There's a 'blind' which folds back into the roof, and runs along rails where the headlining is. For normal day driving you'd be able to put it all the way forward to have a windscreen basically like a normal car
http://media.opel.com/content/media/...mic-windscreen
In the event of very powerful sun rays, a roller blind can be lowered inside the cabin which sits under the panoramic glass. This helps create a pleasant atmosphere. The device which is continuously variable can be easily adjusted and then may be attached with a turning handle. The solar protection comes complete with an integrated sun visor which even in its opened state disappears behind the rear roof component.
You can see the rails here:
http://mediaassets.gmeuropearchive.i...=178217&lng=EN