See also:

Backing up near a projecting object
Backing up near a projecting object The predicted course lines A do not touch the object in the display. However, the vehicle may hit the object if it projects over the actual backing up course. ...

Towing a trailer
WARNING Overloading or improper loading of a trailer and its cargo can adversely affect vehicle handling, braking and performance and may lead to accidents. CAUTION ● Do not tow a trailer ...

Safety
As of this writing, the 2011 QX56 hasn't been crash-tested. Standard safety features include front and side-impact airbags, side-curtain airbags for all three rows, an electronic stability system ...