Opel 2016 ASTRA Owner's Manual page 250

248 Vehicle care
2. Unscrew the plastic securing nut
from the inside by hand.
3. Carefully withdraw the tail light
assembly from recesses and
remove. Make sure that the cable
duct remains in position.
4. Detach the cable from the
retainer.
5. Detach the wiring plug from the
bulb carrier.
6. Unscrew the three screws with a
screwdriver and remove the bulb
carrier from the light assembly.
7. Remove and replace the bulb by
withdrawing or pushing the bulb
slightly into the socket and
rotating anticlockwise:
Tail light (1)
Brake light (2)
Turn signal light (3)
8. Insert the bulb carrier into the tail
light assembly and screw into
place. Connect the wiring plug
and press the cable into the
retainer. Fit light assembly with
the retaining pins into the
recesses of the vehicle body and
tighten the plastic securing nut