Opel INSIGNIA 2017 Owner's Manual page 239

A buzzing tone sounds as a warning
when the release handle is pulled out
and the ball neck is disengaged.
Take the released coupling ball bar
and raise it up until it engages.
Ensure the coupling ball bar is
correctly engaged and the released
handle is guided back to its hidden
initial position, otherwise the buzzing
tone will not stop.
Stow/hide coupling ball bar
Pull the grip located left of the number
plate under the rear bumper fascia at
an angle of approx. 45° to the ground.
Driving and operating
A buzzing tone sounds as a warning
when the release handle is pulled out
and the ball neck is disengaged.
With the flat of the hand, swivel the
released coupling ball bar to the right
until it engages under the floor. Make
sure that the release handle is back in
its hidden initial position, otherwise
the buzzing tone will not stop.
9 Warning
Towing a trailer is permitted only
when the coupling ball bar is fitted
correctly. If the coupling ball bar
does not engage correctly or if the
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