CAUTIONThe following instructions must be observed, otherwise there is a risk of dam-
age to the engine and to the exhaust system.■
If a different fuel other than diesel fuel, which complies to the above men-
tioned standards (e.g. petrol) is used, do not start the engine or switch on the
ignition!
■
The biofuel RME must not be used!
CAUTION
Diesel fuel additives■The diesel fuel in accordance with the prescribed standards meets all the
conditions for a smooth running engine. Therefore, we recommend that you do
not add any fuel additives to the diesel - - there is a risk of engine damage or
damage to the exhaust system.
Refuel CNG (compressed natural gas)
Fig. 288
Natural gas filler tubes
Read and observe
and on page 248 first.
Refuel with natural gas under the following conditions. The vehicle is unlocked.
The engine and the ignition are switched off.
The auxiliary heating and ventilation is switched off » page 109.
Natural gas refuelling may vary from station to station. If refuelling with natu-
ral gas at a station is unfamiliar to you, get someone to instruct you or allow
the fuelling operation to be carried out by the station staff.
Refuelling operation
›
Open the fuel filler flap.
› Remove cap A
» Fig. 288 in the direction of the arrow and insert connector
for the refuelling system into filler neck B.
The fuel tank is full when the compressor of the refuelling system automati-
cally switches off.›
Check that sealing ring
C
» Fig. 288 has remained inserted in filler neck
B
. If
the sealing ring has slipped on the connector, reinsert it into the filler neck.
›
Insert cap
A
into the filler neck and close the fuel filler flap until it locks into
place.
The natural gas refuelling systems have an overfill protection relating to the
outdoor temperature. At very high outside temperatures, it may happen that
the gas tank may not be fully refuelled.
If the vehicle is parked directly after a refuelling operation, on restart the
pointer of the gas gauge may not show exactly the same level as immediately
after the filling process. This is not a leak in the system, but a reduction in
pressure due to the cooling of the gas in the gas tank after refuelling.
The maximum lifetime of the gas tank is 20 years.
The capacity of the natural gas fuel tank is approximately 15 kg.
WARNING■
Natural gas is highly explosive and highly flammable.■When refuelling, never get into the vehicle. If you have to get into your
vehicle in exceptional cases, touch a metal surface before you touch the
filling coupling again. Otherwise, electrostatic discharging may occur -
There is a risk of fire!
Note
During the filling process sounds are heard which are harmless. If you are un-
sure which service station staff to use, ask the petrol station staff.251Inspecting and replenishing
CNGFig. 289
Position of the CNG label(s).
Read and observe
and on page 248 first.
A G-TEC-vehicle may be operated with CNG and petrol.
Positioning of the CNG sticker in natural gas vehicles » Fig. 289.
Automatic switching from natural gas to petrol operation - Automatic switch-
ing from natural gas to petrol operation takes place in the following situations
(examples). ▶ With an empty gas tank or not enough pressure in the tank.
▶ After refuelling with natural gas.
▶ At very low surrounding temperatures.
To ensure the correct functioning of the fuel system, every 6 months the fuel tank for petrol should be run down until the warning light comes on.
Gas leak
If a gas leak is suspected (noticeable odour), proceed as follows. ▶ Stop the vehicle.
▶ Switch off the ignition.
▶ Extinguish cigarettes, switch off spark-producing or incendiary items and re-
move them from the vehicle.
▶ Open the doors and the boot lid to ventilate the vehicle sufficiently.
▶ Do not continue to drive if the odour persists.
▶ If it is not possible to leave an enclosed area with a vehicle with a gas leak
(e.g. in a tunnel, underpass, garage, ferry, etc.), call the emergency services
immediately.
Seek help from a specialist garage to correct the gas system fault.
In a traffic accident
If a gas leak is suspected in a traffic accident, proceed as follows.
▶ Switch off the ignition.
▶ Extinguish cigarettes, switch off spark-producing or incendiary items and re-
move them from the vehicle.
▶ Have all the occupants get out.
▶ Keep all persons away from the vehicle. We recommend standing at least 10
metres from the vehicle.
▶ Inform the emergency services that it is a natural gas vehicle.
Regular gas system checks
Regular gas system checks must be carried out in a specialist workshop on
natural gas-powered vehicles. The vehicle owner is responsible for ensuring
tests are conducted properly.
Every 2 years ▶ Check the filler cap.
▶ Check the condition of fuel filler tubes and the sealing ring in the fuel filler
tubes, and clean the sealing ring if necessary.
▶ Check the gas system for leaks and carry out an examination of gas contain-
ers.
Every 20 years ▶ Replace the gas tank.WARNING■ Do not underestimate the smell of gas in the car or when refuelling - risk
of fire, explosion and injury.■
The natural gas tanks in the vehicle must not be exposed to unwanted
heat sources.
Engine compartment
Introduction
This chapter contains information on the following subjects:
Opening and closing the bonnet
253
Engine compartment overview
254
Windscreen washer fluid
254
252General Maintenance
