Hi guys
I'm not too familiar with car rental, so I thought I'd ask here.
I want to rent a car for 4 weeks at Oakland airport. Specifically the Bmw X5. I see in the other car classes it says "type.. or similar", but not under the X5. Does that mean I will get that car specifically when I book it now, or is there still a chance they will have something completely different for when I arrive? I can't see any fine print during the booking process..

Thanks for any help