cooling MERCEDES-BENZ C-CLASS SALOON 2007 User Guide

Thermotronic*
16
9 Setting the airflow manually
You can also set the airflow manually for the
entire vehicle.
X To increase/reduce: press theQor
the Ï button.
The indicator lamp in the Ubutton goes
out. Automatic air distribution remains acti-
vated. Mono function
You can use the mono function to adopt the
settings configured for temperature, air dis-
tribution and airflow on the driver's side for
the front-passenger side and the rear com-
partment .
X To activate :press the zbutton.
The indicator lamp in the zbutton lights
up.
X To deactivate: press thezbutton.
The indicator lamp in the zbutton goes
out. Demisting
i You should only select the demisting
function until the windscreen is clear again.
You can use the following settings to demist
the windscreen, e.g. when it is covered with
frost:
X To switch on :press the ybutton.
The indicator lamp in the ybutton
comes on.
Thermotronic automatically switches to
the following functions:
R Cooling with dehumidification on
R High airflo w
R High temperature
R Air distribution to the windscreen and
front side windows
R Air-recirculation mode off
i You can modify the settings for tempera-
ture, airflow and air distribution. The other
settings of the demisting function are
retained.
X To deactivate: press theybutton.
The indicator lamp in the ybutton goes
off. The previously selected settings come into effect again. Cooling with dehumidifi-
cation remains active.
or
X Press the Ubutton.
The indicator lamp in the ybutton goes
off. The indicator lamp in the Ubutton
is lit. Airflow and air distribution are set to
automatic mode. Windows misted up
Windows misted up on the inside You can use the following settings to demist
the windscreen, e.g. when it is covered with
frost
:
X Activate automatic mode (Y page 168).
If the windows are still misted up:
X Activate the demisting functio n
( Y page 169).
Windscreen misted up on the outsid e X
Switch on the windscreen wipers.
X Close the centre air vents . Cont
rols
* optional
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Thermotronic*
17
0
X
Press the Zbutton repeatedly until the
Y ora setting appears in display
d .
i You should only select this setting until
the windscreen is clear again. Air-recirculation mod
e
You can deactivate the flow of fresh air if
unpleasant odours are entering the vehicle
from outside. No more fresh air will be taken
in and the air inside the vehicle will be recir-
culated. G
Risk of accident
Only switch over to air-recirculation mod e
briefly at low outside temperatures. Other -
wise, the windows could mist up, thus
impairing visibility and endangering your-
self and others. This may obstruct your view
of the traffic situation, thereby causing an
accident.
X To activate :briefly press the ,button.
The indicator lamp in the ,button is lit.
i Air-recirculation mode is activated auto-
matically at high outside temperatures.
When air-recirculation mode is activated automatically, the indicator lamp in
the
, button goes off.
Outside air is added after about 30
minutes.
X To deactivate: press the,button.
The indicator lamp in the ,button is off.
i Air-recirculation mode switches off auto-
matically:
R after approximately five minutes at out -
side temperatures below approximately
7 °C
R after approximately five minutes if th e
cooling with dehumidification function is
deactivated
R after approximately 30 minutes at out -
side temperatures above approximately
5 °C
Air-recirculation mode with conveni-
ence opening/closing feature G
Risk of injury
Make sure that nobody can become trap -
ped between the side window and the door
frame as the side windows are opened and closed. Do not place objects or lean against
the side window when it is being opened or
closed. You or the objects could be drawn
in or become trapped between the side
window and the door frame as the window
moves. If there is a risk of entrapment,
release the ,button. If necessary, press
the switch that stops, opens or closes the
side window in the opposite direction.
Make sure that nobody can become trap-
ped when you open or close the sliding/
tilting sunroof*/panorama sliding sun-
roof*. If there is a risk of entrapment,
release the ,button. If necessary, press
the switch that stops, opens or closes the
sliding/tilting sunroof* or panorama sliding
sunroof* in the opposite direction.
X Convenience closing: press and hold
the , button until the side windows and
the sliding /tilting sunroof*/panorama
sliding sunroof* close.
The indicator lamp in the ,button is lit.
Air-recirculation mode is activated.
X Convenience opening: press and hold
the , button until the side windows and
the sliding /tilting sunroof*/panorama Controls
* optional
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Thermotronic*
17
1
sliding sunroof* move back into their pre-
vious position.
The indicator lamp in the ,button is off.
