2011 Seat Leon 5D coolant temperature

162Driving
WARNING
● Never start or run the engine in unventilated or closed rooms. The ex-
haust fumes contain carbon monoxide, an odourless and colourless poi-
sonous gas. Risk of fatal accidents. Carbon monoxide can cause loss of
consciousness. It can also cause death.
● Never leave the vehicle unattended if the engine is running.
● Never use “cold start sprays”, they could explode or cause the engine
to run at high revs. Risk of injury.
CAUTION
● When the engine is cold, you should avoid high engine speeds, driving
at full throttle and over-loading the engine. Risk of engine damage.
● The vehicle should not be pushed or towed more than 50 metres to start
the engine. Unburnt fuel could enter the catalytic converter and damage it.
● Before attempting to push-start or tow a vehicle in order to start it, you
should first try to start it using the battery of another vehicle. Note and fol-
low the instructions in ⇒ page 263, Jump-starting.
For the sake of the environment
Do not warm-up the engine by running the engine with the vehicle station-
ary. You should drive off as soon as you start the engine. This helps the en-
gine reach operating temperature faster and reduces emissions. 
Switching off the engine
– Stop the vehicle.
– Turn the ignition key to position ⇒ fig. 117 0
.
After switching the engine off, the radiator fan may run on for up to 10 mi-
nutes. It is also possible that the fan turns itself on once more if the coolant temperature increases due to the heat accumulated in the engine compart-
ment or due to its prolonged exposure to solar radiation.
WARNING
● Never switch the engine off until the vehicle is completely stationary.
● The brake servo works only when the engine is running. With the en-
gine switched off, more strength is needed to brake. As normal brake op-
eration cannot be performed, risk of accidents and serious injury may ex-
ist.
● The steering lock can be immediately blocked once the key is re-
moved from the ignition. The vehicle cannot be steered. Risk of accident.
CAUTION
When the engine has been running under a heavy load for a long period,
heat can accumulate in the engine compartment and cause engine damage.
For this reason, you should idle the engine for approx. 2 minutes before you
switch it off. 

163
Driving
Driving with LPG*
Fig. 118 Centre console:
gas system control
switch.
Your SEAT vehicle has a bivalent engine able to run on either LPG or petrol.
The LPG tank ⇒ page 212, 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 GAS
button located on the centre
console ⇒  fig. 118. The selected operating mode is displayed on the indica-
tor lamp on the instrument panel ⇒ page 79.
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
When the engine is turned on and the following conditions are met, the sys-
tem will automatically switch from petrol mode to LPG mode, the notifica-
tion changed to GAS mode is displayed and the green indicator lamp on the
instrument panel lights up: ●
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.
Automatic switch from LPG to petrol
When the vehicle is operating in LPG mode and one of these conditions is
met, the system automatically switches to petrol mode, the notification changed to petrol mode is displayed and the green indicator lamp on the in-
strument panel goes out:
● When the engine is started.
● If the LPG tank is empty.
● If there is a fault in the LPG system.
● At very low temperatures, below -10°C.
Manual switch from petrol to LPG
Press the GAS
button on the centre console ⇒ 
fig. 118 to change mode. The
notification changed to GAS mode is displayed. When the following condi-
tions are met, the system switches to LPG mode, the green indicator lamp
on the instrument panel lights up and the notification displayed changes to changed to GAS mode .
● 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.
Manual switch from LPG to petrol
Press the GAS
button on the centre console ⇒ fig. 118 to change mode. The
green lamp on the instrument panel goes out and the notification changed
to petrol mode is displayed.
Running on petrol
Run the engine with petrol for short journeys at regular intervals to avoid
problems in the petrol system. 
Safety FirstOperating InstructionsPractical TipsTechnical Specifications

165
Driving
● If in an increase in airflow 10
⇒ fig. 113 is required for more than three
presses.
● Temperature setting 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 fulfil-
led.
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 seri-
ous injury.
● The brake servo does not work with the engine off. You need more
force to stop the vehicle.
● Power steering does not work when the engine is not running. That is
why it is much more difficult to turn the steering wheel.
● Disconnect the Start-Stop system when driving through water (ford-
ing streams, etc.).
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 in-
strument panel displays the Start-Stop indicator dimmed.
● If the steering wheel is turned more than 270°, it will not be possible to
start the vehicle again. To start the vehicle, straighten the steering wheel so
that it is turned less than 270°. Activating and deactivating the Start-Stop function
Fig. 119 The Start-Stop
function button.
Every time the ignition is switched on, the Start-Stop function is au-
tomatically switched on.
Manually deactivating the Start-Stop function
– Press the A
⇒ fig. 119 located in the centre console. When the
Start-Stop function is deactivated, the pushbutton indicator
lights.
– If the Start-Stop function is operating then the engine starts im-
mediately.
Switching the Start-Stop function on manually
– Press the A
⇒ fig. 119 located in the centre console. The indi-
cator on the button will go out. 
Safety FirstOperating InstructionsPractical TipsTechnical Specifications

