Cars without BMW Assist should NOT have the "fin." If the fin is on there, it is likely a mistake. I did a lot of poking into this issue because I did NOT want the fin on my car. I'd initially ordered mine with the premium package; didn't really care about BMW Assist, so when I found out that there was no way to leave the fin off with PP, I had the package deleted and ordered the options separately. I might have used the free BMW Assist service for the first year, but there's no way that I'd pay what BMW is asking for the annual fee afterwards, so the fin would just be sitting there useless. Personally, I think it ruins the the clean lines of the coupes (what I'm getting), but at least it's not the huge monstrosity that Audi owners have to deal with!