BMW 520D Benutzerhandbuch

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Tank cap
Fastening
Fit the tank cap and turn clockwise until it is 
clearly heard to click into place.
Do not crush the tape attached to the cap. 
A message will appear if the cap is loose 
or missing.
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Fuel grade
Petrol engine
Never use fuel containing lead, otherwise 
the catalytic converter will be perma-
nently damaged.
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Ultra low sulphur petrol may also be used. Since 
the engine has a knock control function, it can 
run on different grades of fuel.
>
The engine of your BMW is rated to run on:
Super Plus/premium plus fuel, octane 
number 98 RON. 
Fill up with fuel of this grade whenever pos-
sible, so that the nominal performance and 
fuel consumption values are achieved.
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You can also run the engine on:
Premium-grade unleaded fuel, octane 
number 95 RON. 
This fuel is also sold under the following 
designations: 
DIN EN 228 or Eurosuper.
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The minimum permissible grade is:
Regular-grade unleaded fuel, octane 
number 91 RON. 
If this grade of fuel is being used, the engine 
may tend to make a knocking sound while 
being started at high ambient tempera-
tures. This has no influence on the engine's 
operating life.
National-market versions supplied 
to run on leaded fuel*
With this specification, in addition to the grades 
listed above, you can run the engine on leaded 
fuel. The minimum grade is likewise 91 RON.
Diesel engine
Do not use rapeseed methyl ester RME, 
biodiesel or petrol. If the wrong type of 
fuel has been added, do not start the engine, 
otherwise you risk causing damage to it.
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Contact BMW Service if the wrong type of fuel 
has been added.
>
Your BMW's engine is rated to run on:
Diesel oil to DIN EN 590 standard.
Winter-grade diesel oil
To ensure that the diesel engine operates relia-
bly during the cold season of the year, it must 
be run on winter-grade diesel oil, which garages 
usually sell during the period in question. Fuel 
filter heating is installed as standard equipment 
to prevent the fuel solidifying during operation.
Do not incorporate any additives, includ-
ing petrol, as these could cause damage 
to the engine.
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Online Edition for Part-No. 01 41 0 159 725 © 09/05 BMW AG