S locks it in 1st/2nd, so it's wherever your speedometer's two-dots marking is. That's the top of 2nd for downshifting purposes, and is frequently quite close to the max acceleration-achievable speed too.

Also, these things can never really hit any sort of redline so if it was a desperate hill climb and your temperatures held low enough to be safe you could plant your foot in the floor in S and just keep trucking.

__________________


~Michael S.~
Past cars:

1986 300SDL
1987 300SDL
1982 240D
1982 300SD


Current:

1987 300SDL