
It recommended to open the windows or the doors of a vehicle for which the inte-rior has been strongly heated through the effect of direct sunlight in order to al-low the heated air to escape.
The cooling system should not be on if the windows are open.
For the sake of the environment
Pollutant emissions are also reduced when fuel is saved » page 131, Economical
driving and environmental sustainability .
Operational problems
First read and observe the introductory information and safety warn-
ings
on page 106.
If 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.
› One of the fuses has blown. Check the fuse and replace if necessa-
ry » page 253 .
› The cooling system has switched off automatically for a short time because the
coolant temperature of the engine is too hot » page 13.
If you are not able to resolve the operational problem yourself, or if the cooler output has reduced, switch off the cooling system and seek assistance from a
specialist garage.
Heating
Introduction
This chapter contains information on the following subjects:
Control elements
108
Adjusting
109
Recirculated air mode
109
Control elementsFig. 108
Heating: Control elements
First read and observe the introductory information given on page 108.
Functions of the individual controls » Fig. 108 .
Set the temperature (turn to the left to reduce the temperature, turn to the
right to increase the temperature)
Set the blower stage (stage 0: Fan out, stage 6: the highest fan speed)
Set the direction of the air outlet » page 107
Switching the rear window heater on/off » page 64
Open/close the fresh air supply (recirculation) » page 109
WARNINGThe blower should always be on to prevent the windows from misting up.
ABC108Using the system

Air conditioning system (manual air conditioningsystem)
Introduction
This chapter contains information on the following subjects: Control elements
110
adjusting
111
Recirculated air mode
111
The cooling system only operates if the following conditions are met. The cooling system is switched on » page 110, Control elements .
The engine is running.
The outside temperature above approx. +2 °C.
The blower switch is switched on (positions 1-6).
If the desired interior temperature can also be achieved without activating the cooling system, fresh air mode should be selected.
The cooling system is switched off at a high coolant temperature in order to pro-
vide cooling at a high load of the engine.
CAUTION
■ Under certain circumstances, air at a temperature of about 5 °C can flow out of
the vents when the cooling system is switched on.■
Lengthy and uneven distribution of the air flow out of the vents (especially
around the feet) and large differences in temperature, for example, when getting
out of the vehicle, can cause susceptible individuals to catch a cold.
Note
We recommend that you have the air conditioning system cleaned by a specialist
garage once every year.Control elementsFig. 109
Air conditioning: Control elements
First read and observe the introductory information and safety warn- ings
on page 110.
Functions of the individual controls » Fig. 109 .
Set the temperature (turn to the left to reduce the temperature, turn to the
right to increase the temperature)
Set the blower stage (stage 0: Fan out, stage 6: the highest fan speed)
Set the direction of the air outlet » page 107
Depending on equipment:
›
Switching the windscreen heater on/off » page 64
›
Aux. heating on/off » page 116
Control the seat heater on the front left seat » page 76
Switching the cooling system on/off
Switching the rear window heater on/off » page 64
Open/close the fresh air supply (recirculation) » page 111
Control the seat heater on the front right seat » page 76
Note
The warning light in the symbol button
lights after activation, even if not all of
the conditions for the function of the cooling system are met » page 110. By light-
ing up of the warning light in the button, the operational readiness of the cooling system is signalled.
ABC1110Using the system

adjustingFirst read and observe the introductory information and safety warnings
on page 110.
Recommended basic settings of the air conditioning controls.
AdjustmentControl dial settings » Fig. 109 on page 110Button » Fig. 109 on page 110Air outlet vents 4 » Fig. 106
on page 107ABCDefrost/defog windscreen and
side windows a)Desired tempera-
ture4 - 6Automatically
switched on b)Do not switch onOpen and align with the side
windowRapid heatingAs far as it will goto the right4 - 6Switched offBriefly switch onOpeningComfortable heatingDesired tempera-
ture1 - 4
Switched offDo not switch onOpeningRapid coolingTo the left up to
the stopbriefly 6, then 2 - 3ActivatedAutomatically switched
onc)OpeningComfortable coolingDesired tempera-
ture1 - 3
d)ActivatedDo not switch onOpeningFresh air mode – ventilationTo the left up to
the stopDesired position
d)Switched offDo not switch onOpeninga)
We recommend that you do not use this setting in countries with high humidity levels. This can result in heavy cooling of the window glass and the following fogging from outside.
b)
Automatic switch-on can be deactivated by pressing the symbol button
.
c)
The automatic activation can be turned off by pressing the symbol button
.
d)
Warmer air is directed to the footwell than to the upper part of the body.
We recommend that you leave the air outlet vents
3 » Fig. 106 on page 107 in the
open position in all operating modes.
Recirculated air mode
First read and observe the introductory information and safety warn-ings
on page 110.
Recirculated air mode prevents polluted air outside the vehicle from getting into
the vehicle, for example when driving through a tunnel or when standing in a traffic jam.
Switching on/off›Press the symbol button .
The warning light below the button lights up.›
Press the symbol button again.
The warning light below the button goes out.
Recirculated air mode is switched off automatically if the air distribution control
C
» Fig. 109 on page 110 is turned to position . Recirculated air mode can be
switched on again from this position by repeatedly pressing the symbol button
.
111Heating and air-conditioning

