Skoda citigo Owner's Manual page 102

WARNING (Continued)
When refuelling, never get into the vehicle. If you have to get into your
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vehicle in exceptional cases, touch a metal surface before you touch the
filling coupling again. This will avoid electrostatic discharges, which may
generate sparks. Sparks can cause a fire during refuelling.
Natural gas is highly explosive and highly flammable. Incorrect refuelling
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or improper handling of natural gas can cause a fire, an explosion and inju-
ries.
Note
The natural gas system of your vehicle is suitable both for "slow fuelling" (fu-
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elling from small compressors) and for "quick fuelling" (fuelling from natural
gas stations with large compressors).
During the filling process sounds are heard which are harmless. If you are un-
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sure which service station staff to use, ask the petrol station staff.
If the vehicle is parked for a longer period of time immediately after refuel-
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ling, the situation may arise in which the pointer of the fuel tank gauge does
not indicate exactly the same level as was the case immediately after refuel-
ling when the engine is restarted. This is not due to any system leakages but a
drop in pressure in the natural gas fuel tank due to technical reasons after a
cooling phase directly after refuelling.
In frequent short-haul traffic, especially at low outside temperatures, the ve-
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hicle is driven more frequently in petrol mode than in CNG mode. This is why
the petrol tank runs empty faster than the natural gas tank.
The capacity of the natural gas fuel tank is about 11 litres, of which about 1.5
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litres are in reserve.
The capacity of the gasoline fuel tank is about 10 litres, of which about 5 li-
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tres are in reserve.
Automatic switching from CNG to petrol mode

Read and observe on page 98 first.
The vehicle automatically switches from natural gas to petrol, for example, if
one of the following cases occurs.
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With an empty gas tank or not enough pressure in the tank.
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After refuelling with natural gas.
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At very low surrounding temperatures.
100
General Maintenance
Regular gas system checks

Read and observe on page 98 first.
The following inspections must be carried out in a specialist workshop every 2
years.
›
Check the filler cap.
›
Check the condition of fuel filler tubes and the sealing ring in the fuel filler
tunes and clean sealing ring if necessary.
›
Check gas system for leaks.
The following inspections must be carried out in a specialist workshop every 4
years.
›
Check container fixing and any possible damage.
Safe natural gas

Read and observe on page 98 first.
The safety concept of the natural gas system ensures safe operation. It is
equipped with the following security features.
›
At each natural gas tank, there is a solenoid valve that closes automatically
after turning off the ignition or when running in petrol mode.
›
A thermal fuse prevents an uncontrolled rise in pressure in the gas tank, for
example, at extremely high outside temperatures.
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A flow limiter prevents sudden emptying of the natural gas tank in case the
system is damaged.
Natural gas quality and consumption

Read and observe on page 98 first.
Depending on the natural gas supplier, the natural gas quality (heating value)
may vary. The higher the calorific value of natural gas, the lower is the con-
sumption.
Within a natural gas quality grade, the heating value may vary. The engine con-
trol unit adjusts automatically to the natural gas quality.