2005 Seat Leon 5D cooling

Cockpit
58display
3). Stop the car and switch off the engine. Check the coolant level
⇒ page 201 ⇒ .
E
ven if the coolant level is correct do not continue driving. You should obtain
technical assistance.WARNING
When working in the engine compartment, always bear in mind the safety
wa rnings ⇒ page 193.
Caution
Accessories in front of the air inlet reduce the cooling effect of the coolant. At
high outside temperatures and high engine loads, there is a risk of the
engine overheating.Rev counter
The rev. counter displays the engine speed in revolutions per
minute.The start of the red zone on the dial ⇒page 56, fig. 32 indicates the
maximum engine speed which may be used briefly when the engine is warm
and after it has been run in properly. However, it is advisable to change up a
gear or move the selector lever to D (or l ift your foot off the accelerator) before
the needle reaches the red zone.
Caution
The rev counter needle must never enter the red zone on the scale. Risk of
engine damage.
For the sake of the environment
Changing up a gear early will help you to save fuel and minimise engine
noise.Setting the digital clock*
The digital clock is located in the instrument panel display.– Turn the setting knob ⇒page 56, fig. 32 anti-clockwise to
the stop to set the hour. If the kn ob is turned briefly anti-clock-
wise the clock will advance one hour further.
– Turn the setting knob clockwise to the limit stop to set the minutes. If the knob is turned briefly clockwise the clock will
advance one minute further.
3)Depending on the model version
A4
A5
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Heating, ventilation and air conditioning139
Safety First
Operating instructions
Tips and Maintenance
Te c h n i c a l D a t a
Note
Please observe the general notes ⇒page 145.Heating and cooling the interiorHeating of the vehicle interior
– Turn the temperature selector ⇒fig. 105 clockwise to select
the required temperature.
– Turn the blower switch to one of the settings 1-4.
– Use the air distribution control to guide the flow of air in the required direction: (to the windscreen), (to the upper
body), (to the foot well) and (to the windscreen and to the
foot well). Cooling the passenger compartment
– Switch on the air conditioner using the button
⇒page 138,
fig. 104 .
– Turn the temperature selector anti-clockwise until the desired cooling output is reached.
– Turn the blower switch to one of the settings 1-4.
Fig. 105 On the dash panel: Climatic controls
A1
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
AC
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Heating, ventilation and air conditioning141
Safety First
Operating instructions
Tips and Maintenance
Te c h n i c a l D a t a
Air recirculation mode
⇒page 140, fig. 106 prevents strong odours in
the outside air from entering the vehicle interior, for example when passing
through a tunnel or in queuing traffic.
With low ambient temperatures, the air recirculation increases the effective-
ness of the heating system by heating the air inside the passenger compart-
ment rather than the ambient air.
With high ambient temperatures, the air recirculation increases the effective-
ness of the air cooling system by cooling the air inside the passenger
compartment rather than the ambient air. For reasons of safety, air recirculation is
not possible when the control for air
distribution is set to the windscreen setting .
WARNING
In air recirculation mode, no ambient air enters the vehicle interior. If the
air conditioning system is switched off, the windows can quickly mist over.
Therefore, you should never leave the air recirculation mode switched on
for longer periods, as this increases the risk of an accident.
2C-Climatronic*Control switches
The controls allow separate adjustment of air conditioning settings for the left and right.

Fig. 107 On the dash panel: 2C Climatronic controls
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Heating, ventilation and air conditioning
144Temperature
There are separate temperature selectors for the left and right sides of the
vehicle interior. The selected temperatur e is displayed above the selector. It
is possible to select interior temper atures from +16° C (61° F) to +29.5° C
(86° F). These are approximate temperat ures and the actual temperature may
be slightly higher or lower depending on the ambient conditions.
If a temperature below 16° C (61° F) is selected, the display switches to LO. In
this setting the system runs at maximum cooling output and the temperature
is not regulated.
If a temperature above 29.5 °C (86 °F) is selected the display switches to HI.
In this setting the system runs at maximum heating output and the tempera-
ture is not regulated.
Blower
The air flow may be adjusted freely using the control . Always have the
blower running at a low setting to ensure a constant flow of fresh air into the
vehicle. Pushing the button
 to the minimum -1, turns the Climatronic off.
Air distribution
The air distribution is adjusted using the buttons , and . It is also
possible to open and close some of the air vents separately.
Switching the air conditioning system on and off
Pressing the button switches off th e air conditioning system to save
fuel. The temperature continues to be regulated. The set temperature can
then only be reached if it is higher than the ambient temperature.
Air recirculation mode
Air recirculation mode prevents fumes or unpleasant smells
from entering the vehicle.– Press the button ⇒page 143, fig. 108 to switch air recir-
culation mode on or off. It is sw itched on if the following symbol
appears in the display

