Page 124 of 248
118 Climate control
Picture no: 14151s.tif
Heating the foot well
zSet the temperature switch in the right-
hand zone.
z Switch on fan.
z Set air distribution switch to K.
Picture no: 16481s.tif
Demisting and defrosting windows
Misted or icy windows, e. g. due to damp
weather, damp clothing or low outside
temperatures:
z Turn the temperature switch clockwise as
far as it will go (warm). z
Set fan to 3 or 4 .
z Set air distribution switch to V.
z Switch on heated rear window Ü 3.
z Open side air vents as required and
direct them towards door windows.
z For simultaneous footwell heating, set
air distribution switch to J.
9 Warning
Disregard of the instructions could lead
to misting or icing of the windows and
subsequent accidents due to impaired
visibility.
Page 125 of 248

119
Climate control
Air conditioning system
3
As a supplement to the heating and
ventilation system, the air conditioning
system cools and dehumidifies (dries)
inflowing air.
If cooling or dehumidification is not
desired, switch off cooling in order to save
fuel.
Cooling switches off automatically at low
outside temperatures.
Picture no: 14159s.tif
Cooling n
Only operate with the engine and fan
running. Activate and deactivate with
the nbutton.
When cooling is active (AC compressor) the
air is cooled and dehumid ified. If cooling or
dehumidification is not desired, switch off
cooling in order to save fuel.
Cooling switches off automatically at low
outside temperatures.
When cooling operates, condensation
forms and drips from the underside of the
vehicle.
Picture no: 14158s.tif
Air recirculation system 4
The air recirculation mode of the
ventilation system is activated and
deactivated by pressing the 4 button.
If fumes or unpleasant odours penetrate
from outside: Temporarily switch on air
recirculation system 4.
To increase cooling at high outside
temperatures, switch on the air
recirculation system briefly.
Page 129 of 248

