Just got mine a week ago and so far:
I called up a place to get my windows tinted
Tint guy- what kind of car is it?
Me- it's a BMW 1series
Tint guy- "a 1series"? His tone was as if he misheard me
Another incident is when I called my insurance company to tell them my new vehicle is a BMW 135i. When I went to pick up the card, she put it as a 335i.