well it is an old car …so the previous years of not undercoating and rustproofing caused the rust. newer 240s may have some rust, but not completly rusted out frame rails since they are a few years younger…unless someone left salt on the underbody after a snow storm and never washed under it then of course it will have rust…i dont think the newer ones have rust on the strut towers but i know a few people with s13’s with holes in their strut towers