See also:

Pulling a stuck vehicle
If your vehicle is stuck in sand, snow, mud, etc., use a tow strap or other device designed specifically for vehicle recovery. Always follow the manufacturer’s instructions for the recovery device. ...

Camera aiding sonar (parking sensor) (rear center sonar if so equipped)
The sonar (parking sensor) sounds a tone to inform the driver of obstacles near the bumper. WARNING ● The sonar (parking sensor) is a convenience feature. It is not a substitute for proper p ...

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 ...