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Checking and refilling levels204
Petrol additives
Petrol additives improve the quality of the petrol.
The quality of the petrol influences running behaviour, performance and
service life of the engine. For this reason, you should use good quality petrol
containing additives. These additives will help to prevent corrosion, keep the
fuel system clean and prevent deposits from building up in the engine.
If good quality petrol with additives is not available or engine problems occur,
the required additives must be added during refuelling.
Diesel
Diesel*
Diesel fuel must correspond to DIN EN 590 (EN = “European standard”). It
must have a cetane number (CN) of at least 51. The cetane number indicates
the ignition quality of the diesel fuel.
Notes on filling with fuel ⇒ page 202.
Biodiesel*
The biodiesel fuel must comply with the DIN EN 14.214 (FAME) Standard.
• Biodiesel is a methylester obtained from rapeseed oil.
• DIN is the German abbreviation for “Deutsches Institut für Normung e.V.”,
the German standards institute.
• EN means European Norm.
• FAME is the English abbreviation for “Fatty Acid Methyl Ester”
Your Authorised Service Centre can also be consulted to know if the vehicle
has been prepared for biodiesel use.
Things to note about RME fuel (biodiesel)
• The performance of a vehicle using biodiesel maybe somewhat reduced.
• Fuel consumption of a vehicle using biodiesel may be slightly higher.
• RME fuel is resistant to the cold down to approx. -10°C.
• At temperatures below -10°C, we recommend using winter diesel fuel.
• Your vehicle is designed to be refuelled with up to a maximum of 7%
blended biodiesel in accordance with standard DIN 51628.
Caution
• RME fuel can damage the fuel system in vehicles which are not suitably
adjusted.
• If you decide to use biodiesel in your vehicle, please use only RME fuel
which is DIN E 14,214 compliant.
• If you use biodiesel that does not meet the required standard, the fuel
filter could become clogged.
Note
• In case of low exterior temperatures and a fuel biodiesel percentage of
higher than 50%, an increase in gas emission may occur during operation of
the independent heating.
• The fuel filter may become clogged when fuel is changed to biodiesel. For
this reason, we recommend you that, when having run 300 or 400 km after a
fuel change, the fuel filter change must also be done. Also note the instruc-
tions in the Inspection and Maintenance plan.
• If the vehicle is to remain parked for more than about two weeks, we
recommend filling the fuel tank with biodiesel and driving about 50 km in
order to avoid damage to the injection system.
leon_ingles Seite 204 Montag, 26. Januar 2009 4:29 16
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