i have a set of solid rear headrests in ecru that i was told came from a UrS6. they don't fit my UrS4. however, it turns out they don't fit on a '95 S6, either. i'm trying to figure out what car these headrests will fit. the posts are about 3.5" apart (measured on the outsides of the posts). could these be for the UrS6/A6 avant? -teddy