2013 Seat Leon SC open gas tank

248Checking and refilling levels
The engine management automatically adapts to the natural gas used ac-
cording to its quality. Therefore, different quality gases can be mixed in the
tank, without the need for comprehensive draining before applying a differ-
ent quality gas.
The instrument panel display shows information on the current natural gas
quality ⇒ page 73.
Natural gas and safety
If you can smell gas or suspect that there is a leak ⇒ 
:
● Stop the vehicle immediately.
● Switch the ignition off.
● Open the doors to appropriately ventilate the vehicle.
● Extinguish cigarettes immediately.
● Move away from the vehicle or switch off objects that may cause sparks
or a fire.
● If you continue to smell gas, do not continue driving!
● Seek specialist assistance. Have the fault repaired.
WARNING
Failure to act when you can smell gas in the vehicle or when refuelling
can cause serious injuries.
● Carry out the necessary operations.
● Leave the danger zone.
● If necessary, warn the emergency services.
WARNING
The vehicle is not prepared to use liquefied natural gas (LNG) and this
fuel must not be added under any circumstances. Liquefied natural gas
can cause the natural gas tank to explode resulting in serious injury.
Note
Have natural gas system checked regularly by a specialised workshop in ac-
cordance with the Maintenance Programme. 
Filling the tank Filling the tank
Fig. 151 Fuel tank flap
with tank cap attached
The flap that covers the tank cap is unlocked and locked automati-
cally by the central locking.
Opening the fuel tank cap
– Open the fuel tank flap, by pressing on the left side.
– Unscrew the fuel tank cap anti-clockwise. 

250Checking and refilling levels
For the sake of the environment
Do not overfill the fuel tank – it may cause the fuel to overflow if it becomes
warm.
Note
Diesel vehicles are fitted with a protective device that prevents the insertion
of the wrong fuel hose 1)
. It is only possible to refuel with Diesel nozzles.
● If the pump nozzle is worn, damaged, or if it is very small, it is possible
that it will not be able to open the protective device. Before trying to insert
the pump nozzle by turning it, try a different pump or request specialist
help.
● If you fill the tank from a reserve fuel canister, the protective device will
not open. One way to resolve this is to pour the fuel in very slowly. 
Refuelling natural gas
Fig. 152 Tank flap open:
gas filler mouth 1, filler
mouth retainer 2
Before refuelling, the engine and the ignition, mobile telephone and heat-
ing must be switched off separately
⇒ .
Read the instructions on how to use the natural gas pump carefully.
The vehicle is not prepared for refuelling with liquefied natural gas (LNG)
⇒ 
. Before refuelling with natural gas, make sure to add the appropriate
type of fuel ⇒ page 246.
Opening the fuel tank cap
The natural gas filler mouth is behind the fuel tank cap, next to the petrol
filler mouth.
● Unlock the vehicle with the key or with the central locking button 
situ-
ated on the driver door ⇒ page 87.
● Press on the rear area of the flap and open it.
Refuelling
Thing to note: if the ambient temperature is very high, the natural gas pump
protection against overheating may disconnect this automatically.
● Remove the plug from the gas filler mouth ⇒ Fig. 152 1
.
● Connect the pump filling nozzle to the gas filler mouth.
● The fuel tank will be full when the pump compressor automatically cuts
the supply.
● If you wish to finish refuelling in advance, press the button on the pump
to stop the flow.
Closing the fuel tank cap
● Check that the gas filler mouth retainer 2
is not trapped with the filler
nozzle. If necessary, place it in the filler mouth again.
● Insert the plug in the filler mouth.
● Close the tank flap. Make sure you hear it click into place. 
1)
according to the country