WARNINGNever leave recirculated air mode switched on over a longer period of time, as
“stale air” can cause driver and passenger fatigue, reduce attention levels and
also cause the windows to mist up. The risk of having an accident increases.
Switch off recirculated air mode as soon as the windows start to mist up.
Climatronic (automatic air conditioning system)
Introduction
This chapter contains information on the following subjects:
Control elements
112
Automatic mode
113
Switching the cooling system on/off
113
Setting temperature
113
Automatic recirculation mode
114
Controlling blower
114
Defrosting windscreen
115
The Climatronic in automatic mode ensures the best-possible setting of the tem-
perature of the outflowing air, the blower stage and air distribution.
The system also takes sunlight into account, which eliminates the need to alterthe settings manually.
The cooling system only operates if the following conditions are met. The cooling system is switched on » page 112, Control elements .
The engine is running.
The outside temperature above approx. +2 °C.
The cooling system is switched off at a high coolant temperature in order to pro-
vide cooling at a high load of the engine.
Note
We recommend that you have Climatronic cleaned by a specialist garage once ev-
ery year.Control elementsFig. 110
Climatronic: Control elements
First read and observe the introductory information given on page 112.
Functions of the individual controls » Fig. 110 .
Adjust the temperature for the left side or for both sides » page 113
Interior temperature sensor
Adjust the blower speed » page 114
Adjust the temperature for the right side » page 113
Display the temperature setting for the left side
Display the temperature setting for the right side
Depending on equipment:
›
Aux. heating on/off » page 116
›
Switching Climatronic system off
Control the seat heater on the front left seat » page 76
Air flow to the windows
Air flow to the upper body
Air flow in the footwell
Automatic recirculation switch on or off » page 114
Control the seat heater on the front right seat » page 76
Switch the intensive windscreen heater on/off » page 115
Switching the rear window heater on/off » page 64
ABCD123112Using the system

Switching the windscreen heater on/off » page 64
Climatronic set in the Infotainment » Operating instructions for Infotain-
ment
Switch the temperature setting in Dual mode on/off » page 113
Switching automatic mode on » page 113
Switching the cooling system on/off » page 113
Note
Do not stick anything onto or cover the interior temperature sensor 11 » Fig. 110
as this could impair the functioning of the Climatronic.
Automatic mode
First read and observe the introductory information given on page 112.
Automatic mode works in three modes - moderate, medium, and intensive.Setting the individual operating modes » Operating instructions for Infotainment ,
chapter Vehicle settings .
Climatronic is set to the medium setting at the factory.
Recommended setting for all periods of the year
›
Set the desired temperature, we recommend 22 °C.
›
Press the button
» Fig. 110 on page 112.
›
Set the air outlet vents 3 and 4 » Fig. 106 on page 107 so that the air flow is
directed slightly upwards.
After the automatic mode is switched on, Climatronic works in the last selected
mode.
The currently selected mode is displayed in the Infotainment display. Automatic mode can be switched off by pressing one of the buttons for the air
distribution or by increasing/decreasing the blower speed.
Switching the cooling system on/off
First read and observe the introductory information given on page 112.
›
Press the symbol button
.
The warning light in the button lights up.›
Press the symbol button
again.
The warning light in the button goes out.
After the cooling system is switched off, only the ventilation function remains ac-
tive whereby the minimum temperature that can be reached is the outside tem-
perature.
Setting temperature
First read and observe the introductory information given on page 112.
The interior temperature for the left and right side can be set separately or to-
gether.
For both sides
›
Turn the control dial
A
» Fig. 110 on page 112 to the left or right to increase or
decrease the temperature.
The warning light in the symbol button
does not light up.
For the right side
›
Turn the control dial
D
» Fig. 110 on page 112 to the left or right to increase or
decrease the temperature.
The warning light in the symbol button
lights up.
If the warning light in the symbol button
is lit, the temperature for both sides
cannot be set with the control dial
A
. This function can be resumed by pressing
the symbol button
. The warning light in the button goes out.
The interior temperature can be set between +16 ℃ and +29 ℃. The interior tem-
perature is regulated automatically within this range.
If a temperature lower than +16 ℃ is selected, a blue symbol lights up on the cor-
responding control dial.
If a temperature higher than +29 ℃ is selected, a red symbol lights up on the cor-
responding control dial.
At both end positions, Climatronic runs at maximum cooling/heating output and
the temperature is automatically not regulated.
113Heating and air-conditioning

