Here's a brochure of what claims to be the new Mercedes-Benz S600. It even has a specification sheet!

The spec-sheet says that the S600's 6.0-liter bi-turbocharged V12 delivers 530PS (523hp) between 4,900 and 5,300 rpm and a massive 830Nm (612 lb-ft) of peak torque from 1,900 to 4,000 rpm.

The S600 isn't the most potent S-Class model, as this distinction belongs to the S65 AMG, the 6.0L V12 of which is rated at 621hp (630PS) and 1,000 Nm (737 lb-ft).