This was a forgone conclusion given that the top trim level G11 is now the M760i and the top trim level G30 is going to be the M550i.
So, BMW falls in line with Audi as their top trim level models below Quattro RS are designated S* (standard models are A* or Q*). Mercedes also recently changed their naming from Mercedes x### to Mercedes-AMG x## (currently only x43, but more likely to come) for top trim sub-AMG-proper models to leverage the AMG brand.
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