I can attest to gstigler's comments. Have owned a 95E320 for 1-1/2 years. Really liked it, so decided to look for a good used S class. Really wanted a S500 between 92 and 99, but a 95S420 came up cheap, all records, lots of milage. Ride difference is incredible, but the 420 needs to work to move it around.
Only been two weeks and it is still not on the road legally (needs to get the mechanical fitness done today), but am looking forward to the christmas holiday to get aquainted.
Good luck in your search