The headliner in my 2000 358 has started to sag in different areas of the cabin, is this something that can be repaired easily or what routes have other owners taken to repair this.

Diablo, I have a 1998 26 same problem last year, its the foam and vinyl seperating I tried every quick fix that was told to me.I ended up pulling it down grinding the foam off the fiber glass (w/ 3m pads and die grinders carefully not taking off any glass,appox 40 to 48 hrs w/gear on) then took it to my upholstery guy.And went w/a hook loop material and it looks better than new and I got more headroom it formed to the glass instead of stretched. I got pic if interested. Turned out sweet.

I saw this post two years ago and am now having the exact same problem with my 2004 26 Prowler. I would greatly appreciate any pictures and/or advice that you may have to offer.

The only quick fix is to inject an adhesive in between the headliner and the fiberglass. It does an all right job for a while depending on how bad it was to start with.