I think MB should call them what they actually are, when and wherever it doesn't pose a conflict or confusion.

I'm thinking that the next generation V12 will be a 6.6L V12, naturally aspirated, but they'll call it a "600" in most markets, but here in the U.S. it will be the S660. It might 6.5L and then of course the S650, don't like that as much.

M