The secret sauce of the S 65 Coupe is the AMG-built V12, a twin-turbo monster with 621 horses and 738 pound-feet (1,000 Nm) on deck. Even so, the S 65 Coupe simply couldn't pull off a clean launch.

The CLK GTR Super Sport was more frenetic, thanks to a stroked 7.3-liter version of the V12 engine ... Whatever it means to ...