According to the manual of FIAT, seems to be so easy. But, they probably are so stupid, or they think that we are stupid. Is not possible to remove the back of the headlamp without moving an Fuse-holder.
But, after spending many hours thinking how to change one ordinary bulb, I decide (that's was the only way i found), to remove the front (plastic) holder of lights. There are only 3 screws, and removing them, that holder go straight just for the 5 cm, which is enough to change bulb at the back. After that, only put back the plastic headlight holder, and that's it. 10 minutes work.
Mile Georgiev, January 2005