BENZ S class 350系列, 220 和 221 的分別.

S350
http://www.zungfu.com/products/Passenger_Car/S-Class/S350/S350.php

The S Class, in 1994 was the (W140) Model S320 SWB, equipped with a straight 6 cylinder (104.9) engine and an (722.5/.6) automatic transmission. The S Class has come a long way since then. Changing to the ever popular (W220/221) series with an available AMG supercharged V-8 and a V-12 with all the latest technological innovations.

http://www.theworkshopmb.com/S-Class.htm
220:----http://www.conceptcarz.com/view/photo/56946,7737,0,0/photo.aspx
221:----http://www.conceptcarz.com/view/photo/173478,13006,0,0/photo.aspx

So where in the answer is related to the difference between a W220 S350 and S221 S350 at all?
Most voters are just plain irresponsible and stupid, that's sad.

S-Class W220(第九代), W221(第十代)
Mercedes-Benz S-Class (W220)
V6 engine/3700c.c./245hp

圖片參考：http://hk.wrs.yahoo.com/_ylt=A8tU33hhnMlGdzcBCxy.ygt./SIG=1335u0191/EXP=1187704289/**http%3A//www.executivemotorimports.com/images/Inventory/MB_S430_2000/DSC01255.JPG

Mercedes-Benz S-Class (W221)
V6 engine/3500c.c./272hp

圖片參考：http://hk.wrs.yahoo.com/_ylt=A8tU32zQnslGKNkAEWS.ygt./SIG=13ai49skr/EXP=1187704912/**http%3A//www.allcarwallpapers.com/wallpapers/previews/mercedez-benz-s-class-w221-827.jpg