Mercedes-Benz S-Class Owner's Manual page 157

& DANGER Risk of fatal injury due to incor‐
rect handling of the socket
You could receive an electric shock:
if you reach into the socket.
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if you insert unsuitable devices or objects
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into the socket.
Do not reach into the socket.
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Only connect suitable devices to the
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socket.
Requirements:
Only connect devices with a suitable plug
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which conforms to the standards specific to
the country you are in.
Only connect devices up to a maximum of
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150 watts.
Do not use multiple socket outlets.
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Vehicles with a rear bench seat or electrically
adjustable outer seats
Seats and stowing 155
Vehicles with individual rear seats
Open flap 3.
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Insert the plug of the device into 230 V
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socket 2.
When the on-board electrical system voltage
is sufficient, indicator lamp 1 lights up.