Mercedes-Benz G-Class 2020 Operator's Manual page 421

Only fill the fuel tank to half full with
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unleaded regular gasoline and fill up as
soon as possible with unleaded pre‐
mium grade gasoline.
Do not drive at the maximum design
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speed.
Avoid sudden acceleration and engine
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speeds over 3000 rpm.
Further information on fuel is available at the fol‐
lowing locations:
at a gas station
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at a qualified specialist workshop
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USA only: at http://www.mbusa.com
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Information on additives in gasoline
Observe the notes on operating fluids
( page 416).
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* NOTE Damage from use of unsuitable
additives
Even small amounts of the wrong additive
may lead to malfunctions occurring.
Only add cleaning additives recommen‐
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ded by Mercedes-Benz to the fuel.
Mercedes-Benz recommends that you use fuel
brands that have additives.
In some countries, the fuel available may not
have sufficient additives. Residue could build up
in the fuel injection system as a result. In this
case, in consultation with an authorized
Mercedes-Benz Center, the fuel may be mixed
with the cleaning additive recommended by
Mercedes-Benz. Be sure to observe the notes
and mixing ratios specified on the container.
Tank content and fuel reserve
Capacity
Model Total capacity
G 550 26.4 gal (100.0 liters)
Model Of which reserve
G 550 3.2 gal (12.0 liters)
Technical data 419
Engine oil
Notes on engine oil
Observe the notes on operating fluids
( page 416).
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* NOTE Engine damage caused by an
incorrect oil filter, incorrect oil or addi‐
tives
Do not use engine oils or oil filters other
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than those which meet the specifica‐
tions necessary for the prescribed
service intervals.