.
Air recirculation mode pr events strong odours in the ambient air from
entering the vehicle interior, for example when passing through a tunnel or in
queuing traffic.
With low ambient temperatures, the air recirculation increases the effective-
ness of the heating system by heating the air inside the passenger compart-
ment rather than the ambient air.
With high ambient temperatures, the ai r recirculation increases the effective-
ness of the air conditioning system by cooling the air inside the passenger
compartment rather than the ambient air.
For reasons of safety, air recirculation is not possible when the control for air
distribution is set to the windscreen setting
.
WARNING
In air recirculation mode, no ambient air enters the vehicle interior. If the
air conditioning system is switched off, the windows can quickly mist over.
Therefore, you should never leave the air recirculation mode switched on
for longer periods, as this increases the risk of an accident.
A10
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
ECON

A2
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Heating, ventilation and air conditioning145
Safety First
Operating instructions
Tips and Maintenance
Te c h n i c a l D a t a
General notesThe pollen filter
The pollen filter (a combined particle filter and active carbon filter) serves
as a barrier against impurities in the ambient air, including dust and pollen.
For the air conditioning system to work with maximum efficiency, the pollen
filter must be replaced at the intervals specified in the Service Schedule.
If the filter loses efficiency prematurely due to use in areas with very high
levels of air pollution, the pollen filter must be changed more frequently than
stated in the Service Schedule.
Caution
•
If you suspect that the air conditioner is damaged, switch off the air condi-
tioner with button to prevent further damage and have it checked by a
qualified workshop.
•
Repairs to the air conditioning system require specialist knowledge and
special tools. Therefore, we recommend that you take the vehicle to a quali-
fied workshop should problems occur.Note
•
If the humidity and temperature outside the vehicle are high, condensa-
tion can drip off the evaporator in the cooling system and form a pool under-
neath the vehicle, this is completely normal and there is no need to suspect
a leak.
•
Keep the air intake slots in front of the windscreen free of snow, ice and
leaves to ensure heating and cooling is not impaired, and to prevent the
windows misting over.
•
The air from the vents flows through the passenger compartment and is
extracted by slots designed for this purpose. Do not cover these slots with
articles of clothing or other objects.
•
The air conditioning system operates most effectively with the windows
and the sliding/tilting roof* closed. However, if the sun has heated up the
vehicle, the air inside can be cooled more quickly by opening the windows for
a short period.
•
Do not smoke while air recirculation mode is on, as smoke drawn into the
air conditioning system leaves a residue on the evaporator, producing a
permanent unpleasant odour.
ECON
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Accessories, parts replacement and modifications189
Safety First
Operating instructions
Tips and Maintenance
Te c h n i c a l D a t a
If a towing bracket is to be fitted after the vehicle is purchased, this must be
completed according to the instructions of the towing bracket manufacturer.
The attachment points for the towing bracket are underneath the vehicle.
The distance between the centre of th
e ball coupling and the ground should
never be lower than the measurement indicated when the vehicle is fully
loaded including the maximum resting weight.
Measurement for securin g the towing bracket:
65 mm (minimum)
350 mm to 420 mm (fully laden vehicle)
357 mm
569 mm
875 mm
1,040 mm
Fitting a towing bracket
•
Driving with a trailer implies additional work for the vehicle. For this
reason, before fitting a trailer system, refe r to the Technical Service to find out
if the vehicle cooling system should be adjusted.
•
Observe the legal requirements in yo ur country (e.g. the fitting of a sepa-
rate warning lamp).
•
Certain vehicle componen ts, e.g. the rear bumper must be removed and
reinstalled. The towing bracket securi ng bolts must be tightened using a
torque wrench, and an electrical sock et must be used to connect to the
vehicle's electrical system. This requires specialist knowledge and tools.
•
The figures in the illustration show the dimensions and attachment points
which must be observed if you are retrofitting a towing bracket.
WARNING
Towing brackets should be fitted by specialists.
•
If the towing bracket is incorrectly installed, there is serious danger of
an accident.
•
For your own safety, please observe the instructions provided by the
manufacturer of the towing bracket.Caution
•
If the electrical socket is incorrectly installed, this could cause damage to
the vehicle's electrical system.
AA
ABACADAEAFAG
WARNING (continued)
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Checking and refilling levels
194
WARNING
All work on the engine or in the engine compartment, e.g. checking and
refilling fluids, involves the danger of injury and scalding as well as the risk
of accident or fire.•
