Mercedes-Benz AMG GT Operator's Manual page 199

196 Driving and parking
Recommendations when handling the high-voltage
battery:
If leaving the vehicle idle for lengthy periods,
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park up the vehicle with a high-voltage battery
charge level between 25% and 30%. Do not
keep the high-voltage battery continuously
connected to power supply equipment.
If leaving the vehicle idle for lengthy periods of
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time avoid, if possible, high ambient tempera-
tures.
Check the high-voltage battery's charge level
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every six weeks ( page 206).
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Charge the high-voltage battery if the charge
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level is below 15%.
If the high-voltage battery is only used with
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low charge levels, fully charge the high-voltage
battery every six months.
Do not disconnect the 12 V battery even if the
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vehicle is left idle for a lengthy period. Other-
wise, the condition of the vehicle's high-volt-
age battery cannot be monitored.
Charging options for the high-voltage battery
(mode 2 and 3)
The high-voltage battery will be charged by recu-
peration while you are driving. The electric motor
serves as an alternator when in overrun mode and
during braking.
You have the following options to charge while
stationary:
At a mains socket (mode 2)
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At a wallbox or charging station (mode 3)
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Observe the different grid requirements of your
current location when charging. Only use charging
cables which conform to the grid requirements.
Consult a qualified electrician or your local grid
operator if you have any questions.
It is recommended that you charge the high-volt-
age battery at a wallbox or charging station due to
the improved charging performance and better
charging efficiency offered.
System limits
The power output of the high-voltage battery may
be impaired by the following:
High or low outside temperatures
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Electrical auxiliary consumers in the vehicle
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being switched on, e.g. operating the air con-
ditioning system
Extended periods without charging
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The charging time of the high-voltage battery may
be increased by the following:
High or low outside temperatures
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Extended periods without charging
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The maximum available charge current of the
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charging facility
Stowing the charging cable
Always stow the vehicle's charging cable in the
charging cable bag provided, and secure the
charging cable bag in the boot or load compart-
ment with the included retaining strap. Otherwise,
the charging cable bag with the charging cable is
not sufficiently secured.