The S-Klasse peaked @ W140 and then went downhill. I must say the W220 has grown on me a lot after those years, it looks like a W126 after an extreme facelift to me (and I also like the W126 obviously). The W221 is a blasphemy and a reason not to revere Daimler anymore.

BTW, the S-Klasse nameplate only started quite recently, some of the cars in the poll aren't legitimate S-Klasses.