Opel Astra Owner's Manual page 267

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Saloon 3-door
1. To replace bulbs, fold the cover down.
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2. Detach plug connector from bulb holder.
3. Hold outside of bulb housing, loosen
fastening nuts with wheel bolt wrench 3
and unscrew by hand. Wheel bolt
wrench 3, see vehicle tools 3 236.
Self-help, vehicle care
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4. Detach bulb housing towards the rear.
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