That happened to me. My car was at the port (which for US bound X5's is simply the Vehicle Prep Center where they do final inspections before release to carrier to dealer) for about 1 month before it got released.

I checked the port sheets. There was no damage to the car. Just a horribly long wait.

From my inquires at the time, this was more common for cars coming to the West Coast (especially LA). But East Coast people got their cars fast!

Btw, make sure you inspect the car thoroughly before you take receipt of it. Mine still had glue all over that wasn't removed and the car was definitely not detailed.