2009 Seat Leon 5D engine coolant

Heating, Ventilation and Air conditioning147
Safety First
Controls and equipment
Practical tips
Technical Data
– 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).Heating
Maximum heat output, which is needed to defrost the windows quickly, is
only available when the engine has reached its operating temperature.
Air conditioner
When the air conditioning system is switched on, not only the temperature,
but also the air humidity in the vehicle interior is reduced. This improves comfort for the vehicle occupants and prevents misting of the windows when
the ambient air humidity is high.
If the air conditioning system cannot be switched on this may be caused by
the following reasons:
•The engine may not be running.•The blower is switched off.•The outside temperature is below +3°C.•The air conditioning system compressor has been temporarily switched
off because the engine coolant temperature is too high.•The air conditioning fuse is faulty.•Another fault in the vehicle. Have the air conditioning checked by a qual-
ified workshop.
Air recirculation mode
Air recirculation mode prevents fumes or unpleasant smells from coming from the outside.





Fig. 110 On the dash panel: Climatic controls
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Heating, Ventilation and Air conditioning
154Air conditioner
When the air conditioning system is switched on, not only the temperature,
but also the air humidity in the vehicle interior is reduced. This improves
comfort for the vehicle occupants and prevents misting of the windows when
the ambient air humidity is high.
If the air conditioning system cannot be switched on this may be caused by
the following reasons:•The engine is not running.•The button is disconnected.•The outside temperature is below +3°C.•The air conditioning system compressor has been temporarily switched
off because the engine coolant temperature is too high.•The air conditioning fuse is faulty.•Another fault in the vehicle. Have the air conditioning checked by a qual-
ified workshop.Caution
•If you suspect that the air conditioning is damaged, switch it off with the 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 you to take the vehicle to a qualified
workshop.Note
•If the humidity and temperature outside the vehicle are high, condensa-
tion can drip off the evaporator in the cooling system and so forming a puddle
underneath 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 are not impaired, and to prevent the
windows from misting over.•The air from the vents flows through the passenger compartment and is
extracted by slots designed for this purpose. Therefore, do not cover these
slots with items of clothing or other objects.•The air conditioning system operates most effectively with the windows
and the sliding/tilting roof* closed. However, if the vehicle has been over-
heated by sun, the air inside can be cooled quicklier by opening the windows
for a short time.•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.•It is advisable to connect the air conditioning at least once a month, to
lubricate the system gaskets and prevent leaks. If a decrease in the cooling
capacity is detected, an Authorised Service Centre should be consulted to
check the system.
AC
AC
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Driving161
Safety First
Controls and equipment
Practical tips
Technical Data
Driving with LPG*
switch.
Warning light OFF – Running on petrol
Warning light ON – Running on LPG
Your SEAT vehicle has a bivalent engine able to run on either LPG or petrol.
The LPG tank ⇒page 210, “Refuelling with LPG” is in the spare wheel well
⇒ .
It is possible to change from LPG to petrol while the engine is running, even
if the vehicle is moving, by pressing the button ⇒fig. 119 . The
selected operating mode is shown by the lights OFF (running on petrol)
and ON (running on LPG).
Starting the engine
The engine is always started with petrol, even when LPG was being used
when it was switched off. Automatic switch from petrol to LPG
After checking, the system automatically switches from petrol to LPG
provided the following conditions are met:
•There is enough LPG in the tank.•The temperature of the vehicle coolant is above 30°C.•Engine speed while driving is above 1200 rpm.•The button is pressed and the warning light
ON is flashing or
the engine was using LPG when it was switched off.
When these conditions are met, the system switches to LPG mode and the ON
lamp is lit .
Automatic switch from LPG to petrol
The system automatically switches from LPG to petrol in the following cases:•When the engine is started.•If the LPG tank is empty.
Fig. 119 Centre console: gas system control warning
lights and switch.
A1
GAS
A2A3
GAS
A1
A2
A3
GAS
A1
A3
A3
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Driving
162•If there is a fault in the LPG system.•At very low temperatures below minus 10°C.
