Mercedes-Benz GLC 200 4MATIC Owner's Manual page 412

Keep children away.
Wear safety glasses.
Observe this Owner's Manual.
Observe the following if you do not intend to use
the vehicle over an extended period of time:
Not plug-in hybrid: switch to standby mode.
R
Activating/deactivating standby mode
( page 237, 236)
/
Notes on starting assistance and charging the 12
V battery
All vehicles
When charging the battery and during starting
assistance, always use the jump-start connection
point in the engine compartment.
* 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-
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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
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a connected battery does not come into
contact with vehicle parts.
Never place metal objects or tools on a
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battery.
When connecting and disconnecting the
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battery, always observe the sequence of
battery terminals described.
Breakdown assistance 409
During starting assistance, always take
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care to connect only battery terminals of
identical polarity.
During starting assistance, observe the
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sequence described for connecting and
disconnecting the jump leads.
Do not connect or disconnect the bat-
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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
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sparks must be avoided.
Make sure there is adequate ventilation.
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Do not stand over the battery.
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