Mercedes-Benz S-Class 2023, Operator'S Manual

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When connecting and disconnecting the
battery, always observe the sequence of
battery terminals described.
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During starting assistance, always take
care to connect only battery terminals of
identical polarity.
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During starting assistance, observe the
sequence described for connecting and
disconnecting the jumper cables.
#
Do not connect or disconnect the bat-
tery terminals with the engine running.
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WARNING Risk of explosion due to a mix-
ture of explosive gases
A mixture of explosive gases can escape from
the battery during charging and jump starting.
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Fire, open flames, smoking and creating
sparks must be avoided.
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Make sure that there is sufficient ventila-
tion.
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Do not stand over the battery.
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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.
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Always allow a battery to thaw before
charging it or performing starting assis-
tance.
If the indicator/warning lamps on the instrument
cluster 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.
Plug-in hybrid
If your vehicle has been started with starting
assistance, it may not be possible to use the elec-
tric drive system for approximately 30 minutes.
Starting assistance is not considered to be a nor-
mal operating condition.
All vehicles
* NOTE Damage caused by numerous or
extended attempts to start the engine
Numerous or extended attempts to start the
engine may damage the catalytic converter
due to non-combusted fuel.
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Avoid numerous and extended attempts
to start the engine.
Observe the following points during starting assis-
tance and when charging the battery:
R
Use only undamaged jumper cable / charging
cables with a sufficient cross-section and
insulated terminal clamps.
R
Non-insulated parts of the terminal clamps
must not come into contact with other metal
Breakdown assistance 429