Vauxhall Astra Owner's Manual page 191

Fitting the c oupling b all ba r
Remove the sealing plug from the hole for
the c oupling ba ll bar and stow it aw ay in
the lugga ge c om partment.
Check ing the tensioning of the coupling
ball bar
z Red mark ing on turn knob p oints
towards white marking on coupling ball
bar.
z Gap of approx. 4 m illim etres between
turn knob and coupling ball bar.
z K ey is in lock at position 1.
O therwise, the coupling ball bar must b e
tensioned b efore it is inserted into the
coupling housing:
z Unlock coupling ball bar (k ey to
position 1).
z Pull turn knob out and turn it forwards as
far as it will go – see illustration.
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