123
Climate control
Picture no: 16496s.tif
Automatic mode
Basic setting for maximum comfort:
zPress AUTO button.
z Open all air vents.
z Switch on AC compressor 3125.
z Preset temperature to 22 C with turn
knob.
The temperature can be set higher or lower
as desired. Switching off the air conditioning
compressor (
ECO appears in display) can
have a detrimental effect on comfort and
safety 3125.
All air vents are actuated automatically in
automatic mode. The air vents should
therefore always be open 3115. Temperature preset
The left rotary knob can be used to set the
temperature to values of between 16 C
and 28 C.
For the sake of comfort, only change the
pre-selected temperature in small steps.
If the temperature setting is less
than 16 C,
LO appears in the air
conditioning display: the climate control
system runs constantly at maximum
cooling power, and the temperature is not
regulated.
If the temperature setting is
above 28 C, HI appears in the air
conditioning display: the climate control
system runs constantly at maximum
heating power, and the temperature is not
regulated.
The temperature settings remain stored
when the ignition is turned off.
Page 133 of 248
127
Climate control
Auxiliary heater Depending on outside temperature and
engine temperature, the passenger
compartment of vehicles with Quickheat 3
electric auxiliary heating is warmed up
more quickly.
Diesel-engined vehicles have a fuel-
powered auxiliary heater 3.
Picture no: 14147s.tif
Air intake The air intakes in front of the windscreen on
the far right and left sides of the engine
compartment must be kept clear to allow
air intake. Remove any leaves, dirt or snow. Air outletDo not cover the air outlets when storing
items in the luggage compartment storage
compartments.
Pollen filter The pollen filter cleans dust, soot, pollen
and spores from the air entering from
outside. The active carbon layer 3
eliminates most odours and noxious
environmental gases from the air.
Page 134 of 248
128 Climate controlRegular operationFor consistently good operation, the air
cooling system 3 must be switched on for
several minutes once per month regardless
of the weather and the time of year.
Operation not possible with the cooling
system switched on and when the outside
temperature is low.
Service For optimal cooling performance, we
recommend that the climate control
system be checked annually, starting three
years after initial vehicle registration.
z Functionality and pressure test,
z Heating functionality,
z Leakage check,
z Check of drive belts,
z Cleaning of condenser and evaporator
drainage,
z Performance check.
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131
Driving and operation
Picture no: 14175s.tif
Selector lever in A/M
Switch between Automatic and Manual
mode.
In manual mode, gears can be selected
manually by moving the selector lever
to
+or
-. The currect gear is indicated in
the transmission display.
If the engine speed is too low the manual
transmission automated will automatically
shift to a lower gear even in Manual mode.
This prevents the engine from stalling. Selector lever in + or -
If a higher gear is selected when the
running speed is too low, or a lower gear
when the speed is too high, the gear
selection will not take place. This prevents
the engine from running at too low or too
high revs.
Gears can be skipped by jogging the
selector lever repeatedly
at short intervals.
When the vehicle is in automatic mode, the
manual transmission automated shifts to
manual mode by moving the selector lever
to position
+ or
-. The correct gear is
indicated on the transmission display.
Selector lever in R
Reverse gear. Engage only when vehicle is
stationary.
Press button on selector lever, select R. The
transmission display shows "R".
If R is selected when the vehicle is in motion,
"R" flashes in the transmission display and
no gear is engaged. Stopping the vehicle
In Automatic or Manual mode, when the
vehicle has stopped first gear (with Winter
mode engaged, second gear) is engaged
automatically and the
clutch released. In R
reverse remains engaged.
If a warning signal sounds when the
driver’s door is opened (foot brake not
depressed), move the selector lever to N
and apply the hand brake.
When stopping on gradients, engage the
hand brake or depress the brake pedal. To
prevent overheating of the clutch, do not
increase engine speed to ensure smooth
idling when in gear.
Switch off engine if stopping for a lengthy
period, e.g. in traffic jams or at level
crossings.
Electronically controlled driving
programmes in automatic mode
z Following a cold start, the operating
temperature program automatically
increases the engine revolutions to bring
the catalytic converter to the required
temperature.
z The adaptive program automatically
selects the gear according to the driving
conditions, e.g. increased load and
gradients.
+
Shift to a higher gear.
-
Shift to a lower gear.
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139
Driving and operation
Fuels, refuellingFuel consumption
The fuel consumption is determined under
specified driving conditions 3224.
Special equipment increases the weight of
the vehicle. As a result, they can increase
fuel consumption and reduce the specified
maximum speed.
For the first few thousand kilometres,
friction between the engine and
transmission components is higher. This
increases fuel consumption. 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 (value in bold
3220). Use of fuel
with too low an octane rating can reduce
engine power and torque and will slightly
increase fuel consumption. Fuel for diesel engines
Only use diesel fuel that complies
with DIN EN 590. The fuel must have low
sulphur content (maximum 50 ppm).
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, re
fuel with diesel fuel
with guaranteed winter properties.
Caution
Use of fuel with too low an octane rating
could lead to uncontrolled combustion
and engine damage.
Page 148 of 248

142 Driving and operation
Picture no: 6448u.tif
Catalytic converter, exhaust
gassesCatalytic converter
The catalytic converter reduces the
amount of harmful substances in the
exhaust gas, such as carbon monoxide
(CO), hydrocarbons, (CH) and nitrous
oxide (NO
x). Fuel grades other than those listed on
pages 139, 220 (e. g. LRP = Lead
Replacement Petrol or leaded fuel) could
damage the catalytic converter or
electronic components.
z
In the event of misfiring, uneven engine
running, a clear 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 can be continued for
a short period, keeping vehicle speed
and engine speed low.
This does not apply when the Electronic
Stability Program (ESP®
Plus
3) kicks in
3 146.
z If unburnt fuel enters the catalytic
converter of a petrol engine, this may
result in overheating and irreparable
damage to the catalytic converter.
You should therefore avoid
unnecessarily long use of the starter
when starting off, running the tank dry
and starting the engine by pushing or
towing.
Picture no: 17875s.tif
Controlling exhaust emission
Design measures, primarily in the fuel
injection system and ignition system zones
in combination with the catalytic converter,
the amount of hazardous substances in the
exhaust emissions, such as carbon
monoxide (CO), hydrocarbons (CH) and
nitrogen oxides (NO
x), are reduced to a
minimum.
Caution
Damage to the catalytic converter or the
vehicle may result if the following points
are not observed.