If I confused you, my apology
Actually what I am saying is that the plastic parts in W220 is not as nice(both feel and look) as my W140. Not to mention W126. I think W126 although not as solid/heavy/hi-tech as W140, is the nicest S-Class ever made.
You should go see a W220 in person. Feel the plastic used in the interior, open up the boot, and go back to a 1999 W140, and try to feel the plastic(usually lower part of front power seats) and compare. Those plastic used in W220 is no better than the one you will find in the New Grand Cherokee, and definitely not up to par with Lexus LS400. See one in person, compare them all(includes any Dodge/Chrysler/Ford/GM luxury cars) and you should know what I am trying to say....
Again, sorry if I confuse you.