You should say what your need when asking for help or drivers. Do you need a user manual, bios update, or drivers, ie: all or one? Medion, Mercury, and Kobian are all the same physically... only the name is different.
N1996 does not appear to be a valid Medion model number.
Edit: If you look close at the pictures in this page, you will notice the number N1996 on a MSI P4M900M2-L motherboard. I think that's some kind of date code or other code, not a motherboard model number.
If you can give us the bios id string, we might be able to provide additional help.
BIOS ID string location: