help with specifics
 

My partner just inherited a Opel Omega(b) 3.0V6, and is wondering where to get information on the car. specially how to adjust the Sunroof, as the one we have doesn't shut down fully and how to get the shield on the rear window to work, the car is in remarkeable condition for 1996, all original inside.
also something on the electronics of the car would be appreciated:)