Mercedes-Benz S-Class 2020 Owner's Manual page 297

294 Driving and parking
Observe the following notes on the tongue
weight:
Do not use a tongue weight that exceeds or
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falls below the permissible tongue weight
Use a tongue weight as close as possible to
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the maximum tongue weight
Do not exceed the following values:
Permissible towing capacity
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Permissible rear axle load of the towing vehi‐
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cle
Permissible gross weight of the towing vehi‐
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cle
Permissible gross weight of the trailer
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Maximum permissible speed of the trailer
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Ensure the following before starting a journey:
The tyre pressure on the rear axle of the tow‐
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ing vehicle is set for a maximum load
The lighting of the connected trailer is opera‐
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tional
In the event of increased rear axle load, the car/
trailer combination must not exceed a maximum
speed of 100 km/h for reasons concerning the
operating permit. This also applies in countries
in which the permissible maximum speed for
car/trailer combinations is above 100 km/h.
Extending and retracting the ball neck fully
electrically
& WARNING Risk of accident due to the
ball neck not being engaged
If the ball neck is not engaged, the trailer
may come loose.
Make sure that the ball neck securely
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engages and locks into place.
* NOTE Damage to the all-electric trailer
hitch due to additional pressure
The all-electric trailer hitch could be mechan‐
ically damaged by applying additional pres‐
sure when the ball neck is being extended or
retracted.
Do not make the ball neck extend/
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retract faster by applying additional
pressure.
* NOTE Increased risk of damage to prop‐
erty due to folded-out ball neck
When the trailer is not coupled or the
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bicycle rack is attached, fold in the ball
neck or, in the case of a fully electric
trailer hitch, retract the ball neck.
Requirements:
The vehicle is secured against rolling away.
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The swivel range is clear.
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The trailer cables or adapter plugs have been
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removed.