196Trailer towing
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 caus-
ing injury.
Note
● By law, the ball coupling must be removed if a trailer is not being towed
and it obscures the number plate. 
Driving tips
Driving 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 slight-
est 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 be-
fore going down a steep downhill. This enables you to use the engine brak-
ing to slow down the vehicle.
Reheating
At very high temperatures and during prolonged slopes, driving in a low
gear and high engine speed, always monitor the coolant temperature gauge
⇒ page 55.
Electronic Stability Control*
The ESC (ESP)* system helps to stabilise the trailer in case of skidding or
rocking. 
Fitting a towing bracket*
It is possible to fit a towing bracket to the rear of the vehicle. 

217
Checking and refilling levels
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 products) with diesel fuel. 
Working in the engine compartment Safety 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 lever 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 219. You should not do any work in the engine compartment unless you know ex-
actly how to carry out the jobs and have the correct tools! Have the work car-
ried out by a specialised workshop if you are uncertain.
All service fluids and consumables, e.g. coolant, engine oil, spark plugs
and batteries, are under constant development. SEAT provides a constant
flow of information to the Authorised Service Centres concerning modifica-
tions. For this reason, we recommend you to have service fluids and con-
sumables replaced by an Authorised Service Centre. Please observe the rel-
evant instructions
⇒ page 208. The engine compartment of the vehicle is a
hazardous area ⇒ 
.
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 en-
gine 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 lever 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. 
Safety FirstOperating InstructionsPractical TipsTechnical Specifications

218Checking and refilling levels
WARNING (Continued)
● 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 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 trap-
ped in rotating engine parts. Danger of death. Before starting any
work remove jewellery, tie back and cover hair, and wear tight-fitting
clothes.
– Never accelerate with a gear engaged without taking the necessary
precautions. The vehicle could move, even if the handbrake is ap-
plied. Danger of death.
● If work has to be carried out on the fuel system or on electrical com-
ponents, 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.WARNING (Continued)
– Never work near naked flames.
– Always have a fire extinguisher on hand.
CAUTION
When topping up service fluids, make sure not to mistake them. Using the
wrong fluids could cause serious malfunctions and engine damage!
For the sake of the environment
Service fluids leaks are harmful to the environment. For this reason you
should make regular checks on the ground underneath your vehicle. If you
find spots of oil or other fluids, have your vehicle inspected in a specialised
workshop. 

224Checking and refilling levels
Coolant
Coolant 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 provides the necessary freeze protec-
tion 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 freeze
protection is not required.
If greater freeze 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
freeze protection. It would also reduce the cooling effect. A mixture with
60% additive will give antifreeze protection to approx. -40°C.
WARNING
● The coolant additive is toxic. There is a toxic risk. 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 outside temperatures, the coolant
could freeze, causing the vehicle to breakdown. As the heater would not
work either, there is a risk of freezing to death.
CAUTION
● Other additives may give considerably inferior corrosion protection. The
resulting corrosion in the cooling system can lead to a loss of coolant, caus-
ing 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 G12 (red colour) with G 11. 
Checking the coolant level and topping up 
The correct coolant level is important for fault-free function-
ing of the engine cooling system.
Fig. 146 In the engine
compartment: Coolant
expansion tank cap
Before opening the bonnet, read and observe the warnings ⇒ 
in
Safety instructions on working in the engine compartment on
page 217. 

