Mercedes-Benz GLS 2023 Operator's Manual page 417

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If unleaded premium grade gasoline is unavail-
able and you have to refuel using unleaded
regular gasoline:
Only fill the fuel tank to half full with
#
unleaded regular gasoline and refill as
soon as possible with unleaded premium
grade gasoline.
Do not drive at the maximum speed.
#
Avoid sudden acceleration and engine
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speeds over 3,000 rpm.
Further information on fuel is available at the fol-
lowing locations:
At a gas station
R
At a qualified specialist workshop
R
USA only: at http://www.mbusa.com
R
Information on additives in gasoline (vehicles with
gasoline engine)
Observe the notes on operating fluids
(
page 412).
/
* NOTE Damage from use of unsuitable
additives
Even small amounts of the wrong additive may
lead to malfunctions occurring.
Only add cleaning additives recommen-
#
ded by Mercedes-Benz to the fuel.
Mercedes-Benz recommends that you use brand-
name fuels with additives.
In some countries, the fuel available may not have
sufficient additives. Deposits could build up in the
fuel injection system as a result. In this case, in
consultation with a Mercedes-Benz Service Cen-
ter, mix the fuel with the cleaning additive recom-
mended by Mercedes-Benz. Observe the notes
and mixing ratios indicated on the tank.
Tank content and fuel reserve
Total fuel tank capacity
Model
All models
23.8 gal (90.0 liters)
Technical data 415
Fuel tank total capacity (Mercedes-Maybach)
Model
Mercedes-Maybach
23.8 gal (90.0 liters)
GLS 600 4MATIC
Fuel tank reserve
Model
All models
2.4 gal (9.0 liters)
Fuel tank reserve (Mercedes-Maybach)
Model
Mercedes-Maybach
3.2 gal (12.0 liters)
GLS 600 4MATIC
Engine oil
Notes on engine oil
Observe the notes on operating fluids
(
page 412).
/

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