Mercedes-Benz AMG GT 53 4MATIC+ 2019 Operator's Manual page 378

376 Breakdown assistance
Always make sure that neither you nor the
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battery is electrostatically charged.
Keep away from fire and open 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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Gasoline 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:
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The transmission is in position j.
The ignition and all electrical consumers are
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switched off.
The hood is open.
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Slide cover 1 of positive clamp
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jump-starting connection point in the direc‐
tion of the arrow.
Connect positive clamp 2
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the positive pole of the donor battery using
the jumper cable/charging cable. Always
begin with positive clamp 2
vehicle first.
2 on the
on your vehicle to
on your own