Opel Automobile Owner's Manual page 160

160 Vehicle care
2. Unscrew three plastic securing
nuts by hand.
3. Remove tail light assembly. Take
care that the cable duct remains in
position.
Detach wiring plug from bulb
holder.
4. To change only the tail light (1),
rotate plastic nut anticlockwise
and remove it from the bulb
holder.
Push bulb into socket slightly,
rotate anti-clockwise, remove and
renew bulb. Insert plastic nut into
bulb holder and rotate clockwise.
5. To change the other lights,
unscrew the screws and remove
bulb holder.