Mercedes Benz 2009 M-Class User Manual

Page of 585
353
Operation
At the gas station
Open the fuel filler flap completely.
Turn the fuel cap to the left and hold on 
to it until possible pressure is released.
Take off the fuel cap.
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 up or over-
fill
.
Replace the fuel cap by turning it 
clockwise until it audibly engages.
Close the fuel filler flap.
You should hear the latch close shut.
!
The fuel filler cap is tethered to the fuel filler 
neck. Do not drop the cap. It could damage the 
vehicle paint finish.
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
Leaving the engine running and the fuel cap 
open can cause the yellow fuel tank reserve 
warning lamp to flash and the 
malfunction 
indicator lamp (USA only) or the
± malfunc-
tion indicator lamp (Canada only) comes on.
For more information, see “Practical hints” 
(
page 417).
i
Gasoline engine: Only use premium unlead-
ed gasoline with a minimum Posted Octane Rat-
ing of 91  (average of 96 RON/86 MON). 
Information on gasoline quality can normally be 
found on the fuel pump.
For more information on gasoline, see “Premium 
unleaded gasoline (gasoline engine)” 
(
page 547), see “Fuel requirements” 
(
page 548), and the Factory Approved Service 
Products pamphlet.
i
Diesel engine: Only use commercially avail-
able vehicular diesel fuels No. 2 or No. 1 (ASTM 
D975 No. 2-D or No. 1-D). Information on diesel 
quality can normally be found on the fuel pump.
The sulfur content in diesel fuel should not 
exceed 50 parts per million (ppm). When using 
diesel fuel with a sulfur content of above 
300 ppm, the engine oil interval should be 
shortened.
For more information on diesel fuels, refer to the 
Factory Approved Service Products pamphlet or 
contact an authorized Mercedes-Benz Light 
Truck Center.
!
Diesel engine:
The engine is more susceptible to wear and 
damage if you use
marine diesel fuel
heating oil
additives
The use of such non-approved fuels and/or 
special additives is not covered by the 
Mercedes-Benz Limited Warranty.