All of them are 4Matic. Even the Non S-Model(557ps) does 0-100 in 3,7s. How is that possible when the CLS63PP(557ps, RWD) does it in 4s? Just look at Mercedes. It is 4Matic. That's why it accelerates faster than the CLS63 with PP though they have same horsepower. The old CLS63 is RWD with 525ps or with PP 557ps.