Premium Unleaded Gasoline; Fuel Requirements - Mercedes-Benz 2006 SL 500 Operator's Manual

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Technical data
Fuels, coolants, lubricants, etc.

Premium unleaded gasoline

Warning!
Gasoline is highly flammable and poisonous.
It burns violently and can cause serious
injury. Whenever you are around gasoline,
avoid inhaling fumes and skin contact,
extinguish all smoking materials. Never
allow sparks, flame or smoking materials
near gasoline!
448
!
To maintain the engine's durability and
performance, premium unleaded gaso-
G
line must be used. If premium unleaded
is not available and low octane fuel is
used, follow these precautions:
have the fuel tank only partially
filled with unleaded regular and fill
up with premium unleaded as soon
as possible
avoid full throttle driving and abrupt
acceleration
do not exceed an engine speed of
3000 rpm if the vehicle is loaded
with a light load such as two occu-
pants and no luggage
do not exceed
celerator pedal position if the vehi-
cle is fully loaded or operating in
mountainous terrain

Fuel requirements

Only use premium unleaded fuel:
The octane number (posted at the
pump) must be 91 min. It is an average
of both the Research (R) octane num-
ber and the Motor (M) octane number:
(R+M)/2). This is also known as the
ANTI-KNOCK INDEX.
Unleaded gasoline containing oxygenates
such as ethanol, IPA, IBA and TBA can be
used provided the ratio of any one of these
oxygenates to gasoline does not exceed
10%; MTBE must not exceed 15%.
The ratio of methanol to gasoline must not
exceed 3% plus additional cosolvents.
2
/
of maximum ac-
3

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