Mercedes-Benz AMG GT Operator's Manual page 287

Connect positive clamp 2 on your vehicle to
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the positive pole of the donor battery using
the jumper cable/charging cable. Always
begin with positive clamp 2 on your own
vehicle first.
During starting assistance: start the
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engine of the donor vehicle and run at idle
speed.
Connect the negative pole of the donor bat‐
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tery and ground point 3 of your own vehicle
by using the jumper cable/charging cable.
Begin with the donor battery first.
During starting assistance: start the
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engine of your own vehicle.
During the charging process: start the
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charging process.
During starting assistance: let the engines
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run for several minutes.
During starting assistance: before discon‐
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necting the jumper cable, switch on an elec‐
trical consumer in your own vehicle, e.g. the
rear window heater or lighting.
When the starting assistance/charging process
is complete, perform the following steps:
First, remove the jumper cable/charging
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cable from ground point 3 and the negative
pole of the donor battery, then from positive
clamp 2 and the positive pole of the donor
battery. Begin each time with the contacts
on your own vehicle first.
After removing the jumper cable/charging
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cable, close cover 1 of positive clamp 2.
Further information can be obtained at a quali‐
fied specialist workshop.
Replacing the 12 V battery
Observe the notes on the 12 V battery
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( page 281).
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Mercedes-Benz recommends that you have the
12 V battery replaced at a qualified specialist
workshop, e.g. at an authorized Mercedes-Benz
Center.
Breakdown assistance 285
If you want to replace the battery yourself,
observe the following notes:
Replace a faulty battery with a battery which
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meets the specific vehicle requirements.
The vehicle is equipped with a lithium-ion
battery. Full vehicle functionality is only guar‐
anteed with a lithium-ion battery. For safety
reasons, Mercedes-Benz recommends that
you only use batteries which have been tes‐
ted and approved for your vehicle by
Mercedes-Benz.
Use detachable parts such as vent hoses,
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elbow fittings or terminal covers from the
battery which is to be replaced.
Make sure that the vent hose is always con‐
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nected to the original opening on the side of
the battery.
Install any existing or supplied cell caps.
Otherwise, gases or battery acid could
escape.
Make sure that detachable parts are recon‐
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nected in the same way.