Mercedes-Benz GLE Operator's Manual page 175

If you have accidentally refueled with the
wrong fuel:
Do not switch the ignition on.
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Consult a qualified specialist workshop.
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* NOTE Do not use diesel to refuel vehi‐
cles with a gasoline engine
If you have accidentally refueled with the
wrong fuel:
Do not switch the ignition on. Otherwise
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fuel can enter the engine.
Even small amounts of the wrong fuel
could result in damage to the fuel system
and the engine. The repair costs are high.
Consult a qualified specialist workshop.
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Have the fuel tank and fuel lines
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drained completely.
* NOTE Damage to the fuel system caused
by overfilled fuel tanks
Only fill the fuel tank until the pump
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nozzle switches off.
If you have added too much fuel because of a
defective filling pump, for instance:
Do not switch the ignition on.
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Consult a qualified specialist workshop.
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* NOTE Fuel may spray out when you
remove the fuel pump nozzle
Only fill the fuel tank until the pump
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nozzle switches off.
Requirements:
Plug-in-hybrid: for vehicles with a gasoline
engine, observe the notes in the Supplement.
You could otherwise fail to recognize dangers.
The vehicle is unlocked.
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Driving and parking 173
% Do not get into the vehicle again during the
refueling process. Otherwise, electrostatic
charge could build up again.
Observe the notes on operating fluids and fuel.
Only refuel with fuel that has at least the octane
number specified in the information label in the
fuel filler flap. Otherwise, engine output can be
reduced and fuel consumption increased.