My guess would be one of these two ships
21.11.2005 FALSTAFF W W L
23.11.2005 CENTURY LEADER NR NYK-LINE
Depending on when your vehicle was completed, these two ships left Bremerhaven for Port Hueneme on the 21st and 23rd of November. BMW seems to use NYK-LINE the most to the west coast, so of these two ships it is probably the Century Leader which is carrying your car.
2006BmW is right though, you're dealer will know.