The 2009 BMW 7-Series made its U.S. debut today at the 2008 LA Auto Show.?The U.S. will get two variants of the new 7-Series including the 750i and the 750 Li. The outgoing 360-hp 4.8L V8 will be replaced by the 4.4L twin-turbo V8 from the X6 xDrive50i.That makes an outstanding 400-hp with a maximum torque of 450 lb-ft for the very-large sedan. Mated to a 6-speed automatic transmission, BMW says that fuel-economy was also improved but wouldnt give us any specific numbers. What they did tell us was that the 2009 BMW 7-Series will be the first car to get its own Integrated Owners Manual. What does that mean?That mean your 2009 750i or 750 Li wont come with a physical book. Instead BMW will deliver the owners manual electronically through the iDrive. What happens when iDrive fails to operate? Well, you figure it out.Follow the jump for more high-res photos from the show.2009 BMW 750 Li - Live from 2008 LA Auto Show:???Tags: 2008 LA Auto Show, , 2009 BMW 7-Series, , 2009 BMW 750Li,