Air-recirculation mode is deactivated.
i If you open a side window or the sliding/
tilting sunroof* or panorama sliding sun-
roof* manually after closing using the con-
venience closing feature, it will remain in
this position when opened using the con-
venience opening feature. Residual heat/auxiliary ventilation
It is possible to make use of the residual heat
of the engine to continue heating the station-
ary vehicle for up to 30 minutes after the
engine has been switched off. The heating
time depends on the coolant temperature and
on the interior temperature that has been set.
i If you activate residual heat at high tem-
peratures, only the ventilation is activated.
i The blower will run at a low speed regard-
less of the airflow setting.
X Make sure the key is in position 0in the
ignition lock or that it has been removed. X
To activate :press the Tbutton.
The indicator lamp in the Tbutton is lit.
The REST display message in the display is
lit.
X To deactivate: press theTbutton.
The indicator lamp in the Tbutton is off.
The REST display message in the display is
not lit.
i The residual heat/auxiliary ventilation is
automatically deactivated after about 30
minutes, or when:
R the ignition is switched on
R the battery voltage drops
R the coolant temperature is too lo w Cooling with air-dehumidification
G
Risk of accident
If you deactivate the cooling function with
air dehumidification, the vehicle will not be
cooled in warm weather and the air will not
be dehumidified. The windows could mis t
up more quickly. This may prevent you from
observing the traffic conditions, thereby
causing an accident. H
Environmental not
e
The cooling system uses the refrigerant
R134A. This refrigerant does not damage
the earth's ozone layer.
i Condensation may drip from the under-
side of the vehicle when Thermatic is in
cooling mode.
Cooling with dehumidification is operational
when the engine is running, and cools accord -
ing to the interior temperature selected. The
air inside the vehicle is also dried, thereby
preventing the windows from misting up.
X To activate :press the œbutton.
The indicator lamp in the œbutton is lit.
The cooling with dehumidification function
is activated. Controls
* optional
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Thermotronic*
17
2
X
To deactivate: press theœbutton.
The indicator lamp in the œbutton is off.
The cooling with dehumidification function
has a delayed switch-off feature. Rear-compartment air conditioning
The rear-compartment air conditioning can
be operated using the rear-compartment con -
trol panel. You can set the temperature and
the airflow .
The rear-compartment control panel is loca-
ted in the rear centre console. Rear-compartment control panel Thermotronic
1 Thumbwheel for rear-compartment air
vents
2 Rear-compartment air vent, right
3 Q ÏTo increase/reduce the airflow 4
Display
5 $% To increase/reduce the tem-
perature
6 Rear-compartment air vent, lef t
Adjusting the rear-compartment air
vent s X
To open or close: turn thumbwheel1
upwards or downwards .
Setting the temperature X
To increase/reduce: press the$or
the % button. Only change the temper -
ature setting in small increments. Start at
22 °C.
The temperature set is shown in display
4 .
i The rear-compartment air conditioning
does not cool the air if the cooling function
has been deactivated on the front control
panel.
Setting the airflow You can set the airflow for the entire rear
compartment.X
To increase/reduce: press theQor
the Ï button. Controls
* optional
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Engine compartment
209
Topping up the engine oil
Illustration: vehicle with a petrol engin
e
1 Cove r Example illustration of a vehicle with a diese
l
engine
1 Cove r X
Unscrew cap 1and remove it.
X Top up by the amount of oil required.
! Do not add too much oil. If too much oil
is added, there is a risk of damage to the
engine or the catalytic converter.
X Screw cap 1onto the filler neck. H
Environmental not
e
When topping up the oil, take care not to
spill any. Oil must not be allowed to escape
into the soil or waterways. You would oth-
erwise be damaging the environment . Coolan
t G
Risk of injury
The cooling system is pressurised. There-
fore, only unscrew the cap once the engine
has cooled down. This means the coolant
temperature gauge must display less than
70 °C. You could otherwise be scalded by
escaping hot coolant.
Coolant consists of water and antifreeze/cor -
rosion inhibitor. Only check the coolant leve l
when the vehicle is on a level surface and th e
engine has cooled down. Checking the coolant level The expansion tank is located in the engin
e
compartment on the right-hand side of the
vehicle . 1
Cove r
2 Expansion tank
3 Marker bar
X Slowly turn cap 1by half a turn anti-clock -
wise to allow excess pressure to escape.
X Turn cap 1further anti-clockwise and
remove it.
There is sufficient coolant in expansion
tank 2if the coolant is level with marker
bar 3in the filler neck when cold or
approximately 1.5 cm higher when hot .
