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551
Operation
At the gas station
̈ Take off the fuel filler cap and set it in
the direction of arrow 2 and place it
into holder 3 located on the inside of
the fuel filler flap.
To prevent fuel vapors from escaping
into open air, fully insert filler nozzle
unit.
̈ Only fill your tank until the filler nozzle
unit cuts out – do not top off or over-
fill.
̈ Replace the fuel cap by turning it clock-
wise until it audibly engages.
̈ Close the fuel filler flap.
You should hear the latch close shut.
Warning! G
Overfilling of the fuel tank may create pres-
sure in the system which could cause a gas
discharge. This could cause the gas to spray
back out when removing the fuel pump noz-
zle, which could cause personal injury.
i
Make sure to close the fuel filler flap before
locking your vehicle as the flap locking pin pre-
vents closing after you have locked the vehicle.
i
Only use premium unleaded gasoline with a
minimum Posted Octane Rating of 91 (average of
both the Research Octane Number (RON) and
the Motor Octane Number (MON):
(96 RON+86 MON)/2.
Information on gasoline quality can normally be
found on the fuel pump. Please contact gas sta-
tion personnel in case labels on the fuel pump
cannot be found.
For more information on gasoline, see “Premium
unleaded gasoline” (
୴ page 737), see “Fuel re-
quirements” (୴ page 737), and the Factory Ap-
proved Service Products pamphlet (USA only) in
your vehicle literature portfolio, or contact an au-
thorized Mercedes-Benz Center.
i
Leaving the engine running and the fuel cap
open can cause the yellow engine malfunction
indicator lamp ± to illuminate.
For more information, see the “Practical hints”
section (
୴ page 612).