Mandoh,
I assume you don't have an owners manual. It would be a good idea to get one - once again, you can go to
www.bentleypublishers.com
If your car is the same as my 1999 1.8 avant, then as allwheelgrip points out, the fuse box is located at the end of the dashboard on the left. You have to open the door to see the cover.
Stick a screwdriver in the slot at the bottom of the cover and pry it off.
All the fuses are numbered. On my '99 the interior lights are fuse #14 (which is the same fuse as the vanity mirror lights in the visors, so you might check if they are working)
The fuses are numbered from the left, starting at the top and going down, then to the right. So there are two fuses in the first column, then the second column starts with fuse #3 at the top.
Yours may be different.
VB