Mercedes-Benz Sprinter 907 2018 Operating Instructions Manual page 288

286
Breakdown assistance
Keep children at a safe distance.
Observe these Operating Instructions.
If you do not use the vehicle for a long period or
drive short distances regularly:
connect the battery to a charger recommen‐
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ded by Mercedes-Benz
consult a qualified specialist workshop to dis‐
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connect the battery
Starting assistance and charging the 12 V
battery
Always use the jump-start connection point in
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the engine compartment when charging the
battery and jump-starting.
* NOTE Damaging the battery through
overvoltage
When using a battery charger without a maxi‐
mum charging voltage, the battery or the
vehicle electronics may be damaged.
Only use battery chargers with a maxi‐
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mum charging voltage of 14.8 V.
& WARNING Risk of explosion from hydro‐
gen gas igniting
A battery generates hydrogen gas during the
charging process. If there is a short circuit or
sparks start to form, there is a danger of the
hydrogen gas igniting.
Make sure that the positive terminal of
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the connected battery does not come
into contact with vehicle parts.
Never place metal objects or tools on a
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battery.
When connecting and disconnecting the
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battery, you must observe the described
order for the battery clamps.
When giving starting assistance, always
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make sure that you only connect battery
terminals with identical polarity.
During starting assistance, you must
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observe the described order for con‐
necting and disconnecting the jump
lead.
Do not connect or disconnect the bat‐
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tery 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, naked flames, creating
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sparks and smoking.
Make sure that there is sufficient venti‐
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lation during the charging process and
during starting assistance.
Do not lean over a battery.
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& WARNING Risk of explosion from a fro‐
zen battery
A discharged battery may freeze at tempera‐
tures slightly above or below freezing point.
During starting assistance or battery charg‐
ing, battery gas may be released.
Always thaw a frozen battery out first
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before charging it or performing starting
assistance.
If the warning/indicator lamps do not light up in
the instrument display around or below freezing
point, it is very likely that the discharged battery
has frozen.
In this case, observe the following points:
do not give the vehicle starting assistance or
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charge the battery
the service life of a battery that has been
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thawed may be reduced drastically
the start-up behaviour may deteriorate, par‐
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ticularly at low temperatures
it is recommended that you have a thawed
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battery checked at a qualified specialist work‐
shop
* 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
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to start the engine.