Opel Astra 2013 Owner's Manual page 252

250 Vehicle care
3. Pull bulb from bulb holder and
replace it.
4. Insert bulb holder and turn
clockwise.
5. On left side: insert front end into
front wing, slide forward and insert
rear end.
On right side: insert rear end into
front wing, slide rearward and
insert front end.
5-door hatchback, 4-door
notchback, Sports tourer
To replace bulb, remove lamp
housing:
1. On left vehicle side, slide lamp to
the front and remove it out of the
front wing with the rear end.
On right vehicle side, slide lamp to
the rear and remove it out of the
front wing with the front end.
2. Turn bulb holder anticlockwise
and remove from housing.
3. Pull bulb from bulb holder and
replace it.