Never open the bonnet if you see steam, smoke or coolant escaping
from the engine compartment. Otherwise, there is a risk of sustaining
burns. Wait until no more steam or coolant is emitted, then allow the
engine to cool before carefully opening the bonnet.
•
Switch off the engine and remove the key from the ignition.
•
Apply the handbrake and move the gea r stick to neutral or selector
lever to position P.
•
Keep children away from the vehicle.
•
Never touch hot engine parts. There is a risk of burns.
•
Never spill liquids on a hot engine or on a hot exhaust gas system. This
is a fire hazard.
•
Avoid causing short-circuits in the electrical system, particularly at the
points where the jump leads are attached ⇒page 241. The battery could
explode.
•
Never touch the radiator fan. It is temperature controlled and could
start automatically, even when the engine has been switched off and the
key removed from the ignition!
•
Do not unscrew the cap on the expansion tank when the engine is hot.
If the coolant is hot, the cooling system will be pressurised!
•
Protect face, hands and arms by covering the cap with a large, thick
cloth to protect against escaping coolant and steam.
•
Always make sure you have not left any objects, such as cleaning cloths
and tools, in the engine compartment.
•
If you have to work underneath the vehicle, you must use suitable
stands additionally to support the vehicl e, there is a risk of accident! A
hydraulic jack is insufficient for securing the vehicle and there is a risk of
injury.
•
If any work has to be performed when the engine is started or with the
engine running, there is an additional, potentially fatal, safety risk from the
rotating parts, such as the drive belt s, alternator, radiator fan, etc., and
from the high-voltage ignition system. You should also observe the
following points:
−Never touch the electrical wiring of the ignition system.
− Ensure that jewellery, loose clothing and long hair do not get
trapped in rotating engine parts. Danger of death. Before starting any
work remove jewellery, tie back and cover hair, and wear tight-fitting
clothes.
− Always think carefully about pressing the accelerator if a gear is
engaged in either an automatic or manual gearbox. The vehicle could
move, even if the handbrake is applied. Danger of death.
•
If work has to be carried out on the fuel system or on electrical compo-
nents, you must observe the following safety notes in addition to the above
warnings:
−Always disconnect the battery. The vehicle must be unlocked when
this is done, otherwise the alarm will be triggered.
− Do not smoke.
− Never work near naked flames.
− Always have a fire extinguisher on hand.Caution
When changing or topping up service fluids, make absolutely certain that you
fill the fluids into the correct reservoirs. Failure to observe this point will result
in serious malfunctions and engine damage!
WARNING (continued)
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Checking and refilling levels201
Safety First
Operating instructions
Tips and Maintenance
Te c h n i c a l D a t a
CoolantCoolant specifications
Coolant is a mixture of water and at least 40% coolant addi-
tive.The cooling system must be filled with a mixture of water and at least 40 % of
our coolant additive G 12+ or an additive with the specification TT-VW 774 F
(it is dyed purple). This mixture gives the necessary frost protection down to
-25
°C and protects the alloy parts of the cooling system against corrosion. It
also prevents scaling and raises the boiling point of the coolant.
The concentration of coolant must always be at least 40% - even if frost
protection is not required.
If greater frost protection is required in very cold climates, the proportion of
the antifreeze additive G 12+ can be increased. However, the percentage of
coolant additives should not exceed 60%, as this would reduce the frost
protection. It would also reduce the cooling effect. A mixture with 60%
coolant additive will give frost protection to approx. -40
°C.
WARNING
•
The coolant additive is toxic. This represents a toxic danger. Always
keep the coolant additive in the original container which should be stored
out of the reach of children. The same applies to coolant which you have
drained off.
•
The coolant additive G 12+ must be added in sufficient quantities to
provide anti-freeze protection at the coldest ambient temperatures that
can be expected. At extremely cold ambient temperatures, the coolant
could freeze, causing the vehicle to br eakdown. As the heater would also
not work in this situation, there is a risk of suffering exposure!
Caution
•
Other additives may give considerably inferior corrosion protection. The
resulting corrosion in the cooling system can lead to a loss of coolant,
causing serious damage to the engine.
•
The coolant additive G 12+ (purple) can be mixed with the additive G 12
(red) or G 11. Never mix G 12 (red colour) with G 11.
Checking the coolant level and topping up

The correct coolant level is important for fault-free func-
tioning of the engine cooling system.Before opening the bonnet, read and observe the warnings ⇒ in
“Safety instructions on working in the engine compartment” on
page 193 .
Fig. 138 In the engine
compartment: Coolant
expansion tank cap
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