Charging The High-Voltage Battery; Discharged Battery - Mercedes-Benz B-Class Electric Drive W245 Operator's Manual

The vehicle's high voltage electrical system is
under high voltage.
Do not handle high-voltage components or
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the orange cables of the vehicle's high-volt-
age electrical system.
Do not touch high-voltage components or
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the orange cables of the high-voltage elec-
trical system when a vehicle has been
involved in a crash.
Do not touch any damaged components or
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the damaged orange cables of the vehicle's
high-voltage electrical system.
Do not remove the covers of the high-volt-
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age electrical system components that are
marked with a warning sticker.
General notes
Method of operation
The vehicle is equipped with a high-voltage
battery for driving. The high-voltage battery
stores the energy needed to operate the elec-
tric motor and releases it again.
The electric motor uses energy that has been
stored in the high-voltage battery when pull-
ing away, accelerating and during the jour-
ney.
In overrun mode, kinetic energy is converted
by means of energy recuperation into electri-
cal energy and stored in the high-voltage bat-
tery.
The high-voltage battery can be charged as
follows:
through energy recuperation while the
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vehicle is in motion
with the charging cable at a mains socket
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while the vehicle is stationary
with the charging cable at a charging sta-
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tion while the vehicle is stationary
The high-voltage battery can be charged in a
voltage range from 110 V to 240 V.
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If the condition of charge drops to less
than 13%, the high-voltage battery reserve
indicator lamp lights up in the instrument

Charging the high-voltage battery

cluster. Charge the high-voltage battery as
soon as possible.
Below a condition of charge of 5%, the per-
formance of the vehicle is reduced.
The vehicle's high-voltage electrical system
switches off at a condition of charge of 0%.
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Use of the pre-entry climate control (via
key) may mean that the high-voltage bat-
tery is not fully charged.

Discharged battery

The vehicle's high-voltage electrical system
switches off if the high-voltage battery is com-
pletely discharged. 30 seconds prior to this,
you are informed of the switch-off by the
Battery level too low. Stop and Battery level too low. Stop and
charge immediately charge immediately
tects the battery from exhaustive discharge.
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It is not possible to restart the drive sys-
tem until after charging.
Do not leave the vehicle parked for longer
than 14 days with a high-voltage battery con-
dition of charge below 20%.
You can check the condition of charge in the
charge level display (
Further information on the "Energy flow dis-
play" can be found in the "Trip" menu
( page 176).
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High and low outside temperatures
Low outside temperatures
The efficiency of the high-voltage battery is
significantly reduced at very low outside tem-
peratures. The high-voltage battery is then no
longer able to provide the normal electrical
power output.
High outside temperatures
To prevent damage to the high-voltage bat-
tery due to very high outside temperatures,
the maximum power output of the high-volt-
age battery is reduced automatically.
The E-CELL display indicates the maximum
amount of power available (
message. This pro-
page 174).
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page 173).
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