately.
Natural gas refuelling
When filling with natural gas, remove
the
protective cap from the filler neck. 9
Warning Refuel only with a maximum
output pressure of 250 bar. Use
only temperature compensated
filling stations.
The refuelling procedure must be
completed,
i.e. the filler neck must be
vented. Refit the protective cap.
The capacity of the natural gas tank
depends on outside temperature,
filling pressure and type of refuelling
system.
Terms for "natural gas vehicles"
abroad:
German Erdgasfahrzeuge
English NGVs = Natural Gas Vehicles
French Véhicules au gaz naturel – or – Véhicules GNV
Italian Metano auto
Terms for "natural gas" abroad: German Erdgas
English CNG = Compressed
Natural Gas
French GNV = Gaz Naturel (pour) Véhicules - or -
CGN = carburantgaz
naturel
Italian Metano (per auto)
Fuel filler cap
Only
a genuine fuel filler cap provides
full functionality. Diesel-engined
vehicles have special fuel filler caps.
Fuel consumption - CO 2-
Emissions
The determination of fuel
consumption is regulated by
European directive 80/1268/EEC
(latest edition 2004/3/EC).
The directive is oriented to actual
driving practices: Urban driving is
rated at approx. 1
/3 and extra urban