Mercedes-Benz S-Class Saloon W223 2021 Owner's Manual page 294

292 Driving and parking
Make sure that the cable is always slack for
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ease of movement during cornering.
Under the following conditions, a message may
appear on the driver's display even if the trailer
has been connected correctly:
LEDs have been installed in the trailer lighting
R
system.
The current has fallen below the trailer lighting
R
system's minimum current (50 mA).
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Accessories can be connected to the perma-
nent power supply up to 180 W and to the
power supply that is switched on via the igni-
tion lock.
Uncoupling a trailer
& WARNING Risk of being crushed and
becoming trapped when uncoupling a
trailer
When uncoupling a trailer with an engaged
inertia-activated brake, your hand may
become trapped between the vehicle and the
trailer drawbar.
Do not uncouple trailers with an engaged
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overrun brake.
* NOTE Damage when uncoupling in a state
of overrun
Uncoupling in a state of overrun can damage
the vehicle.
Do not uncouple trailers with an engaged
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overrun brake.
& WARNING Risk of becoming trapped when
disconnecting the trailer cable
Vehicles with level control system: The vehicle
may lower when the trailer cable is disconnec-
ted.
This could result in you or other people
becoming trapped if your or their limbs are
between the vehicle body and the tyres or
underneath the vehicle.
Make sure that nobody is underneath the
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vehicle or in the immediate vicinity of the
P223 0288 02
wheel arches when you disconnect the
trailer cable.
* NOTE Damage to the rear bumper from
installing adapter cables or adapter plugs
The following parts could be damaged when
swiveling the ball neck fully electrically:
Bumper
R
Adapter cable
R
Adapter plug
R
Always remove the adapter cable or
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adapter plug before swiveling the ball
neck fully electrically.
Secure the trailer against rolling away.
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Disconnect the electrical connection between
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the vehicle and the trailer.
Uncouple the trailer.
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Place the cover cap on the ball head.
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