X Top up the coolant if necessary. Operation
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Troubleshooting
27
7 Problem Possible cause/consequence Suggested solutions
The indicator lamp in the
2
button on the Thermatic/
Thermotronic *control panel is on
or flashes when you press the
button. The cooling system can-
not be switched on. The cooling system is losing
refrigerant
. X
Visit a qualified specialist workshop. The rear-window heating has
switched itself off prematurely or
cannot be switched on. There is insufficient voltage
because too many consumers are
switched on. X
Switch off consumers that are not required, e.g. reading lamps ,
interior lighting, etc .
The rear-window heating will automatically switch back on as soon
as there is sufficient voltage again. Vehicles with automatic child
seat recognition on the front-
passenger seat*:
The
5/ indicator lamp on
the centre console is lit. A special Mercedes-Benz child
seat with automatic child seat
recognition has been fitted to the
front-passenger seat. The front-
passenger airbag has therefore
been disabled. Practical advice
* optional
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Trailer coupling*
35
8 Trailer coupling
* Mounting dimensions
G
Risk of accident
Only have a trailer tow hitch retrofitted at a
qualified specialist workshop which has the
necessary specialist knowledge and tools
to carry out the work required. Mercedes-
Benz recommends that you use a
Mercedes-Benz Service Centre for this pur-
pose. In particular, work relevant to safety
or on safety-related systems must be car-
ried out at a qualified specialist workshop.
! If you have a trailer tow hitch retrofitted,
changes to the cooling system may be nec-
essary, depending on the vehicle type.
If you have a trailer tow hitch retrofitted,
observe the anchorage points on the chas-
sis frame. Saloon
Anchorage points for the trailer tow hitch
1
Anchorage points
2 Overhang dimension
3 Rear axle centre lin e
For trailer tow hitches fitted at the factory, the
overhang dimension is 1,151.3 mm. Estate
Anchorage points for the trailer tow hitch
1
Anchorage points
2 Overhang dimension
3 Rear axle centre lin e
For trailer tow hitches fitted at the factory, the
overhang dimension is 1,178.8 mm. Technical data
* optional
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Service products and capacities
369Coolant
The coolant is a mixture of water and anti-
freeze/corrosion inhibitor. It performs the
following tasks:
R Anti-corrosion protection
R Antifreeze protection
R Raising the boiling poin t
i When the vehicle is first delivered, it is
topped up with a coolant that will ensure
adequate antifreeze and corrosion protec -
tion.
! Only top up with coolant that has been
premixed with the desired quantity of anti -
freeze protection. You could otherwise
damage the engine.
There is more information about coolant
and topping it up on Mercedes-Benz Spec-
ifications for Service Products Sheet
310.1.
! Always use a suitable coolant mixture,
even in countries where high temperatures
prevail.
Otherwise, the cooling system will not be
sufficiently protected from corrosion, and
the boiling point will be too low .If antifreeze/corrosion inhibitor is present in
the correct concentration, the boiling point of
the coolant will be around 130 °C.
The antifreeze/corrosion inhibitor concentra-
tion in the cooling system should:
R
be at least 50%. This will protect the coolin g
system against freezing down to around
-37 °C.
R not exceed 55% (antifreeze protection
down to -45 °C), otherwise heat will not be
effectively dissipated .
If the vehicle is losing coolant, top it up with
equal amounts of water and antifreeze/cor-
rosion inhibitor. Mercedes-Benz recom-
mends an antifreeze/corrosion inhibitor
which has been approved for Mercedes-Benz.
! The cooling system contains a lifetime
supply which must be renewed after 15
years, or after 250, 000 km at the latest.
Have the renewal confirmed in the Service
Booklet.
The warranty is only valid if you top up with
an antifreeze/corrosion inhibitor which
has been approved by Mercedes-Benz. Technical data
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Service products and capacities
370
Capacities The following values indicate the total cooling system capacities.
C 180 KOMPRESSOR
C 200 KOMPRESSOR C 230
C 280
C 350
C 280 4MATIC
C 350 4MATIC C 200 CDI
C 220 CDI C 320 CDI
C 320 CDI 4MATIC Coolant 3.8
l 4.8
l 6.0
l 5.7
l Amount of antifreeze/corrosion inhibitor required for antifreeze protection
Down to -37 °C
(approximately 50%) 1.9
l 2.4
l 3.0
l 2.9
l Down to -45 °C
(approximately 55%) 2.1
l 2.7
l 3.5
l 3.1
l Techni
cal data
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