I had a loaner S320 once as they gave away my "rental" ML, and so they took a used S320 off the lot.
Well, I really liked it. Wouldn't buy one, as it's just too durned big for me, but as S-Class cars go, I thought it a real treat. The engine bay had lots of room, and M104 long term costs (save for head gaskets) are really low. The car was not as powerful as an S500, but still had lots of spunk. Burns less gas too.
1998 C230 "Black Betty"