Mercedes Benz 2009 M-Class User Manual
547
Technical data
Fuels, coolants, lubricants
Premium unleaded gasoline
(gasoline engine)
(gasoline engine)
Gasoline additives (gasoline engine)
A major concern among engine manufac-
turers is carbon build-up caused by gaso-
line. Mercedes-Benz recommends only the
use of quality gasoline containing additives
that prevent the build-up of carbon depos-
its.
turers is carbon build-up caused by gaso-
line. Mercedes-Benz recommends only the
use of quality gasoline containing additives
that prevent the build-up of carbon depos-
its.
After an extended period of using fuels
without such additives carbon deposits
can build up, especially on the intake
valves and in the combustion area, leading
to engine performance problems such as:
without such additives carbon deposits
can build up, especially on the intake
valves and in the combustion area, leading
to engine performance problems such as:
앫
Warm-up hesitation
앫
Unstable idle
앫
Knocking/pinging
앫
Misfire
앫
Power loss
Warning!
G
Gasoline is highly flammable and poisonous.
It burns violently and can cause serious
injury.
Never allow sparks, flame or smoking mate-
rials near gasoline!
Turn off the engine before refueling.
Whenever you are around gasoline, avoid in-
haling fumes and skin or clothing contact,
extinguish all smoking materials.
Direct skin contact with fuels and the inha-
lation of fuel vapors can damage your
health.
!
To maintain the engine’s durability and per-
formance, premium unleaded gasoline must be
used. If premium unleaded is not available and
low octane fuel is used, follow these precau-
tions:
used. If premium unleaded is not available and
low octane fuel is used, follow these precau-
tions:
앫
Have the fuel tank only partially filled with
unleaded regular and fill up with premium
unleaded as soon as possible.
unleaded regular and fill up with premium
unleaded as soon as possible.
앫
Avoid full throttle driving and abrupt acceler-
ation.
ation.
앫
Do not exceed an engine speed of 3000 rpm
if the vehicle is loaded with a light load such
as two persons and no luggage.
if the vehicle is loaded with a light load such
as two persons and no luggage.
앫
Do not exceed
2
/
3
of maximum accelerator
pedal position if the vehicle is fully loaded or
operating in mountainous terrain.
operating in mountainous terrain.