User Manual - Page 364

For 2019 S-Class Cabriolet.

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#
When giving starting assistance, always
make sure that you only connect bat
ter y terminals with identical polarity.
#
During starting assistance, you must
observe the described order for con
necting and disconnecting the jumper
cables.
#
Do not connect or disconnect the bat
ter y clamps while the engine is running.
&
WARNING Risk of explosion during
charging process and starting assistance
During the charging process and starting
assistance, the battery may release an explo
sive gas mixture.
#
Avoid fire, open f lames, creating sparks
and smoking.
#
Make sure that there is sufficient venti
lation during the charging process and
during starting assistance.
#
Do not lean over a battery.
&
WARNING Risk of explosion from a fro
zen batter y
A discharged battery may freeze at tempera
tures slightly above or below freezing point.
During starting assistance or battery charg
ing, batter y gas may be released.
#
Always thaw a frozen battery out first
before charging it or performing start
ing assistance.
If the indicator/warning lamps in the instrument
cluster do not light up at low temperatures, it is
ver y likely that the discharged battery has fro
zen. In this case you may neither jump-start the
vehicle nor charge the batter y.
The service life of a battery that has been
thawed may be dramatically shortened. The
starting characteristics may be impaired, espe
cially at low temperatures.
It is recommended that you have a thawed bat
ter y checked at a qualified specialist workshop.
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.
#
Avoid numerous and extended attempts
to start the engine.
Observe the following points during starting
assistance and when charging the battery:
R
Only use undamaged jumper cables/charg
ing 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
parts while the jumper cable/charging cable
is connected to the battery/jump-start con
nection point.
R
The jumper cable/charging cable must not
come into contact with any parts which may
move when the engine is running.
Breakdown assistance
365
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