Defrosting windscreenFirst read and observe the introductory information given on page 112.
Switching on/off
›
Press the symbol button » Fig. 110 on page 112.
›
Press the symbol button again or press the symbol button .
More air flows out of the air outlet vents 1 » Fig. 106 on page 107. The tempera-
ture control is controlled automatically.
Auxiliary heating (auxiliary heating and ventilation)
Introduction
This chapter contains information on the following subjects:
Switching on/off
116
Radio remote control
116
Conditions for the functioning of auxiliary heating (Aux. heating and ventilation),
hereinafter referred to only as auxiliary heating (Aux. heating).
The charge state of the vehicle battery is sufficient.
The fuel supply is adequate (the warning icon
is not lit in the display of the
instrument cluster).
Auxiliary ventilation
The auxiliary ventilation enables fresh air to flow into the vehicle interior by
switching off the engine, whereby the interior temperature is effectively de-
creased (e.g. with the vehicle parked in the sun).
Auxiliary heating (parking heating)
The auxiliary heating (parking heating) can be used when stationary, when the engine is switched off to preheat the vehicle and while driving (e.g. during the
heating phase of the engine).
The auxiliary heater (parking heater) functions in connection with the air-condi-
tioning system or Climatronic.
The auxiliary heating (parking heating) also warms up the engine.
The auxiliary heating (parking heating) warms up the coolant by combusting fuel
from the vehicle tank. The coolant heats air flowing into the passenger compart- ment (as long as the blower fan speed B
» Fig. 108 on page 108 or
C
» Fig. 110
on page 112 is not set to zero).
WARNING■ The auxiliary heater (independent vehicle heater) must never be operated in
closed rooms (e.g. garages) – risk of poisoning!■
The auxiliary heating (parking heating) must not be running during refuelling
– risk of fire.
■
The exhaust pipe of the auxiliary heating is located underneath the vehicle.
Therefore, if you wish to operate the auxiliary heating (parking heating), do
not park the vehicle in such a way that the exhaust gases can come into con-
tact with highly flammable materials (e.g. dry grass) or easily inflammable sub-
stances (e.g. spilt fuel) – risk of fire.
CAUTION
■ The running auxiliary heating (parking heating) consumes fuel from the vehicle
tank and automatically controls the filling level. If only a low quantity of fuel is
present in the fuel tank, the auxiliary heater switches itself off.■
The exhaust pipe of the auxiliary heating, which is located underneath the vehi-
cle, must not be clogged up and the exhaust flow must not be blocked.
■
If the auxiliary heating 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 kilometres in order to recharge the vehicle battery.
Note
■ The auxiliary heating (aux. heating) switches on the blower B » Fig. 108 on
page 108 or C » Fig. 110 on page 112 only 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.
■
The air inlet in front of the windscreen must be free of e.g. ice, snow or leaves
to ensure that the auxiliary heating and cooling system operates properly.
■
So that warm air can flow into the vehicle interior after switching on the auxili-
ary heating, you must maintain the comfort temperature normally selected by
you, leave the fan switched on and leave the air outlet vents in an open position.
It is recommended to put the air flow in the position or .
115Heating and air-conditioning

