KODA Citigo Owner's Manual page 120

In the following situation, it is possible that the tank cannot be fully filled with
natural gas.
›
At very high ambient temperatures. The natural gas refuelling systems have
overheating protection. When the ambient temperature reaches a predefined
value, the refuelling system automatically switches off.
›
If the refuelling system has been in operation for a longer period, the filling
pressure of the natural gas refuelling system slightly drops.
WARNING
Stop the engine before refuelling.
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Always switch off your mobile phone, do not smoke and do not use open
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flames when refuelling with natural gas – risk of explosion!
When refuelling, never get into the vehicle. If you have to get into your vehi-
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cle in exceptional cases, close the door and 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 flammable. Incorrect refuelling or improp-
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er handling of natural gas can cause a fire, an explosion and injuries.
Note
The natural gas system of your vehicle is suitable both for fuelling from small
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compressors (slow fuelling) and for fuelling from natural gas stations with large
compressors (quick fuelling).
Noises that occur during refuelling represent no risk.
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If the vehicle is parked for a longer period of time immediately after refuelling,
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the situation may arise in which the pointer of the fuel tank gauge does not indi-
cate exactly the same level as was the case immediately after refuelling 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.
For frequent short-haul traffic, especially at low outside temperatures, the vehi-
■
cle is driven more frequently in petrol mode than in natural gas mode. This is why
the petrol tank runs empty faster than the natural gas tank.
The capacity of the natural gas tank is about 11 kg, of which about 1.5 kg are a
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reserve.
The capacity of the petrol tank is about 10 l, of which about 5 l are a reserve.
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118
General Maintenance
Automatic switching from CNG to petrol mode

First read and observe the introductory information and safety warn-
ings on page 116.
The vehicle automatically switches over from CNG mode to petrol mode when the
following conditions are met:
›
when starting the engine, if the coolant temperature is below 15 °C,
›
when the natural gas tank is empty,
›
after refuelling with natural gas.
Natural gas as fuel

First read and observe the introductory information and safety warn-
ings on page 116.
Natural gas is an alternative fuel for motor vehicles. Its main component is meth-
ane (CH ). The rest is carbon dioxide and lower hydrocarbons.
4
The strict legal requirements for exhaust emissions of motor vehicles are decisive
for the current significance of natural gas. In direct comparison to all other fossil
fuels, natural gas is one of the fuels which cause the lowest emissions.
Natural gas is odourless and lighter than air. For safety reasons, it is saturated
with odorous substances, so that is perceived even in very small amounts.
Regular gas system checks

First read and observe the introductory information and safety warn-
ings on page 116.
Every two years, the following inspections must be carried out:
›
Check the condition of the fuel filler cap, filler neck and sealing ring, and clean
sealing ring if necessary.
›
Check gas system for leaks.
The following checks must be carried out every four years:
›
Check gas tank mounting for secure attachment and possible damage.

The gas tank must be filled prior to the regular gas system check.
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