Mercedes-Benz S-Class Saloon W223 2021 Owner's Manual page 383

Keep children away.
Observe this Owner's Manual.
Observe the following if you do not intend to use
the vehicle over an extended period of time:
Activate standby mode.
R
Alternatively: connect the battery to a battery
R
charger approved by Mercedes-Benz or con-
sult a qualified specialist workshop to discon-
nect the battery.
Notes on starting assistance and charging the 12
V battery
Vehicles with a lithium-ion battery
When charging the battery and during starting
assistance, always use the jump-start connection
point in the engine compartment.
* NOTE Damage to the battery from over-
voltage
When charging using a battery charger without
a restriction of the maximum charging voltage,
the battery or the on-board electronics can be
damaged.
Only use battery chargers with a maxi-
#
mum charging voltage of 14.8 V.
All other 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 from over-
voltage
When charging using a battery charger without
a restriction of the maximum charging voltage,
the battery or the on-board electronics can be
damaged.
Only use battery chargers with a maxi-
#
mum charging voltage of 14.8 V.
P223 0288 02
Breakdown assistance 381
& WARNING Risk of explosion from hydro-
gen gas igniting
There is a danger of hydrogen gas igniting
when charging the battery if there is a short
circuit or sparks start to form.
Make sure that the positive terminal of
#
the connected battery does not come
into contact with vehicle parts.
Never place metal objects or tools on a
#
battery.
The described order of the battery
#
clamps must be observed when connect-
ing and disconnecting the battery.
When giving starting assistance, always
#
make sure that you only connect battery
terminals with identical polarity.
During starting assistance, you must
#
observe the described order for connect-
ing and disconnecting the jump lead.
Do not connect or disconnect the bat-
#
tery clamps while the engine is running.