Manual switch from petrol to LPG
Press the GAS button to switch modes. When the necessary conditions are
met, the system switches to LPG mode and the ON lamp is lit. If the ON
lamp flashes, the following conditions have not been met:•There is enough LPG in the tank.•The temperature of the vehicle coolant is above 30°C.•Engine speed while driving is above 1200 rpm.
When these conditions are met, the system switches to LPG mode and the ON
lamp is lit .
Manual switch from LPG to petrol
Press the button to switch modes. When the OFF lamp is lit, the
vehicle is running on petrol.
Running on petrol
Run the engine with petrol for short journeys at regular intervals to avoid
problems in the petrol system.WARNING
LPG is a highly explosive and inflammable substance. It may cause severe
burns and other injury.•Due care must be taken to avoid any risk of fire or explosion.•When parking the vehicle in a closed area (for example in a garage),
make sure that there is adequate ventilation, either natural or mechanical,
to neutralise the LPG in the event of a leak.
Note
•If frequent short journeys are made, especially when the outside temper-
ature is low, the vehicle will tend to run on petrol more often than on LPG.
Therefore, the petrol tank may empty before the LPG tank.Start-Stop function*Description and operationThe Start-Stop function stops the engine when the vehicle is
stopped and starts it automatically when required.
– When the vehicle is stopped, put it in neutral and release the clutch pedal. The engine will stop.
– When the clutch pedal is pressed, the engine starts again.
– The instrument panel screen displays information about the status of the Start-Stop function ⇒page 164, fig. 121 .Start-Stop function conditions•The driver's seat belt must be buckled.•The engine hood must be closed.•The engine must be at operating temperature•The steering wheel must be straight.•The vehicle must be on flat ground.•The vehicle must not be in reverse.•A trailer must not be connected.
A1
A3
A3A3GAS
A1
A2
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Driving163
Safety First
Controls and equipment
Practical tips
Technical Data
•The temperature of the passenger compartment must be within the
convenience limits (button ⇒page 152, fig. 114 should be selected).•The windscreen de-mist function must be off.•If not , it requires an increase in airflow ⇒page 152, fig. 114 for more
than three presses.•Either of the temperature settings, HI or LO must not be set.•The driver's door must be closed.•The diesel particulate filter must not be in regeneration mode, for diesel
engines.•The battery charge must not be low for the next start.•The battery temperature must be between -1°C and 55°C.•The parking assistant, Park Assist* must not be activated.
Interrupting the Start-Stop function
In the following situations, the Start-Stop function will be interrupted and the
engine will automatically start:•The vehicle is moving.•The brake pedal is pressed several times in a row.•The battery has been discharged excessively.•The Start-Stop System has been manually deactivated.•The windscreen de-mist function is turned on.•The temperature of the passenger compartment exceeds the convenience
limits (button ⇒page 152, fig. 114 should be selected).•If in an increase in airflow ⇒page 152, fig. 114 is required for more
than three presses.•Either of the temperature settings, HI or LO, is selected.•The engine coolant temperature is insufficient.•The alternator is faulty, for example the V-belt has ruptured.•If any of the conditions described in the previous section are not fulfilled.
WARNING
Never allow the vehicle to move with the engine off for any reason. You
could lose control of your vehicle. This could cause an accident and serious
injury.•The brake servo does not work when the engine is not running. You
need more force to stop the vehicle.•Power assisted steering does not work when the engine is not running.
That is why it is much more difficult to turn the steering wheel.Note
•For vehicles with the Start-Stop function and a manual gearbox, when the
engine is started, the clutch must be pressed.•When the conditions for the Start-Stop function are not fulfilled, the dash
panel displays the Start-Stop indicator dimmed.•The vehicle can be restarted by rotating the steering wheel three times,
that is, more than 270°.
ACA11
A10
ACA11
A10
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Trailer towing
194•Find out whether special regulations apply to towing a trailer in your
country.Ball coupling of towing bracket*Depending on the model version, the spherical head on the trailer hook may
be found in the tool box.
