Opel ASTRA K 2015 Owner's Manual page 222

220 Driving and operating
Illustration shows 5-door hatchback.
Illustration shows Sports Tourer.
Attach breakaway stopping cable to
eye.
Check that the coupling ball bar is
correctly installed
● Green marking on rotary knob
must point towards green
marking on coupling ball bar.
● There must be no gap between
the rotary handle and the
coupling ball bar.
● The coupling ball bar must be
firmly engaged in the opening.
● The coupling ball bar must be
locked and the key removed.
9 Warning
Towing a trailer is permitted only
when a coupling ball bar is fitted
correctly. If the coupling ball bar
does not engage correctly, seek
the assistance of a workshop.
Dismounting the coupling ball bar
Open the protective flap and turn the
key to position c to unlock the
coupling ball bar.
Pull out rotary handle and turn
clockwise as far as it will go. Pull out
coupling ball bar downwards.
Insert sealing plug in opening.
Fold away connecting socket.
On Sports Tourer insert cover into
rear bumper as shown in the
illustration.