Opel CASCADA Owner's Manual page 186

184 Vehicle care
Adaptive forward lighting
9 Danger
Adaptive forward lighting system
uses Xenon headlights.
Xenon headlights work under
extremely high electrical voltage.
Do not touch. Have bulbs replaced
by a workshop.
Bulbs for front turn signal and
corner lighting can be changed.
Sidelight/Daytime running lights are
designed as Light Emitting Diodes
(LEDs) and cannot be changed.
Corner lighting
1. Rotate the cap anticlockwise and
remove it.
2. Rotate the bulb holder
anticlockwise to disengage.
Withdraw the bulb holder from the
reflector.
3. Disengage the bulb from the plug
connector by pulling.
4. Replace the bulb and connect
bulb holder with the plug
connector.
5. Insert the bulb holder, engaging
the two lugs into the reflector and
rotate clockwise to secure.
6. Fit the cap and rotate clockwise.