w140 rear suspension question

[jejr]

i have a really nice 1994 s500...white and silver interior...71k miles...
not driven a lot but here is the question.....

last year the ride started getting bouncy along with a thud when going over bumps. the bounce got really bad so i replaced the accumulators. that stopped the bounce but the thud still remained. now the ride seems really crappy like feeling every bump. not very smooth. also car seems to not sit quite high enough. what should the clearance be between the top of the tires and the rear wheel wells? now should i spend the big $$$ and replace the struts or should i look for something else maybe wrong?
if struts do get replaced should i do the front ones also?
maybe they are also bad?
i have had car for quite a few years and really never thought the ride was soft enough but maybe a harder ride is normal....
none of the struts have been replaced since my ownership.
car does "not" have ads.

maybe you guys can help...


thanks