Opel Automobile Owner's Manual page 178

178 Vehicle care
2. Detach plug connector from bulb
holder.
3. Loosen fastening nuts and
remove the bulb housing
rearwards.
4. Unscrew the three screws with
a screwdriver and remove the
bulb holder. Vehicle tools 3 189.
5. Remove and renew the bulb.
Reverse light/brake light (1)
Turn signal light (2)
Reverse light (3)
Fog light, may be only on one side
(4)
6. Engage bulb holder in bulb
housing and screw in place. Insert
the bulb housing into the body and
tighten the fastening nuts by
hand.
Attach the plug connector.
Close and engage the cover.