Mercedes-Benz G-Class 2022 Operator's Manual page 386

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* NOTE Damage to the battery due to over-
voltage
When charging using a battery charger without
a maximum charging voltage, the battery or
the on-board electronics may be damaged.
Only use battery chargers with a maxi-
#
mum charging voltage of 14.8 V.
& WARNING Risk of explosion due to the
ignition of hydrogen gas
If there is a short circuit or sparks are created,
there is a danger of hydrogen gas igniting
when you charge the battery.
Make sure that the POSITIVE terminal of
#
a connected battery does not come into
contact with vehicle parts.
Never place metal objects or tools on a
#
battery.
When connecting and disconnecting the
#
battery, always observe the sequence of
battery terminals described.
During starting assistance, always take
#
care to connect only battery terminals of
identical polarity.
During starting assistance, observe the
#
sequence described for connecting and
disconnecting the jump leads.
Do not connect or disconnect the bat-
#
tery terminals with the engine running.
& WARNING Risk of explosion due to explo-
sive mixture of gases
An explosive mixture of gases can escape
from the battery during charging and starting
assistance.
Fire, naked flames, smoking and creating
#
sparks must be avoided.
Make sure there is adequate ventilation.
#
Do not stand over the battery.
#
Breakdown assistance 383
& WARNING Risk of explosion from a frozen
battery
A discharged battery may freeze at tempera-
tures slightly above or below freezing point.
During starting assistance or battery charging,
battery gas can be released.
Always allow a battery to thaw before
#
charging it or performing starting assis-
tance.
If the indicator/warning lamps in the Instrument
Display do not light up at low temperatures, it is
very likely that the discharged battery has frozen.
In this case you may neither jump-start the vehi-
cle nor charge the battery.
The service life of a battery that has been thawed
may be dramatically shortened. The starting char-
acteristics may be impaired, especially at low
temperatures.
It is recommended that you have a thawed battery
checked at a qualified specialist workshop.

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