Dear 001,
After you broke the story of a new 5-series in the works (535), I did a little digging and found out that when they upgrade the engine on the 5-series, it could spell the end of the 525 in the US.
The 530 would then become the entry level 5-series model.
It would make sense because then you would have the 530, 535 and 545.
I doubt they would keep four models.
Gotta run...more spy stuff to uncover,
Dr. Venkman