Mercedes-Benz EQS 2021 Owner's Manual page 306

Pull the ball neck in the direction of the
#
arrow until it engages audibly in a vertical
position.
Indicator lamp 1 on the ball neck release
switch will go out.
If the ball neck is not securely locked in
place, the message Check trailer hitch lock
will appear on the driver display.
Remove the cover cap from the ball head and
#
store it in a safe place.
Make sure that the ball on the ball neck is clean.
Check that it is either greased or dry (grease-
free), depending on the instructions for the
trailer.
Folding the ball neck in
Pull switch 2 until the ball neck unlocks.
#
The ball neck will fold up under the rear
bumper.
Indicator lamp 1 will flash.
Push the ball neck in the direction of the
#
arrow until it engages audibly behind the
bumper.
Indicator lamp 1 will go out and the mes‐
sage on the driver display will disappear.
Observe the information about the displays on
the driver display:
Indicator and warning lamps (
R
Display messages ( page 433)
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R
Coupling up/uncoupling a trailer
& WARNING Risk of injury from the vehicle
level being changed
The vehicle level may be changed uninten‐
tionally, e.g. by other people. You may
become trapped if you couple up or uncouple
a trailer while this is happening. In addition,
other people could become trapped if their
limbs are between the vehicle body and the
tyres or underneath the vehicle.
Observe the following when coupling up or
uncoupling a trailer:
Do not open or close the doors or tail‐
#
gate.
Do not lock or unlock the vehicle.
#
Requirements:
The ball neck is extended and engaged in a
R
securely locked position.
page 495)
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Vehicles with level control: ensure the
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vehicle is at the normal level (
Do not deviate from the normal level during
trailer operation.
Driving and parking 303
page 273).
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