Vauxhall VECTRA Owner's Manual page 252

4. Rotate left bulb carrier a nd disengage.
250
5. Remove the bulb holder with bulb from
the reflector.
6
6. Detac h bulb from bulb mounting .
7. Insert new bulb into bulb mounting,
without touching the g lass.
8. Insert new bulb so that the two lugs on
the b ulb mounting engage in the
recesses in the reflector.
9. Rotate bulb carrier to right as far a s it
will go.
10. Place headlam p protective cover in
position and close.
11. When changing bulbs on the left-hand
sid e, refit the filler neck of the
headla mp wash bottle and click it
home.