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444 Breakdown assistance
All vehicles
Plug-in hybrid: observe the notes in the Supple‐
ment. Otherwise, you may fail to recognise dan‐
gers.
* 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:
Only use undamaged jump lead/charging
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cables with a sufficient cross-section and
insulated terminal clamps.
Non-insulated parts of the terminal clamps
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must not come into contact with other metal
parts while the jump lead/charging cable is
connected to the battery/jump-start connec‐
tion point.
The jump lead/charging cable must not
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come into contact with any parts which may
move when the engine is running.
Always make sure that neither you nor the
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battery is electrostatically charged.
Keep away from fire and naked flames.
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Do not lean over the battery.
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Observe the additional following points when
charging the battery:
Only use battery chargers tested and
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approved for Mercedes-Benz.
Read the battery charger's operating instruc‐
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tions before charging the battery.
Observe the additional following points during
starting assistance:
Starting assistance may only be provided
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using batteries with a nominal voltage of
12 V.
The vehicles must not touch.
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Petrol engine: only accept starting assis‐
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tance if the engine and exhaust system are
cold.
Starting assistance and charging the 12 V
battery
Requirements:
The vehicle is secured with the electric park‐
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ing brake.
Vehicles with automatic transmission: the
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transmission is in position j.
The ignition and all electrical consumers are
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switched off.
The bonnet is open.
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