People always rant about how cars "feel" but they forget that the human being's feelings are very limited. Just about 100% of those who have driven both a W140 and a W220 will say the W140 feels more solid, when Mercedes engineers released specs showing the W220 to be more rigid in all ways and crash tests have shown that it out performs the W140 in all crash tests. I think people confuse "weight" for a "solidity." A heavier car isn't always more solid / rigid than a lighter one as we all know.

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1999 Mercedes-Benz S600, 103K miles - garage queen
1988 Mercedes-Benz 560SEL, 89K miles - daily driver
2007 Hyundai Sonata Limited, 31K - daily driver