M
Main beam assist . . . . . . . . . . . . . . . . . . . . . . . 114
Main beam headlight . . . . . . . . . . . . . . . . . . . . 111
Main beam lever . . . . . . . . . . . . . . . . . . . . . . . . 110
Maintenance Airbags . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Malfunction adaptive cruise control . . . . . . . . . . . . . . . 190
Front Assist . . . . . . . . . . . . . . . . . . . . . . . . . 203
Front Assist Monitoring system . . . . . . . . . 203
Manual gearbox . . . . . . . . . . . . . . . . . . . . . . . . 172 Kick-down . . . . . . . . . . . . . . . . . . . . . . . . . . 166
Manual locking of passenger door in an emer- gency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99
Manual operation Selector lever . . . . . . . . . . . . . . . . . . . . . . . 182
Manual operation in an emergency Passenger door . . . . . . . . . . . . . . . . . . . . . . 99
Rear lid . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101
messages on the instrument panel display adaptive cruise control . . . . . . . . . . . . . . . 190
Front Assist Monitoring system . . . . . . . . . 203
Mobile phones . . . . . . . . . . . . . . . . . . . . . . . . . 272
Modifications (technical) . . . . . . . . . . . . . . . . . 272
Monitoring system Front Assist . . . . . . . . . . . . 202
Motorway lights . . . . . . . . . . . . . . . . . . . . . . . . 112
Mounting/dismounting the head restraints . . 132
Mounting pin (tyre change) . . . . . . . . . . . . . . . 274
Mounting points (jack) . . . . . . . . . . . . . . . . . . . 280
Moving off Hill driving assistant . . . . . . . . . . . . . . . . . 168 Multi-collision Brake . . . . . . . . . . . . . . . . . . . . 223
N
Natural gas . . . . . . . . . . . . . . . . . . . . . . . . . . . . 247 fuel tank cap . . . . . . . . . . . . . . . . . . . . . . . . 250
refuelling . . . . . . . . . . . . . . . . . . . . . . . . . . . 250
smell . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 248
things to note . . . . . . . . . . . . . . . . . . . . . . . 250
Things to note . . . . . . . . . . . . . . . . . . . . . . . . 67
Natural Gas LNG . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 251
Natural gas quality . . . . . . . . . . . . . . . . . . . . . . 247
Navigation system CD-ROM player . . . . . . . . . . . . . . . . . . . . . . 134
Net bag luggage compartment . . . . . . . . . . . . . . . . 147
Net partition . . . . . . . . . . . . . . . . . . . . . . . 142, 143
Noises adaptive cruise control . . . . . . . . . . . . . . . 190
refuelling natural gas . . . . . . . . . . . . . . . . . 251
Number of colour . . . . . . . . . . . . . . . . . . . . . . . 305
Number of seats . . . . . . . . . . . . . . . . . . . . . . . . . 20
O
Octane rating (petrol) . . . . . . . . . . . . . . . . . . . . 246
Odometer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
Oil change . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 256
Oil properties . . . . . . . . . . . . . . . . . . . . . . . . . . 254
One-touch opening and closing Electric windows . . . . . . . . . . . . . . . . . . . . . 104 Opening . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87
Bonnet . . . . . . . . . . . . . . . . . . . . . . . . . . . . 252
Fuel tank cap . . . . . . . . . . . . . . . . . . . . . . . 250
Fuel tank flap . . . . . . . . . . . . . . . . . . . . . . . 248
Panoramic sliding sunroof . . . . . . . . . . . . . 106
Panoramic sunroof . . . . . . . . . . . . . . . . . . . 106
Rear lid . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100
Windows . . . . . . . . . . . . . . . . . . . . . . . . . . . 102
Opening/Closing In the lock cylinder . . . . . . . . . . . . . . . . . . . . 98
With remote control . . . . . . . . . . . . . . . . . . . 92
With the central locking switch . . . . . . . . . . 94
Outside temperature . . . . . . . . . . . . . . . . . . . . . 64
Outside temperature display . . . . . . . . . . . . . . . 73
Overview Turn signal and main beam lever . . . . . . . 110
Overview (controls and displays) . . . . . . . . . . . 59
P
Paint code . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 305
Paint damage . . . . . . . . . . . . . . . . . . . . . . . . . . 241
Panoramic sliding sunroof . . . . . . . . . . . . . . . . 106 Closing . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106
Convenience closing . . . . . . . . . . . . . . . . . 107
Convenience opening . . . . . . . . . . . . . . . . 107
Fault . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106
Opening . . . . . . . . . . . . . . . . . . . . . . . . . . . 106
Roll-back function . . . . . . . . . . . . . . . . . . . 107
Parking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 167
Parking aid Adjusting the display/audible warnings . 221
Environment warning . . . . . . . . . . . . . . . . . 219
331
Index