arms are folded forward away from the
windshield.
XLift hood up slightly.XPush safety hook ; in direction of arrow.XPull up on hood.
The hood will be automatically held open at
shoulder height by gas-filled struts.
Closing
GWarning!
When closing the hood, use extreme caution
not to catch hands or fingers. Be careful that
you do not close the hood on anyone.
Make sure the hood is securely engaged
before driving off. Do not continue driving if
the hood can no longer engage after an
accident, for example. The hood could
otherwise come loose while the vehicle is in
motion and injure you and/or others.
XLet the hood drop from a height of
approximately 1 ft (30 cm).
XCheck to make sure the hood is fully
closed.
If you can raise the hood at a point above
the turn signals to the left and right of the
hood, then it is not properly closed. Open
it again and let it drop with somewhat
greater force.
Engine oil
The amount of oil your engine needs will
depend on a number of factors, including
driving style. Increased oil consumption can
occur when the vehicle is new or the vehicle
is driven frequently at higher engine speeds.
Engine oil consumption checks should only
be made after the vehicle break-in period.
! Do not use any special lubricant additives,
as these may damage the drive assemblies.
Using special additives not approved by
Mercedes-Benz may cause damage not
covered by the Mercedes-Benz Limited
Warranty.
For further information contact an
authorized Mercedes-Benz Center.
Notes on checking engine oil level
When checking the oil level the vehicle must
be parked on level ground.
G 550: The vehicle must have been stationary
for at least 5 minutes with the engine turned
off.
G 55 AMG: With the engine at operating
temperature, the vehicle must have been
stationary for at least 5 minutes with the
engine turned off.
With the engine not at operating temperature,
the vehicle must have been stationary for at
least 30 minutes with the engine turned off.
Checking engine oil level with the oil
dipstick
On the G 550, you can check the engine oil
level with the oil dipstick.
XOpen the hood (Y page 148).Engine compartment149Operation463_AKB; 2; 52, en-USd2ureepe,Version: 2.11.7.12008-12-02T10:52:11+01:00 - Seite 149Z
Viscosity grades for engine oils
Using the chart below, select oil viscosity
according to the lowest air temperature
expected before the next oil change.
Engine oil additives
! Do not blend oil additives with engine oil.
They may damage the engine. Damage or
malfunctions resulting from blending oil
additives are not covered by the Mercedes-
Benz Limited Warranty.
Air conditioning refrigerant
R134a (HFC) refrigerant and special PAG
lubricating oil are used in the air conditioning
system.
! Never use R 12 (CFC) or mineral-based
lubricating oil. Otherwise damage to the
system will occur.
Brake fluid
GWarning!
During vehicle operation, the boiling point of
the brake fluid is continuously reduced
through the absorption of moisture from the
atmosphere.
Under extremely strenuous operating
conditions, this moisture content can lead to
the formation of bubbles in the system, thus
reducing the system’s efficiency.
Therefore, the brake fluid must be replaced
regularly. Refer to your vehicle’s Maintenance
Booklet for replacement interval.
Only brake fluid approved by Mercedes-Benz
is recommended. Any authorized Mercedes-
Benz Center will provide you with additional
information.
Premium unleaded gasoline
GWarning!
Gasoline is highly flammable and poisonous.
It burns violently and can cause serious
personal injury.
Never allow sparks, flames or smoking
materials near gasoline!
Turn off the engine before refueling.
Whenever you are around gasoline, avoid
inhaling fumes and any skin or clothing
contact. Extinguish all smoking materials.
Direct skin contact with fuels and the
inhalation of fuel vapors are damaging your
health.
! To maintain the engine’s durability and
performance, premium unleaded gasoline
must be used.
If premium unleaded gasoline is not
available and low octane gasoline is used,
follow these precautions:
RHave the fuel tank only partially filled
with unleaded regular gasoline and fill up
with premium unleaded gasoline as soon
as possible.
RAvoid full throttle driving and abrupt
acceleration.
RDo not exceed an engine speed of
3 000 rpm if the vehicle is loaded with a
light load such as two persons and no
luggage.
RDo not exceed 2/3 of maximum
accelerator pedal position if the vehicle
254Fuels, coolants, lubricants, etc.Technical data
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