The ball coupling is provided with instructions on fitting and removing the
ball coupling of the towing bracket.
WARNING
The towing bracket ball coupling must be stored securely in the luggage
compartment to prevent them being flung through the vehicle and causing
injury.
Note
•By law, the ball coupling must be re moved if a trailer is not being towed
and it obscures the number plate.Driving tipsDriving with a trailer always requires extra care.Weight distribution
The weight distribution of a loaded trailer with an unladen vehicle is very
unfavourable. However, if this cannot be avoided, drive extra slowly to allow
for the unbalanced weight distribution. Speed
The stability of the vehicle and trailer is reduced with increasing speed. For
this reason, it is advisable not to drive at the maximum permissible speed in
an unfavourable road, weather or wind conditions. This applies especially
when driving downhill.
You should always reduce speed immediately if the trailer shows the slightest
sign of
snaking . Never try to stop the “snaking” by increasing speed.
Always brake in due course. If the trailer has an overrun brake, apply the
brakes gently at first and then, firmly. This will prevent the jerking that can be
caused by the trailer wheels locking. Select a low gear in due course before
going down a steep downhill. This enables you to use the engine braking to
slow down the vehicle.
Reheating
At very high temperatures and during prolonged ascents, driving in a low gear
and high engine speed, always monitor the temperature indicator for the
coolant ⇒page 53.
Electronic Stabilisation Program*
The ESP* system makes it easier to stabilise the trailer in case it skids or
swings.
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Checking and refilling levels215
Safety First
Controls and equipment
Practical tips
Technical Data
Winter driving
Diesel can thicken in winter.Winter-grade diesel
When using “summer-grade diesel fuel”, difficulties may be experienced at
sub-zero temperatures because the fuel thickens due to wax separation.
Therefore, “winter-grade diesel fuel” is available in some countries during
the cold months. It can be used at temperatures as low as -22°C.
In countries with different climatic conditions the diesel fuel generally sold
has different temperature characteristics. Check with an Authorised Service
Centre or filling stations in the country concerned regarding the type of diesel
fuels available.
Filter pre-heater
Your vehicle is fitted with a fuel filter pre-heater, making it well equipped for
operation in winter. This ensures that the fuel system remains operational to
approx. -24°C, provided you use winter-grade diesel which is safe to -15°C.
However, if the fuel has waxed to such an extent that the engine will not start
at temperatures of under -24°C, simply place the vehicle in a warm place for
a while.
Caution
Do not mix fuel additives (“thinners”, or similar additives) with diesel fuel.
Working in the engine compartmentSafety instructions on working in the engine compartment
Any work carried out in the engine compartment or on the
engine must be carried out cautiously.Before starting any work on the engine or in the engine compart-
ment:
1. Switch off the engine and remove the key from the ignition.
2. Apply the handbrake.
3. Move the gear stick to neutral or the selector lever to position P.
4. Wait for the engine to cool down.
5. Keep children away from the vehicle.
6. Raise the bonnet ⇒page 217.You should not do any work in the engine compartment unless you know
exactly how to carry out the jobs and have the correct tools! Have the work
carried out by a qualified workshop if you are uncertain.
All service fluids and consumables, e.g. coolant, engine oil, spark plugs and
batteries, are being constantly developed. SEAT provides a constant flow of
information to the Authorised Service Centres concerning modifications. For
this reason, we recommend you to have service fluids and consumables
replaced by an Authorised Service Centre. Please observe the relevant
instructions ⇒page 206. The engine compartment of any motor vehicle is a
hazardous area ⇒.
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Checking and refilling levels
216
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 gear 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 264. 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.•Al wa ys m ake s u re yo u ha ve n o t l e f t a ny o bj e c t s , s u ch as cl e an i n g cl o t h s
and tools, in the engine compartment.•If you have to work underneath the vehicle, you must use suitable
stands additionally to support the vehicle, 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 belts, 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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