CAUTION■Just filling the tank once with diesel fuel that does not comply with the stand-
ard, can cause severe damage to parts of the engine, the fuel and exhaust sys-
tem!■
If a different fuel other than diesel fuel, which complies to the above mentioned
standards (e.g. petrol) is used by mistake do not start the engine or switch on the
ignition! Extensive damage to engine parts can occur! We recommend that you
have the fuel system cleaned by a specialist garage.
■
Water which has collected in the fuel filter can cause engine faults.
CAUTION
■ Your vehicle cannot be operated with biofuel RME, therefore this fuel must not
be refuelled and driven. The use of biofuel RME can cause considerable damage
to parts of the engine or fuel system.■
Do not mix any fuel additives, so-called “flow improvers” (petrol and similar
agents) into the diesel. This can result in considerable damage to parts of the en-
gine or the exhaust system.
Engine compartment
Introduction
This chapter contains information on the following subjects:
Opening and closing the bonnet
217
Engine compartment overview
218
Radiator fan
218
Windscreen washer system
218WARNINGWhen working in the engine compartment, injuries, scolding, accident or fire
hazards may arise. For this reason, it is essential to comply with the warning
instructions stated below and with the general applicable rules of safety. The
engine compartment of your car is a hazardous area!WARNINGBefore beginning work in the engine compartment, please read the following
advice.■
Turn off the engine and withdraw the ignition key.
■
Firmly apply the handbrake.
■
If the vehicle is fitted with a manual gearbox, move the gearshift lever into
Neutral, or if the vehicle is fitted with an automatic gearbox, move the selec-
tor lever into position P.
■
Allow the engine to cool.
■
Never open the bonnet if you can see steam or coolant flowing out of the
engine compartment – risk of scalding! Wait until the steam or coolant has
stopped escaping.
WARNINGWhile working in the engine compartment, please read the following advice.■Keep children clear of the engine compartment.■
Never touch the radiator fan while the engine is still warm. The fan might
suddenly start running!
■
Do not touch any hot engine parts – risk of burns!
■
The coolant additive and thus all of the coolant is harmful to your health.
■
Avoid contact with the coolant.
■
Coolant vapours are harmful to health.
■
Never open the end cover of the coolant expansion reservoir while the en-
gine is still warm. The cooling system is pressurized!
■
When opening the end cover of the coolant expansion reservoir, cover it
with a cloth to protect your face, hands and arms from hot steam or hot cool-
ant.
■
If any coolant splashes into your eyes, immediately rinse out your eyes with
clear water and contact a doctor as soon as possible.
■
Always safely store the coolant additive in its original container out of the
reach of children – risk of poisoning!
■
If coolant is swallowed, consult a doctor immediately.
■
Do not leave any items (e.g. cloths or tools) in the engine compartment.
■
Never spill fluids on the hot engine. Such fluids (e.g. the antifreeze con-
tained in the coolant) may ignite!
215Inspecting and replenishing

ReplenishingFirst read and observe the introductory information and safety warn-
ings
on page 219.
›
Check the oil level » page 220.
›
Unscrew the cap of the engine oil filler opening » Fig. 182 on page 218.
›
Replenish the oil in portions of 0.5 litres in accordance with the correct specifi-
cations » page 219 .
›
Check the oil level » page 220.
›
Carefully screw on the oil filler opening cap and push the dipstick in fully.
Changing
First read and observe the introductory information and safety warn-ings
on page 219.
The engine oil must be changed according to prescribed service inter-vals » page 198 or according to the service interval display » page 33.
Coolant
Introduction
This chapter contains information on the following subjects:
Capacity
222
Checking the coolant level
222
Replenishing
222
The coolant consists of water with a concentration of coolant additive. This mix-
ture guarantees antifreeze protection, protects the cooling/heater system
against corrosion and prevents the formation of scale.
Vehicles exported to countries with a mild climate are already factory-filled with
a coolant which offers antifreeze protection down to about -25 ℃. In these coun-
tries the concentration of coolant additive should be at least 40 %.
Vehicles exported to countries with a cold climate are already factory-filled with a
coolant which offers antifreeze protection down to about -35 °C. In these coun-
tries the concentration of coolant additive should be at least 50 %.
If a higher concentration of antifreeze is required for climatic reasons, the amount
of coolant additive can only be increased up to a maximum of 60 % (antifreeze
protection down to approx. -40 °C).
When refilling, only use antifreeze with the name specified on the coolant expan-
sion tank » Fig. 185 on page 222.WARNING■
The engine compartment of your car is a hazardous area. While working in
the engine compartment, be sure to observe the following warn- ings » page 215 .■
Do not continue your journey, if for some reason it is not possible to top
up the coolant under the prevailing conditions! Switch off the engine and seek
assistance from a specialist garage.
CAUTION
■ The amount of coolant additive in the coolant must never be allowed to be less
than 40 %.■
Over 60 % of coolant additive in the coolant reduces the antifreeze protection
and coolant effectiveness.
■
A coolant additive that does not comply with the correct specifications can sig-
nificantly reduce the corrosion protection.
■
Any faults resulting from corrosion may cause a loss of coolant and can conse-
quently result in major engine damage!
■
Do not fill the coolant above the mark
A
» Fig. 185 on page 222.
■
If a fault causes the engine to overheat, we recommend visiting a specialist ga-
rage, as otherwise serious engine damage may occur.
221Inspecting and replenishing