Centurion
Apex Apex Predator
The Pre-Scan technology can not be introduced by another model than the S-Class. It's a comfort element and a quite revolutionary new technology, it has to be shown by the falgship.
And the flagship of Mercedes always was, is, and will be the S-Class, no matter what über-expensive new model is released. This is the one unleashing the innovations-firework.
So it's either for the FL 221, or for the W222. Certainly not for the SL, with its (increased) sporty pretentions.
That did cross my mind as the S-Class is THE mothership. But the SL is very much a comfort car, just look at all the 60 years old male taking their SL to a golf course. In the end the S-Class has four seats and is meant to transport people in comfort so you're right, it is the ideal car for launching pre-safe.
So pre-safe must debut in the S-class then but a new S-class isn't due until 3 years from now and by then the competitors might beat Mercedes to it. Conclusion: Presafe might debut in the facelift!
Anyone else with a different theory?