C
Car care Exterior . . . . . . . . . . . . . . . . . . . . . . . . . . . . 200
Catalytic converter . . . . . . . . . . . . . . . . . . . . . . 190
CCS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 178
Central lock button Locking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99
Unlocking . . . . . . . . . . . . . . . . . . . . . . . . . . . 99
Central locking . . . . . . . . . . . . . . . . . . . . . . . . . . 97 Automatic locking system for involuntaryunlocking . . . . . . . . . . . . . . . . . . . . . . . . . . 99
Automatic speed dependent locking and unlocking system* . . . . . . . . . . . . . . . . . . 99
Emergency unlocking system . . . . . . . . . . . 99
Selective unlocking system* . . . . . . . . . . . . 98
Unlocking system* . . . . . . . . . . . . . . . . . . . . 99
Centre console with drink holder . . . . . . . . . . 138
Cetane number . . . . . . . . . . . . . . . . . . . . . . . . . 216
Changing gear see Manual gearbox . . . . . . . . . . . . . . . . . . 167
Changing gear in tiptronic mode . . . . . . . . . . 171
Changing the bulbs Main headlight bulbs . . . . . . . . . . . . . . . . . 255
Tail lights . . . . . . . . . . . . . . . . . . . . . . . . . . 258
Changing the main headlight bulbs Main beam lights . . . . . . . . . . . . . . . . . . . . 257
Side lights . . . . . . . . . . . . . . . . . . . . . . . . . . 258
Turn signal bulbs . . . . . . . . . . . . . . . . . . . . 256
Changing the main headlight lamps dipped lights . . . . . . . . . . . . . . . . . . . . . . . 256 Changing the tail light bulbs
Position light, fog light and tail light on thetailgate . . . . . . . . . . . . . . . . . . . . . . . . . . . 259
Changing the tail lights Luggage compartment lights . . . . . . . . . . 261
Turn signal, side and brake lights on thebody . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 259
Chassis number . . . . . . . . . . . . . . . . . . . . . . . . 270
Checking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 231
Checking battery electrolyte level . . . . . . . . . . 231
Checking engine oil level . . . . . . . . . . . . . . . . . 221
Child safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Child seat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48 Categorisation in groups . . . . . . . . . . . . . . . 48
Group 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Group 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Group 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Groups 0 and 0+ . . . . . . . . . . . . . . . . . . . . . . 48
Safety notes . . . . . . . . . . . . . . . . . . . . . . . . . 46
Securing . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Child seats ISOFIX system . . . . . . . . . . . . . . . . . . . . . . . . 51
on the front passenger seat . . . . . . . . . . . . . 31
Top Tether system . . . . . . . . . . . . . . . . . . . . 51
Cigarette lighter* . . . . . . . . . . . . . . . . . . . . . . . 140
Cleaning alloy wheel rims . . . . . . . . . . . . . . . . 204
Cleaning chrome . . . . . . . . . . . . . . . . . . . . . . . 203
Cleaning engine compartment . . . . . . . . . . . . 205
Cleaning steel wheel rims . . . . . . . . . . . . . . . . 204
Cleaning windows . . . . . . . . . . . . . . . . . . . . . . 202
Climatic* . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 147 Climatronic
General notes . . . . . . . . . . . . . . . . . . . . . . . 155
Clock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
Clothes hook . . . . . . . . . . . . . . . . . . . . . . . . . . 139
Cloth seat covers cleaning . . . . . . . . . . . . . . . . 206
Cockpit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
Coming/leaving home function . . . . . . . . . . . . 118
Compartment for on-board documentation . . 138
Control lamps . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
Control lighting . . . . . . . . . . . . . . . . . . . . . . . . . . 55
Controls electric windows . . . . . . . . . . . . . . . . . . . . . 110
Exterior mirrors . . . . . . . . . . . . . . . . . . . . . . 130
Sliding/tilting sunroof . . . . . . . . . . . . . . . . 112
Convenience closing Sliding/tilting sunroof . . . . . . . . . . . . . . . . 113
Windows . . . . . . . . . . . . . . . . . . . . . . . . . . . 112
Convenience opening Windows . . . . . . . . . . . . . . . . . . . . . . . . . . . 112
Coolant . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 224 Warning lamp . . . . . . . . . . . . . . . . . . . . . . . . 66
Coolant level . . . . . . . . . . . . . . . . . . . . . . . . . . . 224 Warning lamp . . . . . . . . . . . . . . . . . . . . . . . . 82
Coolant loss . . . . . . . . . . . . . . . . . . . . . . . . . . . 224
Coolant temperature Gauge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
Safety instructions . . . . . . . . . . . . . . . . . . . . 82
Warning lamp . . . . . . . . . . . . . . . . . . . . . . . . 82
Correct adjustment of front seat head re- straints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Correct adjustment of rear seat head restraints In-use and non-use positions . . . . . . . . . . . 14
292 Index