Mercedes-Benz GL-Class 2012 Owners Manual - Manual (Page 374)

Vehicle model Capacity Fuel, coolant,
lubricants etc.
Air-
conditioning
system
All models — Refrigerant R134a
and special PAG
lubricant (never
R 12)
Windshield/
headlamp
cleaning
system
All models 7.6 US qt (7.2 l) MB windshield
washer
concentrate
48
( Y page 377)
Mixing ratio for
washer fluid
(
Y page 377)
Fuel
Important safety notes
G WARNING
Gasoline and diesel fuels are highly flammable
and poisonous. They burn violently and can
cause serious injury.
Never allow sparks, flames or smoking
materials near gasoline or diesel fuel!
Turn off the engine before refueling.
Whenever you are around gasoline or diesel
fuel, 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.
Premium-grade unleaded gasoline
!
To ensure the longevity and full
performance of the engine, only premium-
grade unleaded gasoline must be used.
If no premium-grade unleaded gasoline is
available and regular unleaded gasoline
must be used, observe the following
precautions:
R only fill the fuel tank to half full with
regular unleaded gasoline and fill the rest
with premium-grade unleaded gasoline
as soon as possible.
R do not drive at the maximum speed.
R
avoid sudden acceleration.
R
when the vehicle is carrying a light load,
e.g. two passengers without luggage, do
not allow the engine to rev above
3000 rpm.
R
when the vehicle is fully loaded or in
mountainous terrain, do not depress the
accelerator pedal further than ⅔ of the
pedal travel.
Fuel requirements
Gasoline engines
Use only premium-grade unleaded gasoline.
The octane number should be at least 91.
Details can be found on the gas pump. The
octane number is the average value of the
Research Octane Number (RON) and the
48 Mixed with water or premixed washer fluid with antifreeze protection.
372
Service products and capacities
Technical data