Mercedes-Benz 2003 M-Class Operator's Manual page 204

Operation
Engine compartment
Engine oil level display
1 Knob
2 Display in speedometer
Switch on the ignition and wait until the
display appears in the
- - - - - -
speedometer display 2.
Within one second press knob 1 twice.
One of the following messages will subse-
quently appear in the display:
OIL i.O
The oil level is correct. Engine oil does
not to be added.
204
– 1.0 L
Add 1 liter of engine oil.
– 1.5 L
Add 1.5 liters of engine oil.
– 2.0 L
Add 2 liters of engine oil.
OIL HI
The oil level is too high.
Have excess oil siphoned.
!
Excessive oil must be siphoned or
drained off. It could cause damage to
the engine and catalytic converter not
covered by the Mercedes-Benz Limited
Warranty.
The display flashes in the
- - - - - -
speedometer display if a proper oil level
check cannot be performed.
Repeat the engine oil level check after
a few minutes.
i
If the engine oil level check cannot be
performed again via the display field,
use the dipstick to perform the engine
oil level check ( page 205).
In this case we recommend that you
have the system checked at a
Mercedes-Benz Light Truck Center.